var OrbitDB =
/******/ (function(modules) { // webpackBootstrap
/******/ 	// The module cache
/******/ 	var installedModules = {};

/******/ 	// The require function
/******/ 	function __webpack_require__(moduleId) {

/******/ 		// Check if module is in cache
/******/ 		if(installedModules[moduleId])
/******/ 			return installedModules[moduleId].exports;

/******/ 		// Create a new module (and put it into the cache)
/******/ 		var module = installedModules[moduleId] = {
/******/ 			exports: {},
/******/ 			id: moduleId,
/******/ 			loaded: false
/******/ 		};

/******/ 		// Execute the module function
/******/ 		modules[moduleId].call(module.exports, module, module.exports, __webpack_require__);

/******/ 		// Flag the module as loaded
/******/ 		module.loaded = true;

/******/ 		// Return the exports of the module
/******/ 		return module.exports;
/******/ 	}


/******/ 	// expose the modules object (__webpack_modules__)
/******/ 	__webpack_require__.m = modules;

/******/ 	// expose the module cache
/******/ 	__webpack_require__.c = installedModules;

/******/ 	// __webpack_public_path__
/******/ 	__webpack_require__.p = "";

/******/ 	// Load entry module and return exports
/******/ 	return __webpack_require__(0);
/******/ })
/************************************************************************/
/******/ ([
/* 0 */
/***/ function(module, exports, __webpack_require__) {

	'use strict';

	var _promise = __webpack_require__(1);

	var _promise2 = _interopRequireDefault(_promise);

	var _classCallCheck2 = __webpack_require__(56);

	var _classCallCheck3 = _interopRequireDefault(_classCallCheck2);

	var _createClass2 = __webpack_require__(57);

	var _createClass3 = _interopRequireDefault(_createClass2);

	function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

	var EventEmitter = __webpack_require__(60).EventEmitter;
	var logger = __webpack_require__(61).create("orbit-db.Client");
	var PubSub = __webpack_require__(65);
	var CounterStore = __webpack_require__(118);
	var KeyValueStore = __webpack_require__(250);
	var EventStore = __webpack_require__(252);

	var OrbitDB = function () {
	  function OrbitDB(ipfs, options) {
	    (0, _classCallCheck3.default)(this, OrbitDB);

	    this._ipfs = ipfs;
	    this._pubsub = null;
	    this.user = null;
	    this.network = null;
	    this.events = new EventEmitter();
	    this.stores = {};
	  }

	  (0, _createClass3.default)(OrbitDB, [{
	    key: 'eventlog',
	    value: function eventlog(dbname, options) {
	      var _this = this;

	      if (!options) options = { subscribe: true };
	      var store = new EventStore(this._ipfs, dbname, options);
	      return this._subscribe(store, dbname, options.subscribe).then(function () {
	        return _this.stores[dbname] = store;
	      }).then(function () {
	        return store;
	      });
	    }
	  }, {
	    key: 'kvstore',
	    value: function kvstore(dbname, options) {
	      var _this2 = this;

	      if (!options) options = { subscribe: true };
	      var store = new KeyValueStore(this._ipfs, dbname, options);
	      return this._subscribe(store, dbname, options.subscribe).then(function () {
	        return _this2.stores[dbname] = store;
	      }).then(function () {
	        return store;
	      });
	    }
	  }, {
	    key: 'counter',
	    value: function counter(dbname, options) {
	      var _this3 = this;

	      if (!options) options = { subscribe: true };
	      var store = new CounterStore(this._ipfs, dbname, options);
	      return this._subscribe(store, dbname, options.subscribe).then(function () {
	        return _this3.stores[dbname] = store;
	      }).then(function () {
	        return store;
	      });
	    }
	  }, {
	    key: 'disconnect',
	    value: function disconnect() {
	      this._pubsub.disconnect();
	      this._store = {};
	      this.user = null;
	      this.network = null;
	    }
	  }, {
	    key: '_subscribe',
	    value: function _subscribe(store, dbname, subscribe, callback) {
	      var _this4 = this;

	      if (subscribe === undefined) subscribe = true;

	      return store.use(this.user.username).then(function (events) {
	        events.on('readable', _this4._onSync.bind(_this4));
	        events.on('data', _this4._onWrite.bind(_this4));
	        events.on('load', _this4._onLoad.bind(_this4));
	        events.on('close', _this4._onClose.bind(_this4));

	        if (subscribe) _this4._pubsub.subscribe(dbname, '', _this4._onMessage.bind(_this4));

	        return;
	      });
	    }
	  }, {
	    key: '_onMessage',
	    value: function _onMessage(dbname, message) {
	      var store = this.stores[dbname];
	      store.sync(message).catch(function (e) {
	        return logger.error(e.stack);
	      });
	    }
	  }, {
	    key: '_onWrite',
	    value: function _onWrite(dbname, hash) {
	      this._pubsub.publish(dbname, hash);
	      this.events.emit('data', dbname, hash);
	    }
	  }, {
	    key: '_onSync',
	    value: function _onSync(dbname, hash) {
	      this.events.emit('readable', dbname, hash);
	    }
	  }, {
	    key: '_onLoad',
	    value: function _onLoad(dbname, hash) {
	      this.events.emit('load', dbname, hash);
	    }
	  }, {
	    key: '_onClose',
	    value: function _onClose(dbname) {
	      this._pubsub.unsubscribe(dbname);
	      delete this.stores[dbname];
	      this.events.emit('closed', dbname);
	    }
	  }, {
	    key: '_connect',
	    value: function _connect(host, port, username, password, allowOffline) {
	      var _this5 = this;

	      return new _promise2.default(function (resolve, reject) {
	        if (allowOffline === undefined) allowOffline = false;

	        _this5._pubsub = new PubSub(_this5._ipfs);
	        _this5._pubsub.connect(host, port, username, password).then(function () {
	          logger.debug('Connected to Pubsub at \'' + host + ':' + port + '\'');
	          _this5.user = { username: username, id: username }; // TODO: user id from ipfs hash
	          _this5.network = { host: host, port: port, name: 'TODO: network name' };
	          resolve();
	        }).catch(function (e) {
	          logger.warn("Couldn't connect to Pubsub:", e.message);
	          if (!allowOffline) {
	            logger.debug("'allowOffline' set to false, terminating");
	            _this5._pubsub.disconnect();
	            reject(e);
	            return;
	          }
	          _this5.user = { username: username, id: username }; // TODO: user id from ipfs hash
	          _this5.network = { host: host, port: port, name: 'TODO: network name' };
	          resolve();
	        });
	      });
	    }
	  }]);
	  return OrbitDB;
	}();

	var OrbitClientFactory = function () {
	  function OrbitClientFactory() {
	    (0, _classCallCheck3.default)(this, OrbitClientFactory);
	  }

	  (0, _createClass3.default)(OrbitClientFactory, null, [{
	    key: 'connect',
	    value: function connect(host, port, username, password, ipfs, options) {
	      var createClient = function createClient(ipfs) {
	        return new _promise2.default(function (resolve, reject) {
	          var client = new OrbitDB(ipfs, options);
	          client._connect(host, port, username, password, options.allowOffline).then(function () {
	            return resolve(client);
	          }).catch(reject);
	        });
	      };

	      options = options ? options : {};

	      if (!ipfs) {
	        logger.error("IPFS instance not provided");
	        throw new Error("IPFS instance not provided");
	      }

	      return createClient(ipfs);
	    }
	  }]);
	  return OrbitClientFactory;
	}();

	module.exports = OrbitClientFactory;

/***/ },
/* 1 */
/***/ function(module, exports, __webpack_require__) {

	module.exports = { "default": __webpack_require__(2), __esModule: true };

/***/ },
/* 2 */
/***/ function(module, exports, __webpack_require__) {

	__webpack_require__(3);
	__webpack_require__(4);
	__webpack_require__(28);
	__webpack_require__(35);
	module.exports = __webpack_require__(12).Promise;

/***/ },
/* 3 */
/***/ function(module, exports) {

	

/***/ },
/* 4 */
/***/ function(module, exports, __webpack_require__) {

	'use strict';
	var $at  = __webpack_require__(5)(true);

	// 21.1.3.27 String.prototype[@@iterator]()
	__webpack_require__(8)(String, 'String', function(iterated){
	  this._t = String(iterated); // target
	  this._i = 0;                // next index
	// 21.1.5.2.1 %StringIteratorPrototype%.next()
	}, function(){
	  var O     = this._t
	    , index = this._i
	    , point;
	  if(index >= O.length)return {value: undefined, done: true};
	  point = $at(O, index);
	  this._i += point.length;
	  return {value: point, done: false};
	});

/***/ },
/* 5 */
/***/ function(module, exports, __webpack_require__) {

	var toInteger = __webpack_require__(6)
	  , defined   = __webpack_require__(7);
	// true  -> String#at
	// false -> String#codePointAt
	module.exports = function(TO_STRING){
	  return function(that, pos){
	    var s = String(defined(that))
	      , i = toInteger(pos)
	      , l = s.length
	      , a, b;
	    if(i < 0 || i >= l)return TO_STRING ? '' : undefined;
	    a = s.charCodeAt(i);
	    return a < 0xd800 || a > 0xdbff || i + 1 === l || (b = s.charCodeAt(i + 1)) < 0xdc00 || b > 0xdfff
	      ? TO_STRING ? s.charAt(i) : a
	      : TO_STRING ? s.slice(i, i + 2) : (a - 0xd800 << 10) + (b - 0xdc00) + 0x10000;
	  };
	};

/***/ },
/* 6 */
/***/ function(module, exports) {

	// 7.1.4 ToInteger
	var ceil  = Math.ceil
	  , floor = Math.floor;
	module.exports = function(it){
	  return isNaN(it = +it) ? 0 : (it > 0 ? floor : ceil)(it);
	};

/***/ },
/* 7 */
/***/ function(module, exports) {

	// 7.2.1 RequireObjectCoercible(argument)
	module.exports = function(it){
	  if(it == undefined)throw TypeError("Can't call method on  " + it);
	  return it;
	};

/***/ },
/* 8 */
/***/ function(module, exports, __webpack_require__) {

	'use strict';
	var LIBRARY        = __webpack_require__(9)
	  , $export        = __webpack_require__(10)
	  , redefine       = __webpack_require__(15)
	  , hide           = __webpack_require__(16)
	  , has            = __webpack_require__(21)
	  , Iterators      = __webpack_require__(22)
	  , $iterCreate    = __webpack_require__(23)
	  , setToStringTag = __webpack_require__(24)
	  , getProto       = __webpack_require__(17).getProto
	  , ITERATOR       = __webpack_require__(25)('iterator')
	  , BUGGY          = !([].keys && 'next' in [].keys()) // Safari has buggy iterators w/o `next`
	  , FF_ITERATOR    = '@@iterator'
	  , KEYS           = 'keys'
	  , VALUES         = 'values';

	var returnThis = function(){ return this; };

	module.exports = function(Base, NAME, Constructor, next, DEFAULT, IS_SET, FORCED){
	  $iterCreate(Constructor, NAME, next);
	  var getMethod = function(kind){
	    if(!BUGGY && kind in proto)return proto[kind];
	    switch(kind){
	      case KEYS: return function keys(){ return new Constructor(this, kind); };
	      case VALUES: return function values(){ return new Constructor(this, kind); };
	    } return function entries(){ return new Constructor(this, kind); };
	  };
	  var TAG        = NAME + ' Iterator'
	    , DEF_VALUES = DEFAULT == VALUES
	    , VALUES_BUG = false
	    , proto      = Base.prototype
	    , $native    = proto[ITERATOR] || proto[FF_ITERATOR] || DEFAULT && proto[DEFAULT]
	    , $default   = $native || getMethod(DEFAULT)
	    , methods, key;
	  // Fix native
	  if($native){
	    var IteratorPrototype = getProto($default.call(new Base));
	    // Set @@toStringTag to native iterators
	    setToStringTag(IteratorPrototype, TAG, true);
	    // FF fix
	    if(!LIBRARY && has(proto, FF_ITERATOR))hide(IteratorPrototype, ITERATOR, returnThis);
	    // fix Array#{values, @@iterator}.name in V8 / FF
	    if(DEF_VALUES && $native.name !== VALUES){
	      VALUES_BUG = true;
	      $default = function values(){ return $native.call(this); };
	    }
	  }
	  // Define iterator
	  if((!LIBRARY || FORCED) && (BUGGY || VALUES_BUG || !proto[ITERATOR])){
	    hide(proto, ITERATOR, $default);
	  }
	  // Plug for library
	  Iterators[NAME] = $default;
	  Iterators[TAG]  = returnThis;
	  if(DEFAULT){
	    methods = {
	      values:  DEF_VALUES  ? $default : getMethod(VALUES),
	      keys:    IS_SET      ? $default : getMethod(KEYS),
	      entries: !DEF_VALUES ? $default : getMethod('entries')
	    };
	    if(FORCED)for(key in methods){
	      if(!(key in proto))redefine(proto, key, methods[key]);
	    } else $export($export.P + $export.F * (BUGGY || VALUES_BUG), NAME, methods);
	  }
	  return methods;
	};

/***/ },
/* 9 */
/***/ function(module, exports) {

	module.exports = true;

/***/ },
/* 10 */
/***/ function(module, exports, __webpack_require__) {

	var global    = __webpack_require__(11)
	  , core      = __webpack_require__(12)
	  , ctx       = __webpack_require__(13)
	  , PROTOTYPE = 'prototype';

	var $export = function(type, name, source){
	  var IS_FORCED = type & $export.F
	    , IS_GLOBAL = type & $export.G
	    , IS_STATIC = type & $export.S
	    , IS_PROTO  = type & $export.P
	    , IS_BIND   = type & $export.B
	    , IS_WRAP   = type & $export.W
	    , exports   = IS_GLOBAL ? core : core[name] || (core[name] = {})
	    , target    = IS_GLOBAL ? global : IS_STATIC ? global[name] : (global[name] || {})[PROTOTYPE]
	    , key, own, out;
	  if(IS_GLOBAL)source = name;
	  for(key in source){
	    // contains in native
	    own = !IS_FORCED && target && key in target;
	    if(own && key in exports)continue;
	    // export native or passed
	    out = own ? target[key] : source[key];
	    // prevent global pollution for namespaces
	    exports[key] = IS_GLOBAL && typeof target[key] != 'function' ? source[key]
	    // bind timers to global for call from export context
	    : IS_BIND && own ? ctx(out, global)
	    // wrap global constructors for prevent change them in library
	    : IS_WRAP && target[key] == out ? (function(C){
	      var F = function(param){
	        return this instanceof C ? new C(param) : C(param);
	      };
	      F[PROTOTYPE] = C[PROTOTYPE];
	      return F;
	    // make static versions for prototype methods
	    })(out) : IS_PROTO && typeof out == 'function' ? ctx(Function.call, out) : out;
	    if(IS_PROTO)(exports[PROTOTYPE] || (exports[PROTOTYPE] = {}))[key] = out;
	  }
	};
	// type bitmap
	$export.F = 1;  // forced
	$export.G = 2;  // global
	$export.S = 4;  // static
	$export.P = 8;  // proto
	$export.B = 16; // bind
	$export.W = 32; // wrap
	module.exports = $export;

/***/ },
/* 11 */
/***/ function(module, exports) {

	// https://github.com/zloirock/core-js/issues/86#issuecomment-115759028
	var global = module.exports = typeof window != 'undefined' && window.Math == Math
	  ? window : typeof self != 'undefined' && self.Math == Math ? self : Function('return this')();
	if(typeof __g == 'number')__g = global; // eslint-disable-line no-undef

/***/ },
/* 12 */
/***/ function(module, exports) {

	var core = module.exports = {version: '1.2.6'};
	if(typeof __e == 'number')__e = core; // eslint-disable-line no-undef

/***/ },
/* 13 */
/***/ function(module, exports, __webpack_require__) {

	// optional / simple context binding
	var aFunction = __webpack_require__(14);
	module.exports = function(fn, that, length){
	  aFunction(fn);
	  if(that === undefined)return fn;
	  switch(length){
	    case 1: return function(a){
	      return fn.call(that, a);
	    };
	    case 2: return function(a, b){
	      return fn.call(that, a, b);
	    };
	    case 3: return function(a, b, c){
	      return fn.call(that, a, b, c);
	    };
	  }
	  return function(/* ...args */){
	    return fn.apply(that, arguments);
	  };
	};

/***/ },
/* 14 */
/***/ function(module, exports) {

	module.exports = function(it){
	  if(typeof it != 'function')throw TypeError(it + ' is not a function!');
	  return it;
	};

/***/ },
/* 15 */
/***/ function(module, exports, __webpack_require__) {

	module.exports = __webpack_require__(16);

/***/ },
/* 16 */
/***/ function(module, exports, __webpack_require__) {

	var $          = __webpack_require__(17)
	  , createDesc = __webpack_require__(18);
	module.exports = __webpack_require__(19) ? function(object, key, value){
	  return $.setDesc(object, key, createDesc(1, value));
	} : function(object, key, value){
	  object[key] = value;
	  return object;
	};

/***/ },
/* 17 */
/***/ function(module, exports) {

	var $Object = Object;
	module.exports = {
	  create:     $Object.create,
	  getProto:   $Object.getPrototypeOf,
	  isEnum:     {}.propertyIsEnumerable,
	  getDesc:    $Object.getOwnPropertyDescriptor,
	  setDesc:    $Object.defineProperty,
	  setDescs:   $Object.defineProperties,
	  getKeys:    $Object.keys,
	  getNames:   $Object.getOwnPropertyNames,
	  getSymbols: $Object.getOwnPropertySymbols,
	  each:       [].forEach
	};

/***/ },
/* 18 */
/***/ function(module, exports) {

	module.exports = function(bitmap, value){
	  return {
	    enumerable  : !(bitmap & 1),
	    configurable: !(bitmap & 2),
	    writable    : !(bitmap & 4),
	    value       : value
	  };
	};

/***/ },
/* 19 */
/***/ function(module, exports, __webpack_require__) {

	// Thank's IE8 for his funny defineProperty
	module.exports = !__webpack_require__(20)(function(){
	  return Object.defineProperty({}, 'a', {get: function(){ return 7; }}).a != 7;
	});

/***/ },
/* 20 */
/***/ function(module, exports) {

	module.exports = function(exec){
	  try {
	    return !!exec();
	  } catch(e){
	    return true;
	  }
	};

/***/ },
/* 21 */
/***/ function(module, exports) {

	var hasOwnProperty = {}.hasOwnProperty;
	module.exports = function(it, key){
	  return hasOwnProperty.call(it, key);
	};

/***/ },
/* 22 */
/***/ function(module, exports) {

	module.exports = {};

/***/ },
/* 23 */
/***/ function(module, exports, __webpack_require__) {

	'use strict';
	var $              = __webpack_require__(17)
	  , descriptor     = __webpack_require__(18)
	  , setToStringTag = __webpack_require__(24)
	  , IteratorPrototype = {};

	// 25.1.2.1.1 %IteratorPrototype%[@@iterator]()
	__webpack_require__(16)(IteratorPrototype, __webpack_require__(25)('iterator'), function(){ return this; });

	module.exports = function(Constructor, NAME, next){
	  Constructor.prototype = $.create(IteratorPrototype, {next: descriptor(1, next)});
	  setToStringTag(Constructor, NAME + ' Iterator');
	};

/***/ },
/* 24 */
/***/ function(module, exports, __webpack_require__) {

	var def = __webpack_require__(17).setDesc
	  , has = __webpack_require__(21)
	  , TAG = __webpack_require__(25)('toStringTag');

	module.exports = function(it, tag, stat){
	  if(it && !has(it = stat ? it : it.prototype, TAG))def(it, TAG, {configurable: true, value: tag});
	};

/***/ },
/* 25 */
/***/ function(module, exports, __webpack_require__) {

	var store  = __webpack_require__(26)('wks')
	  , uid    = __webpack_require__(27)
	  , Symbol = __webpack_require__(11).Symbol;
	module.exports = function(name){
	  return store[name] || (store[name] =
	    Symbol && Symbol[name] || (Symbol || uid)('Symbol.' + name));
	};

/***/ },
/* 26 */
/***/ function(module, exports, __webpack_require__) {

	var global = __webpack_require__(11)
	  , SHARED = '__core-js_shared__'
	  , store  = global[SHARED] || (global[SHARED] = {});
	module.exports = function(key){
	  return store[key] || (store[key] = {});
	};

/***/ },
/* 27 */
/***/ function(module, exports) {

	var id = 0
	  , px = Math.random();
	module.exports = function(key){
	  return 'Symbol('.concat(key === undefined ? '' : key, ')_', (++id + px).toString(36));
	};

/***/ },
/* 28 */
/***/ function(module, exports, __webpack_require__) {

	__webpack_require__(29);
	var Iterators = __webpack_require__(22);
	Iterators.NodeList = Iterators.HTMLCollection = Iterators.Array;

/***/ },
/* 29 */
/***/ function(module, exports, __webpack_require__) {

	'use strict';
	var addToUnscopables = __webpack_require__(30)
	  , step             = __webpack_require__(31)
	  , Iterators        = __webpack_require__(22)
	  , toIObject        = __webpack_require__(32);

	// 22.1.3.4 Array.prototype.entries()
	// 22.1.3.13 Array.prototype.keys()
	// 22.1.3.29 Array.prototype.values()
	// 22.1.3.30 Array.prototype[@@iterator]()
	module.exports = __webpack_require__(8)(Array, 'Array', function(iterated, kind){
	  this._t = toIObject(iterated); // target
	  this._i = 0;                   // next index
	  this._k = kind;                // kind
	// 22.1.5.2.1 %ArrayIteratorPrototype%.next()
	}, function(){
	  var O     = this._t
	    , kind  = this._k
	    , index = this._i++;
	  if(!O || index >= O.length){
	    this._t = undefined;
	    return step(1);
	  }
	  if(kind == 'keys'  )return step(0, index);
	  if(kind == 'values')return step(0, O[index]);
	  return step(0, [index, O[index]]);
	}, 'values');

	// argumentsList[@@iterator] is %ArrayProto_values% (9.4.4.6, 9.4.4.7)
	Iterators.Arguments = Iterators.Array;

	addToUnscopables('keys');
	addToUnscopables('values');
	addToUnscopables('entries');

/***/ },
/* 30 */
/***/ function(module, exports) {

	module.exports = function(){ /* empty */ };

/***/ },
/* 31 */
/***/ function(module, exports) {

	module.exports = function(done, value){
	  return {value: value, done: !!done};
	};

/***/ },
/* 32 */
/***/ function(module, exports, __webpack_require__) {

	// to indexed object, toObject with fallback for non-array-like ES3 strings
	var IObject = __webpack_require__(33)
	  , defined = __webpack_require__(7);
	module.exports = function(it){
	  return IObject(defined(it));
	};

/***/ },
/* 33 */
/***/ function(module, exports, __webpack_require__) {

	// fallback for non-array-like ES3 and non-enumerable old V8 strings
	var cof = __webpack_require__(34);
	module.exports = Object('z').propertyIsEnumerable(0) ? Object : function(it){
	  return cof(it) == 'String' ? it.split('') : Object(it);
	};

/***/ },
/* 34 */
/***/ function(module, exports) {

	var toString = {}.toString;

	module.exports = function(it){
	  return toString.call(it).slice(8, -1);
	};

/***/ },
/* 35 */
/***/ function(module, exports, __webpack_require__) {

	'use strict';
	var $          = __webpack_require__(17)
	  , LIBRARY    = __webpack_require__(9)
	  , global     = __webpack_require__(11)
	  , ctx        = __webpack_require__(13)
	  , classof    = __webpack_require__(36)
	  , $export    = __webpack_require__(10)
	  , isObject   = __webpack_require__(37)
	  , anObject   = __webpack_require__(38)
	  , aFunction  = __webpack_require__(14)
	  , strictNew  = __webpack_require__(39)
	  , forOf      = __webpack_require__(40)
	  , setProto   = __webpack_require__(45).set
	  , same       = __webpack_require__(46)
	  , SPECIES    = __webpack_require__(25)('species')
	  , speciesConstructor = __webpack_require__(47)
	  , asap       = __webpack_require__(48)
	  , PROMISE    = 'Promise'
	  , process    = global.process
	  , isNode     = classof(process) == 'process'
	  , P          = global[PROMISE]
	  , Wrapper;

	var testResolve = function(sub){
	  var test = new P(function(){});
	  if(sub)test.constructor = Object;
	  return P.resolve(test) === test;
	};

	var USE_NATIVE = function(){
	  var works = false;
	  function P2(x){
	    var self = new P(x);
	    setProto(self, P2.prototype);
	    return self;
	  }
	  try {
	    works = P && P.resolve && testResolve();
	    setProto(P2, P);
	    P2.prototype = $.create(P.prototype, {constructor: {value: P2}});
	    // actual Firefox has broken subclass support, test that
	    if(!(P2.resolve(5).then(function(){}) instanceof P2)){
	      works = false;
	    }
	    // actual V8 bug, https://code.google.com/p/v8/issues/detail?id=4162
	    if(works && __webpack_require__(19)){
	      var thenableThenGotten = false;
	      P.resolve($.setDesc({}, 'then', {
	        get: function(){ thenableThenGotten = true; }
	      }));
	      works = thenableThenGotten;
	    }
	  } catch(e){ works = false; }
	  return works;
	}();

	// helpers
	var sameConstructor = function(a, b){
	  // library wrapper special case
	  if(LIBRARY && a === P && b === Wrapper)return true;
	  return same(a, b);
	};
	var getConstructor = function(C){
	  var S = anObject(C)[SPECIES];
	  return S != undefined ? S : C;
	};
	var isThenable = function(it){
	  var then;
	  return isObject(it) && typeof (then = it.then) == 'function' ? then : false;
	};
	var PromiseCapability = function(C){
	  var resolve, reject;
	  this.promise = new C(function($$resolve, $$reject){
	    if(resolve !== undefined || reject !== undefined)throw TypeError('Bad Promise constructor');
	    resolve = $$resolve;
	    reject  = $$reject;
	  });
	  this.resolve = aFunction(resolve),
	  this.reject  = aFunction(reject)
	};
	var perform = function(exec){
	  try {
	    exec();
	  } catch(e){
	    return {error: e};
	  }
	};
	var notify = function(record, isReject){
	  if(record.n)return;
	  record.n = true;
	  var chain = record.c;
	  asap(function(){
	    var value = record.v
	      , ok    = record.s == 1
	      , i     = 0;
	    var run = function(reaction){
	      var handler = ok ? reaction.ok : reaction.fail
	        , resolve = reaction.resolve
	        , reject  = reaction.reject
	        , result, then;
	      try {
	        if(handler){
	          if(!ok)record.h = true;
	          result = handler === true ? value : handler(value);
	          if(result === reaction.promise){
	            reject(TypeError('Promise-chain cycle'));
	          } else if(then = isThenable(result)){
	            then.call(result, resolve, reject);
	          } else resolve(result);
	        } else reject(value);
	      } catch(e){
	        reject(e);
	      }
	    };
	    while(chain.length > i)run(chain[i++]); // variable length - can't use forEach
	    chain.length = 0;
	    record.n = false;
	    if(isReject)setTimeout(function(){
	      var promise = record.p
	        , handler, console;
	      if(isUnhandled(promise)){
	        if(isNode){
	          process.emit('unhandledRejection', value, promise);
	        } else if(handler = global.onunhandledrejection){
	          handler({promise: promise, reason: value});
	        } else if((console = global.console) && console.error){
	          console.error('Unhandled promise rejection', value);
	        }
	      } record.a = undefined;
	    }, 1);
	  });
	};
	var isUnhandled = function(promise){
	  var record = promise._d
	    , chain  = record.a || record.c
	    , i      = 0
	    , reaction;
	  if(record.h)return false;
	  while(chain.length > i){
	    reaction = chain[i++];
	    if(reaction.fail || !isUnhandled(reaction.promise))return false;
	  } return true;
	};
	var $reject = function(value){
	  var record = this;
	  if(record.d)return;
	  record.d = true;
	  record = record.r || record; // unwrap
	  record.v = value;
	  record.s = 2;
	  record.a = record.c.slice();
	  notify(record, true);
	};
	var $resolve = function(value){
	  var record = this
	    , then;
	  if(record.d)return;
	  record.d = true;
	  record = record.r || record; // unwrap
	  try {
	    if(record.p === value)throw TypeError("Promise can't be resolved itself");
	    if(then = isThenable(value)){
	      asap(function(){
	        var wrapper = {r: record, d: false}; // wrap
	        try {
	          then.call(value, ctx($resolve, wrapper, 1), ctx($reject, wrapper, 1));
	        } catch(e){
	          $reject.call(wrapper, e);
	        }
	      });
	    } else {
	      record.v = value;
	      record.s = 1;
	      notify(record, false);
	    }
	  } catch(e){
	    $reject.call({r: record, d: false}, e); // wrap
	  }
	};

	// constructor polyfill
	if(!USE_NATIVE){
	  // 25.4.3.1 Promise(executor)
	  P = function Promise(executor){
	    aFunction(executor);
	    var record = this._d = {
	      p: strictNew(this, P, PROMISE),         // <- promise
	      c: [],                                  // <- awaiting reactions
	      a: undefined,                           // <- checked in isUnhandled reactions
	      s: 0,                                   // <- state
	      d: false,                               // <- done
	      v: undefined,                           // <- value
	      h: false,                               // <- handled rejection
	      n: false                                // <- notify
	    };
	    try {
	      executor(ctx($resolve, record, 1), ctx($reject, record, 1));
	    } catch(err){
	      $reject.call(record, err);
	    }
	  };
	  __webpack_require__(53)(P.prototype, {
	    // 25.4.5.3 Promise.prototype.then(onFulfilled, onRejected)
	    then: function then(onFulfilled, onRejected){
	      var reaction = new PromiseCapability(speciesConstructor(this, P))
	        , promise  = reaction.promise
	        , record   = this._d;
	      reaction.ok   = typeof onFulfilled == 'function' ? onFulfilled : true;
	      reaction.fail = typeof onRejected == 'function' && onRejected;
	      record.c.push(reaction);
	      if(record.a)record.a.push(reaction);
	      if(record.s)notify(record, false);
	      return promise;
	    },
	    // 25.4.5.1 Promise.prototype.catch(onRejected)
	    'catch': function(onRejected){
	      return this.then(undefined, onRejected);
	    }
	  });
	}

	$export($export.G + $export.W + $export.F * !USE_NATIVE, {Promise: P});
	__webpack_require__(24)(P, PROMISE);
	__webpack_require__(54)(PROMISE);
	Wrapper = __webpack_require__(12)[PROMISE];

	// statics
	$export($export.S + $export.F * !USE_NATIVE, PROMISE, {
	  // 25.4.4.5 Promise.reject(r)
	  reject: function reject(r){
	    var capability = new PromiseCapability(this)
	      , $$reject   = capability.reject;
	    $$reject(r);
	    return capability.promise;
	  }
	});
	$export($export.S + $export.F * (!USE_NATIVE || testResolve(true)), PROMISE, {
	  // 25.4.4.6 Promise.resolve(x)
	  resolve: function resolve(x){
	    // instanceof instead of internal slot check because we should fix it without replacement native Promise core
	    if(x instanceof P && sameConstructor(x.constructor, this))return x;
	    var capability = new PromiseCapability(this)
	      , $$resolve  = capability.resolve;
	    $$resolve(x);
	    return capability.promise;
	  }
	});
	$export($export.S + $export.F * !(USE_NATIVE && __webpack_require__(55)(function(iter){
	  P.all(iter)['catch'](function(){});
	})), PROMISE, {
	  // 25.4.4.1 Promise.all(iterable)
	  all: function all(iterable){
	    var C          = getConstructor(this)
	      , capability = new PromiseCapability(C)
	      , resolve    = capability.resolve
	      , reject     = capability.reject
	      , values     = [];
	    var abrupt = perform(function(){
	      forOf(iterable, false, values.push, values);
	      var remaining = values.length
	        , results   = Array(remaining);
	      if(remaining)$.each.call(values, function(promise, index){
	        var alreadyCalled = false;
	        C.resolve(promise).then(function(value){
	          if(alreadyCalled)return;
	          alreadyCalled = true;
	          results[index] = value;
	          --remaining || resolve(results);
	        }, reject);
	      });
	      else resolve(results);
	    });
	    if(abrupt)reject(abrupt.error);
	    return capability.promise;
	  },
	  // 25.4.4.4 Promise.race(iterable)
	  race: function race(iterable){
	    var C          = getConstructor(this)
	      , capability = new PromiseCapability(C)
	      , reject     = capability.reject;
	    var abrupt = perform(function(){
	      forOf(iterable, false, function(promise){
	        C.resolve(promise).then(capability.resolve, reject);
	      });
	    });
	    if(abrupt)reject(abrupt.error);
	    return capability.promise;
	  }
	});

/***/ },
/* 36 */
/***/ function(module, exports, __webpack_require__) {

	// getting tag from 19.1.3.6 Object.prototype.toString()
	var cof = __webpack_require__(34)
	  , TAG = __webpack_require__(25)('toStringTag')
	  // ES3 wrong here
	  , ARG = cof(function(){ return arguments; }()) == 'Arguments';

	module.exports = function(it){
	  var O, T, B;
	  return it === undefined ? 'Undefined' : it === null ? 'Null'
	    // @@toStringTag case
	    : typeof (T = (O = Object(it))[TAG]) == 'string' ? T
	    // builtinTag case
	    : ARG ? cof(O)
	    // ES3 arguments fallback
	    : (B = cof(O)) == 'Object' && typeof O.callee == 'function' ? 'Arguments' : B;
	};

/***/ },
/* 37 */
/***/ function(module, exports) {

	module.exports = function(it){
	  return typeof it === 'object' ? it !== null : typeof it === 'function';
	};

/***/ },
/* 38 */
/***/ function(module, exports, __webpack_require__) {

	var isObject = __webpack_require__(37);
	module.exports = function(it){
	  if(!isObject(it))throw TypeError(it + ' is not an object!');
	  return it;
	};

/***/ },
/* 39 */
/***/ function(module, exports) {

	module.exports = function(it, Constructor, name){
	  if(!(it instanceof Constructor))throw TypeError(name + ": use the 'new' operator!");
	  return it;
	};

/***/ },
/* 40 */
/***/ function(module, exports, __webpack_require__) {

	var ctx         = __webpack_require__(13)
	  , call        = __webpack_require__(41)
	  , isArrayIter = __webpack_require__(42)
	  , anObject    = __webpack_require__(38)
	  , toLength    = __webpack_require__(43)
	  , getIterFn   = __webpack_require__(44);
	module.exports = function(iterable, entries, fn, that){
	  var iterFn = getIterFn(iterable)
	    , f      = ctx(fn, that, entries ? 2 : 1)
	    , index  = 0
	    , length, step, iterator;
	  if(typeof iterFn != 'function')throw TypeError(iterable + ' is not iterable!');
	  // fast case for arrays with default iterator
	  if(isArrayIter(iterFn))for(length = toLength(iterable.length); length > index; index++){
	    entries ? f(anObject(step = iterable[index])[0], step[1]) : f(iterable[index]);
	  } else for(iterator = iterFn.call(iterable); !(step = iterator.next()).done; ){
	    call(iterator, f, step.value, entries);
	  }
	};

/***/ },
/* 41 */
/***/ function(module, exports, __webpack_require__) {

	// call something on iterator step with safe closing on error
	var anObject = __webpack_require__(38);
	module.exports = function(iterator, fn, value, entries){
	  try {
	    return entries ? fn(anObject(value)[0], value[1]) : fn(value);
	  // 7.4.6 IteratorClose(iterator, completion)
	  } catch(e){
	    var ret = iterator['return'];
	    if(ret !== undefined)anObject(ret.call(iterator));
	    throw e;
	  }
	};

/***/ },
/* 42 */
/***/ function(module, exports, __webpack_require__) {

	// check on default Array iterator
	var Iterators  = __webpack_require__(22)
	  , ITERATOR   = __webpack_require__(25)('iterator')
	  , ArrayProto = Array.prototype;

	module.exports = function(it){
	  return it !== undefined && (Iterators.Array === it || ArrayProto[ITERATOR] === it);
	};

/***/ },
/* 43 */
/***/ function(module, exports, __webpack_require__) {

	// 7.1.15 ToLength
	var toInteger = __webpack_require__(6)
	  , min       = Math.min;
	module.exports = function(it){
	  return it > 0 ? min(toInteger(it), 0x1fffffffffffff) : 0; // pow(2, 53) - 1 == 9007199254740991
	};

/***/ },
/* 44 */
/***/ function(module, exports, __webpack_require__) {

	var classof   = __webpack_require__(36)
	  , ITERATOR  = __webpack_require__(25)('iterator')
	  , Iterators = __webpack_require__(22);
	module.exports = __webpack_require__(12).getIteratorMethod = function(it){
	  if(it != undefined)return it[ITERATOR]
	    || it['@@iterator']
	    || Iterators[classof(it)];
	};

/***/ },
/* 45 */
/***/ function(module, exports, __webpack_require__) {

	// Works with __proto__ only. Old v8 can't work with null proto objects.
	/* eslint-disable no-proto */
	var getDesc  = __webpack_require__(17).getDesc
	  , isObject = __webpack_require__(37)
	  , anObject = __webpack_require__(38);
	var check = function(O, proto){
	  anObject(O);
	  if(!isObject(proto) && proto !== null)throw TypeError(proto + ": can't set as prototype!");
	};
	module.exports = {
	  set: Object.setPrototypeOf || ('__proto__' in {} ? // eslint-disable-line
	    function(test, buggy, set){
	      try {
	        set = __webpack_require__(13)(Function.call, getDesc(Object.prototype, '__proto__').set, 2);
	        set(test, []);
	        buggy = !(test instanceof Array);
	      } catch(e){ buggy = true; }
	      return function setPrototypeOf(O, proto){
	        check(O, proto);
	        if(buggy)O.__proto__ = proto;
	        else set(O, proto);
	        return O;
	      };
	    }({}, false) : undefined),
	  check: check
	};

/***/ },
/* 46 */
/***/ function(module, exports) {

	// 7.2.9 SameValue(x, y)
	module.exports = Object.is || function is(x, y){
	  return x === y ? x !== 0 || 1 / x === 1 / y : x != x && y != y;
	};

/***/ },
/* 47 */
/***/ function(module, exports, __webpack_require__) {

	// 7.3.20 SpeciesConstructor(O, defaultConstructor)
	var anObject  = __webpack_require__(38)
	  , aFunction = __webpack_require__(14)
	  , SPECIES   = __webpack_require__(25)('species');
	module.exports = function(O, D){
	  var C = anObject(O).constructor, S;
	  return C === undefined || (S = anObject(C)[SPECIES]) == undefined ? D : aFunction(S);
	};

/***/ },
/* 48 */
/***/ function(module, exports, __webpack_require__) {

	var global    = __webpack_require__(11)
	  , macrotask = __webpack_require__(49).set
	  , Observer  = global.MutationObserver || global.WebKitMutationObserver
	  , process   = global.process
	  , Promise   = global.Promise
	  , isNode    = __webpack_require__(34)(process) == 'process'
	  , head, last, notify;

	var flush = function(){
	  var parent, domain, fn;
	  if(isNode && (parent = process.domain)){
	    process.domain = null;
	    parent.exit();
	  }
	  while(head){
	    domain = head.domain;
	    fn     = head.fn;
	    if(domain)domain.enter();
	    fn(); // <- currently we use it only for Promise - try / catch not required
	    if(domain)domain.exit();
	    head = head.next;
	  } last = undefined;
	  if(parent)parent.enter();
	};

	// Node.js
	if(isNode){
	  notify = function(){
	    process.nextTick(flush);
	  };
	// browsers with MutationObserver
	} else if(Observer){
	  var toggle = 1
	    , node   = document.createTextNode('');
	  new Observer(flush).observe(node, {characterData: true}); // eslint-disable-line no-new
	  notify = function(){
	    node.data = toggle = -toggle;
	  };
	// environments with maybe non-completely correct, but existent Promise
	} else if(Promise && Promise.resolve){
	  notify = function(){
	    Promise.resolve().then(flush);
	  };
	// for other environments - macrotask based on:
	// - setImmediate
	// - MessageChannel
	// - window.postMessag
	// - onreadystatechange
	// - setTimeout
	} else {
	  notify = function(){
	    // strange IE + webpack dev server bug - use .call(global)
	    macrotask.call(global, flush);
	  };
	}

	module.exports = function asap(fn){
	  var task = {fn: fn, next: undefined, domain: isNode && process.domain};
	  if(last)last.next = task;
	  if(!head){
	    head = task;
	    notify();
	  } last = task;
	};

/***/ },
/* 49 */
/***/ function(module, exports, __webpack_require__) {

	var ctx                = __webpack_require__(13)
	  , invoke             = __webpack_require__(50)
	  , html               = __webpack_require__(51)
	  , cel                = __webpack_require__(52)
	  , global             = __webpack_require__(11)
	  , process            = global.process
	  , setTask            = global.setImmediate
	  , clearTask          = global.clearImmediate
	  , MessageChannel     = global.MessageChannel
	  , counter            = 0
	  , queue              = {}
	  , ONREADYSTATECHANGE = 'onreadystatechange'
	  , defer, channel, port;
	var run = function(){
	  var id = +this;
	  if(queue.hasOwnProperty(id)){
	    var fn = queue[id];
	    delete queue[id];
	    fn();
	  }
	};
	var listner = function(event){
	  run.call(event.data);
	};
	// Node.js 0.9+ & IE10+ has setImmediate, otherwise:
	if(!setTask || !clearTask){
	  setTask = function setImmediate(fn){
	    var args = [], i = 1;
	    while(arguments.length > i)args.push(arguments[i++]);
	    queue[++counter] = function(){
	      invoke(typeof fn == 'function' ? fn : Function(fn), args);
	    };
	    defer(counter);
	    return counter;
	  };
	  clearTask = function clearImmediate(id){
	    delete queue[id];
	  };
	  // Node.js 0.8-
	  if(__webpack_require__(34)(process) == 'process'){
	    defer = function(id){
	      process.nextTick(ctx(run, id, 1));
	    };
	  // Browsers with MessageChannel, includes WebWorkers
	  } else if(MessageChannel){
	    channel = new MessageChannel;
	    port    = channel.port2;
	    channel.port1.onmessage = listner;
	    defer = ctx(port.postMessage, port, 1);
	  // Browsers with postMessage, skip WebWorkers
	  // IE8 has postMessage, but it's sync & typeof its postMessage is 'object'
	  } else if(global.addEventListener && typeof postMessage == 'function' && !global.importScripts){
	    defer = function(id){
	      global.postMessage(id + '', '*');
	    };
	    global.addEventListener('message', listner, false);
	  // IE8-
	  } else if(ONREADYSTATECHANGE in cel('script')){
	    defer = function(id){
	      html.appendChild(cel('script'))[ONREADYSTATECHANGE] = function(){
	        html.removeChild(this);
	        run.call(id);
	      };
	    };
	  // Rest old browsers
	  } else {
	    defer = function(id){
	      setTimeout(ctx(run, id, 1), 0);
	    };
	  }
	}
	module.exports = {
	  set:   setTask,
	  clear: clearTask
	};

/***/ },
/* 50 */
/***/ function(module, exports) {

	// fast apply, http://jsperf.lnkit.com/fast-apply/5
	module.exports = function(fn, args, that){
	  var un = that === undefined;
	  switch(args.length){
	    case 0: return un ? fn()
	                      : fn.call(that);
	    case 1: return un ? fn(args[0])
	                      : fn.call(that, args[0]);
	    case 2: return un ? fn(args[0], args[1])
	                      : fn.call(that, args[0], args[1]);
	    case 3: return un ? fn(args[0], args[1], args[2])
	                      : fn.call(that, args[0], args[1], args[2]);
	    case 4: return un ? fn(args[0], args[1], args[2], args[3])
	                      : fn.call(that, args[0], args[1], args[2], args[3]);
	  } return              fn.apply(that, args);
	};

/***/ },
/* 51 */
/***/ function(module, exports, __webpack_require__) {

	module.exports = __webpack_require__(11).document && document.documentElement;

/***/ },
/* 52 */
/***/ function(module, exports, __webpack_require__) {

	var isObject = __webpack_require__(37)
	  , document = __webpack_require__(11).document
	  // in old IE typeof document.createElement is 'object'
	  , is = isObject(document) && isObject(document.createElement);
	module.exports = function(it){
	  return is ? document.createElement(it) : {};
	};

/***/ },
/* 53 */
/***/ function(module, exports, __webpack_require__) {

	var redefine = __webpack_require__(15);
	module.exports = function(target, src){
	  for(var key in src)redefine(target, key, src[key]);
	  return target;
	};

/***/ },
/* 54 */
/***/ function(module, exports, __webpack_require__) {

	'use strict';
	var core        = __webpack_require__(12)
	  , $           = __webpack_require__(17)
	  , DESCRIPTORS = __webpack_require__(19)
	  , SPECIES     = __webpack_require__(25)('species');

	module.exports = function(KEY){
	  var C = core[KEY];
	  if(DESCRIPTORS && C && !C[SPECIES])$.setDesc(C, SPECIES, {
	    configurable: true,
	    get: function(){ return this; }
	  });
	};

/***/ },
/* 55 */
/***/ function(module, exports, __webpack_require__) {

	var ITERATOR     = __webpack_require__(25)('iterator')
	  , SAFE_CLOSING = false;

	try {
	  var riter = [7][ITERATOR]();
	  riter['return'] = function(){ SAFE_CLOSING = true; };
	  Array.from(riter, function(){ throw 2; });
	} catch(e){ /* empty */ }

	module.exports = function(exec, skipClosing){
	  if(!skipClosing && !SAFE_CLOSING)return false;
	  var safe = false;
	  try {
	    var arr  = [7]
	      , iter = arr[ITERATOR]();
	    iter.next = function(){ safe = true; };
	    arr[ITERATOR] = function(){ return iter; };
	    exec(arr);
	  } catch(e){ /* empty */ }
	  return safe;
	};

/***/ },
/* 56 */
/***/ function(module, exports) {

	"use strict";

	exports.__esModule = true;

	exports.default = function (instance, Constructor) {
	  if (!(instance instanceof Constructor)) {
	    throw new TypeError("Cannot call a class as a function");
	  }
	};

/***/ },
/* 57 */
/***/ function(module, exports, __webpack_require__) {

	"use strict";

	exports.__esModule = true;

	var _defineProperty = __webpack_require__(58);

	var _defineProperty2 = _interopRequireDefault(_defineProperty);

	function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

	exports.default = function () {
	  function defineProperties(target, props) {
	    for (var i = 0; i < props.length; i++) {
	      var descriptor = props[i];
	      descriptor.enumerable = descriptor.enumerable || false;
	      descriptor.configurable = true;
	      if ("value" in descriptor) descriptor.writable = true;
	      (0, _defineProperty2.default)(target, descriptor.key, descriptor);
	    }
	  }

	  return function (Constructor, protoProps, staticProps) {
	    if (protoProps) defineProperties(Constructor.prototype, protoProps);
	    if (staticProps) defineProperties(Constructor, staticProps);
	    return Constructor;
	  };
	}();

/***/ },
/* 58 */
/***/ function(module, exports, __webpack_require__) {

	module.exports = { "default": __webpack_require__(59), __esModule: true };

/***/ },
/* 59 */
/***/ function(module, exports, __webpack_require__) {

	var $ = __webpack_require__(17);
	module.exports = function defineProperty(it, key, desc){
	  return $.setDesc(it, key, desc);
	};

/***/ },
/* 60 */
/***/ function(module, exports) {

	// Copyright Joyent, Inc. and other Node contributors.
	//
	// Permission is hereby granted, free of charge, to any person obtaining a
	// copy of this software and associated documentation files (the
	// "Software"), to deal in the Software without restriction, including
	// without limitation the rights to use, copy, modify, merge, publish,
	// distribute, sublicense, and/or sell copies of the Software, and to permit
	// persons to whom the Software is furnished to do so, subject to the
	// following conditions:
	//
	// The above copyright notice and this permission notice shall be included
	// in all copies or substantial portions of the Software.
	//
	// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
	// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
	// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
	// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
	// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
	// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
	// USE OR OTHER DEALINGS IN THE SOFTWARE.

	function EventEmitter() {
	  this._events = this._events || {};
	  this._maxListeners = this._maxListeners || undefined;
	}
	module.exports = EventEmitter;

	// Backwards-compat with node 0.10.x
	EventEmitter.EventEmitter = EventEmitter;

	EventEmitter.prototype._events = undefined;
	EventEmitter.prototype._maxListeners = undefined;

	// By default EventEmitters will print a warning if more than 10 listeners are
	// added to it. This is a useful default which helps finding memory leaks.
	EventEmitter.defaultMaxListeners = 10;

	// Obviously not all Emitters should be limited to 10. This function allows
	// that to be increased. Set to zero for unlimited.
	EventEmitter.prototype.setMaxListeners = function(n) {
	  if (!isNumber(n) || n < 0 || isNaN(n))
	    throw TypeError('n must be a positive number');
	  this._maxListeners = n;
	  return this;
	};

	EventEmitter.prototype.emit = function(type) {
	  var er, handler, len, args, i, listeners;

	  if (!this._events)
	    this._events = {};

	  // If there is no 'error' event listener then throw.
	  if (type === 'error') {
	    if (!this._events.error ||
	        (isObject(this._events.error) && !this._events.error.length)) {
	      er = arguments[1];
	      if (er instanceof Error) {
	        throw er; // Unhandled 'error' event
	      }
	      throw TypeError('Uncaught, unspecified "error" event.');
	    }
	  }

	  handler = this._events[type];

	  if (isUndefined(handler))
	    return false;

	  if (isFunction(handler)) {
	    switch (arguments.length) {
	      // fast cases
	      case 1:
	        handler.call(this);
	        break;
	      case 2:
	        handler.call(this, arguments[1]);
	        break;
	      case 3:
	        handler.call(this, arguments[1], arguments[2]);
	        break;
	      // slower
	      default:
	        args = Array.prototype.slice.call(arguments, 1);
	        handler.apply(this, args);
	    }
	  } else if (isObject(handler)) {
	    args = Array.prototype.slice.call(arguments, 1);
	    listeners = handler.slice();
	    len = listeners.length;
	    for (i = 0; i < len; i++)
	      listeners[i].apply(this, args);
	  }

	  return true;
	};

	EventEmitter.prototype.addListener = function(type, listener) {
	  var m;

	  if (!isFunction(listener))
	    throw TypeError('listener must be a function');

	  if (!this._events)
	    this._events = {};

	  // To avoid recursion in the case that type === "newListener"! Before
	  // adding it to the listeners, first emit "newListener".
	  if (this._events.newListener)
	    this.emit('newListener', type,
	              isFunction(listener.listener) ?
	              listener.listener : listener);

	  if (!this._events[type])
	    // Optimize the case of one listener. Don't need the extra array object.
	    this._events[type] = listener;
	  else if (isObject(this._events[type]))
	    // If we've already got an array, just append.
	    this._events[type].push(listener);
	  else
	    // Adding the second element, need to change to array.
	    this._events[type] = [this._events[type], listener];

	  // Check for listener leak
	  if (isObject(this._events[type]) && !this._events[type].warned) {
	    if (!isUndefined(this._maxListeners)) {
	      m = this._maxListeners;
	    } else {
	      m = EventEmitter.defaultMaxListeners;
	    }

	    if (m && m > 0 && this._events[type].length > m) {
	      this._events[type].warned = true;
	      console.error('(node) warning: possible EventEmitter memory ' +
	                    'leak detected. %d listeners added. ' +
	                    'Use emitter.setMaxListeners() to increase limit.',
	                    this._events[type].length);
	      if (typeof console.trace === 'function') {
	        // not supported in IE 10
	        console.trace();
	      }
	    }
	  }

	  return this;
	};

	EventEmitter.prototype.on = EventEmitter.prototype.addListener;

	EventEmitter.prototype.once = function(type, listener) {
	  if (!isFunction(listener))
	    throw TypeError('listener must be a function');

	  var fired = false;

	  function g() {
	    this.removeListener(type, g);

	    if (!fired) {
	      fired = true;
	      listener.apply(this, arguments);
	    }
	  }

	  g.listener = listener;
	  this.on(type, g);

	  return this;
	};

	// emits a 'removeListener' event iff the listener was removed
	EventEmitter.prototype.removeListener = function(type, listener) {
	  var list, position, length, i;

	  if (!isFunction(listener))
	    throw TypeError('listener must be a function');

	  if (!this._events || !this._events[type])
	    return this;

	  list = this._events[type];
	  length = list.length;
	  position = -1;

	  if (list === listener ||
	      (isFunction(list.listener) && list.listener === listener)) {
	    delete this._events[type];
	    if (this._events.removeListener)
	      this.emit('removeListener', type, listener);

	  } else if (isObject(list)) {
	    for (i = length; i-- > 0;) {
	      if (list[i] === listener ||
	          (list[i].listener && list[i].listener === listener)) {
	        position = i;
	        break;
	      }
	    }

	    if (position < 0)
	      return this;

	    if (list.length === 1) {
	      list.length = 0;
	      delete this._events[type];
	    } else {
	      list.splice(position, 1);
	    }

	    if (this._events.removeListener)
	      this.emit('removeListener', type, listener);
	  }

	  return this;
	};

	EventEmitter.prototype.removeAllListeners = function(type) {
	  var key, listeners;

	  if (!this._events)
	    return this;

	  // not listening for removeListener, no need to emit
	  if (!this._events.removeListener) {
	    if (arguments.length === 0)
	      this._events = {};
	    else if (this._events[type])
	      delete this._events[type];
	    return this;
	  }

	  // emit removeListener for all listeners on all events
	  if (arguments.length === 0) {
	    for (key in this._events) {
	      if (key === 'removeListener') continue;
	      this.removeAllListeners(key);
	    }
	    this.removeAllListeners('removeListener');
	    this._events = {};
	    return this;
	  }

	  listeners = this._events[type];

	  if (isFunction(listeners)) {
	    this.removeListener(type, listeners);
	  } else if (listeners) {
	    // LIFO order
	    while (listeners.length)
	      this.removeListener(type, listeners[listeners.length - 1]);
	  }
	  delete this._events[type];

	  return this;
	};

	EventEmitter.prototype.listeners = function(type) {
	  var ret;
	  if (!this._events || !this._events[type])
	    ret = [];
	  else if (isFunction(this._events[type]))
	    ret = [this._events[type]];
	  else
	    ret = this._events[type].slice();
	  return ret;
	};

	EventEmitter.prototype.listenerCount = function(type) {
	  if (this._events) {
	    var evlistener = this._events[type];

	    if (isFunction(evlistener))
	      return 1;
	    else if (evlistener)
	      return evlistener.length;
	  }
	  return 0;
	};

	EventEmitter.listenerCount = function(emitter, type) {
	  return emitter.listenerCount(type);
	};

	function isFunction(arg) {
	  return typeof arg === 'function';
	}

	function isNumber(arg) {
	  return typeof arg === 'number';
	}

	function isObject(arg) {
	  return typeof arg === 'object' && arg !== null;
	}

	function isUndefined(arg) {
	  return arg === void 0;
	}


/***/ },
/* 61 */
/***/ function(module, exports, __webpack_require__) {

	/* WEBPACK VAR INJECTION */(function(process) {'use strict';

	const fs = __webpack_require__(64);

	let isNodejs = process.version ? true : false;

	const LogLevels = {
	  'DEBUG': 'DEBUG',
	  'INFO':  'INFO',
	  'WARN':  'WARN',
	  'ERROR': 'ERROR',
	  'NONE':  'NONE',
	};

	// Global log level
	let GlobalLogLevel = LogLevels.DEBUG;

	// Global log file name
	let GlobalLogfile = null;

	// ANSI colors
	let Colors = {
	  'Black':   0,
	  'Red':     1,
	  'Green':   2,
	  'Yellow':  3,
	  'Blue':    4,
	  'Magenta': 5,
	  'Cyan':    6,
	  'Grey':    7,
	  'White':   9,
	  'Default': 9,
	};

	// CSS colors
	if(!isNodejs) {
	  Colors = {
	    'Black':   'Black',
	    'Red':     'IndianRed',
	    'Green':   'LimeGreen',
	    'Yellow':  'Orange',
	    'Blue':    'RoyalBlue',
	    'Magenta': 'Orchid',
	    'Cyan':    'SkyBlue',
	    'Grey':    'DimGrey',
	    'White':   'White',
	    'Default': 'Black',
	  };
	}

	const loglevelColors = [Colors.Cyan, Colors.Green, Colors.Yellow, Colors.Red, Colors.Default];

	const defaultOptions = {
	  useColors: true,
	  color: Colors.Default,
	  showTimestamp: true,
	  showLevel: true,
	  filename: GlobalLogfile,
	  appendFile: true,
	};

	class Logger {
	  constructor(category, options) {
	    this.category = category;
	    let opts = {};
	    Object.assign(opts, defaultOptions);
	    Object.assign(opts, options);
	    this.options = opts;
	  }

	  debug(text) {
	    this._write(LogLevels.DEBUG, text);
	  }

	  log(text) {
	    this.debug(text);
	  }

	  info(text) {
	    this._write(LogLevels.INFO, text);
	  }

	  warn(text) {
	    this._write(LogLevels.WARN, text);
	  }

	  error(text) {
	    this._write(LogLevels.ERROR, text);
	  }

	  _write(level, text) {
	    if(!this._shouldLog(level))
	      return;

	    if((this.options.filename || GlobalLogfile) && !this.fileWriter)
	      this.fileWriter = fs.openSync(this.options.filename || GlobalLogfile, this.options.appendFile ? 'a+' : 'w+');

	    let format = this._format(level, text);
	    let unformattedText = this._createLogMessage(level, text);
	    let formattedText = this._createLogMessage(level, text, format.timestamp, format.level, format.category, format.text);

	    if(this.fileWriter)
	      fs.writeSync(this.fileWriter, unformattedText + '\n', null, 'utf-8');

	    if(isNodejs) {
	      console.log(formattedText)
	    } else {
	      // TODO: clean this up
	      if(level === LogLevels.ERROR) {
	        if(this.options.showTimestamp && this.options.showLevel) {
	          console.error(formattedText, format.timestamp, format.level, format.category, format.text)
	        } else if(this.options.showTimestamp && !this.options.showLevel) {
	          console.error(formattedText, format.timestamp, format.category, format.text)
	        } else if(!this.options.showTimestamp && this.options.showLevel) {
	          console.error(formattedText, format.level, format.category, format.text)
	        } else {
	          console.error(formattedText, format.category, format.text)
	        }
	      } else {
	        if(this.options.showTimestamp && this.options.showLevel) {
	          console.log(formattedText, format.timestamp, format.level, format.category, format.text)
	        } else if(this.options.showTimestamp && !this.options.showLevel) {
	          console.log(formattedText, format.timestamp, format.category, format.text)
	        } else if(!this.options.showTimestamp && this.options.showLevel) {
	          console.log(formattedText, format.level, format.category, format.text)
	        } else {
	          console.log(formattedText, format.category, format.text)
	        }
	      }
	    }
	  }

	  _format(level, text) {
	    let timestampFormat = '';
	    let levelFormat     = '';
	    let categoryFormat  = '';
	    let textFormat      = ': ';

	    if(this.options.useColors) {
	        const levelColor    = Object.keys(LogLevels).map((f) => LogLevels[f]).indexOf(level);
	        const categoryColor = this.options.color;

	      if(isNodejs) {
	        if(this.options.showTimestamp)
	          timestampFormat = '\u001b[3' + Colors.Grey + 'm';

	        if(this.options.showLevel)
	          levelFormat = '\u001b[3' + loglevelColors[levelColor] + ';22m';

	        categoryFormat = '\u001b[3' + categoryColor + ';1m';
	        textFormat = '\u001b[0m: ';
	      } else {
	        if(this.options.showTimestamp)
	          timestampFormat = 'color:' + Colors.Grey;

	        if(this.options.showLevel)
	          levelFormat = 'color:' + loglevelColors[levelColor];

	        categoryFormat = 'color:' + categoryColor + '; font-weight: bold';
	      }
	    }

	    return {
	      timestamp: timestampFormat,
	      level: levelFormat,
	      category: categoryFormat,
	      text: textFormat
	    };
	  }

	  _createLogMessage(level, text, timestampFormat, levelFormat, categoryFormat, textFormat) {
	    timestampFormat = timestampFormat || '';
	    levelFormat     = levelFormat     || '';
	    categoryFormat  = categoryFormat  || '';
	    textFormat      = textFormat      || ': ';

	    if(!isNodejs) {
	      if(this.options.showTimestamp)
	        timestampFormat = '%c';

	      if(this.options.showLevel)
	        levelFormat = '%c';

	      categoryFormat  = '%c';
	      textFormat = ': %c';
	    }

	    let result = '';

	    if(this.options.showTimestamp)
	      result += '' + new Date().toISOString() + ' ';

	    result = timestampFormat + result;

	    if(this.options.showLevel)
	      result += levelFormat + '[' + level +']' + (level === LogLevels.INFO || level === LogLevels.WARN ? ' ' : '') + ' ';

	    result += categoryFormat + this.category;
	    result += textFormat + text;
	    return result;
	  }

	  _shouldLog(level) {
	    const levels   = Object.keys(LogLevels).map((f) => LogLevels[f]);
	    const index    = levels.indexOf(level);
	    const levelIdx = levels.indexOf(GlobalLogLevel);
	    return index >= levelIdx;
	  }
	};

	/* Public API */
	module.exports = {
	  Colors: Colors,
	  LogLevels: LogLevels,
	  setLogLevel: (level) => {
	    GlobalLogLevel = level;
	  },
	  setLogfile: (filename) => {
	    GlobalLogfile = filename;
	  },
	  create: (category, options) => {
	    const logger = new Logger(category, options);
	    return logger;
	  },
	  forceBrowserMode: (force) => isNodejs = !force, // for testing
	};

	/* WEBPACK VAR INJECTION */}.call(exports, __webpack_require__(62)))

/***/ },
/* 62 */
/***/ function(module, exports, __webpack_require__) {

	exports.nextTick = function nextTick(fn) {
		setTimeout(fn, 0);
	};

	exports.platform = exports.arch = 
	exports.execPath = exports.title = 'browser';
	exports.pid = 1;
	exports.browser = true;
	exports.env = {};
	exports.argv = [];

	exports.binding = function (name) {
		throw new Error('No such module. (Possibly not yet loaded)')
	};

	(function () {
	    var cwd = '/';
	    var path;
	    exports.cwd = function () { return cwd };
	    exports.chdir = function (dir) {
	        if (!path) path = __webpack_require__(63);
	        cwd = path.resolve(dir, cwd);
	    };
	})();

	exports.exit = exports.kill = 
	exports.umask = exports.dlopen = 
	exports.uptime = exports.memoryUsage = 
	exports.uvCounters = function() {};
	exports.features = {};


/***/ },
/* 63 */
/***/ function(module, exports, __webpack_require__) {

	/* WEBPACK VAR INJECTION */(function(process) {// Copyright Joyent, Inc. and other Node contributors.
	//
	// Permission is hereby granted, free of charge, to any person obtaining a
	// copy of this software and associated documentation files (the
	// "Software"), to deal in the Software without restriction, including
	// without limitation the rights to use, copy, modify, merge, publish,
	// distribute, sublicense, and/or sell copies of the Software, and to permit
	// persons to whom the Software is furnished to do so, subject to the
	// following conditions:
	//
	// The above copyright notice and this permission notice shall be included
	// in all copies or substantial portions of the Software.
	//
	// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
	// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
	// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
	// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
	// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
	// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
	// USE OR OTHER DEALINGS IN THE SOFTWARE.

	// resolves . and .. elements in a path array with directory names there
	// must be no slashes, empty elements, or device names (c:\) in the array
	// (so also no leading and trailing slashes - it does not distinguish
	// relative and absolute paths)
	function normalizeArray(parts, allowAboveRoot) {
	  // if the path tries to go above the root, `up` ends up > 0
	  var up = 0;
	  for (var i = parts.length - 1; i >= 0; i--) {
	    var last = parts[i];
	    if (last === '.') {
	      parts.splice(i, 1);
	    } else if (last === '..') {
	      parts.splice(i, 1);
	      up++;
	    } else if (up) {
	      parts.splice(i, 1);
	      up--;
	    }
	  }

	  // if the path is allowed to go above the root, restore leading ..s
	  if (allowAboveRoot) {
	    for (; up--; up) {
	      parts.unshift('..');
	    }
	  }

	  return parts;
	}

	// Split a filename into [root, dir, basename, ext], unix version
	// 'root' is just a slash, or nothing.
	var splitPathRe =
	    /^(\/?|)([\s\S]*?)((?:\.{1,2}|[^\/]+?|)(\.[^.\/]*|))(?:[\/]*)$/;
	var splitPath = function(filename) {
	  return splitPathRe.exec(filename).slice(1);
	};

	// path.resolve([from ...], to)
	// posix version
	exports.resolve = function() {
	  var resolvedPath = '',
	      resolvedAbsolute = false;

	  for (var i = arguments.length - 1; i >= -1 && !resolvedAbsolute; i--) {
	    var path = (i >= 0) ? arguments[i] : process.cwd();

	    // Skip empty and invalid entries
	    if (typeof path !== 'string') {
	      throw new TypeError('Arguments to path.resolve must be strings');
	    } else if (!path) {
	      continue;
	    }

	    resolvedPath = path + '/' + resolvedPath;
	    resolvedAbsolute = path.charAt(0) === '/';
	  }

	  // At this point the path should be resolved to a full absolute path, but
	  // handle relative paths to be safe (might happen when process.cwd() fails)

	  // Normalize the path
	  resolvedPath = normalizeArray(filter(resolvedPath.split('/'), function(p) {
	    return !!p;
	  }), !resolvedAbsolute).join('/');

	  return ((resolvedAbsolute ? '/' : '') + resolvedPath) || '.';
	};

	// path.normalize(path)
	// posix version
	exports.normalize = function(path) {
	  var isAbsolute = exports.isAbsolute(path),
	      trailingSlash = substr(path, -1) === '/';

	  // Normalize the path
	  path = normalizeArray(filter(path.split('/'), function(p) {
	    return !!p;
	  }), !isAbsolute).join('/');

	  if (!path && !isAbsolute) {
	    path = '.';
	  }
	  if (path && trailingSlash) {
	    path += '/';
	  }

	  return (isAbsolute ? '/' : '') + path;
	};

	// posix version
	exports.isAbsolute = function(path) {
	  return path.charAt(0) === '/';
	};

	// posix version
	exports.join = function() {
	  var paths = Array.prototype.slice.call(arguments, 0);
	  return exports.normalize(filter(paths, function(p, index) {
	    if (typeof p !== 'string') {
	      throw new TypeError('Arguments to path.join must be strings');
	    }
	    return p;
	  }).join('/'));
	};


	// path.relative(from, to)
	// posix version
	exports.relative = function(from, to) {
	  from = exports.resolve(from).substr(1);
	  to = exports.resolve(to).substr(1);

	  function trim(arr) {
	    var start = 0;
	    for (; start < arr.length; start++) {
	      if (arr[start] !== '') break;
	    }

	    var end = arr.length - 1;
	    for (; end >= 0; end--) {
	      if (arr[end] !== '') break;
	    }

	    if (start > end) return [];
	    return arr.slice(start, end - start + 1);
	  }

	  var fromParts = trim(from.split('/'));
	  var toParts = trim(to.split('/'));

	  var length = Math.min(fromParts.length, toParts.length);
	  var samePartsLength = length;
	  for (var i = 0; i < length; i++) {
	    if (fromParts[i] !== toParts[i]) {
	      samePartsLength = i;
	      break;
	    }
	  }

	  var outputParts = [];
	  for (var i = samePartsLength; i < fromParts.length; i++) {
	    outputParts.push('..');
	  }

	  outputParts = outputParts.concat(toParts.slice(samePartsLength));

	  return outputParts.join('/');
	};

	exports.sep = '/';
	exports.delimiter = ':';

	exports.dirname = function(path) {
	  var result = splitPath(path),
	      root = result[0],
	      dir = result[1];

	  if (!root && !dir) {
	    // No dirname whatsoever
	    return '.';
	  }

	  if (dir) {
	    // It has a dirname, strip trailing slash
	    dir = dir.substr(0, dir.length - 1);
	  }

	  return root + dir;
	};


	exports.basename = function(path, ext) {
	  var f = splitPath(path)[2];
	  // TODO: make this comparison case-insensitive on windows?
	  if (ext && f.substr(-1 * ext.length) === ext) {
	    f = f.substr(0, f.length - ext.length);
	  }
	  return f;
	};


	exports.extname = function(path) {
	  return splitPath(path)[3];
	};

	function filter (xs, f) {
	    if (xs.filter) return xs.filter(f);
	    var res = [];
	    for (var i = 0; i < xs.length; i++) {
	        if (f(xs[i], i, xs)) res.push(xs[i]);
	    }
	    return res;
	}

	// String.prototype.substr - negative index don't work in IE8
	var substr = 'ab'.substr(-1) === 'b'
	    ? function (str, start, len) { return str.substr(start, len) }
	    : function (str, start, len) {
	        if (start < 0) start = str.length + start;
	        return str.substr(start, len);
	    }
	;

	/* WEBPACK VAR INJECTION */}.call(exports, __webpack_require__(62)))

/***/ },
/* 64 */
/***/ function(module, exports) {

	module.exports = {
	  createWriteStream: function(filename, options) {
	    return;
	  },
	  writeFileSync: function() {
	    return;
	  },
	  openSync: function() {
	    return;
	  },
	  writeSync: function() {
	    return;
	  }
	}


/***/ },
/* 65 */
/***/ function(module, exports, __webpack_require__) {

	'use strict';

	var _stringify = __webpack_require__(66);

	var _stringify2 = _interopRequireDefault(_stringify);

	var _promise = __webpack_require__(1);

	var _promise2 = _interopRequireDefault(_promise);

	var _classCallCheck2 = __webpack_require__(56);

	var _classCallCheck3 = _interopRequireDefault(_classCallCheck2);

	var _createClass2 = __webpack_require__(57);

	var _createClass3 = _interopRequireDefault(_createClass2);

	function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

	var io = __webpack_require__(68);
	var logger = __webpack_require__(61).create("orbit-db.Pubsub");

	var Pubsub = function () {
	  function Pubsub(ipfs) {
	    (0, _classCallCheck3.default)(this, Pubsub);

	    this.ipfs = ipfs;
	    this._socket = null;
	    this._subscriptions = {};
	    this.onConnected = null;
	    this.onConnectionError = null;
	  }

	  (0, _createClass3.default)(Pubsub, [{
	    key: 'connect',
	    value: function connect(host, port, username, password) {
	      var _this = this;

	      return new _promise2.default(function (resolve, reject) {
	        if (!_this._socket) _this._socket = io.connect('http://' + host + ':' + port, { 'forceNew': true });

	        _this._socket.on('connect', resolve);
	        _this._socket.on('connect_error', function (err) {
	          return reject(new Error('Connection refused to Pubsub at \'' + host + ':' + port + '\''));
	        });
	        _this._socket.on('disconnect', function (socket) {
	          return logger.warn('Disconnected from Pubsub at \'http://' + host + ':' + port + '\'');
	        });
	        _this._socket.on('error', function (e) {
	          return logger.error('Pubsub socket error:', e);
	        });
	        _this._socket.on('message', _this._handleMessage.bind(_this));
	        _this._socket.on('subscribed', _this._handleMessage.bind(_this));
	      });
	    }
	  }, {
	    key: 'disconnect',
	    value: function disconnect() {
	      if (this._socket) this._socket.disconnect();
	    }
	  }, {
	    key: 'subscribe',
	    value: function subscribe(hash, password, callback) {
	      if (!this._subscriptions[hash]) {
	        this._subscriptions[hash] = { callback: callback };
	        this._socket.emit('subscribe', { channel: hash }); // calls back with 'subscribed' event
	      }
	    }
	  }, {
	    key: 'unsubscribe',
	    value: function unsubscribe(hash) {
	      this._socket.emit('unsubscribe', { channel: hash });
	      delete this._subscriptions[hash];
	    }
	  }, {
	    key: 'publish',
	    value: function publish(hash, message) {
	      this._socket.send((0, _stringify2.default)({ channel: hash, message: message }));
	    }
	  }, {
	    key: '_handleMessage',
	    value: function _handleMessage(hash, message) {
	      if (this._subscriptions[hash] && this._subscriptions[hash].callback) this._subscriptions[hash].callback(hash, message);
	    }
	  }]);
	  return Pubsub;
	}();

	module.exports = Pubsub;

/***/ },
/* 66 */
/***/ function(module, exports, __webpack_require__) {

	module.exports = { "default": __webpack_require__(67), __esModule: true };

/***/ },
/* 67 */
/***/ function(module, exports, __webpack_require__) {

	var core = __webpack_require__(12);
	module.exports = function stringify(it){ // eslint-disable-line no-unused-vars
	  return (core.JSON && core.JSON.stringify || JSON.stringify).apply(JSON, arguments);
	};

/***/ },
/* 68 */
/***/ function(module, exports, __webpack_require__) {

	
	/**
	 * Module dependencies.
	 */

	var url = __webpack_require__(69);
	var parser = __webpack_require__(74);
	var Manager = __webpack_require__(82);
	var debug = __webpack_require__(71)('socket.io-client');

	/**
	 * Module exports.
	 */

	module.exports = exports = lookup;

	/**
	 * Managers cache.
	 */

	var cache = exports.managers = {};

	/**
	 * Looks up an existing `Manager` for multiplexing.
	 * If the user summons:
	 *
	 *   `io('http://localhost/a');`
	 *   `io('http://localhost/b');`
	 *
	 * We reuse the existing instance based on same scheme/port/host,
	 * and we initialize sockets for each namespace.
	 *
	 * @api public
	 */

	function lookup(uri, opts) {
	  if (typeof uri == 'object') {
	    opts = uri;
	    uri = undefined;
	  }

	  opts = opts || {};

	  var parsed = url(uri);
	  var source = parsed.source;
	  var id = parsed.id;
	  var path = parsed.path;
	  var sameNamespace = cache[id] && path in cache[id].nsps;
	  var newConnection = opts.forceNew || opts['force new connection'] ||
	                      false === opts.multiplex || sameNamespace;

	  var io;

	  if (newConnection) {
	    debug('ignoring socket cache for %s', source);
	    io = Manager(source, opts);
	  } else {
	    if (!cache[id]) {
	      debug('new io instance for %s', source);
	      cache[id] = Manager(source, opts);
	    }
	    io = cache[id];
	  }

	  return io.socket(parsed.path);
	}

	/**
	 * Protocol version.
	 *
	 * @api public
	 */

	exports.protocol = parser.protocol;

	/**
	 * `connect`.
	 *
	 * @param {String} uri
	 * @api public
	 */

	exports.connect = lookup;

	/**
	 * Expose constructors for standalone build.
	 *
	 * @api public
	 */

	exports.Manager = __webpack_require__(82);
	exports.Socket = __webpack_require__(110);


/***/ },
/* 69 */
/***/ function(module, exports, __webpack_require__) {

	/* WEBPACK VAR INJECTION */(function(global) {
	/**
	 * Module dependencies.
	 */

	var parseuri = __webpack_require__(70);
	var debug = __webpack_require__(71)('socket.io-client:url');

	/**
	 * Module exports.
	 */

	module.exports = url;

	/**
	 * URL parser.
	 *
	 * @param {String} url
	 * @param {Object} An object meant to mimic window.location.
	 *                 Defaults to window.location.
	 * @api public
	 */

	function url(uri, loc){
	  var obj = uri;

	  // default to window.location
	  var loc = loc || global.location;
	  if (null == uri) uri = loc.protocol + '//' + loc.host;

	  // relative path support
	  if ('string' == typeof uri) {
	    if ('/' == uri.charAt(0)) {
	      if ('/' == uri.charAt(1)) {
	        uri = loc.protocol + uri;
	      } else {
	        uri = loc.host + uri;
	      }
	    }

	    if (!/^(https?|wss?):\/\//.test(uri)) {
	      debug('protocol-less url %s', uri);
	      if ('undefined' != typeof loc) {
	        uri = loc.protocol + '//' + uri;
	      } else {
	        uri = 'https://' + uri;
	      }
	    }

	    // parse
	    debug('parse %s', uri);
	    obj = parseuri(uri);
	  }

	  // make sure we treat `localhost:80` and `localhost` equally
	  if (!obj.port) {
	    if (/^(http|ws)$/.test(obj.protocol)) {
	      obj.port = '80';
	    }
	    else if (/^(http|ws)s$/.test(obj.protocol)) {
	      obj.port = '443';
	    }
	  }

	  obj.path = obj.path || '/';

	  var ipv6 = obj.host.indexOf(':') !== -1;
	  var host = ipv6 ? '[' + obj.host + ']' : obj.host;

	  // define unique id
	  obj.id = obj.protocol + '://' + host + ':' + obj.port;
	  // define href
	  obj.href = obj.protocol + '://' + host + (loc && loc.port == obj.port ? '' : (':' + obj.port));

	  return obj;
	}

	/* WEBPACK VAR INJECTION */}.call(exports, (function() { return this; }())))

/***/ },
/* 70 */
/***/ function(module, exports) {

	/**
	 * Parses an URI
	 *
	 * @author Steven Levithan <stevenlevithan.com> (MIT license)
	 * @api private
	 */

	var re = /^(?:(?![^:@]+:[^:@\/]*@)(http|https|ws|wss):\/\/)?((?:(([^:@]*)(?::([^:@]*))?)?@)?((?:[a-f0-9]{0,4}:){2,7}[a-f0-9]{0,4}|[^:\/?#]*)(?::(\d*))?)(((\/(?:[^?#](?![^?#\/]*\.[^?#\/.]+(?:[?#]|$)))*\/?)?([^?#\/]*))(?:\?([^#]*))?(?:#(.*))?)/;

	var parts = [
	    'source', 'protocol', 'authority', 'userInfo', 'user', 'password', 'host', 'port', 'relative', 'path', 'directory', 'file', 'query', 'anchor'
	];

	module.exports = function parseuri(str) {
	    var src = str,
	        b = str.indexOf('['),
	        e = str.indexOf(']');

	    if (b != -1 && e != -1) {
	        str = str.substring(0, b) + str.substring(b, e).replace(/:/g, ';') + str.substring(e, str.length);
	    }

	    var m = re.exec(str || ''),
	        uri = {},
	        i = 14;

	    while (i--) {
	        uri[parts[i]] = m[i] || '';
	    }

	    if (b != -1 && e != -1) {
	        uri.source = src;
	        uri.host = uri.host.substring(1, uri.host.length - 1).replace(/;/g, ':');
	        uri.authority = uri.authority.replace('[', '').replace(']', '').replace(/;/g, ':');
	        uri.ipv6uri = true;
	    }

	    return uri;
	};


/***/ },
/* 71 */
/***/ function(module, exports, __webpack_require__) {

	
	/**
	 * This is the web browser implementation of `debug()`.
	 *
	 * Expose `debug()` as the module.
	 */

	exports = module.exports = __webpack_require__(72);
	exports.log = log;
	exports.formatArgs = formatArgs;
	exports.save = save;
	exports.load = load;
	exports.useColors = useColors;
	exports.storage = 'undefined' != typeof chrome
	               && 'undefined' != typeof chrome.storage
	                  ? chrome.storage.local
	                  : localstorage();

	/**
	 * Colors.
	 */

	exports.colors = [
	  'lightseagreen',
	  'forestgreen',
	  'goldenrod',
	  'dodgerblue',
	  'darkorchid',
	  'crimson'
	];

	/**
	 * Currently only WebKit-based Web Inspectors, Firefox >= v31,
	 * and the Firebug extension (any Firefox version) are known
	 * to support "%c" CSS customizations.
	 *
	 * TODO: add a `localStorage` variable to explicitly enable/disable colors
	 */

	function useColors() {
	  // is webkit? http://stackoverflow.com/a/16459606/376773
	  return ('WebkitAppearance' in document.documentElement.style) ||
	    // is firebug? http://stackoverflow.com/a/398120/376773
	    (window.console && (console.firebug || (console.exception && console.table))) ||
	    // is firefox >= v31?
	    // https://developer.mozilla.org/en-US/docs/Tools/Web_Console#Styling_messages
	    (navigator.userAgent.toLowerCase().match(/firefox\/(\d+)/) && parseInt(RegExp.$1, 10) >= 31);
	}

	/**
	 * Map %j to `JSON.stringify()`, since no Web Inspectors do that by default.
	 */

	exports.formatters.j = function(v) {
	  return JSON.stringify(v);
	};


	/**
	 * Colorize log arguments if enabled.
	 *
	 * @api public
	 */

	function formatArgs() {
	  var args = arguments;
	  var useColors = this.useColors;

	  args[0] = (useColors ? '%c' : '')
	    + this.namespace
	    + (useColors ? ' %c' : ' ')
	    + args[0]
	    + (useColors ? '%c ' : ' ')
	    + '+' + exports.humanize(this.diff);

	  if (!useColors) return args;

	  var c = 'color: ' + this.color;
	  args = [args[0], c, 'color: inherit'].concat(Array.prototype.slice.call(args, 1));

	  // the final "%c" is somewhat tricky, because there could be other
	  // arguments passed either before or after the %c, so we need to
	  // figure out the correct index to insert the CSS into
	  var index = 0;
	  var lastC = 0;
	  args[0].replace(/%[a-z%]/g, function(match) {
	    if ('%%' === match) return;
	    index++;
	    if ('%c' === match) {
	      // we only are interested in the *last* %c
	      // (the user may have provided their own)
	      lastC = index;
	    }
	  });

	  args.splice(lastC, 0, c);
	  return args;
	}

	/**
	 * Invokes `console.log()` when available.
	 * No-op when `console.log` is not a "function".
	 *
	 * @api public
	 */

	function log() {
	  // this hackery is required for IE8/9, where
	  // the `console.log` function doesn't have 'apply'
	  return 'object' === typeof console
	    && console.log
	    && Function.prototype.apply.call(console.log, console, arguments);
	}

	/**
	 * Save `namespaces`.
	 *
	 * @param {String} namespaces
	 * @api private
	 */

	function save(namespaces) {
	  try {
	    if (null == namespaces) {
	      exports.storage.removeItem('debug');
	    } else {
	      exports.storage.debug = namespaces;
	    }
	  } catch(e) {}
	}

	/**
	 * Load `namespaces`.
	 *
	 * @return {String} returns the previously persisted debug modes
	 * @api private
	 */

	function load() {
	  var r;
	  try {
	    r = exports.storage.debug;
	  } catch(e) {}
	  return r;
	}

	/**
	 * Enable namespaces listed in `localStorage.debug` initially.
	 */

	exports.enable(load());

	/**
	 * Localstorage attempts to return the localstorage.
	 *
	 * This is necessary because safari throws
	 * when a user disables cookies/localstorage
	 * and you attempt to access it.
	 *
	 * @return {LocalStorage}
	 * @api private
	 */

	function localstorage(){
	  try {
	    return window.localStorage;
	  } catch (e) {}
	}


/***/ },
/* 72 */
/***/ function(module, exports, __webpack_require__) {

	
	/**
	 * This is the common logic for both the Node.js and web browser
	 * implementations of `debug()`.
	 *
	 * Expose `debug()` as the module.
	 */

	exports = module.exports = debug;
	exports.coerce = coerce;
	exports.disable = disable;
	exports.enable = enable;
	exports.enabled = enabled;
	exports.humanize = __webpack_require__(73);

	/**
	 * The currently active debug mode names, and names to skip.
	 */

	exports.names = [];
	exports.skips = [];

	/**
	 * Map of special "%n" handling functions, for the debug "format" argument.
	 *
	 * Valid key names are a single, lowercased letter, i.e. "n".
	 */

	exports.formatters = {};

	/**
	 * Previously assigned color.
	 */

	var prevColor = 0;

	/**
	 * Previous log timestamp.
	 */

	var prevTime;

	/**
	 * Select a color.
	 *
	 * @return {Number}
	 * @api private
	 */

	function selectColor() {
	  return exports.colors[prevColor++ % exports.colors.length];
	}

	/**
	 * Create a debugger with the given `namespace`.
	 *
	 * @param {String} namespace
	 * @return {Function}
	 * @api public
	 */

	function debug(namespace) {

	  // define the `disabled` version
	  function disabled() {
	  }
	  disabled.enabled = false;

	  // define the `enabled` version
	  function enabled() {

	    var self = enabled;

	    // set `diff` timestamp
	    var curr = +new Date();
	    var ms = curr - (prevTime || curr);
	    self.diff = ms;
	    self.prev = prevTime;
	    self.curr = curr;
	    prevTime = curr;

	    // add the `color` if not set
	    if (null == self.useColors) self.useColors = exports.useColors();
	    if (null == self.color && self.useColors) self.color = selectColor();

	    var args = Array.prototype.slice.call(arguments);

	    args[0] = exports.coerce(args[0]);

	    if ('string' !== typeof args[0]) {
	      // anything else let's inspect with %o
	      args = ['%o'].concat(args);
	    }

	    // apply any `formatters` transformations
	    var index = 0;
	    args[0] = args[0].replace(/%([a-z%])/g, function(match, format) {
	      // if we encounter an escaped % then don't increase the array index
	      if (match === '%%') return match;
	      index++;
	      var formatter = exports.formatters[format];
	      if ('function' === typeof formatter) {
	        var val = args[index];
	        match = formatter.call(self, val);

	        // now we need to remove `args[index]` since it's inlined in the `format`
	        args.splice(index, 1);
	        index--;
	      }
	      return match;
	    });

	    if ('function' === typeof exports.formatArgs) {
	      args = exports.formatArgs.apply(self, args);
	    }
	    var logFn = enabled.log || exports.log || console.log.bind(console);
	    logFn.apply(self, args);
	  }
	  enabled.enabled = true;

	  var fn = exports.enabled(namespace) ? enabled : disabled;

	  fn.namespace = namespace;

	  return fn;
	}

	/**
	 * Enables a debug mode by namespaces. This can include modes
	 * separated by a colon and wildcards.
	 *
	 * @param {String} namespaces
	 * @api public
	 */

	function enable(namespaces) {
	  exports.save(namespaces);

	  var split = (namespaces || '').split(/[\s,]+/);
	  var len = split.length;

	  for (var i = 0; i < len; i++) {
	    if (!split[i]) continue; // ignore empty strings
	    namespaces = split[i].replace(/\*/g, '.*?');
	    if (namespaces[0] === '-') {
	      exports.skips.push(new RegExp('^' + namespaces.substr(1) + '$'));
	    } else {
	      exports.names.push(new RegExp('^' + namespaces + '$'));
	    }
	  }
	}

	/**
	 * Disable debug output.
	 *
	 * @api public
	 */

	function disable() {
	  exports.enable('');
	}

	/**
	 * Returns true if the given mode name is enabled, false otherwise.
	 *
	 * @param {String} name
	 * @return {Boolean}
	 * @api public
	 */

	function enabled(name) {
	  var i, len;
	  for (i = 0, len = exports.skips.length; i < len; i++) {
	    if (exports.skips[i].test(name)) {
	      return false;
	    }
	  }
	  for (i = 0, len = exports.names.length; i < len; i++) {
	    if (exports.names[i].test(name)) {
	      return true;
	    }
	  }
	  return false;
	}

	/**
	 * Coerce `val`.
	 *
	 * @param {Mixed} val
	 * @return {Mixed}
	 * @api private
	 */

	function coerce(val) {
	  if (val instanceof Error) return val.stack || val.message;
	  return val;
	}


/***/ },
/* 73 */
/***/ function(module, exports) {

	/**
	 * Helpers.
	 */

	var s = 1000;
	var m = s * 60;
	var h = m * 60;
	var d = h * 24;
	var y = d * 365.25;

	/**
	 * Parse or format the given `val`.
	 *
	 * Options:
	 *
	 *  - `long` verbose formatting [false]
	 *
	 * @param {String|Number} val
	 * @param {Object} options
	 * @return {String|Number}
	 * @api public
	 */

	module.exports = function(val, options){
	  options = options || {};
	  if ('string' == typeof val) return parse(val);
	  return options.long
	    ? long(val)
	    : short(val);
	};

	/**
	 * Parse the given `str` and return milliseconds.
	 *
	 * @param {String} str
	 * @return {Number}
	 * @api private
	 */

	function parse(str) {
	  str = '' + str;
	  if (str.length > 10000) return;
	  var match = /^((?:\d+)?\.?\d+) *(milliseconds?|msecs?|ms|seconds?|secs?|s|minutes?|mins?|m|hours?|hrs?|h|days?|d|years?|yrs?|y)?$/i.exec(str);
	  if (!match) return;
	  var n = parseFloat(match[1]);
	  var type = (match[2] || 'ms').toLowerCase();
	  switch (type) {
	    case 'years':
	    case 'year':
	    case 'yrs':
	    case 'yr':
	    case 'y':
	      return n * y;
	    case 'days':
	    case 'day':
	    case 'd':
	      return n * d;
	    case 'hours':
	    case 'hour':
	    case 'hrs':
	    case 'hr':
	    case 'h':
	      return n * h;
	    case 'minutes':
	    case 'minute':
	    case 'mins':
	    case 'min':
	    case 'm':
	      return n * m;
	    case 'seconds':
	    case 'second':
	    case 'secs':
	    case 'sec':
	    case 's':
	      return n * s;
	    case 'milliseconds':
	    case 'millisecond':
	    case 'msecs':
	    case 'msec':
	    case 'ms':
	      return n;
	  }
	}

	/**
	 * Short format for `ms`.
	 *
	 * @param {Number} ms
	 * @return {String}
	 * @api private
	 */

	function short(ms) {
	  if (ms >= d) return Math.round(ms / d) + 'd';
	  if (ms >= h) return Math.round(ms / h) + 'h';
	  if (ms >= m) return Math.round(ms / m) + 'm';
	  if (ms >= s) return Math.round(ms / s) + 's';
	  return ms + 'ms';
	}

	/**
	 * Long format for `ms`.
	 *
	 * @param {Number} ms
	 * @return {String}
	 * @api private
	 */

	function long(ms) {
	  return plural(ms, d, 'day')
	    || plural(ms, h, 'hour')
	    || plural(ms, m, 'minute')
	    || plural(ms, s, 'second')
	    || ms + ' ms';
	}

	/**
	 * Pluralization helper.
	 */

	function plural(ms, n, name) {
	  if (ms < n) return;
	  if (ms < n * 1.5) return Math.floor(ms / n) + ' ' + name;
	  return Math.ceil(ms / n) + ' ' + name + 's';
	}


/***/ },
/* 74 */
/***/ function(module, exports, __webpack_require__) {

	
	/**
	 * Module dependencies.
	 */

	var debug = __webpack_require__(71)('socket.io-parser');
	var json = __webpack_require__(75);
	var isArray = __webpack_require__(78);
	var Emitter = __webpack_require__(79);
	var binary = __webpack_require__(80);
	var isBuf = __webpack_require__(81);

	/**
	 * Protocol version.
	 *
	 * @api public
	 */

	exports.protocol = 4;

	/**
	 * Packet types.
	 *
	 * @api public
	 */

	exports.types = [
	  'CONNECT',
	  'DISCONNECT',
	  'EVENT',
	  'ACK',
	  'ERROR',
	  'BINARY_EVENT',
	  'BINARY_ACK'
	];

	/**
	 * Packet type `connect`.
	 *
	 * @api public
	 */

	exports.CONNECT = 0;

	/**
	 * Packet type `disconnect`.
	 *
	 * @api public
	 */

	exports.DISCONNECT = 1;

	/**
	 * Packet type `event`.
	 *
	 * @api public
	 */

	exports.EVENT = 2;

	/**
	 * Packet type `ack`.
	 *
	 * @api public
	 */

	exports.ACK = 3;

	/**
	 * Packet type `error`.
	 *
	 * @api public
	 */

	exports.ERROR = 4;

	/**
	 * Packet type 'binary event'
	 *
	 * @api public
	 */

	exports.BINARY_EVENT = 5;

	/**
	 * Packet type `binary ack`. For acks with binary arguments.
	 *
	 * @api public
	 */

	exports.BINARY_ACK = 6;

	/**
	 * Encoder constructor.
	 *
	 * @api public
	 */

	exports.Encoder = Encoder;

	/**
	 * Decoder constructor.
	 *
	 * @api public
	 */

	exports.Decoder = Decoder;

	/**
	 * A socket.io Encoder instance
	 *
	 * @api public
	 */

	function Encoder() {}

	/**
	 * Encode a packet as a single string if non-binary, or as a
	 * buffer sequence, depending on packet type.
	 *
	 * @param {Object} obj - packet object
	 * @param {Function} callback - function to handle encodings (likely engine.write)
	 * @return Calls callback with Array of encodings
	 * @api public
	 */

	Encoder.prototype.encode = function(obj, callback){
	  debug('encoding packet %j', obj);

	  if (exports.BINARY_EVENT == obj.type || exports.BINARY_ACK == obj.type) {
	    encodeAsBinary(obj, callback);
	  }
	  else {
	    var encoding = encodeAsString(obj);
	    callback([encoding]);
	  }
	};

	/**
	 * Encode packet as string.
	 *
	 * @param {Object} packet
	 * @return {String} encoded
	 * @api private
	 */

	function encodeAsString(obj) {
	  var str = '';
	  var nsp = false;

	  // first is type
	  str += obj.type;

	  // attachments if we have them
	  if (exports.BINARY_EVENT == obj.type || exports.BINARY_ACK == obj.type) {
	    str += obj.attachments;
	    str += '-';
	  }

	  // if we have a namespace other than `/`
	  // we append it followed by a comma `,`
	  if (obj.nsp && '/' != obj.nsp) {
	    nsp = true;
	    str += obj.nsp;
	  }

	  // immediately followed by the id
	  if (null != obj.id) {
	    if (nsp) {
	      str += ',';
	      nsp = false;
	    }
	    str += obj.id;
	  }

	  // json data
	  if (null != obj.data) {
	    if (nsp) str += ',';
	    str += json.stringify(obj.data);
	  }

	  debug('encoded %j as %s', obj, str);
	  return str;
	}

	/**
	 * Encode packet as 'buffer sequence' by removing blobs, and
	 * deconstructing packet into object with placeholders and
	 * a list of buffers.
	 *
	 * @param {Object} packet
	 * @return {Buffer} encoded
	 * @api private
	 */

	function encodeAsBinary(obj, callback) {

	  function writeEncoding(bloblessData) {
	    var deconstruction = binary.deconstructPacket(bloblessData);
	    var pack = encodeAsString(deconstruction.packet);
	    var buffers = deconstruction.buffers;

	    buffers.unshift(pack); // add packet info to beginning of data list
	    callback(buffers); // write all the buffers
	  }

	  binary.removeBlobs(obj, writeEncoding);
	}

	/**
	 * A socket.io Decoder instance
	 *
	 * @return {Object} decoder
	 * @api public
	 */

	function Decoder() {
	  this.reconstructor = null;
	}

	/**
	 * Mix in `Emitter` with Decoder.
	 */

	Emitter(Decoder.prototype);

	/**
	 * Decodes an ecoded packet string into packet JSON.
	 *
	 * @param {String} obj - encoded packet
	 * @return {Object} packet
	 * @api public
	 */

	Decoder.prototype.add = function(obj) {
	  var packet;
	  if ('string' == typeof obj) {
	    packet = decodeString(obj);
	    if (exports.BINARY_EVENT == packet.type || exports.BINARY_ACK == packet.type) { // binary packet's json
	      this.reconstructor = new BinaryReconstructor(packet);

	      // no attachments, labeled binary but no binary data to follow
	      if (this.reconstructor.reconPack.attachments === 0) {
	        this.emit('decoded', packet);
	      }
	    } else { // non-binary full packet
	      this.emit('decoded', packet);
	    }
	  }
	  else if (isBuf(obj) || obj.base64) { // raw binary data
	    if (!this.reconstructor) {
	      throw new Error('got binary data when not reconstructing a packet');
	    } else {
	      packet = this.reconstructor.takeBinaryData(obj);
	      if (packet) { // received final buffer
	        this.reconstructor = null;
	        this.emit('decoded', packet);
	      }
	    }
	  }
	  else {
	    throw new Error('Unknown type: ' + obj);
	  }
	};

	/**
	 * Decode a packet String (JSON data)
	 *
	 * @param {String} str
	 * @return {Object} packet
	 * @api private
	 */

	function decodeString(str) {
	  var p = {};
	  var i = 0;

	  // look up type
	  p.type = Number(str.charAt(0));
	  if (null == exports.types[p.type]) return error();

	  // look up attachments if type binary
	  if (exports.BINARY_EVENT == p.type || exports.BINARY_ACK == p.type) {
	    var buf = '';
	    while (str.charAt(++i) != '-') {
	      buf += str.charAt(i);
	      if (i == str.length) break;
	    }
	    if (buf != Number(buf) || str.charAt(i) != '-') {
	      throw new Error('Illegal attachments');
	    }
	    p.attachments = Number(buf);
	  }

	  // look up namespace (if any)
	  if ('/' == str.charAt(i + 1)) {
	    p.nsp = '';
	    while (++i) {
	      var c = str.charAt(i);
	      if (',' == c) break;
	      p.nsp += c;
	      if (i == str.length) break;
	    }
	  } else {
	    p.nsp = '/';
	  }

	  // look up id
	  var next = str.charAt(i + 1);
	  if ('' !== next && Number(next) == next) {
	    p.id = '';
	    while (++i) {
	      var c = str.charAt(i);
	      if (null == c || Number(c) != c) {
	        --i;
	        break;
	      }
	      p.id += str.charAt(i);
	      if (i == str.length) break;
	    }
	    p.id = Number(p.id);
	  }

	  // look up json data
	  if (str.charAt(++i)) {
	    try {
	      p.data = json.parse(str.substr(i));
	    } catch(e){
	      return error();
	    }
	  }

	  debug('decoded %s as %j', str, p);
	  return p;
	}

	/**
	 * Deallocates a parser's resources
	 *
	 * @api public
	 */

	Decoder.prototype.destroy = function() {
	  if (this.reconstructor) {
	    this.reconstructor.finishedReconstruction();
	  }
	};

	/**
	 * A manager of a binary event's 'buffer sequence'. Should
	 * be constructed whenever a packet of type BINARY_EVENT is
	 * decoded.
	 *
	 * @param {Object} packet
	 * @return {BinaryReconstructor} initialized reconstructor
	 * @api private
	 */

	function BinaryReconstructor(packet) {
	  this.reconPack = packet;
	  this.buffers = [];
	}

	/**
	 * Method to be called when binary data received from connection
	 * after a BINARY_EVENT packet.
	 *
	 * @param {Buffer | ArrayBuffer} binData - the raw binary data received
	 * @return {null | Object} returns null if more binary data is expected or
	 *   a reconstructed packet object if all buffers have been received.
	 * @api private
	 */

	BinaryReconstructor.prototype.takeBinaryData = function(binData) {
	  this.buffers.push(binData);
	  if (this.buffers.length == this.reconPack.attachments) { // done with buffer list
	    var packet = binary.reconstructPacket(this.reconPack, this.buffers);
	    this.finishedReconstruction();
	    return packet;
	  }
	  return null;
	};

	/**
	 * Cleans up binary packet reconstruction variables.
	 *
	 * @api private
	 */

	BinaryReconstructor.prototype.finishedReconstruction = function() {
	  this.reconPack = null;
	  this.buffers = [];
	};

	function error(data){
	  return {
	    type: exports.ERROR,
	    data: 'parser error'
	  };
	}


/***/ },
/* 75 */
/***/ function(module, exports, __webpack_require__) {

	var __WEBPACK_AMD_DEFINE_RESULT__;/* WEBPACK VAR INJECTION */(function(module, global) {/*! JSON v3.3.2 | http://bestiejs.github.io/json3 | Copyright 2012-2014, Kit Cambridge | http://kit.mit-license.org */
	;(function () {
	  // Detect the `define` function exposed by asynchronous module loaders. The
	  // strict `define` check is necessary for compatibility with `r.js`.
	  var isLoader = "function" === "function" && __webpack_require__(77);

	  // A set of types used to distinguish objects from primitives.
	  var objectTypes = {
	    "function": true,
	    "object": true
	  };

	  // Detect the `exports` object exposed by CommonJS implementations.
	  var freeExports = objectTypes[typeof exports] && exports && !exports.nodeType && exports;

	  // Use the `global` object exposed by Node (including Browserify via
	  // `insert-module-globals`), Narwhal, and Ringo as the default context,
	  // and the `window` object in browsers. Rhino exports a `global` function
	  // instead.
	  var root = objectTypes[typeof window] && window || this,
	      freeGlobal = freeExports && objectTypes[typeof module] && module && !module.nodeType && typeof global == "object" && global;

	  if (freeGlobal && (freeGlobal["global"] === freeGlobal || freeGlobal["window"] === freeGlobal || freeGlobal["self"] === freeGlobal)) {
	    root = freeGlobal;
	  }

	  // Public: Initializes JSON 3 using the given `context` object, attaching the
	  // `stringify` and `parse` functions to the specified `exports` object.
	  function runInContext(context, exports) {
	    context || (context = root["Object"]());
	    exports || (exports = root["Object"]());

	    // Native constructor aliases.
	    var Number = context["Number"] || root["Number"],
	        String = context["String"] || root["String"],
	        Object = context["Object"] || root["Object"],
	        Date = context["Date"] || root["Date"],
	        SyntaxError = context["SyntaxError"] || root["SyntaxError"],
	        TypeError = context["TypeError"] || root["TypeError"],
	        Math = context["Math"] || root["Math"],
	        nativeJSON = context["JSON"] || root["JSON"];

	    // Delegate to the native `stringify` and `parse` implementations.
	    if (typeof nativeJSON == "object" && nativeJSON) {
	      exports.stringify = nativeJSON.stringify;
	      exports.parse = nativeJSON.parse;
	    }

	    // Convenience aliases.
	    var objectProto = Object.prototype,
	        getClass = objectProto.toString,
	        isProperty, forEach, undef;

	    // Test the `Date#getUTC*` methods. Based on work by @Yaffle.
	    var isExtended = new Date(-3509827334573292);
	    try {
	      // The `getUTCFullYear`, `Month`, and `Date` methods return nonsensical
	      // results for certain dates in Opera >= 10.53.
	      isExtended = isExtended.getUTCFullYear() == -109252 && isExtended.getUTCMonth() === 0 && isExtended.getUTCDate() === 1 &&
	        // Safari < 2.0.2 stores the internal millisecond time value correctly,
	        // but clips the values returned by the date methods to the range of
	        // signed 32-bit integers ([-2 ** 31, 2 ** 31 - 1]).
	        isExtended.getUTCHours() == 10 && isExtended.getUTCMinutes() == 37 && isExtended.getUTCSeconds() == 6 && isExtended.getUTCMilliseconds() == 708;
	    } catch (exception) {}

	    // Internal: Determines whether the native `JSON.stringify` and `parse`
	    // implementations are spec-compliant. Based on work by Ken Snyder.
	    function has(name) {
	      if (has[name] !== undef) {
	        // Return cached feature test result.
	        return has[name];
	      }
	      var isSupported;
	      if (name == "bug-string-char-index") {
	        // IE <= 7 doesn't support accessing string characters using square
	        // bracket notation. IE 8 only supports this for primitives.
	        isSupported = "a"[0] != "a";
	      } else if (name == "json") {
	        // Indicates whether both `JSON.stringify` and `JSON.parse` are
	        // supported.
	        isSupported = has("json-stringify") && has("json-parse");
	      } else {
	        var value, serialized = '{"a":[1,true,false,null,"\\u0000\\b\\n\\f\\r\\t"]}';
	        // Test `JSON.stringify`.
	        if (name == "json-stringify") {
	          var stringify = exports.stringify, stringifySupported = typeof stringify == "function" && isExtended;
	          if (stringifySupported) {
	            // A test function object with a custom `toJSON` method.
	            (value = function () {
	              return 1;
	            }).toJSON = value;
	            try {
	              stringifySupported =
	                // Firefox 3.1b1 and b2 serialize string, number, and boolean
	                // primitives as object literals.
	                stringify(0) === "0" &&
	                // FF 3.1b1, b2, and JSON 2 serialize wrapped primitives as object
	                // literals.
	                stringify(new Number()) === "0" &&
	                stringify(new String()) == '""' &&
	                // FF 3.1b1, 2 throw an error if the value is `null`, `undefined`, or
	                // does not define a canonical JSON representation (this applies to
	                // objects with `toJSON` properties as well, *unless* they are nested
	                // within an object or array).
	                stringify(getClass) === undef &&
	                // IE 8 serializes `undefined` as `"undefined"`. Safari <= 5.1.7 and
	                // FF 3.1b3 pass this test.
	                stringify(undef) === undef &&
	                // Safari <= 5.1.7 and FF 3.1b3 throw `Error`s and `TypeError`s,
	                // respectively, if the value is omitted entirely.
	                stringify() === undef &&
	                // FF 3.1b1, 2 throw an error if the given value is not a number,
	                // string, array, object, Boolean, or `null` literal. This applies to
	                // objects with custom `toJSON` methods as well, unless they are nested
	                // inside object or array literals. YUI 3.0.0b1 ignores custom `toJSON`
	                // methods entirely.
	                stringify(value) === "1" &&
	                stringify([value]) == "[1]" &&
	                // Prototype <= 1.6.1 serializes `[undefined]` as `"[]"` instead of
	                // `"[null]"`.
	                stringify([undef]) == "[null]" &&
	                // YUI 3.0.0b1 fails to serialize `null` literals.
	                stringify(null) == "null" &&
	                // FF 3.1b1, 2 halts serialization if an array contains a function:
	                // `[1, true, getClass, 1]` serializes as "[1,true,],". FF 3.1b3
	                // elides non-JSON values from objects and arrays, unless they
	                // define custom `toJSON` methods.
	                stringify([undef, getClass, null]) == "[null,null,null]" &&
	                // Simple serialization test. FF 3.1b1 uses Unicode escape sequences
	                // where character escape codes are expected (e.g., `\b` => `\u0008`).
	                stringify({ "a": [value, true, false, null, "\x00\b\n\f\r\t"] }) == serialized &&
	                // FF 3.1b1 and b2 ignore the `filter` and `width` arguments.
	                stringify(null, value) === "1" &&
	                stringify([1, 2], null, 1) == "[\n 1,\n 2\n]" &&
	                // JSON 2, Prototype <= 1.7, and older WebKit builds incorrectly
	                // serialize extended years.
	                stringify(new Date(-8.64e15)) == '"-271821-04-20T00:00:00.000Z"' &&
	                // The milliseconds are optional in ES 5, but required in 5.1.
	                stringify(new Date(8.64e15)) == '"+275760-09-13T00:00:00.000Z"' &&
	                // Firefox <= 11.0 incorrectly serializes years prior to 0 as negative
	                // four-digit years instead of six-digit years. Credits: @Yaffle.
	                stringify(new Date(-621987552e5)) == '"-000001-01-01T00:00:00.000Z"' &&
	                // Safari <= 5.1.5 and Opera >= 10.53 incorrectly serialize millisecond
	                // values less than 1000. Credits: @Yaffle.
	                stringify(new Date(-1)) == '"1969-12-31T23:59:59.999Z"';
	            } catch (exception) {
	              stringifySupported = false;
	            }
	          }
	          isSupported = stringifySupported;
	        }
	        // Test `JSON.parse`.
	        if (name == "json-parse") {
	          var parse = exports.parse;
	          if (typeof parse == "function") {
	            try {
	              // FF 3.1b1, b2 will throw an exception if a bare literal is provided.
	              // Conforming implementations should also coerce the initial argument to
	              // a string prior to parsing.
	              if (parse("0") === 0 && !parse(false)) {
	                // Simple parsing test.
	                value = parse(serialized);
	                var parseSupported = value["a"].length == 5 && value["a"][0] === 1;
	                if (parseSupported) {
	                  try {
	                    // Safari <= 5.1.2 and FF 3.1b1 allow unescaped tabs in strings.
	                    parseSupported = !parse('"\t"');
	                  } catch (exception) {}
	                  if (parseSupported) {
	                    try {
	                      // FF 4.0 and 4.0.1 allow leading `+` signs and leading
	                      // decimal points. FF 4.0, 4.0.1, and IE 9-10 also allow
	                      // certain octal literals.
	                      parseSupported = parse("01") !== 1;
	                    } catch (exception) {}
	                  }
	                  if (parseSupported) {
	                    try {
	                      // FF 4.0, 4.0.1, and Rhino 1.7R3-R4 allow trailing decimal
	                      // points. These environments, along with FF 3.1b1 and 2,
	                      // also allow trailing commas in JSON objects and arrays.
	                      parseSupported = parse("1.") !== 1;
	                    } catch (exception) {}
	                  }
	                }
	              }
	            } catch (exception) {
	              parseSupported = false;
	            }
	          }
	          isSupported = parseSupported;
	        }
	      }
	      return has[name] = !!isSupported;
	    }

	    if (!has("json")) {
	      // Common `[[Class]]` name aliases.
	      var functionClass = "[object Function]",
	          dateClass = "[object Date]",
	          numberClass = "[object Number]",
	          stringClass = "[object String]",
	          arrayClass = "[object Array]",
	          booleanClass = "[object Boolean]";

	      // Detect incomplete support for accessing string characters by index.
	      var charIndexBuggy = has("bug-string-char-index");

	      // Define additional utility methods if the `Date` methods are buggy.
	      if (!isExtended) {
	        var floor = Math.floor;
	        // A mapping between the months of the year and the number of days between
	        // January 1st and the first of the respective month.
	        var Months = [0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334];
	        // Internal: Calculates the number of days between the Unix epoch and the
	        // first day of the given month.
	        var getDay = function (year, month) {
	          return Months[month] + 365 * (year - 1970) + floor((year - 1969 + (month = +(month > 1))) / 4) - floor((year - 1901 + month) / 100) + floor((year - 1601 + month) / 400);
	        };
	      }

	      // Internal: Determines if a property is a direct property of the given
	      // object. Delegates to the native `Object#hasOwnProperty` method.
	      if (!(isProperty = objectProto.hasOwnProperty)) {
	        isProperty = function (property) {
	          var members = {}, constructor;
	          if ((members.__proto__ = null, members.__proto__ = {
	            // The *proto* property cannot be set multiple times in recent
	            // versions of Firefox and SeaMonkey.
	            "toString": 1
	          }, members).toString != getClass) {
	            // Safari <= 2.0.3 doesn't implement `Object#hasOwnProperty`, but
	            // supports the mutable *proto* property.
	            isProperty = function (property) {
	              // Capture and break the object's prototype chain (see section 8.6.2
	              // of the ES 5.1 spec). The parenthesized expression prevents an
	              // unsafe transformation by the Closure Compiler.
	              var original = this.__proto__, result = property in (this.__proto__ = null, this);
	              // Restore the original prototype chain.
	              this.__proto__ = original;
	              return result;
	            };
	          } else {
	            // Capture a reference to the top-level `Object` constructor.
	            constructor = members.constructor;
	            // Use the `constructor` property to simulate `Object#hasOwnProperty` in
	            // other environments.
	            isProperty = function (property) {
	              var parent = (this.constructor || constructor).prototype;
	              return property in this && !(property in parent && this[property] === parent[property]);
	            };
	          }
	          members = null;
	          return isProperty.call(this, property);
	        };
	      }

	      // Internal: Normalizes the `for...in` iteration algorithm across
	      // environments. Each enumerated key is yielded to a `callback` function.
	      forEach = function (object, callback) {
	        var size = 0, Properties, members, property;

	        // Tests for bugs in the current environment's `for...in` algorithm. The
	        // `valueOf` property inherits the non-enumerable flag from
	        // `Object.prototype` in older versions of IE, Netscape, and Mozilla.
	        (Properties = function () {
	          this.valueOf = 0;
	        }).prototype.valueOf = 0;

	        // Iterate over a new instance of the `Properties` class.
	        members = new Properties();
	        for (property in members) {
	          // Ignore all properties inherited from `Object.prototype`.
	          if (isProperty.call(members, property)) {
	            size++;
	          }
	        }
	        Properties = members = null;

	        // Normalize the iteration algorithm.
	        if (!size) {
	          // A list of non-enumerable properties inherited from `Object.prototype`.
	          members = ["valueOf", "toString", "toLocaleString", "propertyIsEnumerable", "isPrototypeOf", "hasOwnProperty", "constructor"];
	          // IE <= 8, Mozilla 1.0, and Netscape 6.2 ignore shadowed non-enumerable
	          // properties.
	          forEach = function (object, callback) {
	            var isFunction = getClass.call(object) == functionClass, property, length;
	            var hasProperty = !isFunction && typeof object.constructor != "function" && objectTypes[typeof object.hasOwnProperty] && object.hasOwnProperty || isProperty;
	            for (property in object) {
	              // Gecko <= 1.0 enumerates the `prototype` property of functions under
	              // certain conditions; IE does not.
	              if (!(isFunction && property == "prototype") && hasProperty.call(object, property)) {
	                callback(property);
	              }
	            }
	            // Manually invoke the callback for each non-enumerable property.
	            for (length = members.length; property = members[--length]; hasProperty.call(object, property) && callback(property));
	          };
	        } else if (size == 2) {
	          // Safari <= 2.0.4 enumerates shadowed properties twice.
	          forEach = function (object, callback) {
	            // Create a set of iterated properties.
	            var members = {}, isFunction = getClass.call(object) == functionClass, property;
	            for (property in object) {
	              // Store each property name to prevent double enumeration. The
	              // `prototype` property of functions is not enumerated due to cross-
	              // environment inconsistencies.
	              if (!(isFunction && property == "prototype") && !isProperty.call(members, property) && (members[property] = 1) && isProperty.call(object, property)) {
	                callback(property);
	              }
	            }
	          };
	        } else {
	          // No bugs detected; use the standard `for...in` algorithm.
	          forEach = function (object, callback) {
	            var isFunction = getClass.call(object) == functionClass, property, isConstructor;
	            for (property in object) {
	              if (!(isFunction && property == "prototype") && isProperty.call(object, property) && !(isConstructor = property === "constructor")) {
	                callback(property);
	              }
	            }
	            // Manually invoke the callback for the `constructor` property due to
	            // cross-environment inconsistencies.
	            if (isConstructor || isProperty.call(object, (property = "constructor"))) {
	              callback(property);
	            }
	          };
	        }
	        return forEach(object, callback);
	      };

	      // Public: Serializes a JavaScript `value` as a JSON string. The optional
	      // `filter` argument may specify either a function that alters how object and
	      // array members are serialized, or an array of strings and numbers that
	      // indicates which properties should be serialized. The optional `width`
	      // argument may be either a string or number that specifies the indentation
	      // level of the output.
	      if (!has("json-stringify")) {
	        // Internal: A map of control characters and their escaped equivalents.
	        var Escapes = {
	          92: "\\\\",
	          34: '\\"',
	          8: "\\b",
	          12: "\\f",
	          10: "\\n",
	          13: "\\r",
	          9: "\\t"
	        };

	        // Internal: Converts `value` into a zero-padded string such that its
	        // length is at least equal to `width`. The `width` must be <= 6.
	        var leadingZeroes = "000000";
	        var toPaddedString = function (width, value) {
	          // The `|| 0` expression is necessary to work around a bug in
	          // Opera <= 7.54u2 where `0 == -0`, but `String(-0) !== "0"`.
	          return (leadingZeroes + (value || 0)).slice(-width);
	        };

	        // Internal: Double-quotes a string `value`, replacing all ASCII control
	        // characters (characters with code unit values between 0 and 31) with
	        // their escaped equivalents. This is an implementation of the
	        // `Quote(value)` operation defined in ES 5.1 section 15.12.3.
	        var unicodePrefix = "\\u00";
	        var quote = function (value) {
	          var result = '"', index = 0, length = value.length, useCharIndex = !charIndexBuggy || length > 10;
	          var symbols = useCharIndex && (charIndexBuggy ? value.split("") : value);
	          for (; index < length; index++) {
	            var charCode = value.charCodeAt(index);
	            // If the character is a control character, append its Unicode or
	            // shorthand escape sequence; otherwise, append the character as-is.
	            switch (charCode) {
	              case 8: case 9: case 10: case 12: case 13: case 34: case 92:
	                result += Escapes[charCode];
	                break;
	              default:
	                if (charCode < 32) {
	                  result += unicodePrefix + toPaddedString(2, charCode.toString(16));
	                  break;
	                }
	                result += useCharIndex ? symbols[index] : value.charAt(index);
	            }
	          }
	          return result + '"';
	        };

	        // Internal: Recursively serializes an object. Implements the
	        // `Str(key, holder)`, `JO(value)`, and `JA(value)` operations.
	        var serialize = function (property, object, callback, properties, whitespace, indentation, stack) {
	          var value, className, year, month, date, time, hours, minutes, seconds, milliseconds, results, element, index, length, prefix, result;
	          try {
	            // Necessary for host object support.
	            value = object[property];
	          } catch (exception) {}
	          if (typeof value == "object" && value) {
	            className = getClass.call(value);
	            if (className == dateClass && !isProperty.call(value, "toJSON")) {
	              if (value > -1 / 0 && value < 1 / 0) {
	                // Dates are serialized according to the `Date#toJSON` method
	                // specified in ES 5.1 section 15.9.5.44. See section 15.9.1.15
	                // for the ISO 8601 date time string format.
	                if (getDay) {
	                  // Manually compute the year, month, date, hours, minutes,
	                  // seconds, and milliseconds if the `getUTC*` methods are
	                  // buggy. Adapted from @Yaffle's `date-shim` project.
	                  date = floor(value / 864e5);
	                  for (year = floor(date / 365.2425) + 1970 - 1; getDay(year + 1, 0) <= date; year++);
	                  for (month = floor((date - getDay(year, 0)) / 30.42); getDay(year, month + 1) <= date; month++);
	                  date = 1 + date - getDay(year, month);
	                  // The `time` value specifies the time within the day (see ES
	                  // 5.1 section 15.9.1.2). The formula `(A % B + B) % B` is used
	                  // to compute `A modulo B`, as the `%` operator does not
	                  // correspond to the `modulo` operation for negative numbers.
	                  time = (value % 864e5 + 864e5) % 864e5;
	                  // The hours, minutes, seconds, and milliseconds are obtained by
	                  // decomposing the time within the day. See section 15.9.1.10.
	                  hours = floor(time / 36e5) % 24;
	                  minutes = floor(time / 6e4) % 60;
	                  seconds = floor(time / 1e3) % 60;
	                  milliseconds = time % 1e3;
	                } else {
	                  year = value.getUTCFullYear();
	                  month = value.getUTCMonth();
	                  date = value.getUTCDate();
	                  hours = value.getUTCHours();
	                  minutes = value.getUTCMinutes();
	                  seconds = value.getUTCSeconds();
	                  milliseconds = value.getUTCMilliseconds();
	                }
	                // Serialize extended years correctly.
	                value = (year <= 0 || year >= 1e4 ? (year < 0 ? "-" : "+") + toPaddedString(6, year < 0 ? -year : year) : toPaddedString(4, year)) +
	                  "-" + toPaddedString(2, month + 1) + "-" + toPaddedString(2, date) +
	                  // Months, dates, hours, minutes, and seconds should have two
	                  // digits; milliseconds should have three.
	                  "T" + toPaddedString(2, hours) + ":" + toPaddedString(2, minutes) + ":" + toPaddedString(2, seconds) +
	                  // Milliseconds are optional in ES 5.0, but required in 5.1.
	                  "." + toPaddedString(3, milliseconds) + "Z";
	              } else {
	                value = null;
	              }
	            } else if (typeof value.toJSON == "function" && ((className != numberClass && className != stringClass && className != arrayClass) || isProperty.call(value, "toJSON"))) {
	              // Prototype <= 1.6.1 adds non-standard `toJSON` methods to the
	              // `Number`, `String`, `Date`, and `Array` prototypes. JSON 3
	              // ignores all `toJSON` methods on these objects unless they are
	              // defined directly on an instance.
	              value = value.toJSON(property);
	            }
	          }
	          if (callback) {
	            // If a replacement function was provided, call it to obtain the value
	            // for serialization.
	            value = callback.call(object, property, value);
	          }
	          if (value === null) {
	            return "null";
	          }
	          className = getClass.call(value);
	          if (className == booleanClass) {
	            // Booleans are represented literally.
	            return "" + value;
	          } else if (className == numberClass) {
	            // JSON numbers must be finite. `Infinity` and `NaN` are serialized as
	            // `"null"`.
	            return value > -1 / 0 && value < 1 / 0 ? "" + value : "null";
	          } else if (className == stringClass) {
	            // Strings are double-quoted and escaped.
	            return quote("" + value);
	          }
	          // Recursively serialize objects and arrays.
	          if (typeof value == "object") {
	            // Check for cyclic structures. This is a linear search; performance
	            // is inversely proportional to the number of unique nested objects.
	            for (length = stack.length; length--;) {
	              if (stack[length] === value) {
	                // Cyclic structures cannot be serialized by `JSON.stringify`.
	                throw TypeError();
	              }
	            }
	            // Add the object to the stack of traversed objects.
	            stack.push(value);
	            results = [];
	            // Save the current indentation level and indent one additional level.
	            prefix = indentation;
	            indentation += whitespace;
	            if (className == arrayClass) {
	              // Recursively serialize array elements.
	              for (index = 0, length = value.length; index < length; index++) {
	                element = serialize(index, value, callback, properties, whitespace, indentation, stack);
	                results.push(element === undef ? "null" : element);
	              }
	              result = results.length ? (whitespace ? "[\n" + indentation + results.join(",\n" + indentation) + "\n" + prefix + "]" : ("[" + results.join(",") + "]")) : "[]";
	            } else {
	              // Recursively serialize object members. Members are selected from
	              // either a user-specified list of property names, or the object
	              // itself.
	              forEach(properties || value, function (property) {
	                var element = serialize(property, value, callback, properties, whitespace, indentation, stack);
	                if (element !== undef) {
	                  // According to ES 5.1 section 15.12.3: "If `gap` {whitespace}
	                  // is not the empty string, let `member` {quote(property) + ":"}
	                  // be the concatenation of `member` and the `space` character."
	                  // The "`space` character" refers to the literal space
	                  // character, not the `space` {width} argument provided to
	                  // `JSON.stringify`.
	                  results.push(quote(property) + ":" + (whitespace ? " " : "") + element);
	                }
	              });
	              result = results.length ? (whitespace ? "{\n" + indentation + results.join(",\n" + indentation) + "\n" + prefix + "}" : ("{" + results.join(",") + "}")) : "{}";
	            }
	            // Remove the object from the traversed object stack.
	            stack.pop();
	            return result;
	          }
	        };

	        // Public: `JSON.stringify`. See ES 5.1 section 15.12.3.
	        exports.stringify = function (source, filter, width) {
	          var whitespace, callback, properties, className;
	          if (objectTypes[typeof filter] && filter) {
	            if ((className = getClass.call(filter)) == functionClass) {
	              callback = filter;
	            } else if (className == arrayClass) {
	              // Convert the property names array into a makeshift set.
	              properties = {};
	              for (var index = 0, length = filter.length, value; index < length; value = filter[index++], ((className = getClass.call(value)), className == stringClass || className == numberClass) && (properties[value] = 1));
	            }
	          }
	          if (width) {
	            if ((className = getClass.call(width)) == numberClass) {
	              // Convert the `width` to an integer and create a string containing
	              // `width` number of space characters.
	              if ((width -= width % 1) > 0) {
	                for (whitespace = "", width > 10 && (width = 10); whitespace.length < width; whitespace += " ");
	              }
	            } else if (className == stringClass) {
	              whitespace = width.length <= 10 ? width : width.slice(0, 10);
	            }
	          }
	          // Opera <= 7.54u2 discards the values associated with empty string keys
	          // (`""`) only if they are used directly within an object member list
	          // (e.g., `!("" in { "": 1})`).
	          return serialize("", (value = {}, value[""] = source, value), callback, properties, whitespace, "", []);
	        };
	      }

	      // Public: Parses a JSON source string.
	      if (!has("json-parse")) {
	        var fromCharCode = String.fromCharCode;

	        // Internal: A map of escaped control characters and their unescaped
	        // equivalents.
	        var Unescapes = {
	          92: "\\",
	          34: '"',
	          47: "/",
	          98: "\b",
	          116: "\t",
	          110: "\n",
	          102: "\f",
	          114: "\r"
	        };

	        // Internal: Stores the parser state.
	        var Index, Source;

	        // Internal: Resets the parser state and throws a `SyntaxError`.
	        var abort = function () {
	          Index = Source = null;
	          throw SyntaxError();
	        };

	        // Internal: Returns the next token, or `"$"` if the parser has reached
	        // the end of the source string. A token may be a string, number, `null`
	        // literal, or Boolean literal.
	        var lex = function () {
	          var source = Source, length = source.length, value, begin, position, isSigned, charCode;
	          while (Index < length) {
	            charCode = source.charCodeAt(Index);
	            switch (charCode) {
	              case 9: case 10: case 13: case 32:
	                // Skip whitespace tokens, including tabs, carriage returns, line
	                // feeds, and space characters.
	                Index++;
	                break;
	              case 123: case 125: case 91: case 93: case 58: case 44:
	                // Parse a punctuator token (`{`, `}`, `[`, `]`, `:`, or `,`) at
	                // the current position.
	                value = charIndexBuggy ? source.charAt(Index) : source[Index];
	                Index++;
	                return value;
	              case 34:
	                // `"` delimits a JSON string; advance to the next character and
	                // begin parsing the string. String tokens are prefixed with the
	                // sentinel `@` character to distinguish them from punctuators and
	                // end-of-string tokens.
	                for (value = "@", Index++; Index < length;) {
	                  charCode = source.charCodeAt(Index);
	                  if (charCode < 32) {
	                    // Unescaped ASCII control characters (those with a code unit
	                    // less than the space character) are not permitted.
	                    abort();
	                  } else if (charCode == 92) {
	                    // A reverse solidus (`\`) marks the beginning of an escaped
	                    // control character (including `"`, `\`, and `/`) or Unicode
	                    // escape sequence.
	                    charCode = source.charCodeAt(++Index);
	                    switch (charCode) {
	                      case 92: case 34: case 47: case 98: case 116: case 110: case 102: case 114:
	                        // Revive escaped control characters.
	                        value += Unescapes[charCode];
	                        Index++;
	                        break;
	                      case 117:
	                        // `\u` marks the beginning of a Unicode escape sequence.
	                        // Advance to the first character and validate the
	                        // four-digit code point.
	                        begin = ++Index;
	                        for (position = Index + 4; Index < position; Index++) {
	                          charCode = source.charCodeAt(Index);
	                          // A valid sequence comprises four hexdigits (case-
	                          // insensitive) that form a single hexadecimal value.
	                          if (!(charCode >= 48 && charCode <= 57 || charCode >= 97 && charCode <= 102 || charCode >= 65 && charCode <= 70)) {
	                            // Invalid Unicode escape sequence.
	                            abort();
	                          }
	                        }
	                        // Revive the escaped character.
	                        value += fromCharCode("0x" + source.slice(begin, Index));
	                        break;
	                      default:
	                        // Invalid escape sequence.
	                        abort();
	                    }
	                  } else {
	                    if (charCode == 34) {
	                      // An unescaped double-quote character marks the end of the
	                      // string.
	                      break;
	                    }
	                    charCode = source.charCodeAt(Index);
	                    begin = Index;
	                    // Optimize for the common case where a string is valid.
	                    while (charCode >= 32 && charCode != 92 && charCode != 34) {
	                      charCode = source.charCodeAt(++Index);
	                    }
	                    // Append the string as-is.
	                    value += source.slice(begin, Index);
	                  }
	                }
	                if (source.charCodeAt(Index) == 34) {
	                  // Advance to the next character and return the revived string.
	                  Index++;
	                  return value;
	                }
	                // Unterminated string.
	                abort();
	              default:
	                // Parse numbers and literals.
	                begin = Index;
	                // Advance past the negative sign, if one is specified.
	                if (charCode == 45) {
	                  isSigned = true;
	                  charCode = source.charCodeAt(++Index);
	                }
	                // Parse an integer or floating-point value.
	                if (charCode >= 48 && charCode <= 57) {
	                  // Leading zeroes are interpreted as octal literals.
	                  if (charCode == 48 && ((charCode = source.charCodeAt(Index + 1)), charCode >= 48 && charCode <= 57)) {
	                    // Illegal octal literal.
	                    abort();
	                  }
	                  isSigned = false;
	                  // Parse the integer component.
	                  for (; Index < length && ((charCode = source.charCodeAt(Index)), charCode >= 48 && charCode <= 57); Index++);
	                  // Floats cannot contain a leading decimal point; however, this
	                  // case is already accounted for by the parser.
	                  if (source.charCodeAt(Index) == 46) {
	                    position = ++Index;
	                    // Parse the decimal component.
	                    for (; position < length && ((charCode = source.charCodeAt(position)), charCode >= 48 && charCode <= 57); position++);
	                    if (position == Index) {
	                      // Illegal trailing decimal.
	                      abort();
	                    }
	                    Index = position;
	                  }
	                  // Parse exponents. The `e` denoting the exponent is
	                  // case-insensitive.
	                  charCode = source.charCodeAt(Index);
	                  if (charCode == 101 || charCode == 69) {
	                    charCode = source.charCodeAt(++Index);
	                    // Skip past the sign following the exponent, if one is
	                    // specified.
	                    if (charCode == 43 || charCode == 45) {
	                      Index++;
	                    }
	                    // Parse the exponential component.
	                    for (position = Index; position < length && ((charCode = source.charCodeAt(position)), charCode >= 48 && charCode <= 57); position++);
	                    if (position == Index) {
	                      // Illegal empty exponent.
	                      abort();
	                    }
	                    Index = position;
	                  }
	                  // Coerce the parsed value to a JavaScript number.
	                  return +source.slice(begin, Index);
	                }
	                // A negative sign may only precede numbers.
	                if (isSigned) {
	                  abort();
	                }
	                // `true`, `false`, and `null` literals.
	                if (source.slice(Index, Index + 4) == "true") {
	                  Index += 4;
	                  return true;
	                } else if (source.slice(Index, Index + 5) == "false") {
	                  Index += 5;
	                  return false;
	                } else if (source.slice(Index, Index + 4) == "null") {
	                  Index += 4;
	                  return null;
	                }
	                // Unrecognized token.
	                abort();
	            }
	          }
	          // Return the sentinel `$` character if the parser has reached the end
	          // of the source string.
	          return "$";
	        };

	        // Internal: Parses a JSON `value` token.
	        var get = function (value) {
	          var results, hasMembers;
	          if (value == "$") {
	            // Unexpected end of input.
	            abort();
	          }
	          if (typeof value == "string") {
	            if ((charIndexBuggy ? value.charAt(0) : value[0]) == "@") {
	              // Remove the sentinel `@` character.
	              return value.slice(1);
	            }
	            // Parse object and array literals.
	            if (value == "[") {
	              // Parses a JSON array, returning a new JavaScript array.
	              results = [];
	              for (;; hasMembers || (hasMembers = true)) {
	                value = lex();
	                // A closing square bracket marks the end of the array literal.
	                if (value == "]") {
	                  break;
	                }
	                // If the array literal contains elements, the current token
	                // should be a comma separating the previous element from the
	                // next.
	                if (hasMembers) {
	                  if (value == ",") {
	                    value = lex();
	                    if (value == "]") {
	                      // Unexpected trailing `,` in array literal.
	                      abort();
	                    }
	                  } else {
	                    // A `,` must separate each array element.
	                    abort();
	                  }
	                }
	                // Elisions and leading commas are not permitted.
	                if (value == ",") {
	                  abort();
	                }
	                results.push(get(value));
	              }
	              return results;
	            } else if (value == "{") {
	              // Parses a JSON object, returning a new JavaScript object.
	              results = {};
	              for (;; hasMembers || (hasMembers = true)) {
	                value = lex();
	                // A closing curly brace marks the end of the object literal.
	                if (value == "}") {
	                  break;
	                }
	                // If the object literal contains members, the current token
	                // should be a comma separator.
	                if (hasMembers) {
	                  if (value == ",") {
	                    value = lex();
	                    if (value == "}") {
	                      // Unexpected trailing `,` in object literal.
	                      abort();
	                    }
	                  } else {
	                    // A `,` must separate each object member.
	                    abort();
	                  }
	                }
	                // Leading commas are not permitted, object property names must be
	                // double-quoted strings, and a `:` must separate each property
	                // name and value.
	                if (value == "," || typeof value != "string" || (charIndexBuggy ? value.charAt(0) : value[0]) != "@" || lex() != ":") {
	                  abort();
	                }
	                results[value.slice(1)] = get(lex());
	              }
	              return results;
	            }
	            // Unexpected token encountered.
	            abort();
	          }
	          return value;
	        };

	        // Internal: Updates a traversed object member.
	        var update = function (source, property, callback) {
	          var element = walk(source, property, callback);
	          if (element === undef) {
	            delete source[property];
	          } else {
	            source[property] = element;
	          }
	        };

	        // Internal: Recursively traverses a parsed JSON object, invoking the
	        // `callback` function for each value. This is an implementation of the
	        // `Walk(holder, name)` operation defined in ES 5.1 section 15.12.2.
	        var walk = function (source, property, callback) {
	          var value = source[property], length;
	          if (typeof value == "object" && value) {
	            // `forEach` can't be used to traverse an array in Opera <= 8.54
	            // because its `Object#hasOwnProperty` implementation returns `false`
	            // for array indices (e.g., `![1, 2, 3].hasOwnProperty("0")`).
	            if (getClass.call(value) == arrayClass) {
	              for (length = value.length; length--;) {
	                update(value, length, callback);
	              }
	            } else {
	              forEach(value, function (property) {
	                update(value, property, callback);
	              });
	            }
	          }
	          return callback.call(source, property, value);
	        };

	        // Public: `JSON.parse`. See ES 5.1 section 15.12.2.
	        exports.parse = function (source, callback) {
	          var result, value;
	          Index = 0;
	          Source = "" + source;
	          result = get(lex());
	          // If a JSON string contains multiple tokens, it is invalid.
	          if (lex() != "$") {
	            abort();
	          }
	          // Reset the parser state.
	          Index = Source = null;
	          return callback && getClass.call(callback) == functionClass ? walk((value = {}, value[""] = result, value), "", callback) : result;
	        };
	      }
	    }

	    exports["runInContext"] = runInContext;
	    return exports;
	  }

	  if (freeExports && !isLoader) {
	    // Export for CommonJS environments.
	    runInContext(root, freeExports);
	  } else {
	    // Export for web browsers and JavaScript engines.
	    var nativeJSON = root.JSON,
	        previousJSON = root["JSON3"],
	        isRestored = false;

	    var JSON3 = runInContext(root, (root["JSON3"] = {
	      // Public: Restores the original value of the global `JSON` object and
	      // returns a reference to the `JSON3` object.
	      "noConflict": function () {
	        if (!isRestored) {
	          isRestored = true;
	          root.JSON = nativeJSON;
	          root["JSON3"] = previousJSON;
	          nativeJSON = previousJSON = null;
	        }
	        return JSON3;
	      }
	    }));

	    root.JSON = {
	      "parse": JSON3.parse,
	      "stringify": JSON3.stringify
	    };
	  }

	  // Export for asynchronous module loaders.
	  if (isLoader) {
	    !(__WEBPACK_AMD_DEFINE_RESULT__ = function () {
	      return JSON3;
	    }.call(exports, __webpack_require__, exports, module), __WEBPACK_AMD_DEFINE_RESULT__ !== undefined && (module.exports = __WEBPACK_AMD_DEFINE_RESULT__));
	  }
	}).call(this);

	/* WEBPACK VAR INJECTION */}.call(exports, __webpack_require__(76)(module), (function() { return this; }())))

/***/ },
/* 76 */
/***/ function(module, exports) {

	module.exports = function(module) {
		if(!module.webpackPolyfill) {
			module.deprecate = function() {};
			module.paths = [];
			// module.parent = undefined by default
			module.children = [];
			module.webpackPolyfill = 1;
		}
		return module;
	}


/***/ },
/* 77 */
/***/ function(module, exports) {

	/* WEBPACK VAR INJECTION */(function(__webpack_amd_options__) {module.exports = __webpack_amd_options__;

	/* WEBPACK VAR INJECTION */}.call(exports, {}))

/***/ },
/* 78 */
/***/ function(module, exports) {

	module.exports = Array.isArray || function (arr) {
	  return Object.prototype.toString.call(arr) == '[object Array]';
	};


/***/ },
/* 79 */
/***/ function(module, exports) {

	
	/**
	 * Expose `Emitter`.
	 */

	module.exports = Emitter;

	/**
	 * Initialize a new `Emitter`.
	 *
	 * @api public
	 */

	function Emitter(obj) {
	  if (obj) return mixin(obj);
	};

	/**
	 * Mixin the emitter properties.
	 *
	 * @param {Object} obj
	 * @return {Object}
	 * @api private
	 */

	function mixin(obj) {
	  for (var key in Emitter.prototype) {
	    obj[key] = Emitter.prototype[key];
	  }
	  return obj;
	}

	/**
	 * Listen on the given `event` with `fn`.
	 *
	 * @param {String} event
	 * @param {Function} fn
	 * @return {Emitter}
	 * @api public
	 */

	Emitter.prototype.on =
	Emitter.prototype.addEventListener = function(event, fn){
	  this._callbacks = this._callbacks || {};
	  (this._callbacks[event] = this._callbacks[event] || [])
	    .push(fn);
	  return this;
	};

	/**
	 * Adds an `event` listener that will be invoked a single
	 * time then automatically removed.
	 *
	 * @param {String} event
	 * @param {Function} fn
	 * @return {Emitter}
	 * @api public
	 */

	Emitter.prototype.once = function(event, fn){
	  var self = this;
	  this._callbacks = this._callbacks || {};

	  function on() {
	    self.off(event, on);
	    fn.apply(this, arguments);
	  }

	  on.fn = fn;
	  this.on(event, on);
	  return this;
	};

	/**
	 * Remove the given callback for `event` or all
	 * registered callbacks.
	 *
	 * @param {String} event
	 * @param {Function} fn
	 * @return {Emitter}
	 * @api public
	 */

	Emitter.prototype.off =
	Emitter.prototype.removeListener =
	Emitter.prototype.removeAllListeners =
	Emitter.prototype.removeEventListener = function(event, fn){
	  this._callbacks = this._callbacks || {};

	  // all
	  if (0 == arguments.length) {
	    this._callbacks = {};
	    return this;
	  }

	  // specific event
	  var callbacks = this._callbacks[event];
	  if (!callbacks) return this;

	  // remove all handlers
	  if (1 == arguments.length) {
	    delete this._callbacks[event];
	    return this;
	  }

	  // remove specific handler
	  var cb;
	  for (var i = 0; i < callbacks.length; i++) {
	    cb = callbacks[i];
	    if (cb === fn || cb.fn === fn) {
	      callbacks.splice(i, 1);
	      break;
	    }
	  }
	  return this;
	};

	/**
	 * Emit `event` with the given args.
	 *
	 * @param {String} event
	 * @param {Mixed} ...
	 * @return {Emitter}
	 */

	Emitter.prototype.emit = function(event){
	  this._callbacks = this._callbacks || {};
	  var args = [].slice.call(arguments, 1)
	    , callbacks = this._callbacks[event];

	  if (callbacks) {
	    callbacks = callbacks.slice(0);
	    for (var i = 0, len = callbacks.length; i < len; ++i) {
	      callbacks[i].apply(this, args);
	    }
	  }

	  return this;
	};

	/**
	 * Return array of callbacks for `event`.
	 *
	 * @param {String} event
	 * @return {Array}
	 * @api public
	 */

	Emitter.prototype.listeners = function(event){
	  this._callbacks = this._callbacks || {};
	  return this._callbacks[event] || [];
	};

	/**
	 * Check if this emitter has `event` handlers.
	 *
	 * @param {String} event
	 * @return {Boolean}
	 * @api public
	 */

	Emitter.prototype.hasListeners = function(event){
	  return !! this.listeners(event).length;
	};


/***/ },
/* 80 */
/***/ function(module, exports, __webpack_require__) {

	/* WEBPACK VAR INJECTION */(function(global) {/*global Blob,File*/

	/**
	 * Module requirements
	 */

	var isArray = __webpack_require__(78);
	var isBuf = __webpack_require__(81);

	/**
	 * Replaces every Buffer | ArrayBuffer in packet with a numbered placeholder.
	 * Anything with blobs or files should be fed through removeBlobs before coming
	 * here.
	 *
	 * @param {Object} packet - socket.io event packet
	 * @return {Object} with deconstructed packet and list of buffers
	 * @api public
	 */

	exports.deconstructPacket = function(packet){
	  var buffers = [];
	  var packetData = packet.data;

	  function _deconstructPacket(data) {
	    if (!data) return data;

	    if (isBuf(data)) {
	      var placeholder = { _placeholder: true, num: buffers.length };
	      buffers.push(data);
	      return placeholder;
	    } else if (isArray(data)) {
	      var newData = new Array(data.length);
	      for (var i = 0; i < data.length; i++) {
	        newData[i] = _deconstructPacket(data[i]);
	      }
	      return newData;
	    } else if ('object' == typeof data && !(data instanceof Date)) {
	      var newData = {};
	      for (var key in data) {
	        newData[key] = _deconstructPacket(data[key]);
	      }
	      return newData;
	    }
	    return data;
	  }

	  var pack = packet;
	  pack.data = _deconstructPacket(packetData);
	  pack.attachments = buffers.length; // number of binary 'attachments'
	  return {packet: pack, buffers: buffers};
	};

	/**
	 * Reconstructs a binary packet from its placeholder packet and buffers
	 *
	 * @param {Object} packet - event packet with placeholders
	 * @param {Array} buffers - binary buffers to put in placeholder positions
	 * @return {Object} reconstructed packet
	 * @api public
	 */

	exports.reconstructPacket = function(packet, buffers) {
	  var curPlaceHolder = 0;

	  function _reconstructPacket(data) {
	    if (data && data._placeholder) {
	      var buf = buffers[data.num]; // appropriate buffer (should be natural order anyway)
	      return buf;
	    } else if (isArray(data)) {
	      for (var i = 0; i < data.length; i++) {
	        data[i] = _reconstructPacket(data[i]);
	      }
	      return data;
	    } else if (data && 'object' == typeof data) {
	      for (var key in data) {
	        data[key] = _reconstructPacket(data[key]);
	      }
	      return data;
	    }
	    return data;
	  }

	  packet.data = _reconstructPacket(packet.data);
	  packet.attachments = undefined; // no longer useful
	  return packet;
	};

	/**
	 * Asynchronously removes Blobs or Files from data via
	 * FileReader's readAsArrayBuffer method. Used before encoding
	 * data as msgpack. Calls callback with the blobless data.
	 *
	 * @param {Object} data
	 * @param {Function} callback
	 * @api private
	 */

	exports.removeBlobs = function(data, callback) {
	  function _removeBlobs(obj, curKey, containingObject) {
	    if (!obj) return obj;

	    // convert any blob
	    if ((global.Blob && obj instanceof Blob) ||
	        (global.File && obj instanceof File)) {
	      pendingBlobs++;

	      // async filereader
	      var fileReader = new FileReader();
	      fileReader.onload = function() { // this.result == arraybuffer
	        if (containingObject) {
	          containingObject[curKey] = this.result;
	        }
	        else {
	          bloblessData = this.result;
	        }

	        // if nothing pending its callback time
	        if(! --pendingBlobs) {
	          callback(bloblessData);
	        }
	      };

	      fileReader.readAsArrayBuffer(obj); // blob -> arraybuffer
	    } else if (isArray(obj)) { // handle array
	      for (var i = 0; i < obj.length; i++) {
	        _removeBlobs(obj[i], i, obj);
	      }
	    } else if (obj && 'object' == typeof obj && !isBuf(obj)) { // and object
	      for (var key in obj) {
	        _removeBlobs(obj[key], key, obj);
	      }
	    }
	  }

	  var pendingBlobs = 0;
	  var bloblessData = data;
	  _removeBlobs(bloblessData);
	  if (!pendingBlobs) {
	    callback(bloblessData);
	  }
	};

	/* WEBPACK VAR INJECTION */}.call(exports, (function() { return this; }())))

/***/ },
/* 81 */
/***/ function(module, exports) {

	/* WEBPACK VAR INJECTION */(function(global) {
	module.exports = isBuf;

	/**
	 * Returns true if obj is a buffer or an arraybuffer.
	 *
	 * @api private
	 */

	function isBuf(obj) {
	  return (global.Buffer && global.Buffer.isBuffer(obj)) ||
	         (global.ArrayBuffer && obj instanceof ArrayBuffer);
	}

	/* WEBPACK VAR INJECTION */}.call(exports, (function() { return this; }())))

/***/ },
/* 82 */
/***/ function(module, exports, __webpack_require__) {

	
	/**
	 * Module dependencies.
	 */

	var eio = __webpack_require__(83);
	var Socket = __webpack_require__(110);
	var Emitter = __webpack_require__(111);
	var parser = __webpack_require__(74);
	var on = __webpack_require__(113);
	var bind = __webpack_require__(114);
	var debug = __webpack_require__(71)('socket.io-client:manager');
	var indexOf = __webpack_require__(108);
	var Backoff = __webpack_require__(117);

	/**
	 * IE6+ hasOwnProperty
	 */

	var has = Object.prototype.hasOwnProperty;

	/**
	 * Module exports
	 */

	module.exports = Manager;

	/**
	 * `Manager` constructor.
	 *
	 * @param {String} engine instance or engine uri/opts
	 * @param {Object} options
	 * @api public
	 */

	function Manager(uri, opts){
	  if (!(this instanceof Manager)) return new Manager(uri, opts);
	  if (uri && ('object' == typeof uri)) {
	    opts = uri;
	    uri = undefined;
	  }
	  opts = opts || {};

	  opts.path = opts.path || '/socket.io';
	  this.nsps = {};
	  this.subs = [];
	  this.opts = opts;
	  this.reconnection(opts.reconnection !== false);
	  this.reconnectionAttempts(opts.reconnectionAttempts || Infinity);
	  this.reconnectionDelay(opts.reconnectionDelay || 1000);
	  this.reconnectionDelayMax(opts.reconnectionDelayMax || 5000);
	  this.randomizationFactor(opts.randomizationFactor || 0.5);
	  this.backoff = new Backoff({
	    min: this.reconnectionDelay(),
	    max: this.reconnectionDelayMax(),
	    jitter: this.randomizationFactor()
	  });
	  this.timeout(null == opts.timeout ? 20000 : opts.timeout);
	  this.readyState = 'closed';
	  this.uri = uri;
	  this.connecting = [];
	  this.lastPing = null;
	  this.encoding = false;
	  this.packetBuffer = [];
	  this.encoder = new parser.Encoder();
	  this.decoder = new parser.Decoder();
	  this.autoConnect = opts.autoConnect !== false;
	  if (this.autoConnect) this.open();
	}

	/**
	 * Propagate given event to sockets and emit on `this`
	 *
	 * @api private
	 */

	Manager.prototype.emitAll = function() {
	  this.emit.apply(this, arguments);
	  for (var nsp in this.nsps) {
	    if (has.call(this.nsps, nsp)) {
	      this.nsps[nsp].emit.apply(this.nsps[nsp], arguments);
	    }
	  }
	};

	/**
	 * Update `socket.id` of all sockets
	 *
	 * @api private
	 */

	Manager.prototype.updateSocketIds = function(){
	  for (var nsp in this.nsps) {
	    if (has.call(this.nsps, nsp)) {
	      this.nsps[nsp].id = this.engine.id;
	    }
	  }
	};

	/**
	 * Mix in `Emitter`.
	 */

	Emitter(Manager.prototype);

	/**
	 * Sets the `reconnection` config.
	 *
	 * @param {Boolean} true/false if it should automatically reconnect
	 * @return {Manager} self or value
	 * @api public
	 */

	Manager.prototype.reconnection = function(v){
	  if (!arguments.length) return this._reconnection;
	  this._reconnection = !!v;
	  return this;
	};

	/**
	 * Sets the reconnection attempts config.
	 *
	 * @param {Number} max reconnection attempts before giving up
	 * @return {Manager} self or value
	 * @api public
	 */

	Manager.prototype.reconnectionAttempts = function(v){
	  if (!arguments.length) return this._reconnectionAttempts;
	  this._reconnectionAttempts = v;
	  return this;
	};

	/**
	 * Sets the delay between reconnections.
	 *
	 * @param {Number} delay
	 * @return {Manager} self or value
	 * @api public
	 */

	Manager.prototype.reconnectionDelay = function(v){
	  if (!arguments.length) return this._reconnectionDelay;
	  this._reconnectionDelay = v;
	  this.backoff && this.backoff.setMin(v);
	  return this;
	};

	Manager.prototype.randomizationFactor = function(v){
	  if (!arguments.length) return this._randomizationFactor;
	  this._randomizationFactor = v;
	  this.backoff && this.backoff.setJitter(v);
	  return this;
	};

	/**
	 * Sets the maximum delay between reconnections.
	 *
	 * @param {Number} delay
	 * @return {Manager} self or value
	 * @api public
	 */

	Manager.prototype.reconnectionDelayMax = function(v){
	  if (!arguments.length) return this._reconnectionDelayMax;
	  this._reconnectionDelayMax = v;
	  this.backoff && this.backoff.setMax(v);
	  return this;
	};

	/**
	 * Sets the connection timeout. `false` to disable
	 *
	 * @return {Manager} self or value
	 * @api public
	 */

	Manager.prototype.timeout = function(v){
	  if (!arguments.length) return this._timeout;
	  this._timeout = v;
	  return this;
	};

	/**
	 * Starts trying to reconnect if reconnection is enabled and we have not
	 * started reconnecting yet
	 *
	 * @api private
	 */

	Manager.prototype.maybeReconnectOnOpen = function() {
	  // Only try to reconnect if it's the first time we're connecting
	  if (!this.reconnecting && this._reconnection && this.backoff.attempts === 0) {
	    // keeps reconnection from firing twice for the same reconnection loop
	    this.reconnect();
	  }
	};


	/**
	 * Sets the current transport `socket`.
	 *
	 * @param {Function} optional, callback
	 * @return {Manager} self
	 * @api public
	 */

	Manager.prototype.open =
	Manager.prototype.connect = function(fn){
	  debug('readyState %s', this.readyState);
	  if (~this.readyState.indexOf('open')) return this;

	  debug('opening %s', this.uri);
	  this.engine = eio(this.uri, this.opts);
	  var socket = this.engine;
	  var self = this;
	  this.readyState = 'opening';
	  this.skipReconnect = false;

	  // emit `open`
	  var openSub = on(socket, 'open', function() {
	    self.onopen();
	    fn && fn();
	  });

	  // emit `connect_error`
	  var errorSub = on(socket, 'error', function(data){
	    debug('connect_error');
	    self.cleanup();
	    self.readyState = 'closed';
	    self.emitAll('connect_error', data);
	    if (fn) {
	      var err = new Error('Connection error');
	      err.data = data;
	      fn(err);
	    } else {
	      // Only do this if there is no fn to handle the error
	      self.maybeReconnectOnOpen();
	    }
	  });

	  // emit `connect_timeout`
	  if (false !== this._timeout) {
	    var timeout = this._timeout;
	    debug('connect attempt will timeout after %d', timeout);

	    // set timer
	    var timer = setTimeout(function(){
	      debug('connect attempt timed out after %d', timeout);
	      openSub.destroy();
	      socket.close();
	      socket.emit('error', 'timeout');
	      self.emitAll('connect_timeout', timeout);
	    }, timeout);

	    this.subs.push({
	      destroy: function(){
	        clearTimeout(timer);
	      }
	    });
	  }

	  this.subs.push(openSub);
	  this.subs.push(errorSub);

	  return this;
	};

	/**
	 * Called upon transport open.
	 *
	 * @api private
	 */

	Manager.prototype.onopen = function(){
	  debug('open');

	  // clear old subs
	  this.cleanup();

	  // mark as open
	  this.readyState = 'open';
	  this.emit('open');

	  // add new subs
	  var socket = this.engine;
	  this.subs.push(on(socket, 'data', bind(this, 'ondata')));
	  this.subs.push(on(socket, 'ping', bind(this, 'onping')));
	  this.subs.push(on(socket, 'pong', bind(this, 'onpong')));
	  this.subs.push(on(socket, 'error', bind(this, 'onerror')));
	  this.subs.push(on(socket, 'close', bind(this, 'onclose')));
	  this.subs.push(on(this.decoder, 'decoded', bind(this, 'ondecoded')));
	};

	/**
	 * Called upon a ping.
	 *
	 * @api private
	 */

	Manager.prototype.onping = function(){
	  this.lastPing = new Date;
	  this.emitAll('ping');
	};

	/**
	 * Called upon a packet.
	 *
	 * @api private
	 */

	Manager.prototype.onpong = function(){
	  this.emitAll('pong', new Date - this.lastPing);
	};

	/**
	 * Called with data.
	 *
	 * @api private
	 */

	Manager.prototype.ondata = function(data){
	  this.decoder.add(data);
	};

	/**
	 * Called when parser fully decodes a packet.
	 *
	 * @api private
	 */

	Manager.prototype.ondecoded = function(packet) {
	  this.emit('packet', packet);
	};

	/**
	 * Called upon socket error.
	 *
	 * @api private
	 */

	Manager.prototype.onerror = function(err){
	  debug('error', err);
	  this.emitAll('error', err);
	};

	/**
	 * Creates a new socket for the given `nsp`.
	 *
	 * @return {Socket}
	 * @api public
	 */

	Manager.prototype.socket = function(nsp){
	  var socket = this.nsps[nsp];
	  if (!socket) {
	    socket = new Socket(this, nsp);
	    this.nsps[nsp] = socket;
	    var self = this;
	    socket.on('connecting', onConnecting);
	    socket.on('connect', function(){
	      socket.id = self.engine.id;
	    });

	    if (this.autoConnect) {
	      // manually call here since connecting evnet is fired before listening
	      onConnecting();
	    }
	  }

	  function onConnecting() {
	    if (!~indexOf(self.connecting, socket)) {
	      self.connecting.push(socket);
	    }
	  }

	  return socket;
	};

	/**
	 * Called upon a socket close.
	 *
	 * @param {Socket} socket
	 */

	Manager.prototype.destroy = function(socket){
	  var index = indexOf(this.connecting, socket);
	  if (~index) this.connecting.splice(index, 1);
	  if (this.connecting.length) return;

	  this.close();
	};

	/**
	 * Writes a packet.
	 *
	 * @param {Object} packet
	 * @api private
	 */

	Manager.prototype.packet = function(packet){
	  debug('writing packet %j', packet);
	  var self = this;

	  if (!self.encoding) {
	    // encode, then write to engine with result
	    self.encoding = true;
	    this.encoder.encode(packet, function(encodedPackets) {
	      for (var i = 0; i < encodedPackets.length; i++) {
	        self.engine.write(encodedPackets[i], packet.options);
	      }
	      self.encoding = false;
	      self.processPacketQueue();
	    });
	  } else { // add packet to the queue
	    self.packetBuffer.push(packet);
	  }
	};

	/**
	 * If packet buffer is non-empty, begins encoding the
	 * next packet in line.
	 *
	 * @api private
	 */

	Manager.prototype.processPacketQueue = function() {
	  if (this.packetBuffer.length > 0 && !this.encoding) {
	    var pack = this.packetBuffer.shift();
	    this.packet(pack);
	  }
	};

	/**
	 * Clean up transport subscriptions and packet buffer.
	 *
	 * @api private
	 */

	Manager.prototype.cleanup = function(){
	  debug('cleanup');

	  var sub;
	  while (sub = this.subs.shift()) sub.destroy();

	  this.packetBuffer = [];
	  this.encoding = false;
	  this.lastPing = null;

	  this.decoder.destroy();
	};

	/**
	 * Close the current socket.
	 *
	 * @api private
	 */

	Manager.prototype.close =
	Manager.prototype.disconnect = function(){
	  debug('disconnect');
	  this.skipReconnect = true;
	  this.reconnecting = false;
	  if ('opening' == this.readyState) {
	    // `onclose` will not fire because
	    // an open event never happened
	    this.cleanup();
	  }
	  this.backoff.reset();
	  this.readyState = 'closed';
	  if (this.engine) this.engine.close();
	};

	/**
	 * Called upon engine close.
	 *
	 * @api private
	 */

	Manager.prototype.onclose = function(reason){
	  debug('onclose');

	  this.cleanup();
	  this.backoff.reset();
	  this.readyState = 'closed';
	  this.emit('close', reason);

	  if (this._reconnection && !this.skipReconnect) {
	    this.reconnect();
	  }
	};

	/**
	 * Attempt a reconnection.
	 *
	 * @api private
	 */

	Manager.prototype.reconnect = function(){
	  if (this.reconnecting || this.skipReconnect) return this;

	  var self = this;

	  if (this.backoff.attempts >= this._reconnectionAttempts) {
	    debug('reconnect failed');
	    this.backoff.reset();
	    this.emitAll('reconnect_failed');
	    this.reconnecting = false;
	  } else {
	    var delay = this.backoff.duration();
	    debug('will wait %dms before reconnect attempt', delay);

	    this.reconnecting = true;
	    var timer = setTimeout(function(){
	      if (self.skipReconnect) return;

	      debug('attempting reconnect');
	      self.emitAll('reconnect_attempt', self.backoff.attempts);
	      self.emitAll('reconnecting', self.backoff.attempts);

	      // check again for the case socket closed in above events
	      if (self.skipReconnect) return;

	      self.open(function(err){
	        if (err) {
	          debug('reconnect attempt error');
	          self.reconnecting = false;
	          self.reconnect();
	          self.emitAll('reconnect_error', err.data);
	        } else {
	          debug('reconnect success');
	          self.onreconnect();
	        }
	      });
	    }, delay);

	    this.subs.push({
	      destroy: function(){
	        clearTimeout(timer);
	      }
	    });
	  }
	};

	/**
	 * Called upon successful reconnect.
	 *
	 * @api private
	 */

	Manager.prototype.onreconnect = function(){
	  var attempt = this.backoff.attempts;
	  this.reconnecting = false;
	  this.backoff.reset();
	  this.updateSocketIds();
	  this.emitAll('reconnect', attempt);
	};


/***/ },
/* 83 */
/***/ function(module, exports, __webpack_require__) {

	
	module.exports =  __webpack_require__(84);


/***/ },
/* 84 */
/***/ function(module, exports, __webpack_require__) {

	
	module.exports = __webpack_require__(85);

	/**
	 * Exports parser
	 *
	 * @api public
	 *
	 */
	module.exports.parser = __webpack_require__(92);


/***/ },
/* 85 */
/***/ function(module, exports, __webpack_require__) {

	/* WEBPACK VAR INJECTION */(function(global) {/**
	 * Module dependencies.
	 */

	var transports = __webpack_require__(86);
	var Emitter = __webpack_require__(101);
	var debug = __webpack_require__(71)('engine.io-client:socket');
	var index = __webpack_require__(108);
	var parser = __webpack_require__(92);
	var parseuri = __webpack_require__(70);
	var parsejson = __webpack_require__(109);
	var parseqs = __webpack_require__(102);

	/**
	 * Module exports.
	 */

	module.exports = Socket;

	/**
	 * Noop function.
	 *
	 * @api private
	 */

	function noop(){}

	/**
	 * Socket constructor.
	 *
	 * @param {String|Object} uri or options
	 * @param {Object} options
	 * @api public
	 */

	function Socket(uri, opts){
	  if (!(this instanceof Socket)) return new Socket(uri, opts);

	  opts = opts || {};

	  if (uri && 'object' == typeof uri) {
	    opts = uri;
	    uri = null;
	  }

	  if (uri) {
	    uri = parseuri(uri);
	    opts.hostname = uri.host;
	    opts.secure = uri.protocol == 'https' || uri.protocol == 'wss';
	    opts.port = uri.port;
	    if (uri.query) opts.query = uri.query;
	  } else if (opts.host) {
	    opts.hostname = parseuri(opts.host).host;
	  }

	  this.secure = null != opts.secure ? opts.secure :
	    (global.location && 'https:' == location.protocol);

	  if (opts.hostname && !opts.port) {
	    // if no port is specified manually, use the protocol default
	    opts.port = this.secure ? '443' : '80';
	  }

	  this.agent = opts.agent || false;
	  this.hostname = opts.hostname ||
	    (global.location ? location.hostname : 'localhost');
	  this.port = opts.port || (global.location && location.port ?
	       location.port :
	       (this.secure ? 443 : 80));
	  this.query = opts.query || {};
	  if ('string' == typeof this.query) this.query = parseqs.decode(this.query);
	  this.upgrade = false !== opts.upgrade;
	  this.path = (opts.path || '/engine.io').replace(/\/$/, '') + '/';
	  this.forceJSONP = !!opts.forceJSONP;
	  this.jsonp = false !== opts.jsonp;
	  this.forceBase64 = !!opts.forceBase64;
	  this.enablesXDR = !!opts.enablesXDR;
	  this.timestampParam = opts.timestampParam || 't';
	  this.timestampRequests = opts.timestampRequests;
	  this.transports = opts.transports || ['polling', 'websocket'];
	  this.readyState = '';
	  this.writeBuffer = [];
	  this.policyPort = opts.policyPort || 843;
	  this.rememberUpgrade = opts.rememberUpgrade || false;
	  this.binaryType = null;
	  this.onlyBinaryUpgrades = opts.onlyBinaryUpgrades;
	  this.perMessageDeflate = false !== opts.perMessageDeflate ? (opts.perMessageDeflate || {}) : false;

	  if (true === this.perMessageDeflate) this.perMessageDeflate = {};
	  if (this.perMessageDeflate && null == this.perMessageDeflate.threshold) {
	    this.perMessageDeflate.threshold = 1024;
	  }

	  // SSL options for Node.js client
	  this.pfx = opts.pfx || null;
	  this.key = opts.key || null;
	  this.passphrase = opts.passphrase || null;
	  this.cert = opts.cert || null;
	  this.ca = opts.ca || null;
	  this.ciphers = opts.ciphers || null;
	  this.rejectUnauthorized = opts.rejectUnauthorized === undefined ? null : opts.rejectUnauthorized;

	  // other options for Node.js client
	  var freeGlobal = typeof global == 'object' && global;
	  if (freeGlobal.global === freeGlobal) {
	    if (opts.extraHeaders && Object.keys(opts.extraHeaders).length > 0) {
	      this.extraHeaders = opts.extraHeaders;
	    }
	  }

	  this.open();
	}

	Socket.priorWebsocketSuccess = false;

	/**
	 * Mix in `Emitter`.
	 */

	Emitter(Socket.prototype);

	/**
	 * Protocol version.
	 *
	 * @api public
	 */

	Socket.protocol = parser.protocol; // this is an int

	/**
	 * Expose deps for legacy compatibility
	 * and standalone browser access.
	 */

	Socket.Socket = Socket;
	Socket.Transport = __webpack_require__(91);
	Socket.transports = __webpack_require__(86);
	Socket.parser = __webpack_require__(92);

	/**
	 * Creates transport of the given type.
	 *
	 * @param {String} transport name
	 * @return {Transport}
	 * @api private
	 */

	Socket.prototype.createTransport = function (name) {
	  debug('creating transport "%s"', name);
	  var query = clone(this.query);

	  // append engine.io protocol identifier
	  query.EIO = parser.protocol;

	  // transport name
	  query.transport = name;

	  // session id if we already have one
	  if (this.id) query.sid = this.id;

	  var transport = new transports[name]({
	    agent: this.agent,
	    hostname: this.hostname,
	    port: this.port,
	    secure: this.secure,
	    path: this.path,
	    query: query,
	    forceJSONP: this.forceJSONP,
	    jsonp: this.jsonp,
	    forceBase64: this.forceBase64,
	    enablesXDR: this.enablesXDR,
	    timestampRequests: this.timestampRequests,
	    timestampParam: this.timestampParam,
	    policyPort: this.policyPort,
	    socket: this,
	    pfx: this.pfx,
	    key: this.key,
	    passphrase: this.passphrase,
	    cert: this.cert,
	    ca: this.ca,
	    ciphers: this.ciphers,
	    rejectUnauthorized: this.rejectUnauthorized,
	    perMessageDeflate: this.perMessageDeflate,
	    extraHeaders: this.extraHeaders
	  });

	  return transport;
	};

	function clone (obj) {
	  var o = {};
	  for (var i in obj) {
	    if (obj.hasOwnProperty(i)) {
	      o[i] = obj[i];
	    }
	  }
	  return o;
	}

	/**
	 * Initializes transport to use and starts probe.
	 *
	 * @api private
	 */
	Socket.prototype.open = function () {
	  var transport;
	  if (this.rememberUpgrade && Socket.priorWebsocketSuccess && this.transports.indexOf('websocket') != -1) {
	    transport = 'websocket';
	  } else if (0 === this.transports.length) {
	    // Emit error on next tick so it can be listened to
	    var self = this;
	    setTimeout(function() {
	      self.emit('error', 'No transports available');
	    }, 0);
	    return;
	  } else {
	    transport = this.transports[0];
	  }
	  this.readyState = 'opening';

	  // Retry with the next transport if the transport is disabled (jsonp: false)
	  try {
	    transport = this.createTransport(transport);
	  } catch (e) {
	    this.transports.shift();
	    this.open();
	    return;
	  }

	  transport.open();
	  this.setTransport(transport);
	};

	/**
	 * Sets the current transport. Disables the existing one (if any).
	 *
	 * @api private
	 */

	Socket.prototype.setTransport = function(transport){
	  debug('setting transport %s', transport.name);
	  var self = this;

	  if (this.transport) {
	    debug('clearing existing transport %s', this.transport.name);
	    this.transport.removeAllListeners();
	  }

	  // set up transport
	  this.transport = transport;

	  // set up transport listeners
	  transport
	  .on('drain', function(){
	    self.onDrain();
	  })
	  .on('packet', function(packet){
	    self.onPacket(packet);
	  })
	  .on('error', function(e){
	    self.onError(e);
	  })
	  .on('close', function(){
	    self.onClose('transport close');
	  });
	};

	/**
	 * Probes a transport.
	 *
	 * @param {String} transport name
	 * @api private
	 */

	Socket.prototype.probe = function (name) {
	  debug('probing transport "%s"', name);
	  var transport = this.createTransport(name, { probe: 1 })
	    , failed = false
	    , self = this;

	  Socket.priorWebsocketSuccess = false;

	  function onTransportOpen(){
	    if (self.onlyBinaryUpgrades) {
	      var upgradeLosesBinary = !this.supportsBinary && self.transport.supportsBinary;
	      failed = failed || upgradeLosesBinary;
	    }
	    if (failed) return;

	    debug('probe transport "%s" opened', name);
	    transport.send([{ type: 'ping', data: 'probe' }]);
	    transport.once('packet', function (msg) {
	      if (failed) return;
	      if ('pong' == msg.type && 'probe' == msg.data) {
	        debug('probe transport "%s" pong', name);
	        self.upgrading = true;
	        self.emit('upgrading', transport);
	        if (!transport) return;
	        Socket.priorWebsocketSuccess = 'websocket' == transport.name;

	        debug('pausing current transport "%s"', self.transport.name);
	        self.transport.pause(function () {
	          if (failed) return;
	          if ('closed' == self.readyState) return;
	          debug('changing transport and sending upgrade packet');

	          cleanup();

	          self.setTransport(transport);
	          transport.send([{ type: 'upgrade' }]);
	          self.emit('upgrade', transport);
	          transport = null;
	          self.upgrading = false;
	          self.flush();
	        });
	      } else {
	        debug('probe transport "%s" failed', name);
	        var err = new Error('probe error');
	        err.transport = transport.name;
	        self.emit('upgradeError', err);
	      }
	    });
	  }

	  function freezeTransport() {
	    if (failed) return;

	    // Any callback called by transport should be ignored since now
	    failed = true;

	    cleanup();

	    transport.close();
	    transport = null;
	  }

	  //Handle any error that happens while probing
	  function onerror(err) {
	    var error = new Error('probe error: ' + err);
	    error.transport = transport.name;

	    freezeTransport();

	    debug('probe transport "%s" failed because of error: %s', name, err);

	    self.emit('upgradeError', error);
	  }

	  function onTransportClose(){
	    onerror("transport closed");
	  }

	  //When the socket is closed while we're probing
	  function onclose(){
	    onerror("socket closed");
	  }

	  //When the socket is upgraded while we're probing
	  function onupgrade(to){
	    if (transport && to.name != transport.name) {
	      debug('"%s" works - aborting "%s"', to.name, transport.name);
	      freezeTransport();
	    }
	  }

	  //Remove all listeners on the transport and on self
	  function cleanup(){
	    transport.removeListener('open', onTransportOpen);
	    transport.removeListener('error', onerror);
	    transport.removeListener('close', onTransportClose);
	    self.removeListener('close', onclose);
	    self.removeListener('upgrading', onupgrade);
	  }

	  transport.once('open', onTransportOpen);
	  transport.once('error', onerror);
	  transport.once('close', onTransportClose);

	  this.once('close', onclose);
	  this.once('upgrading', onupgrade);

	  transport.open();

	};

	/**
	 * Called when connection is deemed open.
	 *
	 * @api public
	 */

	Socket.prototype.onOpen = function () {
	  debug('socket open');
	  this.readyState = 'open';
	  Socket.priorWebsocketSuccess = 'websocket' == this.transport.name;
	  this.emit('open');
	  this.flush();

	  // we check for `readyState` in case an `open`
	  // listener already closed the socket
	  if ('open' == this.readyState && this.upgrade && this.transport.pause) {
	    debug('starting upgrade probes');
	    for (var i = 0, l = this.upgrades.length; i < l; i++) {
	      this.probe(this.upgrades[i]);
	    }
	  }
	};

	/**
	 * Handles a packet.
	 *
	 * @api private
	 */

	Socket.prototype.onPacket = function (packet) {
	  if ('opening' == this.readyState || 'open' == this.readyState) {
	    debug('socket receive: type "%s", data "%s"', packet.type, packet.data);

	    this.emit('packet', packet);

	    // Socket is live - any packet counts
	    this.emit('heartbeat');

	    switch (packet.type) {
	      case 'open':
	        this.onHandshake(parsejson(packet.data));
	        break;

	      case 'pong':
	        this.setPing();
	        this.emit('pong');
	        break;

	      case 'error':
	        var err = new Error('server error');
	        err.code = packet.data;
	        this.onError(err);
	        break;

	      case 'message':
	        this.emit('data', packet.data);
	        this.emit('message', packet.data);
	        break;
	    }
	  } else {
	    debug('packet received with socket readyState "%s"', this.readyState);
	  }
	};

	/**
	 * Called upon handshake completion.
	 *
	 * @param {Object} handshake obj
	 * @api private
	 */

	Socket.prototype.onHandshake = function (data) {
	  this.emit('handshake', data);
	  this.id = data.sid;
	  this.transport.query.sid = data.sid;
	  this.upgrades = this.filterUpgrades(data.upgrades);
	  this.pingInterval = data.pingInterval;
	  this.pingTimeout = data.pingTimeout;
	  this.onOpen();
	  // In case open handler closes socket
	  if  ('closed' == this.readyState) return;
	  this.setPing();

	  // Prolong liveness of socket on heartbeat
	  this.removeListener('heartbeat', this.onHeartbeat);
	  this.on('heartbeat', this.onHeartbeat);
	};

	/**
	 * Resets ping timeout.
	 *
	 * @api private
	 */

	Socket.prototype.onHeartbeat = function (timeout) {
	  clearTimeout(this.pingTimeoutTimer);
	  var self = this;
	  self.pingTimeoutTimer = setTimeout(function () {
	    if ('closed' == self.readyState) return;
	    self.onClose('ping timeout');
	  }, timeout || (self.pingInterval + self.pingTimeout));
	};

	/**
	 * Pings server every `this.pingInterval` and expects response
	 * within `this.pingTimeout` or closes connection.
	 *
	 * @api private
	 */

	Socket.prototype.setPing = function () {
	  var self = this;
	  clearTimeout(self.pingIntervalTimer);
	  self.pingIntervalTimer = setTimeout(function () {
	    debug('writing ping packet - expecting pong within %sms', self.pingTimeout);
	    self.ping();
	    self.onHeartbeat(self.pingTimeout);
	  }, self.pingInterval);
	};

	/**
	* Sends a ping packet.
	*
	* @api private
	*/

	Socket.prototype.ping = function () {
	  var self = this;
	  this.sendPacket('ping', function(){
	    self.emit('ping');
	  });
	};

	/**
	 * Called on `drain` event
	 *
	 * @api private
	 */

	Socket.prototype.onDrain = function() {
	  this.writeBuffer.splice(0, this.prevBufferLen);

	  // setting prevBufferLen = 0 is very important
	  // for example, when upgrading, upgrade packet is sent over,
	  // and a nonzero prevBufferLen could cause problems on `drain`
	  this.prevBufferLen = 0;

	  if (0 === this.writeBuffer.length) {
	    this.emit('drain');
	  } else {
	    this.flush();
	  }
	};

	/**
	 * Flush write buffers.
	 *
	 * @api private
	 */

	Socket.prototype.flush = function () {
	  if ('closed' != this.readyState && this.transport.writable &&
	    !this.upgrading && this.writeBuffer.length) {
	    debug('flushing %d packets in socket', this.writeBuffer.length);
	    this.transport.send(this.writeBuffer);
	    // keep track of current length of writeBuffer
	    // splice writeBuffer and callbackBuffer on `drain`
	    this.prevBufferLen = this.writeBuffer.length;
	    this.emit('flush');
	  }
	};

	/**
	 * Sends a message.
	 *
	 * @param {String} message.
	 * @param {Function} callback function.
	 * @param {Object} options.
	 * @return {Socket} for chaining.
	 * @api public
	 */

	Socket.prototype.write =
	Socket.prototype.send = function (msg, options, fn) {
	  this.sendPacket('message', msg, options, fn);
	  return this;
	};

	/**
	 * Sends a packet.
	 *
	 * @param {String} packet type.
	 * @param {String} data.
	 * @param {Object} options.
	 * @param {Function} callback function.
	 * @api private
	 */

	Socket.prototype.sendPacket = function (type, data, options, fn) {
	  if('function' == typeof data) {
	    fn = data;
	    data = undefined;
	  }

	  if ('function' == typeof options) {
	    fn = options;
	    options = null;
	  }

	  if ('closing' == this.readyState || 'closed' == this.readyState) {
	    return;
	  }

	  options = options || {};
	  options.compress = false !== options.compress;

	  var packet = {
	    type: type,
	    data: data,
	    options: options
	  };
	  this.emit('packetCreate', packet);
	  this.writeBuffer.push(packet);
	  if (fn) this.once('flush', fn);
	  this.flush();
	};

	/**
	 * Closes the connection.
	 *
	 * @api private
	 */

	Socket.prototype.close = function () {
	  if ('opening' == this.readyState || 'open' == this.readyState) {
	    this.readyState = 'closing';

	    var self = this;

	    if (this.writeBuffer.length) {
	      this.once('drain', function() {
	        if (this.upgrading) {
	          waitForUpgrade();
	        } else {
	          close();
	        }
	      });
	    } else if (this.upgrading) {
	      waitForUpgrade();
	    } else {
	      close();
	    }
	  }

	  function close() {
	    self.onClose('forced close');
	    debug('socket closing - telling transport to close');
	    self.transport.close();
	  }

	  function cleanupAndClose() {
	    self.removeListener('upgrade', cleanupAndClose);
	    self.removeListener('upgradeError', cleanupAndClose);
	    close();
	  }

	  function waitForUpgrade() {
	    // wait for upgrade to finish since we can't send packets while pausing a transport
	    self.once('upgrade', cleanupAndClose);
	    self.once('upgradeError', cleanupAndClose);
	  }

	  return this;
	};

	/**
	 * Called upon transport error
	 *
	 * @api private
	 */

	Socket.prototype.onError = function (err) {
	  debug('socket error %j', err);
	  Socket.priorWebsocketSuccess = false;
	  this.emit('error', err);
	  this.onClose('transport error', err);
	};

	/**
	 * Called upon transport close.
	 *
	 * @api private
	 */

	Socket.prototype.onClose = function (reason, desc) {
	  if ('opening' == this.readyState || 'open' == this.readyState || 'closing' == this.readyState) {
	    debug('socket close with reason: "%s"', reason);
	    var self = this;

	    // clear timers
	    clearTimeout(this.pingIntervalTimer);
	    clearTimeout(this.pingTimeoutTimer);

	    // stop event from firing again for transport
	    this.transport.removeAllListeners('close');

	    // ensure transport won't stay open
	    this.transport.close();

	    // ignore further transport communication
	    this.transport.removeAllListeners();

	    // set ready state
	    this.readyState = 'closed';

	    // clear session id
	    this.id = null;

	    // emit close event
	    this.emit('close', reason, desc);

	    // clean buffers after, so users can still
	    // grab the buffers on `close` event
	    self.writeBuffer = [];
	    self.prevBufferLen = 0;
	  }
	};

	/**
	 * Filters upgrades, returning only those matching client transports.
	 *
	 * @param {Array} server upgrades
	 * @api private
	 *
	 */

	Socket.prototype.filterUpgrades = function (upgrades) {
	  var filteredUpgrades = [];
	  for (var i = 0, j = upgrades.length; i<j; i++) {
	    if (~index(this.transports, upgrades[i])) filteredUpgrades.push(upgrades[i]);
	  }
	  return filteredUpgrades;
	};

	/* WEBPACK VAR INJECTION */}.call(exports, (function() { return this; }())))

/***/ },
/* 86 */
/***/ function(module, exports, __webpack_require__) {

	/* WEBPACK VAR INJECTION */(function(global) {/**
	 * Module dependencies
	 */

	var XMLHttpRequest = __webpack_require__(87);
	var XHR = __webpack_require__(89);
	var JSONP = __webpack_require__(105);
	var websocket = __webpack_require__(106);

	/**
	 * Export transports.
	 */

	exports.polling = polling;
	exports.websocket = websocket;

	/**
	 * Polling transport polymorphic constructor.
	 * Decides on xhr vs jsonp based on feature detection.
	 *
	 * @api private
	 */

	function polling(opts){
	  var xhr;
	  var xd = false;
	  var xs = false;
	  var jsonp = false !== opts.jsonp;

	  if (global.location) {
	    var isSSL = 'https:' == location.protocol;
	    var port = location.port;

	    // some user agents have empty `location.port`
	    if (!port) {
	      port = isSSL ? 443 : 80;
	    }

	    xd = opts.hostname != location.hostname || port != opts.port;
	    xs = opts.secure != isSSL;
	  }

	  opts.xdomain = xd;
	  opts.xscheme = xs;
	  xhr = new XMLHttpRequest(opts);

	  if ('open' in xhr && !opts.forceJSONP) {
	    return new XHR(opts);
	  } else {
	    if (!jsonp) throw new Error('JSONP disabled');
	    return new JSONP(opts);
	  }
	}

	/* WEBPACK VAR INJECTION */}.call(exports, (function() { return this; }())))

/***/ },
/* 87 */
/***/ function(module, exports, __webpack_require__) {

	// browser shim for xmlhttprequest module
	var hasCORS = __webpack_require__(88);

	module.exports = function(opts) {
	  var xdomain = opts.xdomain;

	  // scheme must be same when usign XDomainRequest
	  // http://blogs.msdn.com/b/ieinternals/archive/2010/05/13/xdomainrequest-restrictions-limitations-and-workarounds.aspx
	  var xscheme = opts.xscheme;

	  // XDomainRequest has a flow of not sending cookie, therefore it should be disabled as a default.
	  // https://github.com/Automattic/engine.io-client/pull/217
	  var enablesXDR = opts.enablesXDR;

	  // XMLHttpRequest can be disabled on IE
	  try {
	    if ('undefined' != typeof XMLHttpRequest && (!xdomain || hasCORS)) {
	      return new XMLHttpRequest();
	    }
	  } catch (e) { }

	  // Use XDomainRequest for IE8 if enablesXDR is true
	  // because loading bar keeps flashing when using jsonp-polling
	  // https://github.com/yujiosaka/socke.io-ie8-loading-example
	  try {
	    if ('undefined' != typeof XDomainRequest && !xscheme && enablesXDR) {
	      return new XDomainRequest();
	    }
	  } catch (e) { }

	  if (!xdomain) {
	    try {
	      return new ActiveXObject('Microsoft.XMLHTTP');
	    } catch(e) { }
	  }
	}


/***/ },
/* 88 */
/***/ function(module, exports) {

	
	/**
	 * Module exports.
	 *
	 * Logic borrowed from Modernizr:
	 *
	 *   - https://github.com/Modernizr/Modernizr/blob/master/feature-detects/cors.js
	 */

	try {
	  module.exports = typeof XMLHttpRequest !== 'undefined' &&
	    'withCredentials' in new XMLHttpRequest();
	} catch (err) {
	  // if XMLHttp support is disabled in IE then it will throw
	  // when trying to create
	  module.exports = false;
	}


/***/ },
/* 89 */
/***/ function(module, exports, __webpack_require__) {

	/* WEBPACK VAR INJECTION */(function(global) {/**
	 * Module requirements.
	 */

	var XMLHttpRequest = __webpack_require__(87);
	var Polling = __webpack_require__(90);
	var Emitter = __webpack_require__(101);
	var inherit = __webpack_require__(103);
	var debug = __webpack_require__(71)('engine.io-client:polling-xhr');

	/**
	 * Module exports.
	 */

	module.exports = XHR;
	module.exports.Request = Request;

	/**
	 * Empty function
	 */

	function empty(){}

	/**
	 * XHR Polling constructor.
	 *
	 * @param {Object} opts
	 * @api public
	 */

	function XHR(opts){
	  Polling.call(this, opts);

	  if (global.location) {
	    var isSSL = 'https:' == location.protocol;
	    var port = location.port;

	    // some user agents have empty `location.port`
	    if (!port) {
	      port = isSSL ? 443 : 80;
	    }

	    this.xd = opts.hostname != global.location.hostname ||
	      port != opts.port;
	    this.xs = opts.secure != isSSL;
	  } else {
	    this.extraHeaders = opts.extraHeaders;
	  }
	}

	/**
	 * Inherits from Polling.
	 */

	inherit(XHR, Polling);

	/**
	 * XHR supports binary
	 */

	XHR.prototype.supportsBinary = true;

	/**
	 * Creates a request.
	 *
	 * @param {String} method
	 * @api private
	 */

	XHR.prototype.request = function(opts){
	  opts = opts || {};
	  opts.uri = this.uri();
	  opts.xd = this.xd;
	  opts.xs = this.xs;
	  opts.agent = this.agent || false;
	  opts.supportsBinary = this.supportsBinary;
	  opts.enablesXDR = this.enablesXDR;

	  // SSL options for Node.js client
	  opts.pfx = this.pfx;
	  opts.key = this.key;
	  opts.passphrase = this.passphrase;
	  opts.cert = this.cert;
	  opts.ca = this.ca;
	  opts.ciphers = this.ciphers;
	  opts.rejectUnauthorized = this.rejectUnauthorized;

	  // other options for Node.js client
	  opts.extraHeaders = this.extraHeaders;

	  return new Request(opts);
	};

	/**
	 * Sends data.
	 *
	 * @param {String} data to send.
	 * @param {Function} called upon flush.
	 * @api private
	 */

	XHR.prototype.doWrite = function(data, fn){
	  var isBinary = typeof data !== 'string' && data !== undefined;
	  var req = this.request({ method: 'POST', data: data, isBinary: isBinary });
	  var self = this;
	  req.on('success', fn);
	  req.on('error', function(err){
	    self.onError('xhr post error', err);
	  });
	  this.sendXhr = req;
	};

	/**
	 * Starts a poll cycle.
	 *
	 * @api private
	 */

	XHR.prototype.doPoll = function(){
	  debug('xhr poll');
	  var req = this.request();
	  var self = this;
	  req.on('data', function(data){
	    self.onData(data);
	  });
	  req.on('error', function(err){
	    self.onError('xhr poll error', err);
	  });
	  this.pollXhr = req;
	};

	/**
	 * Request constructor
	 *
	 * @param {Object} options
	 * @api public
	 */

	function Request(opts){
	  this.method = opts.method || 'GET';
	  this.uri = opts.uri;
	  this.xd = !!opts.xd;
	  this.xs = !!opts.xs;
	  this.async = false !== opts.async;
	  this.data = undefined != opts.data ? opts.data : null;
	  this.agent = opts.agent;
	  this.isBinary = opts.isBinary;
	  this.supportsBinary = opts.supportsBinary;
	  this.enablesXDR = opts.enablesXDR;

	  // SSL options for Node.js client
	  this.pfx = opts.pfx;
	  this.key = opts.key;
	  this.passphrase = opts.passphrase;
	  this.cert = opts.cert;
	  this.ca = opts.ca;
	  this.ciphers = opts.ciphers;
	  this.rejectUnauthorized = opts.rejectUnauthorized;

	  // other options for Node.js client
	  this.extraHeaders = opts.extraHeaders;

	  this.create();
	}

	/**
	 * Mix in `Emitter`.
	 */

	Emitter(Request.prototype);

	/**
	 * Creates the XHR object and sends the request.
	 *
	 * @api private
	 */

	Request.prototype.create = function(){
	  var opts = { agent: this.agent, xdomain: this.xd, xscheme: this.xs, enablesXDR: this.enablesXDR };

	  // SSL options for Node.js client
	  opts.pfx = this.pfx;
	  opts.key = this.key;
	  opts.passphrase = this.passphrase;
	  opts.cert = this.cert;
	  opts.ca = this.ca;
	  opts.ciphers = this.ciphers;
	  opts.rejectUnauthorized = this.rejectUnauthorized;

	  var xhr = this.xhr = new XMLHttpRequest(opts);
	  var self = this;

	  try {
	    debug('xhr open %s: %s', this.method, this.uri);
	    xhr.open(this.method, this.uri, this.async);
	    try {
	      if (this.extraHeaders) {
	        xhr.setDisableHeaderCheck(true);
	        for (var i in this.extraHeaders) {
	          if (this.extraHeaders.hasOwnProperty(i)) {
	            xhr.setRequestHeader(i, this.extraHeaders[i]);
	          }
	        }
	      }
	    } catch (e) {}
	    if (this.supportsBinary) {
	      // This has to be done after open because Firefox is stupid
	      // http://stackoverflow.com/questions/13216903/get-binary-data-with-xmlhttprequest-in-a-firefox-extension
	      xhr.responseType = 'arraybuffer';
	    }

	    if ('POST' == this.method) {
	      try {
	        if (this.isBinary) {
	          xhr.setRequestHeader('Content-type', 'application/octet-stream');
	        } else {
	          xhr.setRequestHeader('Content-type', 'text/plain;charset=UTF-8');
	        }
	      } catch (e) {}
	    }

	    // ie6 check
	    if ('withCredentials' in xhr) {
	      xhr.withCredentials = true;
	    }

	    if (this.hasXDR()) {
	      xhr.onload = function(){
	        self.onLoad();
	      };
	      xhr.onerror = function(){
	        self.onError(xhr.responseText);
	      };
	    } else {
	      xhr.onreadystatechange = function(){
	        if (4 != xhr.readyState) return;
	        if (200 == xhr.status || 1223 == xhr.status) {
	          self.onLoad();
	        } else {
	          // make sure the `error` event handler that's user-set
	          // does not throw in the same tick and gets caught here
	          setTimeout(function(){
	            self.onError(xhr.status);
	          }, 0);
	        }
	      };
	    }

	    debug('xhr data %s', this.data);
	    xhr.send(this.data);
	  } catch (e) {
	    // Need to defer since .create() is called directly fhrom the constructor
	    // and thus the 'error' event can only be only bound *after* this exception
	    // occurs.  Therefore, also, we cannot throw here at all.
	    setTimeout(function() {
	      self.onError(e);
	    }, 0);
	    return;
	  }

	  if (global.document) {
	    this.index = Request.requestsCount++;
	    Request.requests[this.index] = this;
	  }
	};

	/**
	 * Called upon successful response.
	 *
	 * @api private
	 */

	Request.prototype.onSuccess = function(){
	  this.emit('success');
	  this.cleanup();
	};

	/**
	 * Called if we have data.
	 *
	 * @api private
	 */

	Request.prototype.onData = function(data){
	  this.emit('data', data);
	  this.onSuccess();
	};

	/**
	 * Called upon error.
	 *
	 * @api private
	 */

	Request.prototype.onError = function(err){
	  this.emit('error', err);
	  this.cleanup(true);
	};

	/**
	 * Cleans up house.
	 *
	 * @api private
	 */

	Request.prototype.cleanup = function(fromError){
	  if ('undefined' == typeof this.xhr || null === this.xhr) {
	    return;
	  }
	  // xmlhttprequest
	  if (this.hasXDR()) {
	    this.xhr.onload = this.xhr.onerror = empty;
	  } else {
	    this.xhr.onreadystatechange = empty;
	  }

	  if (fromError) {
	    try {
	      this.xhr.abort();
	    } catch(e) {}
	  }

	  if (global.document) {
	    delete Request.requests[this.index];
	  }

	  this.xhr = null;
	};

	/**
	 * Called upon load.
	 *
	 * @api private
	 */

	Request.prototype.onLoad = function(){
	  var data;
	  try {
	    var contentType;
	    try {
	      contentType = this.xhr.getResponseHeader('Content-Type').split(';')[0];
	    } catch (e) {}
	    if (contentType === 'application/octet-stream') {
	      data = this.xhr.response;
	    } else {
	      if (!this.supportsBinary) {
	        data = this.xhr.responseText;
	      } else {
	        try {
	          data = String.fromCharCode.apply(null, new Uint8Array(this.xhr.response));
	        } catch (e) {
	          var ui8Arr = new Uint8Array(this.xhr.response);
	          var dataArray = [];
	          for (var idx = 0, length = ui8Arr.length; idx < length; idx++) {
	            dataArray.push(ui8Arr[idx]);
	          }

	          data = String.fromCharCode.apply(null, dataArray);
	        }
	      }
	    }
	  } catch (e) {
	    this.onError(e);
	  }
	  if (null != data) {
	    this.onData(data);
	  }
	};

	/**
	 * Check if it has XDomainRequest.
	 *
	 * @api private
	 */

	Request.prototype.hasXDR = function(){
	  return 'undefined' !== typeof global.XDomainRequest && !this.xs && this.enablesXDR;
	};

	/**
	 * Aborts the request.
	 *
	 * @api public
	 */

	Request.prototype.abort = function(){
	  this.cleanup();
	};

	/**
	 * Aborts pending requests when unloading the window. This is needed to prevent
	 * memory leaks (e.g. when using IE) and to ensure that no spurious error is
	 * emitted.
	 */

	if (global.document) {
	  Request.requestsCount = 0;
	  Request.requests = {};
	  if (global.attachEvent) {
	    global.attachEvent('onunload', unloadHandler);
	  } else if (global.addEventListener) {
	    global.addEventListener('beforeunload', unloadHandler, false);
	  }
	}

	function unloadHandler() {
	  for (var i in Request.requests) {
	    if (Request.requests.hasOwnProperty(i)) {
	      Request.requests[i].abort();
	    }
	  }
	}

	/* WEBPACK VAR INJECTION */}.call(exports, (function() { return this; }())))

/***/ },
/* 90 */
/***/ function(module, exports, __webpack_require__) {

	/**
	 * Module dependencies.
	 */

	var Transport = __webpack_require__(91);
	var parseqs = __webpack_require__(102);
	var parser = __webpack_require__(92);
	var inherit = __webpack_require__(103);
	var yeast = __webpack_require__(104);
	var debug = __webpack_require__(71)('engine.io-client:polling');

	/**
	 * Module exports.
	 */

	module.exports = Polling;

	/**
	 * Is XHR2 supported?
	 */

	var hasXHR2 = (function() {
	  var XMLHttpRequest = __webpack_require__(87);
	  var xhr = new XMLHttpRequest({ xdomain: false });
	  return null != xhr.responseType;
	})();

	/**
	 * Polling interface.
	 *
	 * @param {Object} opts
	 * @api private
	 */

	function Polling(opts){
	  var forceBase64 = (opts && opts.forceBase64);
	  if (!hasXHR2 || forceBase64) {
	    this.supportsBinary = false;
	  }
	  Transport.call(this, opts);
	}

	/**
	 * Inherits from Transport.
	 */

	inherit(Polling, Transport);

	/**
	 * Transport name.
	 */

	Polling.prototype.name = 'polling';

	/**
	 * Opens the socket (triggers polling). We write a PING message to determine
	 * when the transport is open.
	 *
	 * @api private
	 */

	Polling.prototype.doOpen = function(){
	  this.poll();
	};

	/**
	 * Pauses polling.
	 *
	 * @param {Function} callback upon buffers are flushed and transport is paused
	 * @api private
	 */

	Polling.prototype.pause = function(onPause){
	  var pending = 0;
	  var self = this;

	  this.readyState = 'pausing';

	  function pause(){
	    debug('paused');
	    self.readyState = 'paused';
	    onPause();
	  }

	  if (this.polling || !this.writable) {
	    var total = 0;

	    if (this.polling) {
	      debug('we are currently polling - waiting to pause');
	      total++;
	      this.once('pollComplete', function(){
	        debug('pre-pause polling complete');
	        --total || pause();
	      });
	    }

	    if (!this.writable) {
	      debug('we are currently writing - waiting to pause');
	      total++;
	      this.once('drain', function(){
	        debug('pre-pause writing complete');
	        --total || pause();
	      });
	    }
	  } else {
	    pause();
	  }
	};

	/**
	 * Starts polling cycle.
	 *
	 * @api public
	 */

	Polling.prototype.poll = function(){
	  debug('polling');
	  this.polling = true;
	  this.doPoll();
	  this.emit('poll');
	};

	/**
	 * Overloads onData to detect payloads.
	 *
	 * @api private
	 */

	Polling.prototype.onData = function(data){
	  var self = this;
	  debug('polling got data %s', data);
	  var callback = function(packet, index, total) {
	    // if its the first message we consider the transport open
	    if ('opening' == self.readyState) {
	      self.onOpen();
	    }

	    // if its a close packet, we close the ongoing requests
	    if ('close' == packet.type) {
	      self.onClose();
	      return false;
	    }

	    // otherwise bypass onData and handle the message
	    self.onPacket(packet);
	  };

	  // decode payload
	  parser.decodePayload(data, this.socket.binaryType, callback);

	  // if an event did not trigger closing
	  if ('closed' != this.readyState) {
	    // if we got data we're not polling
	    this.polling = false;
	    this.emit('pollComplete');

	    if ('open' == this.readyState) {
	      this.poll();
	    } else {
	      debug('ignoring poll - transport state "%s"', this.readyState);
	    }
	  }
	};

	/**
	 * For polling, send a close packet.
	 *
	 * @api private
	 */

	Polling.prototype.doClose = function(){
	  var self = this;

	  function close(){
	    debug('writing close packet');
	    self.write([{ type: 'close' }]);
	  }

	  if ('open' == this.readyState) {
	    debug('transport open - closing');
	    close();
	  } else {
	    // in case we're trying to close while
	    // handshaking is in progress (GH-164)
	    debug('transport not open - deferring close');
	    this.once('open', close);
	  }
	};

	/**
	 * Writes a packets payload.
	 *
	 * @param {Array} data packets
	 * @param {Function} drain callback
	 * @api private
	 */

	Polling.prototype.write = function(packets){
	  var self = this;
	  this.writable = false;
	  var callbackfn = function() {
	    self.writable = true;
	    self.emit('drain');
	  };

	  var self = this;
	  parser.encodePayload(packets, this.supportsBinary, function(data) {
	    self.doWrite(data, callbackfn);
	  });
	};

	/**
	 * Generates uri for connection.
	 *
	 * @api private
	 */

	Polling.prototype.uri = function(){
	  var query = this.query || {};
	  var schema = this.secure ? 'https' : 'http';
	  var port = '';

	  // cache busting is forced
	  if (false !== this.timestampRequests) {
	    query[this.timestampParam] = yeast();
	  }

	  if (!this.supportsBinary && !query.sid) {
	    query.b64 = 1;
	  }

	  query = parseqs.encode(query);

	  // avoid port if default for schema
	  if (this.port && (('https' == schema && this.port != 443) ||
	     ('http' == schema && this.port != 80))) {
	    port = ':' + this.port;
	  }

	  // prepend ? to query
	  if (query.length) {
	    query = '?' + query;
	  }

	  var ipv6 = this.hostname.indexOf(':') !== -1;
	  return schema + '://' + (ipv6 ? '[' + this.hostname + ']' : this.hostname) + port + this.path + query;
	};


/***/ },
/* 91 */
/***/ function(module, exports, __webpack_require__) {

	/**
	 * Module dependencies.
	 */

	var parser = __webpack_require__(92);
	var Emitter = __webpack_require__(101);

	/**
	 * Module exports.
	 */

	module.exports = Transport;

	/**
	 * Transport abstract constructor.
	 *
	 * @param {Object} options.
	 * @api private
	 */

	function Transport (opts) {
	  this.path = opts.path;
	  this.hostname = opts.hostname;
	  this.port = opts.port;
	  this.secure = opts.secure;
	  this.query = opts.query;
	  this.timestampParam = opts.timestampParam;
	  this.timestampRequests = opts.timestampRequests;
	  this.readyState = '';
	  this.agent = opts.agent || false;
	  this.socket = opts.socket;
	  this.enablesXDR = opts.enablesXDR;

	  // SSL options for Node.js client
	  this.pfx = opts.pfx;
	  this.key = opts.key;
	  this.passphrase = opts.passphrase;
	  this.cert = opts.cert;
	  this.ca = opts.ca;
	  this.ciphers = opts.ciphers;
	  this.rejectUnauthorized = opts.rejectUnauthorized;

	  // other options for Node.js client
	  this.extraHeaders = opts.extraHeaders;
	}

	/**
	 * Mix in `Emitter`.
	 */

	Emitter(Transport.prototype);

	/**
	 * Emits an error.
	 *
	 * @param {String} str
	 * @return {Transport} for chaining
	 * @api public
	 */

	Transport.prototype.onError = function (msg, desc) {
	  var err = new Error(msg);
	  err.type = 'TransportError';
	  err.description = desc;
	  this.emit('error', err);
	  return this;
	};

	/**
	 * Opens the transport.
	 *
	 * @api public
	 */

	Transport.prototype.open = function () {
	  if ('closed' == this.readyState || '' == this.readyState) {
	    this.readyState = 'opening';
	    this.doOpen();
	  }

	  return this;
	};

	/**
	 * Closes the transport.
	 *
	 * @api private
	 */

	Transport.prototype.close = function () {
	  if ('opening' == this.readyState || 'open' == this.readyState) {
	    this.doClose();
	    this.onClose();
	  }

	  return this;
	};

	/**
	 * Sends multiple packets.
	 *
	 * @param {Array} packets
	 * @api private
	 */

	Transport.prototype.send = function(packets){
	  if ('open' == this.readyState) {
	    this.write(packets);
	  } else {
	    throw new Error('Transport not open');
	  }
	};

	/**
	 * Called upon open
	 *
	 * @api private
	 */

	Transport.prototype.onOpen = function () {
	  this.readyState = 'open';
	  this.writable = true;
	  this.emit('open');
	};

	/**
	 * Called with data.
	 *
	 * @param {String} data
	 * @api private
	 */

	Transport.prototype.onData = function(data){
	  var packet = parser.decodePacket(data, this.socket.binaryType);
	  this.onPacket(packet);
	};

	/**
	 * Called with a decoded packet.
	 */

	Transport.prototype.onPacket = function (packet) {
	  this.emit('packet', packet);
	};

	/**
	 * Called upon close.
	 *
	 * @api private
	 */

	Transport.prototype.onClose = function () {
	  this.readyState = 'closed';
	  this.emit('close');
	};


/***/ },
/* 92 */
/***/ function(module, exports, __webpack_require__) {

	/* WEBPACK VAR INJECTION */(function(global) {/**
	 * Module dependencies.
	 */

	var keys = __webpack_require__(93);
	var hasBinary = __webpack_require__(94);
	var sliceBuffer = __webpack_require__(96);
	var base64encoder = __webpack_require__(97);
	var after = __webpack_require__(98);
	var utf8 = __webpack_require__(99);

	/**
	 * Check if we are running an android browser. That requires us to use
	 * ArrayBuffer with polling transports...
	 *
	 * http://ghinda.net/jpeg-blob-ajax-android/
	 */

	var isAndroid = navigator.userAgent.match(/Android/i);

	/**
	 * Check if we are running in PhantomJS.
	 * Uploading a Blob with PhantomJS does not work correctly, as reported here:
	 * https://github.com/ariya/phantomjs/issues/11395
	 * @type boolean
	 */
	var isPhantomJS = /PhantomJS/i.test(navigator.userAgent);

	/**
	 * When true, avoids using Blobs to encode payloads.
	 * @type boolean
	 */
	var dontSendBlobs = isAndroid || isPhantomJS;

	/**
	 * Current protocol version.
	 */

	exports.protocol = 3;

	/**
	 * Packet types.
	 */

	var packets = exports.packets = {
	    open:     0    // non-ws
	  , close:    1    // non-ws
	  , ping:     2
	  , pong:     3
	  , message:  4
	  , upgrade:  5
	  , noop:     6
	};

	var packetslist = keys(packets);

	/**
	 * Premade error packet.
	 */

	var err = { type: 'error', data: 'parser error' };

	/**
	 * Create a blob api even for blob builder when vendor prefixes exist
	 */

	var Blob = __webpack_require__(100);

	/**
	 * Encodes a packet.
	 *
	 *     <packet type id> [ <data> ]
	 *
	 * Example:
	 *
	 *     5hello world
	 *     3
	 *     4
	 *
	 * Binary is encoded in an identical principle
	 *
	 * @api private
	 */

	exports.encodePacket = function (packet, supportsBinary, utf8encode, callback) {
	  if ('function' == typeof supportsBinary) {
	    callback = supportsBinary;
	    supportsBinary = false;
	  }

	  if ('function' == typeof utf8encode) {
	    callback = utf8encode;
	    utf8encode = null;
	  }

	  var data = (packet.data === undefined)
	    ? undefined
	    : packet.data.buffer || packet.data;

	  if (global.ArrayBuffer && data instanceof ArrayBuffer) {
	    return encodeArrayBuffer(packet, supportsBinary, callback);
	  } else if (Blob && data instanceof global.Blob) {
	    return encodeBlob(packet, supportsBinary, callback);
	  }

	  // might be an object with { base64: true, data: dataAsBase64String }
	  if (data && data.base64) {
	    return encodeBase64Object(packet, callback);
	  }

	  // Sending data as a utf-8 string
	  var encoded = packets[packet.type];

	  // data fragment is optional
	  if (undefined !== packet.data) {
	    encoded += utf8encode ? utf8.encode(String(packet.data)) : String(packet.data);
	  }

	  return callback('' + encoded);

	};

	function encodeBase64Object(packet, callback) {
	  // packet data is an object { base64: true, data: dataAsBase64String }
	  var message = 'b' + exports.packets[packet.type] + packet.data.data;
	  return callback(message);
	}

	/**
	 * Encode packet helpers for binary types
	 */

	function encodeArrayBuffer(packet, supportsBinary, callback) {
	  if (!supportsBinary) {
	    return exports.encodeBase64Packet(packet, callback);
	  }

	  var data = packet.data;
	  var contentArray = new Uint8Array(data);
	  var resultBuffer = new Uint8Array(1 + data.byteLength);

	  resultBuffer[0] = packets[packet.type];
	  for (var i = 0; i < contentArray.length; i++) {
	    resultBuffer[i+1] = contentArray[i];
	  }

	  return callback(resultBuffer.buffer);
	}

	function encodeBlobAsArrayBuffer(packet, supportsBinary, callback) {
	  if (!supportsBinary) {
	    return exports.encodeBase64Packet(packet, callback);
	  }

	  var fr = new FileReader();
	  fr.onload = function() {
	    packet.data = fr.result;
	    exports.encodePacket(packet, supportsBinary, true, callback);
	  };
	  return fr.readAsArrayBuffer(packet.data);
	}

	function encodeBlob(packet, supportsBinary, callback) {
	  if (!supportsBinary) {
	    return exports.encodeBase64Packet(packet, callback);
	  }

	  if (dontSendBlobs) {
	    return encodeBlobAsArrayBuffer(packet, supportsBinary, callback);
	  }

	  var length = new Uint8Array(1);
	  length[0] = packets[packet.type];
	  var blob = new Blob([length.buffer, packet.data]);

	  return callback(blob);
	}

	/**
	 * Encodes a packet with binary data in a base64 string
	 *
	 * @param {Object} packet, has `type` and `data`
	 * @return {String} base64 encoded message
	 */

	exports.encodeBase64Packet = function(packet, callback) {
	  var message = 'b' + exports.packets[packet.type];
	  if (Blob && packet.data instanceof global.Blob) {
	    var fr = new FileReader();
	    fr.onload = function() {
	      var b64 = fr.result.split(',')[1];
	      callback(message + b64);
	    };
	    return fr.readAsDataURL(packet.data);
	  }

	  var b64data;
	  try {
	    b64data = String.fromCharCode.apply(null, new Uint8Array(packet.data));
	  } catch (e) {
	    // iPhone Safari doesn't let you apply with typed arrays
	    var typed = new Uint8Array(packet.data);
	    var basic = new Array(typed.length);
	    for (var i = 0; i < typed.length; i++) {
	      basic[i] = typed[i];
	    }
	    b64data = String.fromCharCode.apply(null, basic);
	  }
	  message += global.btoa(b64data);
	  return callback(message);
	};

	/**
	 * Decodes a packet. Changes format to Blob if requested.
	 *
	 * @return {Object} with `type` and `data` (if any)
	 * @api private
	 */

	exports.decodePacket = function (data, binaryType, utf8decode) {
	  // String data
	  if (typeof data == 'string' || data === undefined) {
	    if (data.charAt(0) == 'b') {
	      return exports.decodeBase64Packet(data.substr(1), binaryType);
	    }

	    if (utf8decode) {
	      try {
	        data = utf8.decode(data);
	      } catch (e) {
	        return err;
	      }
	    }
	    var type = data.charAt(0);

	    if (Number(type) != type || !packetslist[type]) {
	      return err;
	    }

	    if (data.length > 1) {
	      return { type: packetslist[type], data: data.substring(1) };
	    } else {
	      return { type: packetslist[type] };
	    }
	  }

	  var asArray = new Uint8Array(data);
	  var type = asArray[0];
	  var rest = sliceBuffer(data, 1);
	  if (Blob && binaryType === 'blob') {
	    rest = new Blob([rest]);
	  }
	  return { type: packetslist[type], data: rest };
	};

	/**
	 * Decodes a packet encoded in a base64 string
	 *
	 * @param {String} base64 encoded message
	 * @return {Object} with `type` and `data` (if any)
	 */

	exports.decodeBase64Packet = function(msg, binaryType) {
	  var type = packetslist[msg.charAt(0)];
	  if (!global.ArrayBuffer) {
	    return { type: type, data: { base64: true, data: msg.substr(1) } };
	  }

	  var data = base64encoder.decode(msg.substr(1));

	  if (binaryType === 'blob' && Blob) {
	    data = new Blob([data]);
	  }

	  return { type: type, data: data };
	};

	/**
	 * Encodes multiple messages (payload).
	 *
	 *     <length>:data
	 *
	 * Example:
	 *
	 *     11:hello world2:hi
	 *
	 * If any contents are binary, they will be encoded as base64 strings. Base64
	 * encoded strings are marked with a b before the length specifier
	 *
	 * @param {Array} packets
	 * @api private
	 */

	exports.encodePayload = function (packets, supportsBinary, callback) {
	  if (typeof supportsBinary == 'function') {
	    callback = supportsBinary;
	    supportsBinary = null;
	  }

	  var isBinary = hasBinary(packets);

	  if (supportsBinary && isBinary) {
	    if (Blob && !dontSendBlobs) {
	      return exports.encodePayloadAsBlob(packets, callback);
	    }

	    return exports.encodePayloadAsArrayBuffer(packets, callback);
	  }

	  if (!packets.length) {
	    return callback('0:');
	  }

	  function setLengthHeader(message) {
	    return message.length + ':' + message;
	  }

	  function encodeOne(packet, doneCallback) {
	    exports.encodePacket(packet, !isBinary ? false : supportsBinary, true, function(message) {
	      doneCallback(null, setLengthHeader(message));
	    });
	  }

	  map(packets, encodeOne, function(err, results) {
	    return callback(results.join(''));
	  });
	};

	/**
	 * Async array map using after
	 */

	function map(ary, each, done) {
	  var result = new Array(ary.length);
	  var next = after(ary.length, done);

	  var eachWithIndex = function(i, el, cb) {
	    each(el, function(error, msg) {
	      result[i] = msg;
	      cb(error, result);
	    });
	  };

	  for (var i = 0; i < ary.length; i++) {
	    eachWithIndex(i, ary[i], next);
	  }
	}

	/*
	 * Decodes data when a payload is maybe expected. Possible binary contents are
	 * decoded from their base64 representation
	 *
	 * @param {String} data, callback method
	 * @api public
	 */

	exports.decodePayload = function (data, binaryType, callback) {
	  if (typeof data != 'string') {
	    return exports.decodePayloadAsBinary(data, binaryType, callback);
	  }

	  if (typeof binaryType === 'function') {
	    callback = binaryType;
	    binaryType = null;
	  }

	  var packet;
	  if (data == '') {
	    // parser error - ignoring payload
	    return callback(err, 0, 1);
	  }

	  var length = ''
	    , n, msg;

	  for (var i = 0, l = data.length; i < l; i++) {
	    var chr = data.charAt(i);

	    if (':' != chr) {
	      length += chr;
	    } else {
	      if ('' == length || (length != (n = Number(length)))) {
	        // parser error - ignoring payload
	        return callback(err, 0, 1);
	      }

	      msg = data.substr(i + 1, n);

	      if (length != msg.length) {
	        // parser error - ignoring payload
	        return callback(err, 0, 1);
	      }

	      if (msg.length) {
	        packet = exports.decodePacket(msg, binaryType, true);

	        if (err.type == packet.type && err.data == packet.data) {
	          // parser error in individual packet - ignoring payload
	          return callback(err, 0, 1);
	        }

	        var ret = callback(packet, i + n, l);
	        if (false === ret) return;
	      }

	      // advance cursor
	      i += n;
	      length = '';
	    }
	  }

	  if (length != '') {
	    // parser error - ignoring payload
	    return callback(err, 0, 1);
	  }

	};

	/**
	 * Encodes multiple messages (payload) as binary.
	 *
	 * <1 = binary, 0 = string><number from 0-9><number from 0-9>[...]<number
	 * 255><data>
	 *
	 * Example:
	 * 1 3 255 1 2 3, if the binary contents are interpreted as 8 bit integers
	 *
	 * @param {Array} packets
	 * @return {ArrayBuffer} encoded payload
	 * @api private
	 */

	exports.encodePayloadAsArrayBuffer = function(packets, callback) {
	  if (!packets.length) {
	    return callback(new ArrayBuffer(0));
	  }

	  function encodeOne(packet, doneCallback) {
	    exports.encodePacket(packet, true, true, function(data) {
	      return doneCallback(null, data);
	    });
	  }

	  map(packets, encodeOne, function(err, encodedPackets) {
	    var totalLength = encodedPackets.reduce(function(acc, p) {
	      var len;
	      if (typeof p === 'string'){
	        len = p.length;
	      } else {
	        len = p.byteLength;
	      }
	      return acc + len.toString().length + len + 2; // string/binary identifier + separator = 2
	    }, 0);

	    var resultArray = new Uint8Array(totalLength);

	    var bufferIndex = 0;
	    encodedPackets.forEach(function(p) {
	      var isString = typeof p === 'string';
	      var ab = p;
	      if (isString) {
	        var view = new Uint8Array(p.length);
	        for (var i = 0; i < p.length; i++) {
	          view[i] = p.charCodeAt(i);
	        }
	        ab = view.buffer;
	      }

	      if (isString) { // not true binary
	        resultArray[bufferIndex++] = 0;
	      } else { // true binary
	        resultArray[bufferIndex++] = 1;
	      }

	      var lenStr = ab.byteLength.toString();
	      for (var i = 0; i < lenStr.length; i++) {
	        resultArray[bufferIndex++] = parseInt(lenStr[i]);
	      }
	      resultArray[bufferIndex++] = 255;

	      var view = new Uint8Array(ab);
	      for (var i = 0; i < view.length; i++) {
	        resultArray[bufferIndex++] = view[i];
	      }
	    });

	    return callback(resultArray.buffer);
	  });
	};

	/**
	 * Encode as Blob
	 */

	exports.encodePayloadAsBlob = function(packets, callback) {
	  function encodeOne(packet, doneCallback) {
	    exports.encodePacket(packet, true, true, function(encoded) {
	      var binaryIdentifier = new Uint8Array(1);
	      binaryIdentifier[0] = 1;
	      if (typeof encoded === 'string') {
	        var view = new Uint8Array(encoded.length);
	        for (var i = 0; i < encoded.length; i++) {
	          view[i] = encoded.charCodeAt(i);
	        }
	        encoded = view.buffer;
	        binaryIdentifier[0] = 0;
	      }

	      var len = (encoded instanceof ArrayBuffer)
	        ? encoded.byteLength
	        : encoded.size;

	      var lenStr = len.toString();
	      var lengthAry = new Uint8Array(lenStr.length + 1);
	      for (var i = 0; i < lenStr.length; i++) {
	        lengthAry[i] = parseInt(lenStr[i]);
	      }
	      lengthAry[lenStr.length] = 255;

	      if (Blob) {
	        var blob = new Blob([binaryIdentifier.buffer, lengthAry.buffer, encoded]);
	        doneCallback(null, blob);
	      }
	    });
	  }

	  map(packets, encodeOne, function(err, results) {
	    return callback(new Blob(results));
	  });
	};

	/*
	 * Decodes data when a payload is maybe expected. Strings are decoded by
	 * interpreting each byte as a key code for entries marked to start with 0. See
	 * description of encodePayloadAsBinary
	 *
	 * @param {ArrayBuffer} data, callback method
	 * @api public
	 */

	exports.decodePayloadAsBinary = function (data, binaryType, callback) {
	  if (typeof binaryType === 'function') {
	    callback = binaryType;
	    binaryType = null;
	  }

	  var bufferTail = data;
	  var buffers = [];

	  var numberTooLong = false;
	  while (bufferTail.byteLength > 0) {
	    var tailArray = new Uint8Array(bufferTail);
	    var isString = tailArray[0] === 0;
	    var msgLength = '';

	    for (var i = 1; ; i++) {
	      if (tailArray[i] == 255) break;

	      if (msgLength.length > 310) {
	        numberTooLong = true;
	        break;
	      }

	      msgLength += tailArray[i];
	    }

	    if(numberTooLong) return callback(err, 0, 1);

	    bufferTail = sliceBuffer(bufferTail, 2 + msgLength.length);
	    msgLength = parseInt(msgLength);

	    var msg = sliceBuffer(bufferTail, 0, msgLength);
	    if (isString) {
	      try {
	        msg = String.fromCharCode.apply(null, new Uint8Array(msg));
	      } catch (e) {
	        // iPhone Safari doesn't let you apply to typed arrays
	        var typed = new Uint8Array(msg);
	        msg = '';
	        for (var i = 0; i < typed.length; i++) {
	          msg += String.fromCharCode(typed[i]);
	        }
	      }
	    }

	    buffers.push(msg);
	    bufferTail = sliceBuffer(bufferTail, msgLength);
	  }

	  var total = buffers.length;
	  buffers.forEach(function(buffer, i) {
	    callback(exports.decodePacket(buffer, binaryType, true), i, total);
	  });
	};

	/* WEBPACK VAR INJECTION */}.call(exports, (function() { return this; }())))

/***/ },
/* 93 */
/***/ function(module, exports) {

	
	/**
	 * Gets the keys for an object.
	 *
	 * @return {Array} keys
	 * @api private
	 */

	module.exports = Object.keys || function keys (obj){
	  var arr = [];
	  var has = Object.prototype.hasOwnProperty;

	  for (var i in obj) {
	    if (has.call(obj, i)) {
	      arr.push(i);
	    }
	  }
	  return arr;
	};


/***/ },
/* 94 */
/***/ function(module, exports, __webpack_require__) {

	/* WEBPACK VAR INJECTION */(function(global) {
	/*
	 * Module requirements.
	 */

	var isArray = __webpack_require__(95);

	/**
	 * Module exports.
	 */

	module.exports = hasBinary;

	/**
	 * Checks for binary data.
	 *
	 * Right now only Buffer and ArrayBuffer are supported..
	 *
	 * @param {Object} anything
	 * @api public
	 */

	function hasBinary(data) {

	  function _hasBinary(obj) {
	    if (!obj) return false;

	    if ( (global.Buffer && global.Buffer.isBuffer(obj)) ||
	         (global.ArrayBuffer && obj instanceof ArrayBuffer) ||
	         (global.Blob && obj instanceof Blob) ||
	         (global.File && obj instanceof File)
	        ) {
	      return true;
	    }

	    if (isArray(obj)) {
	      for (var i = 0; i < obj.length; i++) {
	          if (_hasBinary(obj[i])) {
	              return true;
	          }
	      }
	    } else if (obj && 'object' == typeof obj) {
	      if (obj.toJSON) {
	        obj = obj.toJSON();
	      }

	      for (var key in obj) {
	        if (Object.prototype.hasOwnProperty.call(obj, key) && _hasBinary(obj[key])) {
	          return true;
	        }
	      }
	    }

	    return false;
	  }

	  return _hasBinary(data);
	}

	/* WEBPACK VAR INJECTION */}.call(exports, (function() { return this; }())))

/***/ },
/* 95 */
/***/ function(module, exports) {

	module.exports = Array.isArray || function (arr) {
	  return Object.prototype.toString.call(arr) == '[object Array]';
	};


/***/ },
/* 96 */
/***/ function(module, exports) {

	/**
	 * An abstraction for slicing an arraybuffer even when
	 * ArrayBuffer.prototype.slice is not supported
	 *
	 * @api public
	 */

	module.exports = function(arraybuffer, start, end) {
	  var bytes = arraybuffer.byteLength;
	  start = start || 0;
	  end = end || bytes;

	  if (arraybuffer.slice) { return arraybuffer.slice(start, end); }

	  if (start < 0) { start += bytes; }
	  if (end < 0) { end += bytes; }
	  if (end > bytes) { end = bytes; }

	  if (start >= bytes || start >= end || bytes === 0) {
	    return new ArrayBuffer(0);
	  }

	  var abv = new Uint8Array(arraybuffer);
	  var result = new Uint8Array(end - start);
	  for (var i = start, ii = 0; i < end; i++, ii++) {
	    result[ii] = abv[i];
	  }
	  return result.buffer;
	};


/***/ },
/* 97 */
/***/ function(module, exports) {

	/*
	 * base64-arraybuffer
	 * https://github.com/niklasvh/base64-arraybuffer
	 *
	 * Copyright (c) 2012 Niklas von Hertzen
	 * Licensed under the MIT license.
	 */
	(function(chars){
	  "use strict";

	  exports.encode = function(arraybuffer) {
	    var bytes = new Uint8Array(arraybuffer),
	    i, len = bytes.length, base64 = "";

	    for (i = 0; i < len; i+=3) {
	      base64 += chars[bytes[i] >> 2];
	      base64 += chars[((bytes[i] & 3) << 4) | (bytes[i + 1] >> 4)];
	      base64 += chars[((bytes[i + 1] & 15) << 2) | (bytes[i + 2] >> 6)];
	      base64 += chars[bytes[i + 2] & 63];
	    }

	    if ((len % 3) === 2) {
	      base64 = base64.substring(0, base64.length - 1) + "=";
	    } else if (len % 3 === 1) {
	      base64 = base64.substring(0, base64.length - 2) + "==";
	    }

	    return base64;
	  };

	  exports.decode =  function(base64) {
	    var bufferLength = base64.length * 0.75,
	    len = base64.length, i, p = 0,
	    encoded1, encoded2, encoded3, encoded4;

	    if (base64[base64.length - 1] === "=") {
	      bufferLength--;
	      if (base64[base64.length - 2] === "=") {
	        bufferLength--;
	      }
	    }

	    var arraybuffer = new ArrayBuffer(bufferLength),
	    bytes = new Uint8Array(arraybuffer);

	    for (i = 0; i < len; i+=4) {
	      encoded1 = chars.indexOf(base64[i]);
	      encoded2 = chars.indexOf(base64[i+1]);
	      encoded3 = chars.indexOf(base64[i+2]);
	      encoded4 = chars.indexOf(base64[i+3]);

	      bytes[p++] = (encoded1 << 2) | (encoded2 >> 4);
	      bytes[p++] = ((encoded2 & 15) << 4) | (encoded3 >> 2);
	      bytes[p++] = ((encoded3 & 3) << 6) | (encoded4 & 63);
	    }

	    return arraybuffer;
	  };
	})("ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/");


/***/ },
/* 98 */
/***/ function(module, exports) {

	module.exports = after

	function after(count, callback, err_cb) {
	    var bail = false
	    err_cb = err_cb || noop
	    proxy.count = count

	    return (count === 0) ? callback() : proxy

	    function proxy(err, result) {
	        if (proxy.count <= 0) {
	            throw new Error('after called too many times')
	        }
	        --proxy.count

	        // after first error, rest are passed to err_cb
	        if (err) {
	            bail = true
	            callback(err)
	            // future error callbacks will go to error handler
	            callback = err_cb
	        } else if (proxy.count === 0 && !bail) {
	            callback(null, result)
	        }
	    }
	}

	function noop() {}


/***/ },
/* 99 */
/***/ function(module, exports, __webpack_require__) {

	var __WEBPACK_AMD_DEFINE_RESULT__;/* WEBPACK VAR INJECTION */(function(module, global) {/*! https://mths.be/utf8js v2.0.0 by @mathias */
	;(function(root) {

		// Detect free variables `exports`
		var freeExports = typeof exports == 'object' && exports;

		// Detect free variable `module`
		var freeModule = typeof module == 'object' && module &&
			module.exports == freeExports && module;

		// Detect free variable `global`, from Node.js or Browserified code,
		// and use it as `root`
		var freeGlobal = typeof global == 'object' && global;
		if (freeGlobal.global === freeGlobal || freeGlobal.window === freeGlobal) {
			root = freeGlobal;
		}

		/*--------------------------------------------------------------------------*/

		var stringFromCharCode = String.fromCharCode;

		// Taken from https://mths.be/punycode
		function ucs2decode(string) {
			var output = [];
			var counter = 0;
			var length = string.length;
			var value;
			var extra;
			while (counter < length) {
				value = string.charCodeAt(counter++);
				if (value >= 0xD800 && value <= 0xDBFF && counter < length) {
					// high surrogate, and there is a next character
					extra = string.charCodeAt(counter++);
					if ((extra & 0xFC00) == 0xDC00) { // low surrogate
						output.push(((value & 0x3FF) << 10) + (extra & 0x3FF) + 0x10000);
					} else {
						// unmatched surrogate; only append this code unit, in case the next
						// code unit is the high surrogate of a surrogate pair
						output.push(value);
						counter--;
					}
				} else {
					output.push(value);
				}
			}
			return output;
		}

		// Taken from https://mths.be/punycode
		function ucs2encode(array) {
			var length = array.length;
			var index = -1;
			var value;
			var output = '';
			while (++index < length) {
				value = array[index];
				if (value > 0xFFFF) {
					value -= 0x10000;
					output += stringFromCharCode(value >>> 10 & 0x3FF | 0xD800);
					value = 0xDC00 | value & 0x3FF;
				}
				output += stringFromCharCode(value);
			}
			return output;
		}

		function checkScalarValue(codePoint) {
			if (codePoint >= 0xD800 && codePoint <= 0xDFFF) {
				throw Error(
					'Lone surrogate U+' + codePoint.toString(16).toUpperCase() +
					' is not a scalar value'
				);
			}
		}
		/*--------------------------------------------------------------------------*/

		function createByte(codePoint, shift) {
			return stringFromCharCode(((codePoint >> shift) & 0x3F) | 0x80);
		}

		function encodeCodePoint(codePoint) {
			if ((codePoint & 0xFFFFFF80) == 0) { // 1-byte sequence
				return stringFromCharCode(codePoint);
			}
			var symbol = '';
			if ((codePoint & 0xFFFFF800) == 0) { // 2-byte sequence
				symbol = stringFromCharCode(((codePoint >> 6) & 0x1F) | 0xC0);
			}
			else if ((codePoint & 0xFFFF0000) == 0) { // 3-byte sequence
				checkScalarValue(codePoint);
				symbol = stringFromCharCode(((codePoint >> 12) & 0x0F) | 0xE0);
				symbol += createByte(codePoint, 6);
			}
			else if ((codePoint & 0xFFE00000) == 0) { // 4-byte sequence
				symbol = stringFromCharCode(((codePoint >> 18) & 0x07) | 0xF0);
				symbol += createByte(codePoint, 12);
				symbol += createByte(codePoint, 6);
			}
			symbol += stringFromCharCode((codePoint & 0x3F) | 0x80);
			return symbol;
		}

		function utf8encode(string) {
			var codePoints = ucs2decode(string);
			var length = codePoints.length;
			var index = -1;
			var codePoint;
			var byteString = '';
			while (++index < length) {
				codePoint = codePoints[index];
				byteString += encodeCodePoint(codePoint);
			}
			return byteString;
		}

		/*--------------------------------------------------------------------------*/

		function readContinuationByte() {
			if (byteIndex >= byteCount) {
				throw Error('Invalid byte index');
			}

			var continuationByte = byteArray[byteIndex] & 0xFF;
			byteIndex++;

			if ((continuationByte & 0xC0) == 0x80) {
				return continuationByte & 0x3F;
			}

			// If we end up here, it’s not a continuation byte
			throw Error('Invalid continuation byte');
		}

		function decodeSymbol() {
			var byte1;
			var byte2;
			var byte3;
			var byte4;
			var codePoint;

			if (byteIndex > byteCount) {
				throw Error('Invalid byte index');
			}

			if (byteIndex == byteCount) {
				return false;
			}

			// Read first byte
			byte1 = byteArray[byteIndex] & 0xFF;
			byteIndex++;

			// 1-byte sequence (no continuation bytes)
			if ((byte1 & 0x80) == 0) {
				return byte1;
			}

			// 2-byte sequence
			if ((byte1 & 0xE0) == 0xC0) {
				var byte2 = readContinuationByte();
				codePoint = ((byte1 & 0x1F) << 6) | byte2;
				if (codePoint >= 0x80) {
					return codePoint;
				} else {
					throw Error('Invalid continuation byte');
				}
			}

			// 3-byte sequence (may include unpaired surrogates)
			if ((byte1 & 0xF0) == 0xE0) {
				byte2 = readContinuationByte();
				byte3 = readContinuationByte();
				codePoint = ((byte1 & 0x0F) << 12) | (byte2 << 6) | byte3;
				if (codePoint >= 0x0800) {
					checkScalarValue(codePoint);
					return codePoint;
				} else {
					throw Error('Invalid continuation byte');
				}
			}

			// 4-byte sequence
			if ((byte1 & 0xF8) == 0xF0) {
				byte2 = readContinuationByte();
				byte3 = readContinuationByte();
				byte4 = readContinuationByte();
				codePoint = ((byte1 & 0x0F) << 0x12) | (byte2 << 0x0C) |
					(byte3 << 0x06) | byte4;
				if (codePoint >= 0x010000 && codePoint <= 0x10FFFF) {
					return codePoint;
				}
			}

			throw Error('Invalid UTF-8 detected');
		}

		var byteArray;
		var byteCount;
		var byteIndex;
		function utf8decode(byteString) {
			byteArray = ucs2decode(byteString);
			byteCount = byteArray.length;
			byteIndex = 0;
			var codePoints = [];
			var tmp;
			while ((tmp = decodeSymbol()) !== false) {
				codePoints.push(tmp);
			}
			return ucs2encode(codePoints);
		}

		/*--------------------------------------------------------------------------*/

		var utf8 = {
			'version': '2.0.0',
			'encode': utf8encode,
			'decode': utf8decode
		};

		// Some AMD build optimizers, like r.js, check for specific condition patterns
		// like the following:
		if (
			true
		) {
			!(__WEBPACK_AMD_DEFINE_RESULT__ = function() {
				return utf8;
			}.call(exports, __webpack_require__, exports, module), __WEBPACK_AMD_DEFINE_RESULT__ !== undefined && (module.exports = __WEBPACK_AMD_DEFINE_RESULT__));
		}	else if (freeExports && !freeExports.nodeType) {
			if (freeModule) { // in Node.js or RingoJS v0.8.0+
				freeModule.exports = utf8;
			} else { // in Narwhal or RingoJS v0.7.0-
				var object = {};
				var hasOwnProperty = object.hasOwnProperty;
				for (var key in utf8) {
					hasOwnProperty.call(utf8, key) && (freeExports[key] = utf8[key]);
				}
			}
		} else { // in Rhino or a web browser
			root.utf8 = utf8;
		}

	}(this));

	/* WEBPACK VAR INJECTION */}.call(exports, __webpack_require__(76)(module), (function() { return this; }())))

/***/ },
/* 100 */
/***/ function(module, exports) {

	/* WEBPACK VAR INJECTION */(function(global) {/**
	 * Create a blob builder even when vendor prefixes exist
	 */

	var BlobBuilder = global.BlobBuilder
	  || global.WebKitBlobBuilder
	  || global.MSBlobBuilder
	  || global.MozBlobBuilder;

	/**
	 * Check if Blob constructor is supported
	 */

	var blobSupported = (function() {
	  try {
	    var a = new Blob(['hi']);
	    return a.size === 2;
	  } catch(e) {
	    return false;
	  }
	})();

	/**
	 * Check if Blob constructor supports ArrayBufferViews
	 * Fails in Safari 6, so we need to map to ArrayBuffers there.
	 */

	var blobSupportsArrayBufferView = blobSupported && (function() {
	  try {
	    var b = new Blob([new Uint8Array([1,2])]);
	    return b.size === 2;
	  } catch(e) {
	    return false;
	  }
	})();

	/**
	 * Check if BlobBuilder is supported
	 */

	var blobBuilderSupported = BlobBuilder
	  && BlobBuilder.prototype.append
	  && BlobBuilder.prototype.getBlob;

	/**
	 * Helper function that maps ArrayBufferViews to ArrayBuffers
	 * Used by BlobBuilder constructor and old browsers that didn't
	 * support it in the Blob constructor.
	 */

	function mapArrayBufferViews(ary) {
	  for (var i = 0; i < ary.length; i++) {
	    var chunk = ary[i];
	    if (chunk.buffer instanceof ArrayBuffer) {
	      var buf = chunk.buffer;

	      // if this is a subarray, make a copy so we only
	      // include the subarray region from the underlying buffer
	      if (chunk.byteLength !== buf.byteLength) {
	        var copy = new Uint8Array(chunk.byteLength);
	        copy.set(new Uint8Array(buf, chunk.byteOffset, chunk.byteLength));
	        buf = copy.buffer;
	      }

	      ary[i] = buf;
	    }
	  }
	}

	function BlobBuilderConstructor(ary, options) {
	  options = options || {};

	  var bb = new BlobBuilder();
	  mapArrayBufferViews(ary);

	  for (var i = 0; i < ary.length; i++) {
	    bb.append(ary[i]);
	  }

	  return (options.type) ? bb.getBlob(options.type) : bb.getBlob();
	};

	function BlobConstructor(ary, options) {
	  mapArrayBufferViews(ary);
	  return new Blob(ary, options || {});
	};

	module.exports = (function() {
	  if (blobSupported) {
	    return blobSupportsArrayBufferView ? global.Blob : BlobConstructor;
	  } else if (blobBuilderSupported) {
	    return BlobBuilderConstructor;
	  } else {
	    return undefined;
	  }
	})();

	/* WEBPACK VAR INJECTION */}.call(exports, (function() { return this; }())))

/***/ },
/* 101 */
/***/ function(module, exports) {

	
	/**
	 * Expose `Emitter`.
	 */

	module.exports = Emitter;

	/**
	 * Initialize a new `Emitter`.
	 *
	 * @api public
	 */

	function Emitter(obj) {
	  if (obj) return mixin(obj);
	};

	/**
	 * Mixin the emitter properties.
	 *
	 * @param {Object} obj
	 * @return {Object}
	 * @api private
	 */

	function mixin(obj) {
	  for (var key in Emitter.prototype) {
	    obj[key] = Emitter.prototype[key];
	  }
	  return obj;
	}

	/**
	 * Listen on the given `event` with `fn`.
	 *
	 * @param {String} event
	 * @param {Function} fn
	 * @return {Emitter}
	 * @api public
	 */

	Emitter.prototype.on =
	Emitter.prototype.addEventListener = function(event, fn){
	  this._callbacks = this._callbacks || {};
	  (this._callbacks[event] = this._callbacks[event] || [])
	    .push(fn);
	  return this;
	};

	/**
	 * Adds an `event` listener that will be invoked a single
	 * time then automatically removed.
	 *
	 * @param {String} event
	 * @param {Function} fn
	 * @return {Emitter}
	 * @api public
	 */

	Emitter.prototype.once = function(event, fn){
	  var self = this;
	  this._callbacks = this._callbacks || {};

	  function on() {
	    self.off(event, on);
	    fn.apply(this, arguments);
	  }

	  on.fn = fn;
	  this.on(event, on);
	  return this;
	};

	/**
	 * Remove the given callback for `event` or all
	 * registered callbacks.
	 *
	 * @param {String} event
	 * @param {Function} fn
	 * @return {Emitter}
	 * @api public
	 */

	Emitter.prototype.off =
	Emitter.prototype.removeListener =
	Emitter.prototype.removeAllListeners =
	Emitter.prototype.removeEventListener = function(event, fn){
	  this._callbacks = this._callbacks || {};

	  // all
	  if (0 == arguments.length) {
	    this._callbacks = {};
	    return this;
	  }

	  // specific event
	  var callbacks = this._callbacks[event];
	  if (!callbacks) return this;

	  // remove all handlers
	  if (1 == arguments.length) {
	    delete this._callbacks[event];
	    return this;
	  }

	  // remove specific handler
	  var cb;
	  for (var i = 0; i < callbacks.length; i++) {
	    cb = callbacks[i];
	    if (cb === fn || cb.fn === fn) {
	      callbacks.splice(i, 1);
	      break;
	    }
	  }
	  return this;
	};

	/**
	 * Emit `event` with the given args.
	 *
	 * @param {String} event
	 * @param {Mixed} ...
	 * @return {Emitter}
	 */

	Emitter.prototype.emit = function(event){
	  this._callbacks = this._callbacks || {};
	  var args = [].slice.call(arguments, 1)
	    , callbacks = this._callbacks[event];

	  if (callbacks) {
	    callbacks = callbacks.slice(0);
	    for (var i = 0, len = callbacks.length; i < len; ++i) {
	      callbacks[i].apply(this, args);
	    }
	  }

	  return this;
	};

	/**
	 * Return array of callbacks for `event`.
	 *
	 * @param {String} event
	 * @return {Array}
	 * @api public
	 */

	Emitter.prototype.listeners = function(event){
	  this._callbacks = this._callbacks || {};
	  return this._callbacks[event] || [];
	};

	/**
	 * Check if this emitter has `event` handlers.
	 *
	 * @param {String} event
	 * @return {Boolean}
	 * @api public
	 */

	Emitter.prototype.hasListeners = function(event){
	  return !! this.listeners(event).length;
	};


/***/ },
/* 102 */
/***/ function(module, exports) {

	/**
	 * Compiles a querystring
	 * Returns string representation of the object
	 *
	 * @param {Object}
	 * @api private
	 */

	exports.encode = function (obj) {
	  var str = '';

	  for (var i in obj) {
	    if (obj.hasOwnProperty(i)) {
	      if (str.length) str += '&';
	      str += encodeURIComponent(i) + '=' + encodeURIComponent(obj[i]);
	    }
	  }

	  return str;
	};

	/**
	 * Parses a simple querystring into an object
	 *
	 * @param {String} qs
	 * @api private
	 */

	exports.decode = function(qs){
	  var qry = {};
	  var pairs = qs.split('&');
	  for (var i = 0, l = pairs.length; i < l; i++) {
	    var pair = pairs[i].split('=');
	    qry[decodeURIComponent(pair[0])] = decodeURIComponent(pair[1]);
	  }
	  return qry;
	};


/***/ },
/* 103 */
/***/ function(module, exports) {

	
	module.exports = function(a, b){
	  var fn = function(){};
	  fn.prototype = b.prototype;
	  a.prototype = new fn;
	  a.prototype.constructor = a;
	};

/***/ },
/* 104 */
/***/ function(module, exports) {

	'use strict';

	var alphabet = '0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz-_'.split('')
	  , length = 64
	  , map = {}
	  , seed = 0
	  , i = 0
	  , prev;

	/**
	 * Return a string representing the specified number.
	 *
	 * @param {Number} num The number to convert.
	 * @returns {String} The string representation of the number.
	 * @api public
	 */
	function encode(num) {
	  var encoded = '';

	  do {
	    encoded = alphabet[num % length] + encoded;
	    num = Math.floor(num / length);
	  } while (num > 0);

	  return encoded;
	}

	/**
	 * Return the integer value specified by the given string.
	 *
	 * @param {String} str The string to convert.
	 * @returns {Number} The integer value represented by the string.
	 * @api public
	 */
	function decode(str) {
	  var decoded = 0;

	  for (i = 0; i < str.length; i++) {
	    decoded = decoded * length + map[str.charAt(i)];
	  }

	  return decoded;
	}

	/**
	 * Yeast: A tiny growing id generator.
	 *
	 * @returns {String} A unique id.
	 * @api public
	 */
	function yeast() {
	  var now = encode(+new Date());

	  if (now !== prev) return seed = 0, prev = now;
	  return now +'.'+ encode(seed++);
	}

	//
	// Map each character to its index.
	//
	for (; i < length; i++) map[alphabet[i]] = i;

	//
	// Expose the `yeast`, `encode` and `decode` functions.
	//
	yeast.encode = encode;
	yeast.decode = decode;
	module.exports = yeast;


/***/ },
/* 105 */
/***/ function(module, exports, __webpack_require__) {

	/* WEBPACK VAR INJECTION */(function(global) {
	/**
	 * Module requirements.
	 */

	var Polling = __webpack_require__(90);
	var inherit = __webpack_require__(103);

	/**
	 * Module exports.
	 */

	module.exports = JSONPPolling;

	/**
	 * Cached regular expressions.
	 */

	var rNewline = /\n/g;
	var rEscapedNewline = /\\n/g;

	/**
	 * Global JSONP callbacks.
	 */

	var callbacks;

	/**
	 * Callbacks count.
	 */

	var index = 0;

	/**
	 * Noop.
	 */

	function empty () { }

	/**
	 * JSONP Polling constructor.
	 *
	 * @param {Object} opts.
	 * @api public
	 */

	function JSONPPolling (opts) {
	  Polling.call(this, opts);

	  this.query = this.query || {};

	  // define global callbacks array if not present
	  // we do this here (lazily) to avoid unneeded global pollution
	  if (!callbacks) {
	    // we need to consider multiple engines in the same page
	    if (!global.___eio) global.___eio = [];
	    callbacks = global.___eio;
	  }

	  // callback identifier
	  this.index = callbacks.length;

	  // add callback to jsonp global
	  var self = this;
	  callbacks.push(function (msg) {
	    self.onData(msg);
	  });

	  // append to query string
	  this.query.j = this.index;

	  // prevent spurious errors from being emitted when the window is unloaded
	  if (global.document && global.addEventListener) {
	    global.addEventListener('beforeunload', function () {
	      if (self.script) self.script.onerror = empty;
	    }, false);
	  }
	}

	/**
	 * Inherits from Polling.
	 */

	inherit(JSONPPolling, Polling);

	/*
	 * JSONP only supports binary as base64 encoded strings
	 */

	JSONPPolling.prototype.supportsBinary = false;

	/**
	 * Closes the socket.
	 *
	 * @api private
	 */

	JSONPPolling.prototype.doClose = function () {
	  if (this.script) {
	    this.script.parentNode.removeChild(this.script);
	    this.script = null;
	  }

	  if (this.form) {
	    this.form.parentNode.removeChild(this.form);
	    this.form = null;
	    this.iframe = null;
	  }

	  Polling.prototype.doClose.call(this);
	};

	/**
	 * Starts a poll cycle.
	 *
	 * @api private
	 */

	JSONPPolling.prototype.doPoll = function () {
	  var self = this;
	  var script = document.createElement('script');

	  if (this.script) {
	    this.script.parentNode.removeChild(this.script);
	    this.script = null;
	  }

	  script.async = true;
	  script.src = this.uri();
	  script.onerror = function(e){
	    self.onError('jsonp poll error',e);
	  };

	  var insertAt = document.getElementsByTagName('script')[0];
	  if (insertAt) {
	    insertAt.parentNode.insertBefore(script, insertAt);
	  }
	  else {
	    (document.head || document.body).appendChild(script);
	  }
	  this.script = script;

	  var isUAgecko = 'undefined' != typeof navigator && /gecko/i.test(navigator.userAgent);
	  
	  if (isUAgecko) {
	    setTimeout(function () {
	      var iframe = document.createElement('iframe');
	      document.body.appendChild(iframe);
	      document.body.removeChild(iframe);
	    }, 100);
	  }
	};

	/**
	 * Writes with a hidden iframe.
	 *
	 * @param {String} data to send
	 * @param {Function} called upon flush.
	 * @api private
	 */

	JSONPPolling.prototype.doWrite = function (data, fn) {
	  var self = this;

	  if (!this.form) {
	    var form = document.createElement('form');
	    var area = document.createElement('textarea');
	    var id = this.iframeId = 'eio_iframe_' + this.index;
	    var iframe;

	    form.className = 'socketio';
	    form.style.position = 'absolute';
	    form.style.top = '-1000px';
	    form.style.left = '-1000px';
	    form.target = id;
	    form.method = 'POST';
	    form.setAttribute('accept-charset', 'utf-8');
	    area.name = 'd';
	    form.appendChild(area);
	    document.body.appendChild(form);

	    this.form = form;
	    this.area = area;
	  }

	  this.form.action = this.uri();

	  function complete () {
	    initIframe();
	    fn();
	  }

	  function initIframe () {
	    if (self.iframe) {
	      try {
	        self.form.removeChild(self.iframe);
	      } catch (e) {
	        self.onError('jsonp polling iframe removal error', e);
	      }
	    }

	    try {
	      // ie6 dynamic iframes with target="" support (thanks Chris Lambacher)
	      var html = '<iframe src="javascript:0" name="'+ self.iframeId +'">';
	      iframe = document.createElement(html);
	    } catch (e) {
	      iframe = document.createElement('iframe');
	      iframe.name = self.iframeId;
	      iframe.src = 'javascript:0';
	    }

	    iframe.id = self.iframeId;

	    self.form.appendChild(iframe);
	    self.iframe = iframe;
	  }

	  initIframe();

	  // escape \n to prevent it from being converted into \r\n by some UAs
	  // double escaping is required for escaped new lines because unescaping of new lines can be done safely on server-side
	  data = data.replace(rEscapedNewline, '\\\n');
	  this.area.value = data.replace(rNewline, '\\n');

	  try {
	    this.form.submit();
	  } catch(e) {}

	  if (this.iframe.attachEvent) {
	    this.iframe.onreadystatechange = function(){
	      if (self.iframe.readyState == 'complete') {
	        complete();
	      }
	    };
	  } else {
	    this.iframe.onload = complete;
	  }
	};

	/* WEBPACK VAR INJECTION */}.call(exports, (function() { return this; }())))

/***/ },
/* 106 */
/***/ function(module, exports, __webpack_require__) {

	/* WEBPACK VAR INJECTION */(function(global) {/**
	 * Module dependencies.
	 */

	var Transport = __webpack_require__(91);
	var parser = __webpack_require__(92);
	var parseqs = __webpack_require__(102);
	var inherit = __webpack_require__(103);
	var yeast = __webpack_require__(104);
	var debug = __webpack_require__(71)('engine.io-client:websocket');
	var BrowserWebSocket = global.WebSocket || global.MozWebSocket;

	/**
	 * Get either the `WebSocket` or `MozWebSocket` globals
	 * in the browser or try to resolve WebSocket-compatible
	 * interface exposed by `ws` for Node-like environment.
	 */

	var WebSocket = BrowserWebSocket;
	if (!WebSocket && typeof window === 'undefined') {
	  try {
	    WebSocket = __webpack_require__(107);
	  } catch (e) { }
	}

	/**
	 * Module exports.
	 */

	module.exports = WS;

	/**
	 * WebSocket transport constructor.
	 *
	 * @api {Object} connection options
	 * @api public
	 */

	function WS(opts){
	  var forceBase64 = (opts && opts.forceBase64);
	  if (forceBase64) {
	    this.supportsBinary = false;
	  }
	  this.perMessageDeflate = opts.perMessageDeflate;
	  Transport.call(this, opts);
	}

	/**
	 * Inherits from Transport.
	 */

	inherit(WS, Transport);

	/**
	 * Transport name.
	 *
	 * @api public
	 */

	WS.prototype.name = 'websocket';

	/*
	 * WebSockets support binary
	 */

	WS.prototype.supportsBinary = true;

	/**
	 * Opens socket.
	 *
	 * @api private
	 */

	WS.prototype.doOpen = function(){
	  if (!this.check()) {
	    // let probe timeout
	    return;
	  }

	  var self = this;
	  var uri = this.uri();
	  var protocols = void(0);
	  var opts = {
	    agent: this.agent,
	    perMessageDeflate: this.perMessageDeflate
	  };

	  // SSL options for Node.js client
	  opts.pfx = this.pfx;
	  opts.key = this.key;
	  opts.passphrase = this.passphrase;
	  opts.cert = this.cert;
	  opts.ca = this.ca;
	  opts.ciphers = this.ciphers;
	  opts.rejectUnauthorized = this.rejectUnauthorized;
	  if (this.extraHeaders) {
	    opts.headers = this.extraHeaders;
	  }

	  this.ws = BrowserWebSocket ? new WebSocket(uri) : new WebSocket(uri, protocols, opts);

	  if (this.ws.binaryType === undefined) {
	    this.supportsBinary = false;
	  }

	  if (this.ws.supports && this.ws.supports.binary) {
	    this.supportsBinary = true;
	    this.ws.binaryType = 'buffer';
	  } else {
	    this.ws.binaryType = 'arraybuffer';
	  }

	  this.addEventListeners();
	};

	/**
	 * Adds event listeners to the socket
	 *
	 * @api private
	 */

	WS.prototype.addEventListeners = function(){
	  var self = this;

	  this.ws.onopen = function(){
	    self.onOpen();
	  };
	  this.ws.onclose = function(){
	    self.onClose();
	  };
	  this.ws.onmessage = function(ev){
	    self.onData(ev.data);
	  };
	  this.ws.onerror = function(e){
	    self.onError('websocket error', e);
	  };
	};

	/**
	 * Override `onData` to use a timer on iOS.
	 * See: https://gist.github.com/mloughran/2052006
	 *
	 * @api private
	 */

	if ('undefined' != typeof navigator
	  && /iPad|iPhone|iPod/i.test(navigator.userAgent)) {
	  WS.prototype.onData = function(data){
	    var self = this;
	    setTimeout(function(){
	      Transport.prototype.onData.call(self, data);
	    }, 0);
	  };
	}

	/**
	 * Writes data to socket.
	 *
	 * @param {Array} array of packets.
	 * @api private
	 */

	WS.prototype.write = function(packets){
	  var self = this;
	  this.writable = false;

	  // encodePacket efficient as it uses WS framing
	  // no need for encodePayload
	  var total = packets.length;
	  for (var i = 0, l = total; i < l; i++) {
	    (function(packet) {
	      parser.encodePacket(packet, self.supportsBinary, function(data) {
	        if (!BrowserWebSocket) {
	          // always create a new object (GH-437)
	          var opts = {};
	          if (packet.options) {
	            opts.compress = packet.options.compress;
	          }

	          if (self.perMessageDeflate) {
	            var len = 'string' == typeof data ? global.Buffer.byteLength(data) : data.length;
	            if (len < self.perMessageDeflate.threshold) {
	              opts.compress = false;
	            }
	          }
	        }

	        //Sometimes the websocket has already been closed but the browser didn't
	        //have a chance of informing us about it yet, in that case send will
	        //throw an error
	        try {
	          if (BrowserWebSocket) {
	            // TypeError is thrown when passing the second argument on Safari
	            self.ws.send(data);
	          } else {
	            self.ws.send(data, opts);
	          }
	        } catch (e){
	          debug('websocket closed before onclose event');
	        }

	        --total || done();
	      });
	    })(packets[i]);
	  }

	  function done(){
	    self.emit('flush');

	    // fake drain
	    // defer to next tick to allow Socket to clear writeBuffer
	    setTimeout(function(){
	      self.writable = true;
	      self.emit('drain');
	    }, 0);
	  }
	};

	/**
	 * Called upon close
	 *
	 * @api private
	 */

	WS.prototype.onClose = function(){
	  Transport.prototype.onClose.call(this);
	};

	/**
	 * Closes socket.
	 *
	 * @api private
	 */

	WS.prototype.doClose = function(){
	  if (typeof this.ws !== 'undefined') {
	    this.ws.close();
	  }
	};

	/**
	 * Generates uri for connection.
	 *
	 * @api private
	 */

	WS.prototype.uri = function(){
	  var query = this.query || {};
	  var schema = this.secure ? 'wss' : 'ws';
	  var port = '';

	  // avoid port if default for schema
	  if (this.port && (('wss' == schema && this.port != 443)
	    || ('ws' == schema && this.port != 80))) {
	    port = ':' + this.port;
	  }

	  // append timestamp to URI
	  if (this.timestampRequests) {
	    query[this.timestampParam] = yeast();
	  }

	  // communicate binary support capabilities
	  if (!this.supportsBinary) {
	    query.b64 = 1;
	  }

	  query = parseqs.encode(query);

	  // prepend ? to query
	  if (query.length) {
	    query = '?' + query;
	  }

	  var ipv6 = this.hostname.indexOf(':') !== -1;
	  return schema + '://' + (ipv6 ? '[' + this.hostname + ']' : this.hostname) + port + this.path + query;
	};

	/**
	 * Feature detection for WebSocket.
	 *
	 * @return {Boolean} whether this transport is available.
	 * @api public
	 */

	WS.prototype.check = function(){
	  return !!WebSocket && !('__initialize' in WebSocket && this.name === WS.prototype.name);
	};

	/* WEBPACK VAR INJECTION */}.call(exports, (function() { return this; }())))

/***/ },
/* 107 */
/***/ function(module, exports) {

	/* (ignored) */

/***/ },
/* 108 */
/***/ function(module, exports) {

	
	var indexOf = [].indexOf;

	module.exports = function(arr, obj){
	  if (indexOf) return arr.indexOf(obj);
	  for (var i = 0; i < arr.length; ++i) {
	    if (arr[i] === obj) return i;
	  }
	  return -1;
	};

/***/ },
/* 109 */
/***/ function(module, exports) {

	/* WEBPACK VAR INJECTION */(function(global) {/**
	 * JSON parse.
	 *
	 * @see Based on jQuery#parseJSON (MIT) and JSON2
	 * @api private
	 */

	var rvalidchars = /^[\],:{}\s]*$/;
	var rvalidescape = /\\(?:["\\\/bfnrt]|u[0-9a-fA-F]{4})/g;
	var rvalidtokens = /"[^"\\\n\r]*"|true|false|null|-?\d+(?:\.\d*)?(?:[eE][+\-]?\d+)?/g;
	var rvalidbraces = /(?:^|:|,)(?:\s*\[)+/g;
	var rtrimLeft = /^\s+/;
	var rtrimRight = /\s+$/;

	module.exports = function parsejson(data) {
	  if ('string' != typeof data || !data) {
	    return null;
	  }

	  data = data.replace(rtrimLeft, '').replace(rtrimRight, '');

	  // Attempt to parse using the native JSON parser first
	  if (global.JSON && JSON.parse) {
	    return JSON.parse(data);
	  }

	  if (rvalidchars.test(data.replace(rvalidescape, '@')
	      .replace(rvalidtokens, ']')
	      .replace(rvalidbraces, ''))) {
	    return (new Function('return ' + data))();
	  }
	};
	/* WEBPACK VAR INJECTION */}.call(exports, (function() { return this; }())))

/***/ },
/* 110 */
/***/ function(module, exports, __webpack_require__) {

	
	/**
	 * Module dependencies.
	 */

	var parser = __webpack_require__(74);
	var Emitter = __webpack_require__(111);
	var toArray = __webpack_require__(112);
	var on = __webpack_require__(113);
	var bind = __webpack_require__(114);
	var debug = __webpack_require__(71)('socket.io-client:socket');
	var hasBin = __webpack_require__(115);

	/**
	 * Module exports.
	 */

	module.exports = exports = Socket;

	/**
	 * Internal events (blacklisted).
	 * These events can't be emitted by the user.
	 *
	 * @api private
	 */

	var events = {
	  connect: 1,
	  connect_error: 1,
	  connect_timeout: 1,
	  connecting: 1,
	  disconnect: 1,
	  error: 1,
	  reconnect: 1,
	  reconnect_attempt: 1,
	  reconnect_failed: 1,
	  reconnect_error: 1,
	  reconnecting: 1,
	  ping: 1,
	  pong: 1
	};

	/**
	 * Shortcut to `Emitter#emit`.
	 */

	var emit = Emitter.prototype.emit;

	/**
	 * `Socket` constructor.
	 *
	 * @api public
	 */

	function Socket(io, nsp){
	  this.io = io;
	  this.nsp = nsp;
	  this.json = this; // compat
	  this.ids = 0;
	  this.acks = {};
	  this.receiveBuffer = [];
	  this.sendBuffer = [];
	  this.connected = false;
	  this.disconnected = true;
	  if (this.io.autoConnect) this.open();
	}

	/**
	 * Mix in `Emitter`.
	 */

	Emitter(Socket.prototype);

	/**
	 * Subscribe to open, close and packet events
	 *
	 * @api private
	 */

	Socket.prototype.subEvents = function() {
	  if (this.subs) return;

	  var io = this.io;
	  this.subs = [
	    on(io, 'open', bind(this, 'onopen')),
	    on(io, 'packet', bind(this, 'onpacket')),
	    on(io, 'close', bind(this, 'onclose'))
	  ];
	};

	/**
	 * "Opens" the socket.
	 *
	 * @api public
	 */

	Socket.prototype.open =
	Socket.prototype.connect = function(){
	  if (this.connected) return this;

	  this.subEvents();
	  this.io.open(); // ensure open
	  if ('open' == this.io.readyState) this.onopen();
	  this.emit('connecting');
	  return this;
	};

	/**
	 * Sends a `message` event.
	 *
	 * @return {Socket} self
	 * @api public
	 */

	Socket.prototype.send = function(){
	  var args = toArray(arguments);
	  args.unshift('message');
	  this.emit.apply(this, args);
	  return this;
	};

	/**
	 * Override `emit`.
	 * If the event is in `events`, it's emitted normally.
	 *
	 * @param {String} event name
	 * @return {Socket} self
	 * @api public
	 */

	Socket.prototype.emit = function(ev){
	  if (events.hasOwnProperty(ev)) {
	    emit.apply(this, arguments);
	    return this;
	  }

	  var args = toArray(arguments);
	  var parserType = parser.EVENT; // default
	  if (hasBin(args)) { parserType = parser.BINARY_EVENT; } // binary
	  var packet = { type: parserType, data: args };

	  packet.options = {};
	  packet.options.compress = !this.flags || false !== this.flags.compress;

	  // event ack callback
	  if ('function' == typeof args[args.length - 1]) {
	    debug('emitting packet with ack id %d', this.ids);
	    this.acks[this.ids] = args.pop();
	    packet.id = this.ids++;
	  }

	  if (this.connected) {
	    this.packet(packet);
	  } else {
	    this.sendBuffer.push(packet);
	  }

	  delete this.flags;

	  return this;
	};

	/**
	 * Sends a packet.
	 *
	 * @param {Object} packet
	 * @api private
	 */

	Socket.prototype.packet = function(packet){
	  packet.nsp = this.nsp;
	  this.io.packet(packet);
	};

	/**
	 * Called upon engine `open`.
	 *
	 * @api private
	 */

	Socket.prototype.onopen = function(){
	  debug('transport is open - connecting');

	  // write connect packet if necessary
	  if ('/' != this.nsp) {
	    this.packet({ type: parser.CONNECT });
	  }
	};

	/**
	 * Called upon engine `close`.
	 *
	 * @param {String} reason
	 * @api private
	 */

	Socket.prototype.onclose = function(reason){
	  debug('close (%s)', reason);
	  this.connected = false;
	  this.disconnected = true;
	  delete this.id;
	  this.emit('disconnect', reason);
	};

	/**
	 * Called with socket packet.
	 *
	 * @param {Object} packet
	 * @api private
	 */

	Socket.prototype.onpacket = function(packet){
	  if (packet.nsp != this.nsp) return;

	  switch (packet.type) {
	    case parser.CONNECT:
	      this.onconnect();
	      break;

	    case parser.EVENT:
	      this.onevent(packet);
	      break;

	    case parser.BINARY_EVENT:
	      this.onevent(packet);
	      break;

	    case parser.ACK:
	      this.onack(packet);
	      break;

	    case parser.BINARY_ACK:
	      this.onack(packet);
	      break;

	    case parser.DISCONNECT:
	      this.ondisconnect();
	      break;

	    case parser.ERROR:
	      this.emit('error', packet.data);
	      break;
	  }
	};

	/**
	 * Called upon a server event.
	 *
	 * @param {Object} packet
	 * @api private
	 */

	Socket.prototype.onevent = function(packet){
	  var args = packet.data || [];
	  debug('emitting event %j', args);

	  if (null != packet.id) {
	    debug('attaching ack callback to event');
	    args.push(this.ack(packet.id));
	  }

	  if (this.connected) {
	    emit.apply(this, args);
	  } else {
	    this.receiveBuffer.push(args);
	  }
	};

	/**
	 * Produces an ack callback to emit with an event.
	 *
	 * @api private
	 */

	Socket.prototype.ack = function(id){
	  var self = this;
	  var sent = false;
	  return function(){
	    // prevent double callbacks
	    if (sent) return;
	    sent = true;
	    var args = toArray(arguments);
	    debug('sending ack %j', args);

	    var type = hasBin(args) ? parser.BINARY_ACK : parser.ACK;
	    self.packet({
	      type: type,
	      id: id,
	      data: args
	    });
	  };
	};

	/**
	 * Called upon a server acknowlegement.
	 *
	 * @param {Object} packet
	 * @api private
	 */

	Socket.prototype.onack = function(packet){
	  var ack = this.acks[packet.id];
	  if ('function' == typeof ack) {
	    debug('calling ack %s with %j', packet.id, packet.data);
	    ack.apply(this, packet.data);
	    delete this.acks[packet.id];
	  } else {
	    debug('bad ack %s', packet.id);
	  }
	};

	/**
	 * Called upon server connect.
	 *
	 * @api private
	 */

	Socket.prototype.onconnect = function(){
	  this.connected = true;
	  this.disconnected = false;
	  this.emit('connect');
	  this.emitBuffered();
	};

	/**
	 * Emit buffered events (received and emitted).
	 *
	 * @api private
	 */

	Socket.prototype.emitBuffered = function(){
	  var i;
	  for (i = 0; i < this.receiveBuffer.length; i++) {
	    emit.apply(this, this.receiveBuffer[i]);
	  }
	  this.receiveBuffer = [];

	  for (i = 0; i < this.sendBuffer.length; i++) {
	    this.packet(this.sendBuffer[i]);
	  }
	  this.sendBuffer = [];
	};

	/**
	 * Called upon server disconnect.
	 *
	 * @api private
	 */

	Socket.prototype.ondisconnect = function(){
	  debug('server disconnect (%s)', this.nsp);
	  this.destroy();
	  this.onclose('io server disconnect');
	};

	/**
	 * Called upon forced client/server side disconnections,
	 * this method ensures the manager stops tracking us and
	 * that reconnections don't get triggered for this.
	 *
	 * @api private.
	 */

	Socket.prototype.destroy = function(){
	  if (this.subs) {
	    // clean subscriptions to avoid reconnections
	    for (var i = 0; i < this.subs.length; i++) {
	      this.subs[i].destroy();
	    }
	    this.subs = null;
	  }

	  this.io.destroy(this);
	};

	/**
	 * Disconnects the socket manually.
	 *
	 * @return {Socket} self
	 * @api public
	 */

	Socket.prototype.close =
	Socket.prototype.disconnect = function(){
	  if (this.connected) {
	    debug('performing disconnect (%s)', this.nsp);
	    this.packet({ type: parser.DISCONNECT });
	  }

	  // remove socket from pool
	  this.destroy();

	  if (this.connected) {
	    // fire events
	    this.onclose('io client disconnect');
	  }
	  return this;
	};

	/**
	 * Sets the compress flag.
	 *
	 * @param {Boolean} if `true`, compresses the sending data
	 * @return {Socket} self
	 * @api public
	 */

	Socket.prototype.compress = function(compress){
	  this.flags = this.flags || {};
	  this.flags.compress = compress;
	  return this;
	};


/***/ },
/* 111 */
/***/ function(module, exports) {

	
	/**
	 * Expose `Emitter`.
	 */

	module.exports = Emitter;

	/**
	 * Initialize a new `Emitter`.
	 *
	 * @api public
	 */

	function Emitter(obj) {
	  if (obj) return mixin(obj);
	};

	/**
	 * Mixin the emitter properties.
	 *
	 * @param {Object} obj
	 * @return {Object}
	 * @api private
	 */

	function mixin(obj) {
	  for (var key in Emitter.prototype) {
	    obj[key] = Emitter.prototype[key];
	  }
	  return obj;
	}

	/**
	 * Listen on the given `event` with `fn`.
	 *
	 * @param {String} event
	 * @param {Function} fn
	 * @return {Emitter}
	 * @api public
	 */

	Emitter.prototype.on =
	Emitter.prototype.addEventListener = function(event, fn){
	  this._callbacks = this._callbacks || {};
	  (this._callbacks['$' + event] = this._callbacks['$' + event] || [])
	    .push(fn);
	  return this;
	};

	/**
	 * Adds an `event` listener that will be invoked a single
	 * time then automatically removed.
	 *
	 * @param {String} event
	 * @param {Function} fn
	 * @return {Emitter}
	 * @api public
	 */

	Emitter.prototype.once = function(event, fn){
	  function on() {
	    this.off(event, on);
	    fn.apply(this, arguments);
	  }

	  on.fn = fn;
	  this.on(event, on);
	  return this;
	};

	/**
	 * Remove the given callback for `event` or all
	 * registered callbacks.
	 *
	 * @param {String} event
	 * @param {Function} fn
	 * @return {Emitter}
	 * @api public
	 */

	Emitter.prototype.off =
	Emitter.prototype.removeListener =
	Emitter.prototype.removeAllListeners =
	Emitter.prototype.removeEventListener = function(event, fn){
	  this._callbacks = this._callbacks || {};

	  // all
	  if (0 == arguments.length) {
	    this._callbacks = {};
	    return this;
	  }

	  // specific event
	  var callbacks = this._callbacks['$' + event];
	  if (!callbacks) return this;

	  // remove all handlers
	  if (1 == arguments.length) {
	    delete this._callbacks['$' + event];
	    return this;
	  }

	  // remove specific handler
	  var cb;
	  for (var i = 0; i < callbacks.length; i++) {
	    cb = callbacks[i];
	    if (cb === fn || cb.fn === fn) {
	      callbacks.splice(i, 1);
	      break;
	    }
	  }
	  return this;
	};

	/**
	 * Emit `event` with the given args.
	 *
	 * @param {String} event
	 * @param {Mixed} ...
	 * @return {Emitter}
	 */

	Emitter.prototype.emit = function(event){
	  this._callbacks = this._callbacks || {};
	  var args = [].slice.call(arguments, 1)
	    , callbacks = this._callbacks['$' + event];

	  if (callbacks) {
	    callbacks = callbacks.slice(0);
	    for (var i = 0, len = callbacks.length; i < len; ++i) {
	      callbacks[i].apply(this, args);
	    }
	  }

	  return this;
	};

	/**
	 * Return array of callbacks for `event`.
	 *
	 * @param {String} event
	 * @return {Array}
	 * @api public
	 */

	Emitter.prototype.listeners = function(event){
	  this._callbacks = this._callbacks || {};
	  return this._callbacks['$' + event] || [];
	};

	/**
	 * Check if this emitter has `event` handlers.
	 *
	 * @param {String} event
	 * @return {Boolean}
	 * @api public
	 */

	Emitter.prototype.hasListeners = function(event){
	  return !! this.listeners(event).length;
	};


/***/ },
/* 112 */
/***/ function(module, exports) {

	module.exports = toArray

	function toArray(list, index) {
	    var array = []

	    index = index || 0

	    for (var i = index || 0; i < list.length; i++) {
	        array[i - index] = list[i]
	    }

	    return array
	}


/***/ },
/* 113 */
/***/ function(module, exports) {

	
	/**
	 * Module exports.
	 */

	module.exports = on;

	/**
	 * Helper for subscriptions.
	 *
	 * @param {Object|EventEmitter} obj with `Emitter` mixin or `EventEmitter`
	 * @param {String} event name
	 * @param {Function} callback
	 * @api public
	 */

	function on(obj, ev, fn) {
	  obj.on(ev, fn);
	  return {
	    destroy: function(){
	      obj.removeListener(ev, fn);
	    }
	  };
	}


/***/ },
/* 114 */
/***/ function(module, exports) {

	/**
	 * Slice reference.
	 */

	var slice = [].slice;

	/**
	 * Bind `obj` to `fn`.
	 *
	 * @param {Object} obj
	 * @param {Function|String} fn or string
	 * @return {Function}
	 * @api public
	 */

	module.exports = function(obj, fn){
	  if ('string' == typeof fn) fn = obj[fn];
	  if ('function' != typeof fn) throw new Error('bind() requires a function');
	  var args = slice.call(arguments, 2);
	  return function(){
	    return fn.apply(obj, args.concat(slice.call(arguments)));
	  }
	};


/***/ },
/* 115 */
/***/ function(module, exports, __webpack_require__) {

	/* WEBPACK VAR INJECTION */(function(global) {
	/*
	 * Module requirements.
	 */

	var isArray = __webpack_require__(116);

	/**
	 * Module exports.
	 */

	module.exports = hasBinary;

	/**
	 * Checks for binary data.
	 *
	 * Right now only Buffer and ArrayBuffer are supported..
	 *
	 * @param {Object} anything
	 * @api public
	 */

	function hasBinary(data) {

	  function _hasBinary(obj) {
	    if (!obj) return false;

	    if ( (global.Buffer && global.Buffer.isBuffer && global.Buffer.isBuffer(obj)) ||
	         (global.ArrayBuffer && obj instanceof ArrayBuffer) ||
	         (global.Blob && obj instanceof Blob) ||
	         (global.File && obj instanceof File)
	        ) {
	      return true;
	    }

	    if (isArray(obj)) {
	      for (var i = 0; i < obj.length; i++) {
	          if (_hasBinary(obj[i])) {
	              return true;
	          }
	      }
	    } else if (obj && 'object' == typeof obj) {
	      // see: https://github.com/Automattic/has-binary/pull/4
	      if (obj.toJSON && 'function' == typeof obj.toJSON) {
	        obj = obj.toJSON();
	      }

	      for (var key in obj) {
	        if (Object.prototype.hasOwnProperty.call(obj, key) && _hasBinary(obj[key])) {
	          return true;
	        }
	      }
	    }

	    return false;
	  }

	  return _hasBinary(data);
	}

	/* WEBPACK VAR INJECTION */}.call(exports, (function() { return this; }())))

/***/ },
/* 116 */
/***/ function(module, exports) {

	module.exports = Array.isArray || function (arr) {
	  return Object.prototype.toString.call(arr) == '[object Array]';
	};


/***/ },
/* 117 */
/***/ function(module, exports) {

	
	/**
	 * Expose `Backoff`.
	 */

	module.exports = Backoff;

	/**
	 * Initialize backoff timer with `opts`.
	 *
	 * - `min` initial timeout in milliseconds [100]
	 * - `max` max timeout [10000]
	 * - `jitter` [0]
	 * - `factor` [2]
	 *
	 * @param {Object} opts
	 * @api public
	 */

	function Backoff(opts) {
	  opts = opts || {};
	  this.ms = opts.min || 100;
	  this.max = opts.max || 10000;
	  this.factor = opts.factor || 2;
	  this.jitter = opts.jitter > 0 && opts.jitter <= 1 ? opts.jitter : 0;
	  this.attempts = 0;
	}

	/**
	 * Return the backoff duration.
	 *
	 * @return {Number}
	 * @api public
	 */

	Backoff.prototype.duration = function(){
	  var ms = this.ms * Math.pow(this.factor, this.attempts++);
	  if (this.jitter) {
	    var rand =  Math.random();
	    var deviation = Math.floor(rand * this.jitter * ms);
	    ms = (Math.floor(rand * 10) & 1) == 0  ? ms - deviation : ms + deviation;
	  }
	  return Math.min(ms, this.max) | 0;
	};

	/**
	 * Reset the number of attempts.
	 *
	 * @api public
	 */

	Backoff.prototype.reset = function(){
	  this.attempts = 0;
	};

	/**
	 * Set the minimum duration
	 *
	 * @api public
	 */

	Backoff.prototype.setMin = function(min){
	  this.ms = min;
	};

	/**
	 * Set the maximum duration
	 *
	 * @api public
	 */

	Backoff.prototype.setMax = function(max){
	  this.max = max;
	};

	/**
	 * Set the jitter
	 *
	 * @api public
	 */

	Backoff.prototype.setJitter = function(jitter){
	  this.jitter = jitter;
	};



/***/ },
/* 118 */
/***/ function(module, exports, __webpack_require__) {

	'use strict';

	var _getPrototypeOf = __webpack_require__(119);

	var _getPrototypeOf2 = _interopRequireDefault(_getPrototypeOf);

	var _classCallCheck2 = __webpack_require__(56);

	var _classCallCheck3 = _interopRequireDefault(_classCallCheck2);

	var _createClass2 = __webpack_require__(57);

	var _createClass3 = _interopRequireDefault(_createClass2);

	var _possibleConstructorReturn2 = __webpack_require__(124);

	var _possibleConstructorReturn3 = _interopRequireDefault(_possibleConstructorReturn2);

	var _get2 = __webpack_require__(133);

	var _get3 = _interopRequireDefault(_get2);

	var _inherits2 = __webpack_require__(137);

	var _inherits3 = _interopRequireDefault(_inherits2);

	function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

	var Store = __webpack_require__(143);
	var CounterIndex = __webpack_require__(241);

	var CounterStore = function (_Store) {
	  (0, _inherits3.default)(CounterStore, _Store);

	  function CounterStore(ipfs, dbname, options) {
	    (0, _classCallCheck3.default)(this, CounterStore);

	    var _this = (0, _possibleConstructorReturn3.default)(this, (0, _getPrototypeOf2.default)(CounterStore).call(this, ipfs, dbname, options));

	    _this._index = new CounterIndex();
	    return _this;
	  }

	  (0, _createClass3.default)(CounterStore, [{
	    key: 'use',
	    value: function use(id) {
	      this._index.createCounter(id);
	      return (0, _get3.default)((0, _getPrototypeOf2.default)(CounterStore.prototype), 'use', this).call(this, id);
	    }
	  }, {
	    key: 'delete',
	    value: function _delete() {
	      (0, _get3.default)((0, _getPrototypeOf2.default)(CounterStore.prototype), 'delete', this).call(this);
	      this._index = new CounterIndex();
	    }
	  }, {
	    key: 'value',
	    value: function value() {
	      return this._index.get().value;
	    }
	  }, {
	    key: 'inc',
	    value: function inc(amount) {
	      var counter = this._index.get();
	      if (counter) {
	        counter.increment(amount);
	        return this._addOperation('COUNTER', null, counter.payload);
	      }
	    }
	  }]);
	  return CounterStore;
	}(Store);

	module.exports = CounterStore;

/***/ },
/* 119 */
/***/ function(module, exports, __webpack_require__) {

	module.exports = { "default": __webpack_require__(120), __esModule: true };

/***/ },
/* 120 */
/***/ function(module, exports, __webpack_require__) {

	__webpack_require__(121);
	module.exports = __webpack_require__(12).Object.getPrototypeOf;

/***/ },
/* 121 */
/***/ function(module, exports, __webpack_require__) {

	// 19.1.2.9 Object.getPrototypeOf(O)
	var toObject = __webpack_require__(122);

	__webpack_require__(123)('getPrototypeOf', function($getPrototypeOf){
	  return function getPrototypeOf(it){
	    return $getPrototypeOf(toObject(it));
	  };
	});

/***/ },
/* 122 */
/***/ function(module, exports, __webpack_require__) {

	// 7.1.13 ToObject(argument)
	var defined = __webpack_require__(7);
	module.exports = function(it){
	  return Object(defined(it));
	};

/***/ },
/* 123 */
/***/ function(module, exports, __webpack_require__) {

	// most Object methods by ES6 should accept primitives
	var $export = __webpack_require__(10)
	  , core    = __webpack_require__(12)
	  , fails   = __webpack_require__(20);
	module.exports = function(KEY, exec){
	  var fn  = (core.Object || {})[KEY] || Object[KEY]
	    , exp = {};
	  exp[KEY] = exec(fn);
	  $export($export.S + $export.F * fails(function(){ fn(1); }), 'Object', exp);
	};

/***/ },
/* 124 */
/***/ function(module, exports, __webpack_require__) {

	"use strict";

	exports.__esModule = true;

	var _typeof2 = __webpack_require__(125);

	var _typeof3 = _interopRequireDefault(_typeof2);

	function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

	exports.default = function (self, call) {
	  if (!self) {
	    throw new ReferenceError("this hasn't been initialised - super() hasn't been called");
	  }

	  return call && ((typeof call === "undefined" ? "undefined" : (0, _typeof3.default)(call)) === "object" || typeof call === "function") ? call : self;
	};

/***/ },
/* 125 */
/***/ function(module, exports, __webpack_require__) {

	"use strict";

	var _Symbol = __webpack_require__(126)["default"];

	exports["default"] = function (obj) {
	  return obj && obj.constructor === _Symbol ? "symbol" : typeof obj;
	};

	exports.__esModule = true;

/***/ },
/* 126 */
/***/ function(module, exports, __webpack_require__) {

	module.exports = { "default": __webpack_require__(127), __esModule: true };

/***/ },
/* 127 */
/***/ function(module, exports, __webpack_require__) {

	__webpack_require__(128);
	__webpack_require__(3);
	module.exports = __webpack_require__(12).Symbol;

/***/ },
/* 128 */
/***/ function(module, exports, __webpack_require__) {

	'use strict';
	// ECMAScript 6 symbols shim
	var $              = __webpack_require__(17)
	  , global         = __webpack_require__(11)
	  , has            = __webpack_require__(21)
	  , DESCRIPTORS    = __webpack_require__(19)
	  , $export        = __webpack_require__(10)
	  , redefine       = __webpack_require__(15)
	  , $fails         = __webpack_require__(20)
	  , shared         = __webpack_require__(26)
	  , setToStringTag = __webpack_require__(24)
	  , uid            = __webpack_require__(27)
	  , wks            = __webpack_require__(25)
	  , keyOf          = __webpack_require__(129)
	  , $names         = __webpack_require__(130)
	  , enumKeys       = __webpack_require__(131)
	  , isArray        = __webpack_require__(132)
	  , anObject       = __webpack_require__(38)
	  , toIObject      = __webpack_require__(32)
	  , createDesc     = __webpack_require__(18)
	  , getDesc        = $.getDesc
	  , setDesc        = $.setDesc
	  , _create        = $.create
	  , getNames       = $names.get
	  , $Symbol        = global.Symbol
	  , $JSON          = global.JSON
	  , _stringify     = $JSON && $JSON.stringify
	  , setter         = false
	  , HIDDEN         = wks('_hidden')
	  , isEnum         = $.isEnum
	  , SymbolRegistry = shared('symbol-registry')
	  , AllSymbols     = shared('symbols')
	  , useNative      = typeof $Symbol == 'function'
	  , ObjectProto    = Object.prototype;

	// fallback for old Android, https://code.google.com/p/v8/issues/detail?id=687
	var setSymbolDesc = DESCRIPTORS && $fails(function(){
	  return _create(setDesc({}, 'a', {
	    get: function(){ return setDesc(this, 'a', {value: 7}).a; }
	  })).a != 7;
	}) ? function(it, key, D){
	  var protoDesc = getDesc(ObjectProto, key);
	  if(protoDesc)delete ObjectProto[key];
	  setDesc(it, key, D);
	  if(protoDesc && it !== ObjectProto)setDesc(ObjectProto, key, protoDesc);
	} : setDesc;

	var wrap = function(tag){
	  var sym = AllSymbols[tag] = _create($Symbol.prototype);
	  sym._k = tag;
	  DESCRIPTORS && setter && setSymbolDesc(ObjectProto, tag, {
	    configurable: true,
	    set: function(value){
	      if(has(this, HIDDEN) && has(this[HIDDEN], tag))this[HIDDEN][tag] = false;
	      setSymbolDesc(this, tag, createDesc(1, value));
	    }
	  });
	  return sym;
	};

	var isSymbol = function(it){
	  return typeof it == 'symbol';
	};

	var $defineProperty = function defineProperty(it, key, D){
	  if(D && has(AllSymbols, key)){
	    if(!D.enumerable){
	      if(!has(it, HIDDEN))setDesc(it, HIDDEN, createDesc(1, {}));
	      it[HIDDEN][key] = true;
	    } else {
	      if(has(it, HIDDEN) && it[HIDDEN][key])it[HIDDEN][key] = false;
	      D = _create(D, {enumerable: createDesc(0, false)});
	    } return setSymbolDesc(it, key, D);
	  } return setDesc(it, key, D);
	};
	var $defineProperties = function defineProperties(it, P){
	  anObject(it);
	  var keys = enumKeys(P = toIObject(P))
	    , i    = 0
	    , l = keys.length
	    , key;
	  while(l > i)$defineProperty(it, key = keys[i++], P[key]);
	  return it;
	};
	var $create = function create(it, P){
	  return P === undefined ? _create(it) : $defineProperties(_create(it), P);
	};
	var $propertyIsEnumerable = function propertyIsEnumerable(key){
	  var E = isEnum.call(this, key);
	  return E || !has(this, key) || !has(AllSymbols, key) || has(this, HIDDEN) && this[HIDDEN][key]
	    ? E : true;
	};
	var $getOwnPropertyDescriptor = function getOwnPropertyDescriptor(it, key){
	  var D = getDesc(it = toIObject(it), key);
	  if(D && has(AllSymbols, key) && !(has(it, HIDDEN) && it[HIDDEN][key]))D.enumerable = true;
	  return D;
	};
	var $getOwnPropertyNames = function getOwnPropertyNames(it){
	  var names  = getNames(toIObject(it))
	    , result = []
	    , i      = 0
	    , key;
	  while(names.length > i)if(!has(AllSymbols, key = names[i++]) && key != HIDDEN)result.push(key);
	  return result;
	};
	var $getOwnPropertySymbols = function getOwnPropertySymbols(it){
	  var names  = getNames(toIObject(it))
	    , result = []
	    , i      = 0
	    , key;
	  while(names.length > i)if(has(AllSymbols, key = names[i++]))result.push(AllSymbols[key]);
	  return result;
	};
	var $stringify = function stringify(it){
	  if(it === undefined || isSymbol(it))return; // IE8 returns string on undefined
	  var args = [it]
	    , i    = 1
	    , $$   = arguments
	    , replacer, $replacer;
	  while($$.length > i)args.push($$[i++]);
	  replacer = args[1];
	  if(typeof replacer == 'function')$replacer = replacer;
	  if($replacer || !isArray(replacer))replacer = function(key, value){
	    if($replacer)value = $replacer.call(this, key, value);
	    if(!isSymbol(value))return value;
	  };
	  args[1] = replacer;
	  return _stringify.apply($JSON, args);
	};
	var buggyJSON = $fails(function(){
	  var S = $Symbol();
	  // MS Edge converts symbol values to JSON as {}
	  // WebKit converts symbol values to JSON as null
	  // V8 throws on boxed symbols
	  return _stringify([S]) != '[null]' || _stringify({a: S}) != '{}' || _stringify(Object(S)) != '{}';
	});

	// 19.4.1.1 Symbol([description])
	if(!useNative){
	  $Symbol = function Symbol(){
	    if(isSymbol(this))throw TypeError('Symbol is not a constructor');
	    return wrap(uid(arguments.length > 0 ? arguments[0] : undefined));
	  };
	  redefine($Symbol.prototype, 'toString', function toString(){
	    return this._k;
	  });

	  isSymbol = function(it){
	    return it instanceof $Symbol;
	  };

	  $.create     = $create;
	  $.isEnum     = $propertyIsEnumerable;
	  $.getDesc    = $getOwnPropertyDescriptor;
	  $.setDesc    = $defineProperty;
	  $.setDescs   = $defineProperties;
	  $.getNames   = $names.get = $getOwnPropertyNames;
	  $.getSymbols = $getOwnPropertySymbols;

	  if(DESCRIPTORS && !__webpack_require__(9)){
	    redefine(ObjectProto, 'propertyIsEnumerable', $propertyIsEnumerable, true);
	  }
	}

	var symbolStatics = {
	  // 19.4.2.1 Symbol.for(key)
	  'for': function(key){
	    return has(SymbolRegistry, key += '')
	      ? SymbolRegistry[key]
	      : SymbolRegistry[key] = $Symbol(key);
	  },
	  // 19.4.2.5 Symbol.keyFor(sym)
	  keyFor: function keyFor(key){
	    return keyOf(SymbolRegistry, key);
	  },
	  useSetter: function(){ setter = true; },
	  useSimple: function(){ setter = false; }
	};
	// 19.4.2.2 Symbol.hasInstance
	// 19.4.2.3 Symbol.isConcatSpreadable
	// 19.4.2.4 Symbol.iterator
	// 19.4.2.6 Symbol.match
	// 19.4.2.8 Symbol.replace
	// 19.4.2.9 Symbol.search
	// 19.4.2.10 Symbol.species
	// 19.4.2.11 Symbol.split
	// 19.4.2.12 Symbol.toPrimitive
	// 19.4.2.13 Symbol.toStringTag
	// 19.4.2.14 Symbol.unscopables
	$.each.call((
	  'hasInstance,isConcatSpreadable,iterator,match,replace,search,' +
	  'species,split,toPrimitive,toStringTag,unscopables'
	).split(','), function(it){
	  var sym = wks(it);
	  symbolStatics[it] = useNative ? sym : wrap(sym);
	});

	setter = true;

	$export($export.G + $export.W, {Symbol: $Symbol});

	$export($export.S, 'Symbol', symbolStatics);

	$export($export.S + $export.F * !useNative, 'Object', {
	  // 19.1.2.2 Object.create(O [, Properties])
	  create: $create,
	  // 19.1.2.4 Object.defineProperty(O, P, Attributes)
	  defineProperty: $defineProperty,
	  // 19.1.2.3 Object.defineProperties(O, Properties)
	  defineProperties: $defineProperties,
	  // 19.1.2.6 Object.getOwnPropertyDescriptor(O, P)
	  getOwnPropertyDescriptor: $getOwnPropertyDescriptor,
	  // 19.1.2.7 Object.getOwnPropertyNames(O)
	  getOwnPropertyNames: $getOwnPropertyNames,
	  // 19.1.2.8 Object.getOwnPropertySymbols(O)
	  getOwnPropertySymbols: $getOwnPropertySymbols
	});

	// 24.3.2 JSON.stringify(value [, replacer [, space]])
	$JSON && $export($export.S + $export.F * (!useNative || buggyJSON), 'JSON', {stringify: $stringify});

	// 19.4.3.5 Symbol.prototype[@@toStringTag]
	setToStringTag($Symbol, 'Symbol');
	// 20.2.1.9 Math[@@toStringTag]
	setToStringTag(Math, 'Math', true);
	// 24.3.3 JSON[@@toStringTag]
	setToStringTag(global.JSON, 'JSON', true);

/***/ },
/* 129 */
/***/ function(module, exports, __webpack_require__) {

	var $         = __webpack_require__(17)
	  , toIObject = __webpack_require__(32);
	module.exports = function(object, el){
	  var O      = toIObject(object)
	    , keys   = $.getKeys(O)
	    , length = keys.length
	    , index  = 0
	    , key;
	  while(length > index)if(O[key = keys[index++]] === el)return key;
	};

/***/ },
/* 130 */
/***/ function(module, exports, __webpack_require__) {

	// fallback for IE11 buggy Object.getOwnPropertyNames with iframe and window
	var toIObject = __webpack_require__(32)
	  , getNames  = __webpack_require__(17).getNames
	  , toString  = {}.toString;

	var windowNames = typeof window == 'object' && Object.getOwnPropertyNames
	  ? Object.getOwnPropertyNames(window) : [];

	var getWindowNames = function(it){
	  try {
	    return getNames(it);
	  } catch(e){
	    return windowNames.slice();
	  }
	};

	module.exports.get = function getOwnPropertyNames(it){
	  if(windowNames && toString.call(it) == '[object Window]')return getWindowNames(it);
	  return getNames(toIObject(it));
	};

/***/ },
/* 131 */
/***/ function(module, exports, __webpack_require__) {

	// all enumerable object keys, includes symbols
	var $ = __webpack_require__(17);
	module.exports = function(it){
	  var keys       = $.getKeys(it)
	    , getSymbols = $.getSymbols;
	  if(getSymbols){
	    var symbols = getSymbols(it)
	      , isEnum  = $.isEnum
	      , i       = 0
	      , key;
	    while(symbols.length > i)if(isEnum.call(it, key = symbols[i++]))keys.push(key);
	  }
	  return keys;
	};

/***/ },
/* 132 */
/***/ function(module, exports, __webpack_require__) {

	// 7.2.2 IsArray(argument)
	var cof = __webpack_require__(34);
	module.exports = Array.isArray || function(arg){
	  return cof(arg) == 'Array';
	};

/***/ },
/* 133 */
/***/ function(module, exports, __webpack_require__) {

	"use strict";

	var _Object$getOwnPropertyDescriptor = __webpack_require__(134)["default"];

	exports["default"] = function get(_x, _x2, _x3) {
	  var _again = true;

	  _function: while (_again) {
	    var object = _x,
	        property = _x2,
	        receiver = _x3;
	    _again = false;
	    if (object === null) object = Function.prototype;

	    var desc = _Object$getOwnPropertyDescriptor(object, property);

	    if (desc === undefined) {
	      var parent = Object.getPrototypeOf(object);

	      if (parent === null) {
	        return undefined;
	      } else {
	        _x = parent;
	        _x2 = property;
	        _x3 = receiver;
	        _again = true;
	        desc = parent = undefined;
	        continue _function;
	      }
	    } else if ("value" in desc) {
	      return desc.value;
	    } else {
	      var getter = desc.get;

	      if (getter === undefined) {
	        return undefined;
	      }

	      return getter.call(receiver);
	    }
	  }
	};

	exports.__esModule = true;

/***/ },
/* 134 */
/***/ function(module, exports, __webpack_require__) {

	module.exports = { "default": __webpack_require__(135), __esModule: true };

/***/ },
/* 135 */
/***/ function(module, exports, __webpack_require__) {

	var $ = __webpack_require__(17);
	__webpack_require__(136);
	module.exports = function getOwnPropertyDescriptor(it, key){
	  return $.getDesc(it, key);
	};

/***/ },
/* 136 */
/***/ function(module, exports, __webpack_require__) {

	// 19.1.2.6 Object.getOwnPropertyDescriptor(O, P)
	var toIObject = __webpack_require__(32);

	__webpack_require__(123)('getOwnPropertyDescriptor', function($getOwnPropertyDescriptor){
	  return function getOwnPropertyDescriptor(it, key){
	    return $getOwnPropertyDescriptor(toIObject(it), key);
	  };
	});

/***/ },
/* 137 */
/***/ function(module, exports, __webpack_require__) {

	"use strict";

	var _Object$create = __webpack_require__(138)["default"];

	var _Object$setPrototypeOf = __webpack_require__(140)["default"];

	exports["default"] = function (subClass, superClass) {
	  if (typeof superClass !== "function" && superClass !== null) {
	    throw new TypeError("Super expression must either be null or a function, not " + typeof superClass);
	  }

	  subClass.prototype = _Object$create(superClass && superClass.prototype, {
	    constructor: {
	      value: subClass,
	      enumerable: false,
	      writable: true,
	      configurable: true
	    }
	  });
	  if (superClass) _Object$setPrototypeOf ? _Object$setPrototypeOf(subClass, superClass) : subClass.__proto__ = superClass;
	};

	exports.__esModule = true;

/***/ },
/* 138 */
/***/ function(module, exports, __webpack_require__) {

	module.exports = { "default": __webpack_require__(139), __esModule: true };

/***/ },
/* 139 */
/***/ function(module, exports, __webpack_require__) {

	var $ = __webpack_require__(17);
	module.exports = function create(P, D){
	  return $.create(P, D);
	};

/***/ },
/* 140 */
/***/ function(module, exports, __webpack_require__) {

	module.exports = { "default": __webpack_require__(141), __esModule: true };

/***/ },
/* 141 */
/***/ function(module, exports, __webpack_require__) {

	__webpack_require__(142);
	module.exports = __webpack_require__(12).Object.setPrototypeOf;

/***/ },
/* 142 */
/***/ function(module, exports, __webpack_require__) {

	// 19.1.3.19 Object.setPrototypeOf(O, proto)
	var $export = __webpack_require__(10);
	$export($export.S, 'Object', {setPrototypeOf: __webpack_require__(45).set});

/***/ },
/* 143 */
/***/ function(module, exports, __webpack_require__) {

	'use strict';

	var _promise = __webpack_require__(1);

	var _promise2 = _interopRequireDefault(_promise);

	var _classCallCheck2 = __webpack_require__(56);

	var _classCallCheck3 = _interopRequireDefault(_classCallCheck2);

	var _createClass2 = __webpack_require__(57);

	var _createClass3 = _interopRequireDefault(_createClass2);

	function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

	var EventEmitter = __webpack_require__(60).EventEmitter;
	var OperationsLog = __webpack_require__(144);
	var DefaultIndex = __webpack_require__(240);

	var Store = function () {
	  function Store(ipfs, dbname, options) {
	    (0, _classCallCheck3.default)(this, Store);

	    this.dbname = dbname;
	    this.events = new EventEmitter();
	    this.options = options || {};
	    this._index = new DefaultIndex();
	    this._oplog = null;
	    this._ipfs = ipfs;
	  }

	  (0, _createClass3.default)(Store, [{
	    key: 'use',
	    value: function use(id) {
	      var _this = this;

	      this.events.emit('load', this.dbname);
	      this._oplog = new OperationsLog(this._ipfs, this.dbname, this.options);
	      return this._oplog.load(id).then(function (merged) {
	        return _this._index.updateIndex(_this._oplog, merged);
	      }).then(function () {
	        return _this.events.emit('readable', _this.dbname);
	      }).then(function () {
	        return _this.events;
	      });
	    }
	  }, {
	    key: 'close',
	    value: function close() {
	      this.events.emit('close', this.dbname);
	    }
	  }, {
	    key: 'sync',
	    value: function sync(hash) {
	      var _this2 = this;

	      if (!hash || hash === this._oplog._lastWrite || !this._oplog) return _promise2.default.resolve([]);

	      var newItems = void 0;
	      this.events.emit('load', this.dbname);
	      return this._oplog.merge(hash).then(function (merged) {
	        return newItems = merged;
	      }).then(function () {
	        return _this2._index.updateIndex(_this2._oplog, newItems);
	      }).then(function () {
	        if (newItems.length > 0) _this2.events.emit('readable', _this2.dbname);
	      }).then(function () {
	        return newItems;
	      });
	    }
	  }, {
	    key: 'delete',
	    value: function _delete() {
	      if (this._oplog) this._oplog.delete();
	    }
	  }, {
	    key: '_addOperation',
	    value: function _addOperation(type, key, data) {
	      var _this3 = this;

	      var result = void 0;
	      if (this._oplog) {
	        return this._oplog.addOperation(type, key, data).then(function (op) {
	          return result = op;
	        }).then(function () {
	          return _this3._index.updateIndex(_this3._oplog, [result.operation]);
	        }).then(function () {
	          return _this3.events.emit('data', _this3.dbname, result.log);
	        }).then(function () {
	          return result.operation.hash;
	        });
	      }
	    }
	  }]);
	  return Store;
	}();

	module.exports = Store;

/***/ },
/* 144 */
/***/ function(module, exports, __webpack_require__) {

	'use strict';

	var _promise = __webpack_require__(1);

	var _promise2 = _interopRequireDefault(_promise);

	var _assign = __webpack_require__(145);

	var _assign2 = _interopRequireDefault(_assign);

	var _classCallCheck2 = __webpack_require__(56);

	var _classCallCheck3 = _interopRequireDefault(_classCallCheck2);

	var _createClass2 = __webpack_require__(57);

	var _createClass3 = _interopRequireDefault(_createClass2);

	function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

	var Log = __webpack_require__(149);
	var Cache = __webpack_require__(239);

	var OperationsLog = function () {
	  function OperationsLog(ipfs, dbname, opts) {
	    (0, _classCallCheck3.default)(this, OperationsLog);

	    this.dbname = dbname;
	    this.options = opts || { cacheFile: null };
	    this._lastWrite = null;
	    this._ipfs = ipfs;
	    this._log = null;
	  }

	  (0, _createClass3.default)(OperationsLog, [{
	    key: 'addOperation',
	    value: function addOperation(operation, key, value) {
	      var _this = this;

	      var entry = {
	        op: operation,
	        key: key,
	        value: value
	      };

	      var node = void 0,
	          logHash = void 0;
	      return this._log.add(entry).then(function (op) {
	        return node = op;
	      }).then(function () {
	        // Add the hash of the log entry to the payload
	        (0, _assign2.default)(node.payload, { hash: node.hash });
	        if (node.payload.key === null) (0, _assign2.default)(node.payload, { key: node.hash });
	      }).then(function () {
	        return Log.getIpfsHash(_this._ipfs, _this._log);
	      }).then(function (hash) {
	        return logHash = hash;
	      }).then(function () {
	        return _this._lastWrite = logHash;
	      }).then(function () {
	        return Cache.set(_this.dbname, logHash);
	      }).then(function () {
	        return { operation: node.payload, log: logHash };
	      });
	    }
	  }, {
	    key: 'load',
	    value: function load(id) {
	      var _this2 = this;

	      return Log.create(this._ipfs, id).then(function (log) {
	        return _this2._log = log;
	      }).then(function () {
	        return Cache.loadCache(_this2.options.cacheFile);
	      }).then(function () {
	        return _this2.merge(Cache.get(_this2.dbname));
	      });
	    }
	  }, {
	    key: 'merge',
	    value: function merge(hash) {
	      var _this3 = this;

	      if (!hash || hash === this._lastWrite || !this._log) return _promise2.default.resolve([]);

	      var oldCount = this._log.items.length;
	      var newItems = [];
	      return Log.fromIpfsHash(this._ipfs, hash).then(function (other) {
	        return _this3._log.join(other);
	      }).then(function (merged) {
	        return newItems = merged;
	      }).then(function () {
	        return Cache.set(_this3.dbname, hash);
	      }).then(function () {
	        return newItems.map(function (f) {
	          return f.payload;
	        });
	      });
	    }
	  }, {
	    key: 'delete',
	    value: function _delete() {
	      this._log.clear();
	    }
	  }, {
	    key: 'ops',
	    get: function get() {
	      return this._log.items;
	    }
	  }]);
	  return OperationsLog;
	}();

	module.exports = OperationsLog;

/***/ },
/* 145 */
/***/ function(module, exports, __webpack_require__) {

	module.exports = { "default": __webpack_require__(146), __esModule: true };

/***/ },
/* 146 */
/***/ function(module, exports, __webpack_require__) {

	__webpack_require__(147);
	module.exports = __webpack_require__(12).Object.assign;

/***/ },
/* 147 */
/***/ function(module, exports, __webpack_require__) {

	// 19.1.3.1 Object.assign(target, source)
	var $export = __webpack_require__(10);

	$export($export.S + $export.F, 'Object', {assign: __webpack_require__(148)});

/***/ },
/* 148 */
/***/ function(module, exports, __webpack_require__) {

	// 19.1.2.1 Object.assign(target, source, ...)
	var $        = __webpack_require__(17)
	  , toObject = __webpack_require__(122)
	  , IObject  = __webpack_require__(33);

	// should work with symbols and should have deterministic property order (V8 bug)
	module.exports = __webpack_require__(20)(function(){
	  var a = Object.assign
	    , A = {}
	    , B = {}
	    , S = Symbol()
	    , K = 'abcdefghijklmnopqrst';
	  A[S] = 7;
	  K.split('').forEach(function(k){ B[k] = k; });
	  return a({}, A)[S] != 7 || Object.keys(a({}, B)).join('') != K;
	}) ? function assign(target, source){ // eslint-disable-line no-unused-vars
	  var T     = toObject(target)
	    , $$    = arguments
	    , $$len = $$.length
	    , index = 1
	    , getKeys    = $.getKeys
	    , getSymbols = $.getSymbols
	    , isEnum     = $.isEnum;
	  while($$len > index){
	    var S      = IObject($$[index++])
	      , keys   = getSymbols ? getKeys(S).concat(getSymbols(S)) : getKeys(S)
	      , length = keys.length
	      , j      = 0
	      , key;
	    while(length > j)if(isEnum.call(S, key = keys[j++]))T[key] = S[key];
	  }
	  return T;
	} : Object.assign;

/***/ },
/* 149 */
/***/ function(module, exports, __webpack_require__) {

	'use strict';

	var _stringify = __webpack_require__(150);

	var _stringify2 = _interopRequireDefault(_stringify);

	var _promise = __webpack_require__(153);

	var _promise2 = _interopRequireDefault(_promise);

	var _classCallCheck2 = __webpack_require__(220);

	var _classCallCheck3 = _interopRequireDefault(_classCallCheck2);

	var _createClass2 = __webpack_require__(221);

	var _createClass3 = _interopRequireDefault(_createClass2);

	function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

	var _ = __webpack_require__(225);
	var Lazy = __webpack_require__(226);
	var Buffer = __webpack_require__(229).Buffer;
	var Node = __webpack_require__(233);

	var MaxBatchSize = 10; // How many items to keep per local batch
	var MaxHistory = 256; // How many items to fetch on join

	var Log = function () {
	  function Log(ipfs, id, items) {
	    (0, _classCallCheck3.default)(this, Log);

	    this.id = id;
	    this._ipfs = ipfs;
	    this._items = items || [];
	    this._currentBatch = [];
	  }

	  (0, _createClass3.default)(Log, [{
	    key: 'add',
	    value: function add(data) {
	      var _this = this;

	      if (this._currentBatch.length >= MaxBatchSize) this._commit();

	      var heads = Log.findHeads(this);
	      return Node.create(this._ipfs, data, heads).then(function (node) {
	        _this._currentBatch.push(node);
	        return node;
	      });
	    }
	  }, {
	    key: 'join',
	    value: function join(other) {
	      var _this2 = this;

	      var current = Lazy(this._currentBatch).difference(this._items).toArray();
	      var diff = _.differenceWith(other.items, current, Node.equals);
	      var others = _.differenceWith(other.items, this._items, Node.equals);
	      var final = _.unionWith(current, others, Node.equals);
	      this._items = this._items.concat(final);
	      this._currentBatch = [];

	      // Fetch history
	      var nexts = _.flatten(other.items.map(function (f) {
	        return f.next;
	      }));
	      var promises = nexts.map(function (f) {
	        var all = _this2.items.map(function (a) {
	          return a.hash;
	        });
	        return _this2._fetchRecursive(_this2._ipfs, f, all, MaxHistory, 0).then(function (history) {
	          history.forEach(function (b) {
	            return _this2._insert(b);
	          });
	          return history;
	        });
	      });
	      return _promise2.default.all(promises).then(function (r) {
	        return diff;
	      });
	    }
	  }, {
	    key: 'clear',
	    value: function clear() {
	      this._items = [];
	      this._currentBatch = [];
	    }
	  }, {
	    key: '_insert',
	    value: function _insert(node) {
	      var _this3 = this;

	      var indices = Lazy(node.next).map(function (next) {
	        return Lazy(_this3._items).map(function (f) {
	          return f.hash;
	        }).indexOf(next);
	      }); // Find the item's parent's indices
	      var index = indices.toArray().length > 0 ? Math.max(indices.max() + 1, 0) : 0; // find the largest index (latest parent)
	      this._items.splice(index, 0, node);
	      return node;
	    }
	  }, {
	    key: '_commit',
	    value: function _commit() {
	      var current = Lazy(this._currentBatch).difference(this._items).toArray();
	      this._items = this._items.concat(current);
	      this._currentBatch = [];
	    }
	  }, {
	    key: '_fetchRecursive',
	    value: function _fetchRecursive(ipfs, hash, all, amount, depth) {
	      var _this4 = this;

	      var isReferenced = function isReferenced(list, item) {
	        return Lazy(list).reverse().find(function (f) {
	          return f === item;
	        }) !== undefined;
	      };
	      var result = [];

	      // If the given hash is in the given log (all) or if we're at maximum depth, return
	      if (isReferenced(all, hash) || depth >= amount) return _promise2.default.resolve(result);

	      // Create the node and add it to the result
	      return Node.fromIpfsHash(ipfs, hash).then(function (node) {
	        result.push(node);
	        all.push(hash);
	        depth++;

	        var promises = node.next.map(function (f) {
	          return _this4._fetchRecursive(ipfs, f, all, amount, depth);
	        });
	        return _promise2.default.all(promises).then(function (res) {
	          return _.flatten(res.concat(result));
	        });
	      });
	    }
	  }, {
	    key: 'items',
	    get: function get() {
	      return this._items.concat(this._currentBatch);
	    }
	  }, {
	    key: 'snapshot',
	    get: function get() {
	      return {
	        id: this.id,
	        items: this._currentBatch.map(function (f) {
	          return f.hash;
	        })
	      };
	    }
	  }], [{
	    key: 'create',
	    value: function create(ipfs, id, items) {
	      if (!ipfs) throw new Error("Ipfs instance not defined");
	      if (!id) throw new Error("id is not defined");
	      var log = new Log(ipfs, id, items);
	      return _promise2.default.resolve(log);
	    }
	  }, {
	    key: 'getIpfsHash',
	    value: function getIpfsHash(ipfs, log) {
	      if (!ipfs) throw new Error("Ipfs instance not defined");
	      var data = new Buffer((0, _stringify2.default)({ Data: (0, _stringify2.default)(log.snapshot) }));
	      return ipfs.object.put(data).then(function (res) {
	        return res.Hash;
	      });
	    }
	  }, {
	    key: 'fromJson',
	    value: function fromJson(ipfs, json) {
	      return _promise2.default.all(json.items.map(function (f) {
	        return Node.fromIpfsHash(ipfs, f);
	      })).then(function (items) {
	        return Log.create(ipfs, json.id, items);
	      });
	    }
	  }, {
	    key: 'fromIpfsHash',
	    value: function fromIpfsHash(ipfs, hash) {
	      if (!ipfs) throw new Error("Ipfs instance not defined");
	      if (!hash) throw new Error("Invalid hash: " + hash);
	      return ipfs.object.get(hash).then(function (res) {
	        return Log.fromJson(ipfs, JSON.parse(res.Data));
	      });
	    }
	  }, {
	    key: 'findHeads',
	    value: function findHeads(log) {
	      return Lazy(log.items).reverse().filter(function (f) {
	        return !Log.isReferencedInChain(log, f);
	      }).map(function (f) {
	        return f.hash;
	      }).toArray();
	    }
	  }, {
	    key: 'isReferencedInChain',
	    value: function isReferencedInChain(log, item) {
	      return Lazy(log.items).reverse().find(function (e) {
	        return e.hasChild(item);
	      }) !== undefined;
	    }
	  }, {
	    key: 'batchSize',
	    get: function get() {
	      return MaxBatchSize;
	    }
	  }, {
	    key: 'maxHistory',
	    get: function get() {
	      return MaxHistory;
	    }
	  }]);
	  return Log;
	}();

	module.exports = Log;

/***/ },
/* 150 */
/***/ function(module, exports, __webpack_require__) {

	module.exports = { "default": __webpack_require__(151), __esModule: true };

/***/ },
/* 151 */
/***/ function(module, exports, __webpack_require__) {

	var core  = __webpack_require__(152)
	  , $JSON = core.JSON || (core.JSON = {stringify: JSON.stringify});
	module.exports = function stringify(it){ // eslint-disable-line no-unused-vars
	  return $JSON.stringify.apply($JSON, arguments);
	};

/***/ },
/* 152 */
/***/ function(module, exports) {

	var core = module.exports = {version: '2.3.0'};
	if(typeof __e == 'number')__e = core; // eslint-disable-line no-undef

/***/ },
/* 153 */
/***/ function(module, exports, __webpack_require__) {

	module.exports = { "default": __webpack_require__(154), __esModule: true };

/***/ },
/* 154 */
/***/ function(module, exports, __webpack_require__) {

	__webpack_require__(155);
	__webpack_require__(156);
	__webpack_require__(199);
	__webpack_require__(203);
	module.exports = __webpack_require__(152).Promise;

/***/ },
/* 155 */
/***/ function(module, exports) {

	

/***/ },
/* 156 */
/***/ function(module, exports, __webpack_require__) {

	'use strict';
	var $at  = __webpack_require__(157)(true);

	// 21.1.3.27 String.prototype[@@iterator]()
	__webpack_require__(160)(String, 'String', function(iterated){
	  this._t = String(iterated); // target
	  this._i = 0;                // next index
	// 21.1.5.2.1 %StringIteratorPrototype%.next()
	}, function(){
	  var O     = this._t
	    , index = this._i
	    , point;
	  if(index >= O.length)return {value: undefined, done: true};
	  point = $at(O, index);
	  this._i += point.length;
	  return {value: point, done: false};
	});

/***/ },
/* 157 */
/***/ function(module, exports, __webpack_require__) {

	var toInteger = __webpack_require__(158)
	  , defined   = __webpack_require__(159);
	// true  -> String#at
	// false -> String#codePointAt
	module.exports = function(TO_STRING){
	  return function(that, pos){
	    var s = String(defined(that))
	      , i = toInteger(pos)
	      , l = s.length
	      , a, b;
	    if(i < 0 || i >= l)return TO_STRING ? '' : undefined;
	    a = s.charCodeAt(i);
	    return a < 0xd800 || a > 0xdbff || i + 1 === l || (b = s.charCodeAt(i + 1)) < 0xdc00 || b > 0xdfff
	      ? TO_STRING ? s.charAt(i) : a
	      : TO_STRING ? s.slice(i, i + 2) : (a - 0xd800 << 10) + (b - 0xdc00) + 0x10000;
	  };
	};

/***/ },
/* 158 */
/***/ function(module, exports) {

	// 7.1.4 ToInteger
	var ceil  = Math.ceil
	  , floor = Math.floor;
	module.exports = function(it){
	  return isNaN(it = +it) ? 0 : (it > 0 ? floor : ceil)(it);
	};

/***/ },
/* 159 */
/***/ function(module, exports) {

	// 7.2.1 RequireObjectCoercible(argument)
	module.exports = function(it){
	  if(it == undefined)throw TypeError("Can't call method on  " + it);
	  return it;
	};

/***/ },
/* 160 */
/***/ function(module, exports, __webpack_require__) {

	'use strict';
	var LIBRARY        = __webpack_require__(161)
	  , $export        = __webpack_require__(162)
	  , redefine       = __webpack_require__(176)
	  , hide           = __webpack_require__(166)
	  , has            = __webpack_require__(177)
	  , Iterators      = __webpack_require__(178)
	  , $iterCreate    = __webpack_require__(179)
	  , setToStringTag = __webpack_require__(195)
	  , getPrototypeOf = __webpack_require__(197)
	  , ITERATOR       = __webpack_require__(196)('iterator')
	  , BUGGY          = !([].keys && 'next' in [].keys()) // Safari has buggy iterators w/o `next`
	  , FF_ITERATOR    = '@@iterator'
	  , KEYS           = 'keys'
	  , VALUES         = 'values';

	var returnThis = function(){ return this; };

	module.exports = function(Base, NAME, Constructor, next, DEFAULT, IS_SET, FORCED){
	  $iterCreate(Constructor, NAME, next);
	  var getMethod = function(kind){
	    if(!BUGGY && kind in proto)return proto[kind];
	    switch(kind){
	      case KEYS: return function keys(){ return new Constructor(this, kind); };
	      case VALUES: return function values(){ return new Constructor(this, kind); };
	    } return function entries(){ return new Constructor(this, kind); };
	  };
	  var TAG        = NAME + ' Iterator'
	    , DEF_VALUES = DEFAULT == VALUES
	    , VALUES_BUG = false
	    , proto      = Base.prototype
	    , $native    = proto[ITERATOR] || proto[FF_ITERATOR] || DEFAULT && proto[DEFAULT]
	    , $default   = $native || getMethod(DEFAULT)
	    , $entries   = DEFAULT ? !DEF_VALUES ? $default : getMethod('entries') : undefined
	    , $anyNative = NAME == 'Array' ? proto.entries || $native : $native
	    , methods, key, IteratorPrototype;
	  // Fix native
	  if($anyNative){
	    IteratorPrototype = getPrototypeOf($anyNative.call(new Base));
	    if(IteratorPrototype !== Object.prototype){
	      // Set @@toStringTag to native iterators
	      setToStringTag(IteratorPrototype, TAG, true);
	      // fix for some old engines
	      if(!LIBRARY && !has(IteratorPrototype, ITERATOR))hide(IteratorPrototype, ITERATOR, returnThis);
	    }
	  }
	  // fix Array#{values, @@iterator}.name in V8 / FF
	  if(DEF_VALUES && $native && $native.name !== VALUES){
	    VALUES_BUG = true;
	    $default = function values(){ return $native.call(this); };
	  }
	  // Define iterator
	  if((!LIBRARY || FORCED) && (BUGGY || VALUES_BUG || !proto[ITERATOR])){
	    hide(proto, ITERATOR, $default);
	  }
	  // Plug for library
	  Iterators[NAME] = $default;
	  Iterators[TAG]  = returnThis;
	  if(DEFAULT){
	    methods = {
	      values:  DEF_VALUES ? $default : getMethod(VALUES),
	      keys:    IS_SET     ? $default : getMethod(KEYS),
	      entries: $entries
	    };
	    if(FORCED)for(key in methods){
	      if(!(key in proto))redefine(proto, key, methods[key]);
	    } else $export($export.P + $export.F * (BUGGY || VALUES_BUG), NAME, methods);
	  }
	  return methods;
	};

/***/ },
/* 161 */
/***/ function(module, exports) {

	module.exports = true;

/***/ },
/* 162 */
/***/ function(module, exports, __webpack_require__) {

	var global    = __webpack_require__(163)
	  , core      = __webpack_require__(152)
	  , ctx       = __webpack_require__(164)
	  , hide      = __webpack_require__(166)
	  , PROTOTYPE = 'prototype';

	var $export = function(type, name, source){
	  var IS_FORCED = type & $export.F
	    , IS_GLOBAL = type & $export.G
	    , IS_STATIC = type & $export.S
	    , IS_PROTO  = type & $export.P
	    , IS_BIND   = type & $export.B
	    , IS_WRAP   = type & $export.W
	    , exports   = IS_GLOBAL ? core : core[name] || (core[name] = {})
	    , expProto  = exports[PROTOTYPE]
	    , target    = IS_GLOBAL ? global : IS_STATIC ? global[name] : (global[name] || {})[PROTOTYPE]
	    , key, own, out;
	  if(IS_GLOBAL)source = name;
	  for(key in source){
	    // contains in native
	    own = !IS_FORCED && target && target[key] !== undefined;
	    if(own && key in exports)continue;
	    // export native or passed
	    out = own ? target[key] : source[key];
	    // prevent global pollution for namespaces
	    exports[key] = IS_GLOBAL && typeof target[key] != 'function' ? source[key]
	    // bind timers to global for call from export context
	    : IS_BIND && own ? ctx(out, global)
	    // wrap global constructors for prevent change them in library
	    : IS_WRAP && target[key] == out ? (function(C){
	      var F = function(a, b, c){
	        if(this instanceof C){
	          switch(arguments.length){
	            case 0: return new C;
	            case 1: return new C(a);
	            case 2: return new C(a, b);
	          } return new C(a, b, c);
	        } return C.apply(this, arguments);
	      };
	      F[PROTOTYPE] = C[PROTOTYPE];
	      return F;
	    // make static versions for prototype methods
	    })(out) : IS_PROTO && typeof out == 'function' ? ctx(Function.call, out) : out;
	    // export proto methods to core.%CONSTRUCTOR%.methods.%NAME%
	    if(IS_PROTO){
	      (exports.virtual || (exports.virtual = {}))[key] = out;
	      // export proto methods to core.%CONSTRUCTOR%.prototype.%NAME%
	      if(type & $export.R && expProto && !expProto[key])hide(expProto, key, out);
	    }
	  }
	};
	// type bitmap
	$export.F = 1;   // forced
	$export.G = 2;   // global
	$export.S = 4;   // static
	$export.P = 8;   // proto
	$export.B = 16;  // bind
	$export.W = 32;  // wrap
	$export.U = 64;  // safe
	$export.R = 128; // real proto method for `library` 
	module.exports = $export;

/***/ },
/* 163 */
/***/ function(module, exports) {

	// https://github.com/zloirock/core-js/issues/86#issuecomment-115759028
	var global = module.exports = typeof window != 'undefined' && window.Math == Math
	  ? window : typeof self != 'undefined' && self.Math == Math ? self : Function('return this')();
	if(typeof __g == 'number')__g = global; // eslint-disable-line no-undef

/***/ },
/* 164 */
/***/ function(module, exports, __webpack_require__) {

	// optional / simple context binding
	var aFunction = __webpack_require__(165);
	module.exports = function(fn, that, length){
	  aFunction(fn);
	  if(that === undefined)return fn;
	  switch(length){
	    case 1: return function(a){
	      return fn.call(that, a);
	    };
	    case 2: return function(a, b){
	      return fn.call(that, a, b);
	    };
	    case 3: return function(a, b, c){
	      return fn.call(that, a, b, c);
	    };
	  }
	  return function(/* ...args */){
	    return fn.apply(that, arguments);
	  };
	};

/***/ },
/* 165 */
/***/ function(module, exports) {

	module.exports = function(it){
	  if(typeof it != 'function')throw TypeError(it + ' is not a function!');
	  return it;
	};

/***/ },
/* 166 */
/***/ function(module, exports, __webpack_require__) {

	var dP         = __webpack_require__(167)
	  , createDesc = __webpack_require__(175);
	module.exports = __webpack_require__(171) ? function(object, key, value){
	  return dP.f(object, key, createDesc(1, value));
	} : function(object, key, value){
	  object[key] = value;
	  return object;
	};

/***/ },
/* 167 */
/***/ function(module, exports, __webpack_require__) {

	var anObject       = __webpack_require__(168)
	  , IE8_DOM_DEFINE = __webpack_require__(170)
	  , toPrimitive    = __webpack_require__(174)
	  , dP             = Object.defineProperty;

	exports.f = __webpack_require__(171) ? Object.defineProperty : function defineProperty(O, P, Attributes){
	  anObject(O);
	  P = toPrimitive(P, true);
	  anObject(Attributes);
	  if(IE8_DOM_DEFINE)try {
	    return dP(O, P, Attributes);
	  } catch(e){ /* empty */ }
	  if('get' in Attributes || 'set' in Attributes)throw TypeError('Accessors not supported!');
	  if('value' in Attributes)O[P] = Attributes.value;
	  return O;
	};

/***/ },
/* 168 */
/***/ function(module, exports, __webpack_require__) {

	var isObject = __webpack_require__(169);
	module.exports = function(it){
	  if(!isObject(it))throw TypeError(it + ' is not an object!');
	  return it;
	};

/***/ },
/* 169 */
/***/ function(module, exports) {

	module.exports = function(it){
	  return typeof it === 'object' ? it !== null : typeof it === 'function';
	};

/***/ },
/* 170 */
/***/ function(module, exports, __webpack_require__) {

	module.exports = !__webpack_require__(171) && !__webpack_require__(172)(function(){
	  return Object.defineProperty(__webpack_require__(173)('div'), 'a', {get: function(){ return 7; }}).a != 7;
	});

/***/ },
/* 171 */
/***/ function(module, exports, __webpack_require__) {

	// Thank's IE8 for his funny defineProperty
	module.exports = !__webpack_require__(172)(function(){
	  return Object.defineProperty({}, 'a', {get: function(){ return 7; }}).a != 7;
	});

/***/ },
/* 172 */
/***/ function(module, exports) {

	module.exports = function(exec){
	  try {
	    return !!exec();
	  } catch(e){
	    return true;
	  }
	};

/***/ },
/* 173 */
/***/ function(module, exports, __webpack_require__) {

	var isObject = __webpack_require__(169)
	  , document = __webpack_require__(163).document
	  // in old IE typeof document.createElement is 'object'
	  , is = isObject(document) && isObject(document.createElement);
	module.exports = function(it){
	  return is ? document.createElement(it) : {};
	};

/***/ },
/* 174 */
/***/ function(module, exports, __webpack_require__) {

	// 7.1.1 ToPrimitive(input [, PreferredType])
	var isObject = __webpack_require__(169);
	// instead of the ES6 spec version, we didn't implement @@toPrimitive case
	// and the second argument - flag - preferred type is a string
	module.exports = function(it, S){
	  if(!isObject(it))return it;
	  var fn, val;
	  if(S && typeof (fn = it.toString) == 'function' && !isObject(val = fn.call(it)))return val;
	  if(typeof (fn = it.valueOf) == 'function' && !isObject(val = fn.call(it)))return val;
	  if(!S && typeof (fn = it.toString) == 'function' && !isObject(val = fn.call(it)))return val;
	  throw TypeError("Can't convert object to primitive value");
	};

/***/ },
/* 175 */
/***/ function(module, exports) {

	module.exports = function(bitmap, value){
	  return {
	    enumerable  : !(bitmap & 1),
	    configurable: !(bitmap & 2),
	    writable    : !(bitmap & 4),
	    value       : value
	  };
	};

/***/ },
/* 176 */
/***/ function(module, exports, __webpack_require__) {

	module.exports = __webpack_require__(166);

/***/ },
/* 177 */
/***/ function(module, exports) {

	var hasOwnProperty = {}.hasOwnProperty;
	module.exports = function(it, key){
	  return hasOwnProperty.call(it, key);
	};

/***/ },
/* 178 */
/***/ function(module, exports) {

	module.exports = {};

/***/ },
/* 179 */
/***/ function(module, exports, __webpack_require__) {

	'use strict';
	var create         = __webpack_require__(180)
	  , descriptor     = __webpack_require__(175)
	  , setToStringTag = __webpack_require__(195)
	  , IteratorPrototype = {};

	// 25.1.2.1.1 %IteratorPrototype%[@@iterator]()
	__webpack_require__(166)(IteratorPrototype, __webpack_require__(196)('iterator'), function(){ return this; });

	module.exports = function(Constructor, NAME, next){
	  Constructor.prototype = create(IteratorPrototype, {next: descriptor(1, next)});
	  setToStringTag(Constructor, NAME + ' Iterator');
	};

/***/ },
/* 180 */
/***/ function(module, exports, __webpack_require__) {

	// 19.1.2.2 / 15.2.3.5 Object.create(O [, Properties])
	var anObject    = __webpack_require__(168)
	  , dPs         = __webpack_require__(181)
	  , enumBugKeys = __webpack_require__(193)
	  , IE_PROTO    = __webpack_require__(190)('IE_PROTO')
	  , Empty       = function(){ /* empty */ }
	  , PROTOTYPE   = 'prototype';

	// Create object with fake `null` prototype: use iframe Object with cleared prototype
	var createDict = function(){
	  // Thrash, waste and sodomy: IE GC bug
	  var iframe = __webpack_require__(173)('iframe')
	    , i      = enumBugKeys.length
	    , gt     = '>'
	    , iframeDocument;
	  iframe.style.display = 'none';
	  __webpack_require__(194).appendChild(iframe);
	  iframe.src = 'javascript:'; // eslint-disable-line no-script-url
	  // createDict = iframe.contentWindow.Object;
	  // html.removeChild(iframe);
	  iframeDocument = iframe.contentWindow.document;
	  iframeDocument.open();
	  iframeDocument.write('<script>document.F=Object</script' + gt);
	  iframeDocument.close();
	  createDict = iframeDocument.F;
	  while(i--)delete createDict[PROTOTYPE][enumBugKeys[i]];
	  return createDict();
	};

	module.exports = Object.create || function create(O, Properties){
	  var result;
	  if(O !== null){
	    Empty[PROTOTYPE] = anObject(O);
	    result = new Empty;
	    Empty[PROTOTYPE] = null;
	    // add "__proto__" for Object.getPrototypeOf polyfill
	    result[IE_PROTO] = O;
	  } else result = createDict();
	  return Properties === undefined ? result : dPs(result, Properties);
	};

/***/ },
/* 181 */
/***/ function(module, exports, __webpack_require__) {

	var dP       = __webpack_require__(167)
	  , anObject = __webpack_require__(168)
	  , getKeys  = __webpack_require__(182);

	module.exports = __webpack_require__(171) ? Object.defineProperties : function defineProperties(O, Properties){
	  anObject(O);
	  var keys   = getKeys(Properties)
	    , length = keys.length
	    , i = 0
	    , P;
	  while(length > i)dP.f(O, P = keys[i++], Properties[P]);
	  return O;
	};

/***/ },
/* 182 */
/***/ function(module, exports, __webpack_require__) {

	// 19.1.2.14 / 15.2.3.14 Object.keys(O)
	var $keys       = __webpack_require__(183)
	  , enumBugKeys = __webpack_require__(193);

	module.exports = Object.keys || function keys(O){
	  return $keys(O, enumBugKeys);
	};

/***/ },
/* 183 */
/***/ function(module, exports, __webpack_require__) {

	var has          = __webpack_require__(177)
	  , toIObject    = __webpack_require__(184)
	  , arrayIndexOf = __webpack_require__(187)(false)
	  , IE_PROTO     = __webpack_require__(190)('IE_PROTO');

	module.exports = function(object, names){
	  var O      = toIObject(object)
	    , i      = 0
	    , result = []
	    , key;
	  for(key in O)if(key != IE_PROTO)has(O, key) && result.push(key);
	  // Don't enum bug & hidden keys
	  while(names.length > i)if(has(O, key = names[i++])){
	    ~arrayIndexOf(result, key) || result.push(key);
	  }
	  return result;
	};

/***/ },
/* 184 */
/***/ function(module, exports, __webpack_require__) {

	// to indexed object, toObject with fallback for non-array-like ES3 strings
	var IObject = __webpack_require__(185)
	  , defined = __webpack_require__(159);
	module.exports = function(it){
	  return IObject(defined(it));
	};

/***/ },
/* 185 */
/***/ function(module, exports, __webpack_require__) {

	// fallback for non-array-like ES3 and non-enumerable old V8 strings
	var cof = __webpack_require__(186);
	module.exports = Object('z').propertyIsEnumerable(0) ? Object : function(it){
	  return cof(it) == 'String' ? it.split('') : Object(it);
	};

/***/ },
/* 186 */
/***/ function(module, exports) {

	var toString = {}.toString;

	module.exports = function(it){
	  return toString.call(it).slice(8, -1);
	};

/***/ },
/* 187 */
/***/ function(module, exports, __webpack_require__) {

	// false -> Array#indexOf
	// true  -> Array#includes
	var toIObject = __webpack_require__(184)
	  , toLength  = __webpack_require__(188)
	  , toIndex   = __webpack_require__(189);
	module.exports = function(IS_INCLUDES){
	  return function($this, el, fromIndex){
	    var O      = toIObject($this)
	      , length = toLength(O.length)
	      , index  = toIndex(fromIndex, length)
	      , value;
	    // Array#includes uses SameValueZero equality algorithm
	    if(IS_INCLUDES && el != el)while(length > index){
	      value = O[index++];
	      if(value != value)return true;
	    // Array#toIndex ignores holes, Array#includes - not
	    } else for(;length > index; index++)if(IS_INCLUDES || index in O){
	      if(O[index] === el)return IS_INCLUDES || index || 0;
	    } return !IS_INCLUDES && -1;
	  };
	};

/***/ },
/* 188 */
/***/ function(module, exports, __webpack_require__) {

	// 7.1.15 ToLength
	var toInteger = __webpack_require__(158)
	  , min       = Math.min;
	module.exports = function(it){
	  return it > 0 ? min(toInteger(it), 0x1fffffffffffff) : 0; // pow(2, 53) - 1 == 9007199254740991
	};

/***/ },
/* 189 */
/***/ function(module, exports, __webpack_require__) {

	var toInteger = __webpack_require__(158)
	  , max       = Math.max
	  , min       = Math.min;
	module.exports = function(index, length){
	  index = toInteger(index);
	  return index < 0 ? max(index + length, 0) : min(index, length);
	};

/***/ },
/* 190 */
/***/ function(module, exports, __webpack_require__) {

	var shared = __webpack_require__(191)('keys')
	  , uid    = __webpack_require__(192);
	module.exports = function(key){
	  return shared[key] || (shared[key] = uid(key));
	};

/***/ },
/* 191 */
/***/ function(module, exports, __webpack_require__) {

	var global = __webpack_require__(163)
	  , SHARED = '__core-js_shared__'
	  , store  = global[SHARED] || (global[SHARED] = {});
	module.exports = function(key){
	  return store[key] || (store[key] = {});
	};

/***/ },
/* 192 */
/***/ function(module, exports) {

	var id = 0
	  , px = Math.random();
	module.exports = function(key){
	  return 'Symbol('.concat(key === undefined ? '' : key, ')_', (++id + px).toString(36));
	};

/***/ },
/* 193 */
/***/ function(module, exports) {

	// IE 8- don't enum bug keys
	module.exports = (
	  'constructor,hasOwnProperty,isPrototypeOf,propertyIsEnumerable,toLocaleString,toString,valueOf'
	).split(',');

/***/ },
/* 194 */
/***/ function(module, exports, __webpack_require__) {

	module.exports = __webpack_require__(163).document && document.documentElement;

/***/ },
/* 195 */
/***/ function(module, exports, __webpack_require__) {

	var def = __webpack_require__(167).f
	  , has = __webpack_require__(177)
	  , TAG = __webpack_require__(196)('toStringTag');

	module.exports = function(it, tag, stat){
	  if(it && !has(it = stat ? it : it.prototype, TAG))def(it, TAG, {configurable: true, value: tag});
	};

/***/ },
/* 196 */
/***/ function(module, exports, __webpack_require__) {

	var store      = __webpack_require__(191)('wks')
	  , uid        = __webpack_require__(192)
	  , Symbol     = __webpack_require__(163).Symbol
	  , USE_SYMBOL = typeof Symbol == 'function';

	var $exports = module.exports = function(name){
	  return store[name] || (store[name] =
	    USE_SYMBOL && Symbol[name] || (USE_SYMBOL ? Symbol : uid)('Symbol.' + name));
	};

	$exports.store = store;

/***/ },
/* 197 */
/***/ function(module, exports, __webpack_require__) {

	// 19.1.2.9 / 15.2.3.2 Object.getPrototypeOf(O)
	var has         = __webpack_require__(177)
	  , toObject    = __webpack_require__(198)
	  , IE_PROTO    = __webpack_require__(190)('IE_PROTO')
	  , ObjectProto = Object.prototype;

	module.exports = Object.getPrototypeOf || function(O){
	  O = toObject(O);
	  if(has(O, IE_PROTO))return O[IE_PROTO];
	  if(typeof O.constructor == 'function' && O instanceof O.constructor){
	    return O.constructor.prototype;
	  } return O instanceof Object ? ObjectProto : null;
	};

/***/ },
/* 198 */
/***/ function(module, exports, __webpack_require__) {

	// 7.1.13 ToObject(argument)
	var defined = __webpack_require__(159);
	module.exports = function(it){
	  return Object(defined(it));
	};

/***/ },
/* 199 */
/***/ function(module, exports, __webpack_require__) {

	__webpack_require__(200);
	var global        = __webpack_require__(163)
	  , hide          = __webpack_require__(166)
	  , Iterators     = __webpack_require__(178)
	  , TO_STRING_TAG = __webpack_require__(196)('toStringTag');

	for(var collections = ['NodeList', 'DOMTokenList', 'MediaList', 'StyleSheetList', 'CSSRuleList'], i = 0; i < 5; i++){
	  var NAME       = collections[i]
	    , Collection = global[NAME]
	    , proto      = Collection && Collection.prototype;
	  if(proto && !proto[TO_STRING_TAG])hide(proto, TO_STRING_TAG, NAME);
	  Iterators[NAME] = Iterators.Array;
	}

/***/ },
/* 200 */
/***/ function(module, exports, __webpack_require__) {

	'use strict';
	var addToUnscopables = __webpack_require__(201)
	  , step             = __webpack_require__(202)
	  , Iterators        = __webpack_require__(178)
	  , toIObject        = __webpack_require__(184);

	// 22.1.3.4 Array.prototype.entries()
	// 22.1.3.13 Array.prototype.keys()
	// 22.1.3.29 Array.prototype.values()
	// 22.1.3.30 Array.prototype[@@iterator]()
	module.exports = __webpack_require__(160)(Array, 'Array', function(iterated, kind){
	  this._t = toIObject(iterated); // target
	  this._i = 0;                   // next index
	  this._k = kind;                // kind
	// 22.1.5.2.1 %ArrayIteratorPrototype%.next()
	}, function(){
	  var O     = this._t
	    , kind  = this._k
	    , index = this._i++;
	  if(!O || index >= O.length){
	    this._t = undefined;
	    return step(1);
	  }
	  if(kind == 'keys'  )return step(0, index);
	  if(kind == 'values')return step(0, O[index]);
	  return step(0, [index, O[index]]);
	}, 'values');

	// argumentsList[@@iterator] is %ArrayProto_values% (9.4.4.6, 9.4.4.7)
	Iterators.Arguments = Iterators.Array;

	addToUnscopables('keys');
	addToUnscopables('values');
	addToUnscopables('entries');

/***/ },
/* 201 */
/***/ function(module, exports) {

	module.exports = function(){ /* empty */ };

/***/ },
/* 202 */
/***/ function(module, exports) {

	module.exports = function(done, value){
	  return {value: value, done: !!done};
	};

/***/ },
/* 203 */
/***/ function(module, exports, __webpack_require__) {

	'use strict';
	var LIBRARY            = __webpack_require__(161)
	  , global             = __webpack_require__(163)
	  , ctx                = __webpack_require__(164)
	  , classof            = __webpack_require__(204)
	  , $export            = __webpack_require__(162)
	  , isObject           = __webpack_require__(169)
	  , anObject           = __webpack_require__(168)
	  , aFunction          = __webpack_require__(165)
	  , anInstance         = __webpack_require__(205)
	  , forOf              = __webpack_require__(206)
	  , setProto           = __webpack_require__(210).set
	  , speciesConstructor = __webpack_require__(213)
	  , task               = __webpack_require__(214).set
	  , microtask          = __webpack_require__(216)()
	  , PROMISE            = 'Promise'
	  , TypeError          = global.TypeError
	  , process            = global.process
	  , $Promise           = global[PROMISE]
	  , process            = global.process
	  , isNode             = classof(process) == 'process'
	  , empty              = function(){ /* empty */ }
	  , Internal, GenericPromiseCapability, Wrapper;

	var USE_NATIVE = !!function(){
	  try {
	    // correct subclassing with @@species support
	    var promise     = $Promise.resolve(1)
	      , FakePromise = (promise.constructor = {})[__webpack_require__(196)('species')] = function(exec){ exec(empty, empty); };
	    // unhandled rejections tracking support, NodeJS Promise without it fails @@species test
	    return (isNode || typeof PromiseRejectionEvent == 'function') && promise.then(empty) instanceof FakePromise;
	  } catch(e){ /* empty */ }
	}();

	// helpers
	var sameConstructor = function(a, b){
	  // with library wrapper special case
	  return a === b || a === $Promise && b === Wrapper;
	};
	var isThenable = function(it){
	  var then;
	  return isObject(it) && typeof (then = it.then) == 'function' ? then : false;
	};
	var newPromiseCapability = function(C){
	  return sameConstructor($Promise, C)
	    ? new PromiseCapability(C)
	    : new GenericPromiseCapability(C);
	};
	var PromiseCapability = GenericPromiseCapability = function(C){
	  var resolve, reject;
	  this.promise = new C(function($$resolve, $$reject){
	    if(resolve !== undefined || reject !== undefined)throw TypeError('Bad Promise constructor');
	    resolve = $$resolve;
	    reject  = $$reject;
	  });
	  this.resolve = aFunction(resolve);
	  this.reject  = aFunction(reject);
	};
	var perform = function(exec){
	  try {
	    exec();
	  } catch(e){
	    return {error: e};
	  }
	};
	var notify = function(promise, isReject){
	  if(promise._n)return;
	  promise._n = true;
	  var chain = promise._c;
	  microtask(function(){
	    var value = promise._v
	      , ok    = promise._s == 1
	      , i     = 0;
	    var run = function(reaction){
	      var handler = ok ? reaction.ok : reaction.fail
	        , resolve = reaction.resolve
	        , reject  = reaction.reject
	        , domain  = reaction.domain
	        , result, then;
	      try {
	        if(handler){
	          if(!ok){
	            if(promise._h == 2)onHandleUnhandled(promise);
	            promise._h = 1;
	          }
	          if(handler === true)result = value;
	          else {
	            if(domain)domain.enter();
	            result = handler(value);
	            if(domain)domain.exit();
	          }
	          if(result === reaction.promise){
	            reject(TypeError('Promise-chain cycle'));
	          } else if(then = isThenable(result)){
	            then.call(result, resolve, reject);
	          } else resolve(result);
	        } else reject(value);
	      } catch(e){
	        reject(e);
	      }
	    };
	    while(chain.length > i)run(chain[i++]); // variable length - can't use forEach
	    promise._c = [];
	    promise._n = false;
	    if(isReject && !promise._h)onUnhandled(promise);
	  });
	};
	var onUnhandled = function(promise){
	  task.call(global, function(){
	    var value = promise._v
	      , abrupt, handler, console;
	    if(isUnhandled(promise)){
	      abrupt = perform(function(){
	        if(isNode){
	          process.emit('unhandledRejection', value, promise);
	        } else if(handler = global.onunhandledrejection){
	          handler({promise: promise, reason: value});
	        } else if((console = global.console) && console.error){
	          console.error('Unhandled promise rejection', value);
	        }
	      });
	      // Browsers should not trigger `rejectionHandled` event if it was handled here, NodeJS - should
	      promise._h = isNode || isUnhandled(promise) ? 2 : 1;
	    } promise._a = undefined;
	    if(abrupt)throw abrupt.error;
	  });
	};
	var isUnhandled = function(promise){
	  if(promise._h == 1)return false;
	  var chain = promise._a || promise._c
	    , i     = 0
	    , reaction;
	  while(chain.length > i){
	    reaction = chain[i++];
	    if(reaction.fail || !isUnhandled(reaction.promise))return false;
	  } return true;
	};
	var onHandleUnhandled = function(promise){
	  task.call(global, function(){
	    var handler;
	    if(isNode){
	      process.emit('rejectionHandled', promise);
	    } else if(handler = global.onrejectionhandled){
	      handler({promise: promise, reason: promise._v});
	    }
	  });
	};
	var $reject = function(value){
	  var promise = this;
	  if(promise._d)return;
	  promise._d = true;
	  promise = promise._w || promise; // unwrap
	  promise._v = value;
	  promise._s = 2;
	  if(!promise._a)promise._a = promise._c.slice();
	  notify(promise, true);
	};
	var $resolve = function(value){
	  var promise = this
	    , then;
	  if(promise._d)return;
	  promise._d = true;
	  promise = promise._w || promise; // unwrap
	  try {
	    if(promise === value)throw TypeError("Promise can't be resolved itself");
	    if(then = isThenable(value)){
	      microtask(function(){
	        var wrapper = {_w: promise, _d: false}; // wrap
	        try {
	          then.call(value, ctx($resolve, wrapper, 1), ctx($reject, wrapper, 1));
	        } catch(e){
	          $reject.call(wrapper, e);
	        }
	      });
	    } else {
	      promise._v = value;
	      promise._s = 1;
	      notify(promise, false);
	    }
	  } catch(e){
	    $reject.call({_w: promise, _d: false}, e); // wrap
	  }
	};

	// constructor polyfill
	if(!USE_NATIVE){
	  // 25.4.3.1 Promise(executor)
	  $Promise = function Promise(executor){
	    anInstance(this, $Promise, PROMISE, '_h');
	    aFunction(executor);
	    Internal.call(this);
	    try {
	      executor(ctx($resolve, this, 1), ctx($reject, this, 1));
	    } catch(err){
	      $reject.call(this, err);
	    }
	  };
	  Internal = function Promise(executor){
	    this._c = [];             // <- awaiting reactions
	    this._a = undefined;      // <- checked in isUnhandled reactions
	    this._s = 0;              // <- state
	    this._d = false;          // <- done
	    this._v = undefined;      // <- value
	    this._h = 0;              // <- rejection state, 0 - default, 1 - handled, 2 - unhandled
	    this._n = false;          // <- notify
	  };
	  Internal.prototype = __webpack_require__(217)($Promise.prototype, {
	    // 25.4.5.3 Promise.prototype.then(onFulfilled, onRejected)
	    then: function then(onFulfilled, onRejected){
	      var reaction    = newPromiseCapability(speciesConstructor(this, $Promise));
	      reaction.ok     = typeof onFulfilled == 'function' ? onFulfilled : true;
	      reaction.fail   = typeof onRejected == 'function' && onRejected;
	      reaction.domain = isNode ? process.domain : undefined;
	      this._c.push(reaction);
	      if(this._a)this._a.push(reaction);
	      if(this._s)notify(this, false);
	      return reaction.promise;
	    },
	    // 25.4.5.1 Promise.prototype.catch(onRejected)
	    'catch': function(onRejected){
	      return this.then(undefined, onRejected);
	    }
	  });
	  PromiseCapability = function(){
	    var promise  = new Internal;
	    this.promise = promise;
	    this.resolve = ctx($resolve, promise, 1);
	    this.reject  = ctx($reject, promise, 1);
	  };
	}

	$export($export.G + $export.W + $export.F * !USE_NATIVE, {Promise: $Promise});
	__webpack_require__(195)($Promise, PROMISE);
	__webpack_require__(218)(PROMISE);
	Wrapper = __webpack_require__(152)[PROMISE];

	// statics
	$export($export.S + $export.F * !USE_NATIVE, PROMISE, {
	  // 25.4.4.5 Promise.reject(r)
	  reject: function reject(r){
	    var capability = newPromiseCapability(this)
	      , $$reject   = capability.reject;
	    $$reject(r);
	    return capability.promise;
	  }
	});
	$export($export.S + $export.F * (LIBRARY || !USE_NATIVE), PROMISE, {
	  // 25.4.4.6 Promise.resolve(x)
	  resolve: function resolve(x){
	    // instanceof instead of internal slot check because we should fix it without replacement native Promise core
	    if(x instanceof $Promise && sameConstructor(x.constructor, this))return x;
	    var capability = newPromiseCapability(this)
	      , $$resolve  = capability.resolve;
	    $$resolve(x);
	    return capability.promise;
	  }
	});
	$export($export.S + $export.F * !(USE_NATIVE && __webpack_require__(219)(function(iter){
	  $Promise.all(iter)['catch'](empty);
	})), PROMISE, {
	  // 25.4.4.1 Promise.all(iterable)
	  all: function all(iterable){
	    var C          = this
	      , capability = newPromiseCapability(C)
	      , resolve    = capability.resolve
	      , reject     = capability.reject;
	    var abrupt = perform(function(){
	      var values    = []
	        , index     = 0
	        , remaining = 1;
	      forOf(iterable, false, function(promise){
	        var $index        = index++
	          , alreadyCalled = false;
	        values.push(undefined);
	        remaining++;
	        C.resolve(promise).then(function(value){
	          if(alreadyCalled)return;
	          alreadyCalled  = true;
	          values[$index] = value;
	          --remaining || resolve(values);
	        }, reject);
	      });
	      --remaining || resolve(values);
	    });
	    if(abrupt)reject(abrupt.error);
	    return capability.promise;
	  },
	  // 25.4.4.4 Promise.race(iterable)
	  race: function race(iterable){
	    var C          = this
	      , capability = newPromiseCapability(C)
	      , reject     = capability.reject;
	    var abrupt = perform(function(){
	      forOf(iterable, false, function(promise){
	        C.resolve(promise).then(capability.resolve, reject);
	      });
	    });
	    if(abrupt)reject(abrupt.error);
	    return capability.promise;
	  }
	});

/***/ },
/* 204 */
/***/ function(module, exports, __webpack_require__) {

	// getting tag from 19.1.3.6 Object.prototype.toString()
	var cof = __webpack_require__(186)
	  , TAG = __webpack_require__(196)('toStringTag')
	  // ES3 wrong here
	  , ARG = cof(function(){ return arguments; }()) == 'Arguments';

	// fallback for IE11 Script Access Denied error
	var tryGet = function(it, key){
	  try {
	    return it[key];
	  } catch(e){ /* empty */ }
	};

	module.exports = function(it){
	  var O, T, B;
	  return it === undefined ? 'Undefined' : it === null ? 'Null'
	    // @@toStringTag case
	    : typeof (T = tryGet(O = Object(it), TAG)) == 'string' ? T
	    // builtinTag case
	    : ARG ? cof(O)
	    // ES3 arguments fallback
	    : (B = cof(O)) == 'Object' && typeof O.callee == 'function' ? 'Arguments' : B;
	};

/***/ },
/* 205 */
/***/ function(module, exports) {

	module.exports = function(it, Constructor, name, forbiddenField){
	  if(!(it instanceof Constructor) || (forbiddenField !== undefined && forbiddenField in it)){
	    throw TypeError(name + ': incorrect invocation!');
	  } return it;
	};

/***/ },
/* 206 */
/***/ function(module, exports, __webpack_require__) {

	var ctx         = __webpack_require__(164)
	  , call        = __webpack_require__(207)
	  , isArrayIter = __webpack_require__(208)
	  , anObject    = __webpack_require__(168)
	  , toLength    = __webpack_require__(188)
	  , getIterFn   = __webpack_require__(209);
	module.exports = function(iterable, entries, fn, that, ITERATOR){
	  var iterFn = ITERATOR ? function(){ return iterable; } : getIterFn(iterable)
	    , f      = ctx(fn, that, entries ? 2 : 1)
	    , index  = 0
	    , length, step, iterator;
	  if(typeof iterFn != 'function')throw TypeError(iterable + ' is not iterable!');
	  // fast case for arrays with default iterator
	  if(isArrayIter(iterFn))for(length = toLength(iterable.length); length > index; index++){
	    entries ? f(anObject(step = iterable[index])[0], step[1]) : f(iterable[index]);
	  } else for(iterator = iterFn.call(iterable); !(step = iterator.next()).done; ){
	    call(iterator, f, step.value, entries);
	  }
	};

/***/ },
/* 207 */
/***/ function(module, exports, __webpack_require__) {

	// call something on iterator step with safe closing on error
	var anObject = __webpack_require__(168);
	module.exports = function(iterator, fn, value, entries){
	  try {
	    return entries ? fn(anObject(value)[0], value[1]) : fn(value);
	  // 7.4.6 IteratorClose(iterator, completion)
	  } catch(e){
	    var ret = iterator['return'];
	    if(ret !== undefined)anObject(ret.call(iterator));
	    throw e;
	  }
	};

/***/ },
/* 208 */
/***/ function(module, exports, __webpack_require__) {

	// check on default Array iterator
	var Iterators  = __webpack_require__(178)
	  , ITERATOR   = __webpack_require__(196)('iterator')
	  , ArrayProto = Array.prototype;

	module.exports = function(it){
	  return it !== undefined && (Iterators.Array === it || ArrayProto[ITERATOR] === it);
	};

/***/ },
/* 209 */
/***/ function(module, exports, __webpack_require__) {

	var classof   = __webpack_require__(204)
	  , ITERATOR  = __webpack_require__(196)('iterator')
	  , Iterators = __webpack_require__(178);
	module.exports = __webpack_require__(152).getIteratorMethod = function(it){
	  if(it != undefined)return it[ITERATOR]
	    || it['@@iterator']
	    || Iterators[classof(it)];
	};

/***/ },
/* 210 */
/***/ function(module, exports, __webpack_require__) {

	// Works with __proto__ only. Old v8 can't work with null proto objects.
	/* eslint-disable no-proto */
	var isObject = __webpack_require__(169)
	  , anObject = __webpack_require__(168);
	var check = function(O, proto){
	  anObject(O);
	  if(!isObject(proto) && proto !== null)throw TypeError(proto + ": can't set as prototype!");
	};
	module.exports = {
	  set: Object.setPrototypeOf || ('__proto__' in {} ? // eslint-disable-line
	    function(test, buggy, set){
	      try {
	        set = __webpack_require__(164)(Function.call, __webpack_require__(211).f(Object.prototype, '__proto__').set, 2);
	        set(test, []);
	        buggy = !(test instanceof Array);
	      } catch(e){ buggy = true; }
	      return function setPrototypeOf(O, proto){
	        check(O, proto);
	        if(buggy)O.__proto__ = proto;
	        else set(O, proto);
	        return O;
	      };
	    }({}, false) : undefined),
	  check: check
	};

/***/ },
/* 211 */
/***/ function(module, exports, __webpack_require__) {

	var pIE            = __webpack_require__(212)
	  , createDesc     = __webpack_require__(175)
	  , toIObject      = __webpack_require__(184)
	  , toPrimitive    = __webpack_require__(174)
	  , has            = __webpack_require__(177)
	  , IE8_DOM_DEFINE = __webpack_require__(170)
	  , gOPD           = Object.getOwnPropertyDescriptor;

	exports.f = __webpack_require__(171) ? gOPD : function getOwnPropertyDescriptor(O, P){
	  O = toIObject(O);
	  P = toPrimitive(P, true);
	  if(IE8_DOM_DEFINE)try {
	    return gOPD(O, P);
	  } catch(e){ /* empty */ }
	  if(has(O, P))return createDesc(!pIE.f.call(O, P), O[P]);
	};

/***/ },
/* 212 */
/***/ function(module, exports) {

	exports.f = {}.propertyIsEnumerable;

/***/ },
/* 213 */
/***/ function(module, exports, __webpack_require__) {

	// 7.3.20 SpeciesConstructor(O, defaultConstructor)
	var anObject  = __webpack_require__(168)
	  , aFunction = __webpack_require__(165)
	  , SPECIES   = __webpack_require__(196)('species');
	module.exports = function(O, D){
	  var C = anObject(O).constructor, S;
	  return C === undefined || (S = anObject(C)[SPECIES]) == undefined ? D : aFunction(S);
	};

/***/ },
/* 214 */
/***/ function(module, exports, __webpack_require__) {

	var ctx                = __webpack_require__(164)
	  , invoke             = __webpack_require__(215)
	  , html               = __webpack_require__(194)
	  , cel                = __webpack_require__(173)
	  , global             = __webpack_require__(163)
	  , process            = global.process
	  , setTask            = global.setImmediate
	  , clearTask          = global.clearImmediate
	  , MessageChannel     = global.MessageChannel
	  , counter            = 0
	  , queue              = {}
	  , ONREADYSTATECHANGE = 'onreadystatechange'
	  , defer, channel, port;
	var run = function(){
	  var id = +this;
	  if(queue.hasOwnProperty(id)){
	    var fn = queue[id];
	    delete queue[id];
	    fn();
	  }
	};
	var listener = function(event){
	  run.call(event.data);
	};
	// Node.js 0.9+ & IE10+ has setImmediate, otherwise:
	if(!setTask || !clearTask){
	  setTask = function setImmediate(fn){
	    var args = [], i = 1;
	    while(arguments.length > i)args.push(arguments[i++]);
	    queue[++counter] = function(){
	      invoke(typeof fn == 'function' ? fn : Function(fn), args);
	    };
	    defer(counter);
	    return counter;
	  };
	  clearTask = function clearImmediate(id){
	    delete queue[id];
	  };
	  // Node.js 0.8-
	  if(__webpack_require__(186)(process) == 'process'){
	    defer = function(id){
	      process.nextTick(ctx(run, id, 1));
	    };
	  // Browsers with MessageChannel, includes WebWorkers
	  } else if(MessageChannel){
	    channel = new MessageChannel;
	    port    = channel.port2;
	    channel.port1.onmessage = listener;
	    defer = ctx(port.postMessage, port, 1);
	  // Browsers with postMessage, skip WebWorkers
	  // IE8 has postMessage, but it's sync & typeof its postMessage is 'object'
	  } else if(global.addEventListener && typeof postMessage == 'function' && !global.importScripts){
	    defer = function(id){
	      global.postMessage(id + '', '*');
	    };
	    global.addEventListener('message', listener, false);
	  // IE8-
	  } else if(ONREADYSTATECHANGE in cel('script')){
	    defer = function(id){
	      html.appendChild(cel('script'))[ONREADYSTATECHANGE] = function(){
	        html.removeChild(this);
	        run.call(id);
	      };
	    };
	  // Rest old browsers
	  } else {
	    defer = function(id){
	      setTimeout(ctx(run, id, 1), 0);
	    };
	  }
	}
	module.exports = {
	  set:   setTask,
	  clear: clearTask
	};

/***/ },
/* 215 */
/***/ function(module, exports) {

	// fast apply, http://jsperf.lnkit.com/fast-apply/5
	module.exports = function(fn, args, that){
	  var un = that === undefined;
	  switch(args.length){
	    case 0: return un ? fn()
	                      : fn.call(that);
	    case 1: return un ? fn(args[0])
	                      : fn.call(that, args[0]);
	    case 2: return un ? fn(args[0], args[1])
	                      : fn.call(that, args[0], args[1]);
	    case 3: return un ? fn(args[0], args[1], args[2])
	                      : fn.call(that, args[0], args[1], args[2]);
	    case 4: return un ? fn(args[0], args[1], args[2], args[3])
	                      : fn.call(that, args[0], args[1], args[2], args[3]);
	  } return              fn.apply(that, args);
	};

/***/ },
/* 216 */
/***/ function(module, exports, __webpack_require__) {

	var global    = __webpack_require__(163)
	  , macrotask = __webpack_require__(214).set
	  , Observer  = global.MutationObserver || global.WebKitMutationObserver
	  , process   = global.process
	  , Promise   = global.Promise
	  , isNode    = __webpack_require__(186)(process) == 'process';

	module.exports = function(){
	  var head, last, notify;

	  var flush = function(){
	    var parent, fn;
	    if(isNode && (parent = process.domain))parent.exit();
	    while(head){
	      fn   = head.fn;
	      head = head.next;
	      try {
	        fn();
	      } catch(e){
	        if(head)notify();
	        else last = undefined;
	        throw e;
	      }
	    } last = undefined;
	    if(parent)parent.enter();
	  };

	  // Node.js
	  if(isNode){
	    notify = function(){
	      process.nextTick(flush);
	    };
	  // browsers with MutationObserver
	  } else if(Observer){
	    var toggle = true
	      , node   = document.createTextNode('');
	    new Observer(flush).observe(node, {characterData: true}); // eslint-disable-line no-new
	    notify = function(){
	      node.data = toggle = !toggle;
	    };
	  // environments with maybe non-completely correct, but existent Promise
	  } else if(Promise && Promise.resolve){
	    var promise = Promise.resolve();
	    notify = function(){
	      promise.then(flush);
	    };
	  // for other environments - macrotask based on:
	  // - setImmediate
	  // - MessageChannel
	  // - window.postMessag
	  // - onreadystatechange
	  // - setTimeout
	  } else {
	    notify = function(){
	      // strange IE + webpack dev server bug - use .call(global)
	      macrotask.call(global, flush);
	    };
	  }

	  return function(fn){
	    var task = {fn: fn, next: undefined};
	    if(last)last.next = task;
	    if(!head){
	      head = task;
	      notify();
	    } last = task;
	  };
	};

/***/ },
/* 217 */
/***/ function(module, exports, __webpack_require__) {

	var hide = __webpack_require__(166);
	module.exports = function(target, src, safe){
	  for(var key in src){
	    if(safe && target[key])target[key] = src[key];
	    else hide(target, key, src[key]);
	  } return target;
	};

/***/ },
/* 218 */
/***/ function(module, exports, __webpack_require__) {

	'use strict';
	var global      = __webpack_require__(163)
	  , core        = __webpack_require__(152)
	  , dP          = __webpack_require__(167)
	  , DESCRIPTORS = __webpack_require__(171)
	  , SPECIES     = __webpack_require__(196)('species');

	module.exports = function(KEY){
	  var C = typeof core[KEY] == 'function' ? core[KEY] : global[KEY];
	  if(DESCRIPTORS && C && !C[SPECIES])dP.f(C, SPECIES, {
	    configurable: true,
	    get: function(){ return this; }
	  });
	};

/***/ },
/* 219 */
/***/ function(module, exports, __webpack_require__) {

	var ITERATOR     = __webpack_require__(196)('iterator')
	  , SAFE_CLOSING = false;

	try {
	  var riter = [7][ITERATOR]();
	  riter['return'] = function(){ SAFE_CLOSING = true; };
	  Array.from(riter, function(){ throw 2; });
	} catch(e){ /* empty */ }

	module.exports = function(exec, skipClosing){
	  if(!skipClosing && !SAFE_CLOSING)return false;
	  var safe = false;
	  try {
	    var arr  = [7]
	      , iter = arr[ITERATOR]();
	    iter.next = function(){ return {done: safe = true}; };
	    arr[ITERATOR] = function(){ return iter; };
	    exec(arr);
	  } catch(e){ /* empty */ }
	  return safe;
	};

/***/ },
/* 220 */
/***/ function(module, exports) {

	"use strict";

	exports.__esModule = true;

	exports.default = function (instance, Constructor) {
	  if (!(instance instanceof Constructor)) {
	    throw new TypeError("Cannot call a class as a function");
	  }
	};

/***/ },
/* 221 */
/***/ function(module, exports, __webpack_require__) {

	"use strict";

	exports.__esModule = true;

	var _defineProperty = __webpack_require__(222);

	var _defineProperty2 = _interopRequireDefault(_defineProperty);

	function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

	exports.default = function () {
	  function defineProperties(target, props) {
	    for (var i = 0; i < props.length; i++) {
	      var descriptor = props[i];
	      descriptor.enumerable = descriptor.enumerable || false;
	      descriptor.configurable = true;
	      if ("value" in descriptor) descriptor.writable = true;
	      (0, _defineProperty2.default)(target, descriptor.key, descriptor);
	    }
	  }

	  return function (Constructor, protoProps, staticProps) {
	    if (protoProps) defineProperties(Constructor.prototype, protoProps);
	    if (staticProps) defineProperties(Constructor, staticProps);
	    return Constructor;
	  };
	}();

/***/ },
/* 222 */
/***/ function(module, exports, __webpack_require__) {

	module.exports = { "default": __webpack_require__(223), __esModule: true };

/***/ },
/* 223 */
/***/ function(module, exports, __webpack_require__) {

	__webpack_require__(224);
	var $Object = __webpack_require__(152).Object;
	module.exports = function defineProperty(it, key, desc){
	  return $Object.defineProperty(it, key, desc);
	};

/***/ },
/* 224 */
/***/ function(module, exports, __webpack_require__) {

	var $export = __webpack_require__(162);
	// 19.1.2.4 / 15.2.3.6 Object.defineProperty(O, P, Attributes)
	$export($export.S + $export.F * !__webpack_require__(171), 'Object', {defineProperty: __webpack_require__(167).f});

/***/ },
/* 225 */
/***/ function(module, exports, __webpack_require__) {

	var __WEBPACK_AMD_DEFINE_RESULT__;/* WEBPACK VAR INJECTION */(function(module, global) {/**
	 * @license
	 * lodash 4.11.1 (Custom Build) <https://lodash.com/>
	 * Build: `lodash -d -o ./foo/lodash.js`
	 * Copyright jQuery Foundation and other contributors <https://jquery.org/>
	 * Released under MIT license <https://lodash.com/license>
	 * Based on Underscore.js 1.8.3 <http://underscorejs.org/LICENSE>
	 * Copyright Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors
	 */
	;(function() {

	  /** Used as a safe reference for `undefined` in pre-ES5 environments. */
	  var undefined;

	  /** Used as the semantic version number. */
	  var VERSION = '4.11.1';

	  /** Used as the size to enable large array optimizations. */
	  var LARGE_ARRAY_SIZE = 200;

	  /** Used as the `TypeError` message for "Functions" methods. */
	  var FUNC_ERROR_TEXT = 'Expected a function';

	  /** Used to stand-in for `undefined` hash values. */
	  var HASH_UNDEFINED = '__lodash_hash_undefined__';

	  /** Used as the internal argument placeholder. */
	  var PLACEHOLDER = '__lodash_placeholder__';

	  /** Used to compose bitmasks for wrapper metadata. */
	  var BIND_FLAG = 1,
	      BIND_KEY_FLAG = 2,
	      CURRY_BOUND_FLAG = 4,
	      CURRY_FLAG = 8,
	      CURRY_RIGHT_FLAG = 16,
	      PARTIAL_FLAG = 32,
	      PARTIAL_RIGHT_FLAG = 64,
	      ARY_FLAG = 128,
	      REARG_FLAG = 256,
	      FLIP_FLAG = 512;

	  /** Used to compose bitmasks for comparison styles. */
	  var UNORDERED_COMPARE_FLAG = 1,
	      PARTIAL_COMPARE_FLAG = 2;

	  /** Used as default options for `_.truncate`. */
	  var DEFAULT_TRUNC_LENGTH = 30,
	      DEFAULT_TRUNC_OMISSION = '...';

	  /** Used to detect hot functions by number of calls within a span of milliseconds. */
	  var HOT_COUNT = 150,
	      HOT_SPAN = 16;

	  /** Used to indicate the type of lazy iteratees. */
	  var LAZY_FILTER_FLAG = 1,
	      LAZY_MAP_FLAG = 2,
	      LAZY_WHILE_FLAG = 3;

	  /** Used as references for various `Number` constants. */
	  var INFINITY = 1 / 0,
	      MAX_SAFE_INTEGER = 9007199254740991,
	      MAX_INTEGER = 1.7976931348623157e+308,
	      NAN = 0 / 0;

	  /** Used as references for the maximum length and index of an array. */
	  var MAX_ARRAY_LENGTH = 4294967295,
	      MAX_ARRAY_INDEX = MAX_ARRAY_LENGTH - 1,
	      HALF_MAX_ARRAY_LENGTH = MAX_ARRAY_LENGTH >>> 1;

	  /** `Object#toString` result references. */
	  var argsTag = '[object Arguments]',
	      arrayTag = '[object Array]',
	      boolTag = '[object Boolean]',
	      dateTag = '[object Date]',
	      errorTag = '[object Error]',
	      funcTag = '[object Function]',
	      genTag = '[object GeneratorFunction]',
	      mapTag = '[object Map]',
	      numberTag = '[object Number]',
	      objectTag = '[object Object]',
	      promiseTag = '[object Promise]',
	      regexpTag = '[object RegExp]',
	      setTag = '[object Set]',
	      stringTag = '[object String]',
	      symbolTag = '[object Symbol]',
	      weakMapTag = '[object WeakMap]',
	      weakSetTag = '[object WeakSet]';

	  var arrayBufferTag = '[object ArrayBuffer]',
	      dataViewTag = '[object DataView]',
	      float32Tag = '[object Float32Array]',
	      float64Tag = '[object Float64Array]',
	      int8Tag = '[object Int8Array]',
	      int16Tag = '[object Int16Array]',
	      int32Tag = '[object Int32Array]',
	      uint8Tag = '[object Uint8Array]',
	      uint8ClampedTag = '[object Uint8ClampedArray]',
	      uint16Tag = '[object Uint16Array]',
	      uint32Tag = '[object Uint32Array]';

	  /** Used to match empty string literals in compiled template source. */
	  var reEmptyStringLeading = /\b__p \+= '';/g,
	      reEmptyStringMiddle = /\b(__p \+=) '' \+/g,
	      reEmptyStringTrailing = /(__e\(.*?\)|\b__t\)) \+\n'';/g;

	  /** Used to match HTML entities and HTML characters. */
	  var reEscapedHtml = /&(?:amp|lt|gt|quot|#39|#96);/g,
	      reUnescapedHtml = /[&<>"'`]/g,
	      reHasEscapedHtml = RegExp(reEscapedHtml.source),
	      reHasUnescapedHtml = RegExp(reUnescapedHtml.source);

	  /** Used to match template delimiters. */
	  var reEscape = /<%-([\s\S]+?)%>/g,
	      reEvaluate = /<%([\s\S]+?)%>/g,
	      reInterpolate = /<%=([\s\S]+?)%>/g;

	  /** Used to match property names within property paths. */
	  var reIsDeepProp = /\.|\[(?:[^[\]]*|(["'])(?:(?!\1)[^\\]|\\.)*?\1)\]/,
	      reIsPlainProp = /^\w*$/,
	      rePropName = /[^.[\]]+|\[(?:(-?\d+(?:\.\d+)?)|(["'])((?:(?!\2)[^\\]|\\.)*?)\2)\]/g;

	  /**
	   * Used to match `RegExp`
	   * [syntax characters](http://ecma-international.org/ecma-262/6.0/#sec-patterns).
	   */
	  var reRegExpChar = /[\\^$.*+?()[\]{}|]/g,
	      reHasRegExpChar = RegExp(reRegExpChar.source);

	  /** Used to match leading and trailing whitespace. */
	  var reTrim = /^\s+|\s+$/g,
	      reTrimStart = /^\s+/,
	      reTrimEnd = /\s+$/;

	  /** Used to match non-compound words composed of alphanumeric characters. */
	  var reBasicWord = /[a-zA-Z0-9]+/g;

	  /** Used to match backslashes in property paths. */
	  var reEscapeChar = /\\(\\)?/g;

	  /**
	   * Used to match
	   * [ES template delimiters](http://ecma-international.org/ecma-262/6.0/#sec-template-literal-lexical-components).
	   */
	  var reEsTemplate = /\$\{([^\\}]*(?:\\.[^\\}]*)*)\}/g;

	  /** Used to match `RegExp` flags from their coerced string values. */
	  var reFlags = /\w*$/;

	  /** Used to detect hexadecimal string values. */
	  var reHasHexPrefix = /^0x/i;

	  /** Used to detect bad signed hexadecimal string values. */
	  var reIsBadHex = /^[-+]0x[0-9a-f]+$/i;

	  /** Used to detect binary string values. */
	  var reIsBinary = /^0b[01]+$/i;

	  /** Used to detect host constructors (Safari). */
	  var reIsHostCtor = /^\[object .+?Constructor\]$/;

	  /** Used to detect octal string values. */
	  var reIsOctal = /^0o[0-7]+$/i;

	  /** Used to detect unsigned integer values. */
	  var reIsUint = /^(?:0|[1-9]\d*)$/;

	  /** Used to match latin-1 supplementary letters (excluding mathematical operators). */
	  var reLatin1 = /[\xc0-\xd6\xd8-\xde\xdf-\xf6\xf8-\xff]/g;

	  /** Used to ensure capturing order of template delimiters. */
	  var reNoMatch = /($^)/;

	  /** Used to match unescaped characters in compiled string literals. */
	  var reUnescapedString = /['\n\r\u2028\u2029\\]/g;

	  /** Used to compose unicode character classes. */
	  var rsAstralRange = '\\ud800-\\udfff',
	      rsComboMarksRange = '\\u0300-\\u036f\\ufe20-\\ufe23',
	      rsComboSymbolsRange = '\\u20d0-\\u20f0',
	      rsDingbatRange = '\\u2700-\\u27bf',
	      rsLowerRange = 'a-z\\xdf-\\xf6\\xf8-\\xff',
	      rsMathOpRange = '\\xac\\xb1\\xd7\\xf7',
	      rsNonCharRange = '\\x00-\\x2f\\x3a-\\x40\\x5b-\\x60\\x7b-\\xbf',
	      rsQuoteRange = '\\u2018\\u2019\\u201c\\u201d',
	      rsSpaceRange = ' \\t\\x0b\\f\\xa0\\ufeff\\n\\r\\u2028\\u2029\\u1680\\u180e\\u2000\\u2001\\u2002\\u2003\\u2004\\u2005\\u2006\\u2007\\u2008\\u2009\\u200a\\u202f\\u205f\\u3000',
	      rsUpperRange = 'A-Z\\xc0-\\xd6\\xd8-\\xde',
	      rsVarRange = '\\ufe0e\\ufe0f',
	      rsBreakRange = rsMathOpRange + rsNonCharRange + rsQuoteRange + rsSpaceRange;

	  /** Used to compose unicode capture groups. */
	  var rsApos = "['\u2019]",
	      rsAstral = '[' + rsAstralRange + ']',
	      rsBreak = '[' + rsBreakRange + ']',
	      rsCombo = '[' + rsComboMarksRange + rsComboSymbolsRange + ']',
	      rsDigits = '\\d+',
	      rsDingbat = '[' + rsDingbatRange + ']',
	      rsLower = '[' + rsLowerRange + ']',
	      rsMisc = '[^' + rsAstralRange + rsBreakRange + rsDigits + rsDingbatRange + rsLowerRange + rsUpperRange + ']',
	      rsFitz = '\\ud83c[\\udffb-\\udfff]',
	      rsModifier = '(?:' + rsCombo + '|' + rsFitz + ')',
	      rsNonAstral = '[^' + rsAstralRange + ']',
	      rsRegional = '(?:\\ud83c[\\udde6-\\uddff]){2}',
	      rsSurrPair = '[\\ud800-\\udbff][\\udc00-\\udfff]',
	      rsUpper = '[' + rsUpperRange + ']',
	      rsZWJ = '\\u200d';

	  /** Used to compose unicode regexes. */
	  var rsLowerMisc = '(?:' + rsLower + '|' + rsMisc + ')',
	      rsUpperMisc = '(?:' + rsUpper + '|' + rsMisc + ')',
	      rsOptLowerContr = '(?:' + rsApos + '(?:d|ll|m|re|s|t|ve))?',
	      rsOptUpperContr = '(?:' + rsApos + '(?:D|LL|M|RE|S|T|VE))?',
	      reOptMod = rsModifier + '?',
	      rsOptVar = '[' + rsVarRange + ']?',
	      rsOptJoin = '(?:' + rsZWJ + '(?:' + [rsNonAstral, rsRegional, rsSurrPair].join('|') + ')' + rsOptVar + reOptMod + ')*',
	      rsSeq = rsOptVar + reOptMod + rsOptJoin,
	      rsEmoji = '(?:' + [rsDingbat, rsRegional, rsSurrPair].join('|') + ')' + rsSeq,
	      rsSymbol = '(?:' + [rsNonAstral + rsCombo + '?', rsCombo, rsRegional, rsSurrPair, rsAstral].join('|') + ')';

	  /** Used to match apostrophes. */
	  var reApos = RegExp(rsApos, 'g');

	  /**
	   * Used to match [combining diacritical marks](https://en.wikipedia.org/wiki/Combining_Diacritical_Marks) and
	   * [combining diacritical marks for symbols](https://en.wikipedia.org/wiki/Combining_Diacritical_Marks_for_Symbols).
	   */
	  var reComboMark = RegExp(rsCombo, 'g');

	  /** Used to match [string symbols](https://mathiasbynens.be/notes/javascript-unicode). */
	  var reComplexSymbol = RegExp(rsFitz + '(?=' + rsFitz + ')|' + rsSymbol + rsSeq, 'g');

	  /** Used to match complex or compound words. */
	  var reComplexWord = RegExp([
	    rsUpper + '?' + rsLower + '+' + rsOptLowerContr + '(?=' + [rsBreak, rsUpper, '$'].join('|') + ')',
	    rsUpperMisc + '+' + rsOptUpperContr + '(?=' + [rsBreak, rsUpper + rsLowerMisc, '$'].join('|') + ')',
	    rsUpper + '?' + rsLowerMisc + '+' + rsOptLowerContr,
	    rsUpper + '+' + rsOptUpperContr,
	    rsDigits,
	    rsEmoji
	  ].join('|'), 'g');

	  /** Used to detect strings with [zero-width joiners or code points from the astral planes](http://eev.ee/blog/2015/09/12/dark-corners-of-unicode/). */
	  var reHasComplexSymbol = RegExp('[' + rsZWJ + rsAstralRange  + rsComboMarksRange + rsComboSymbolsRange + rsVarRange + ']');

	  /** Used to detect strings that need a more robust regexp to match words. */
	  var reHasComplexWord = /[a-z][A-Z]|[A-Z]{2,}[a-z]|[0-9][a-zA-Z]|[a-zA-Z][0-9]|[^a-zA-Z0-9 ]/;

	  /** Used to assign default `context` object properties. */
	  var contextProps = [
	    'Array', 'Buffer', 'DataView', 'Date', 'Error', 'Float32Array', 'Float64Array',
	    'Function', 'Int8Array', 'Int16Array', 'Int32Array', 'Map', 'Math', 'Object',
	    'Promise', 'Reflect', 'RegExp', 'Set', 'String', 'Symbol', 'TypeError',
	    'Uint8Array', 'Uint8ClampedArray', 'Uint16Array', 'Uint32Array', 'WeakMap',
	    '_', 'clearTimeout', 'isFinite', 'parseInt', 'setTimeout'
	  ];

	  /** Used to make template sourceURLs easier to identify. */
	  var templateCounter = -1;

	  /** Used to identify `toStringTag` values of typed arrays. */
	  var typedArrayTags = {};
	  typedArrayTags[float32Tag] = typedArrayTags[float64Tag] =
	  typedArrayTags[int8Tag] = typedArrayTags[int16Tag] =
	  typedArrayTags[int32Tag] = typedArrayTags[uint8Tag] =
	  typedArrayTags[uint8ClampedTag] = typedArrayTags[uint16Tag] =
	  typedArrayTags[uint32Tag] = true;
	  typedArrayTags[argsTag] = typedArrayTags[arrayTag] =
	  typedArrayTags[arrayBufferTag] = typedArrayTags[boolTag] =
	  typedArrayTags[dataViewTag] = typedArrayTags[dateTag] =
	  typedArrayTags[errorTag] = typedArrayTags[funcTag] =
	  typedArrayTags[mapTag] = typedArrayTags[numberTag] =
	  typedArrayTags[objectTag] = typedArrayTags[regexpTag] =
	  typedArrayTags[setTag] = typedArrayTags[stringTag] =
	  typedArrayTags[weakMapTag] = false;

	  /** Used to identify `toStringTag` values supported by `_.clone`. */
	  var cloneableTags = {};
	  cloneableTags[argsTag] = cloneableTags[arrayTag] =
	  cloneableTags[arrayBufferTag] = cloneableTags[dataViewTag] =
	  cloneableTags[boolTag] = cloneableTags[dateTag] =
	  cloneableTags[float32Tag] = cloneableTags[float64Tag] =
	  cloneableTags[int8Tag] = cloneableTags[int16Tag] =
	  cloneableTags[int32Tag] = cloneableTags[mapTag] =
	  cloneableTags[numberTag] = cloneableTags[objectTag] =
	  cloneableTags[regexpTag] = cloneableTags[setTag] =
	  cloneableTags[stringTag] = cloneableTags[symbolTag] =
	  cloneableTags[uint8Tag] = cloneableTags[uint8ClampedTag] =
	  cloneableTags[uint16Tag] = cloneableTags[uint32Tag] = true;
	  cloneableTags[errorTag] = cloneableTags[funcTag] =
	  cloneableTags[weakMapTag] = false;

	  /** Used to map latin-1 supplementary letters to basic latin letters. */
	  var deburredLetters = {
	    '\xc0': 'A',  '\xc1': 'A', '\xc2': 'A', '\xc3': 'A', '\xc4': 'A', '\xc5': 'A',
	    '\xe0': 'a',  '\xe1': 'a', '\xe2': 'a', '\xe3': 'a', '\xe4': 'a', '\xe5': 'a',
	    '\xc7': 'C',  '\xe7': 'c',
	    '\xd0': 'D',  '\xf0': 'd',
	    '\xc8': 'E',  '\xc9': 'E', '\xca': 'E', '\xcb': 'E',
	    '\xe8': 'e',  '\xe9': 'e', '\xea': 'e', '\xeb': 'e',
	    '\xcC': 'I',  '\xcd': 'I', '\xce': 'I', '\xcf': 'I',
	    '\xeC': 'i',  '\xed': 'i', '\xee': 'i', '\xef': 'i',
	    '\xd1': 'N',  '\xf1': 'n',
	    '\xd2': 'O',  '\xd3': 'O', '\xd4': 'O', '\xd5': 'O', '\xd6': 'O', '\xd8': 'O',
	    '\xf2': 'o',  '\xf3': 'o', '\xf4': 'o', '\xf5': 'o', '\xf6': 'o', '\xf8': 'o',
	    '\xd9': 'U',  '\xda': 'U', '\xdb': 'U', '\xdc': 'U',
	    '\xf9': 'u',  '\xfa': 'u', '\xfb': 'u', '\xfc': 'u',
	    '\xdd': 'Y',  '\xfd': 'y', '\xff': 'y',
	    '\xc6': 'Ae', '\xe6': 'ae',
	    '\xde': 'Th', '\xfe': 'th',
	    '\xdf': 'ss'
	  };

	  /** Used to map characters to HTML entities. */
	  var htmlEscapes = {
	    '&': '&amp;',
	    '<': '&lt;',
	    '>': '&gt;',
	    '"': '&quot;',
	    "'": '&#39;',
	    '`': '&#96;'
	  };

	  /** Used to map HTML entities to characters. */
	  var htmlUnescapes = {
	    '&amp;': '&',
	    '&lt;': '<',
	    '&gt;': '>',
	    '&quot;': '"',
	    '&#39;': "'",
	    '&#96;': '`'
	  };

	  /** Used to determine if values are of the language type `Object`. */
	  var objectTypes = {
	    'function': true,
	    'object': true
	  };

	  /** Used to escape characters for inclusion in compiled string literals. */
	  var stringEscapes = {
	    '\\': '\\',
	    "'": "'",
	    '\n': 'n',
	    '\r': 'r',
	    '\u2028': 'u2028',
	    '\u2029': 'u2029'
	  };

	  /** Built-in method references without a dependency on `root`. */
	  var freeParseFloat = parseFloat,
	      freeParseInt = parseInt;

	  /** Detect free variable `exports`. */
	  var freeExports = (objectTypes[typeof exports] && exports && !exports.nodeType)
	    ? exports
	    : undefined;

	  /** Detect free variable `module`. */
	  var freeModule = (objectTypes[typeof module] && module && !module.nodeType)
	    ? module
	    : undefined;

	  /** Detect the popular CommonJS extension `module.exports`. */
	  var moduleExports = (freeModule && freeModule.exports === freeExports)
	    ? freeExports
	    : undefined;

	  /** Detect free variable `global` from Node.js. */
	  var freeGlobal = checkGlobal(freeExports && freeModule && typeof global == 'object' && global);

	  /** Detect free variable `self`. */
	  var freeSelf = checkGlobal(objectTypes[typeof self] && self);

	  /** Detect free variable `window`. */
	  var freeWindow = checkGlobal(objectTypes[typeof window] && window);

	  /** Detect `this` as the global object. */
	  var thisGlobal = checkGlobal(objectTypes[typeof this] && this);

	  /**
	   * Used as a reference to the global object.
	   *
	   * The `this` value is used if it's the global object to avoid Greasemonkey's
	   * restricted `window` object, otherwise the `window` object is used.
	   */
	  var root = freeGlobal ||
	    ((freeWindow !== (thisGlobal && thisGlobal.window)) && freeWindow) ||
	      freeSelf || thisGlobal || Function('return this')();

	  /*--------------------------------------------------------------------------*/

	  /**
	   * Adds the key-value `pair` to `map`.
	   *
	   * @private
	   * @param {Object} map The map to modify.
	   * @param {Array} pair The key-value pair to add.
	   * @returns {Object} Returns `map`.
	   */
	  function addMapEntry(map, pair) {
	    // Don't return `Map#set` because it doesn't return the map instance in IE 11.
	    map.set(pair[0], pair[1]);
	    return map;
	  }

	  /**
	   * Adds `value` to `set`.
	   *
	   * @private
	   * @param {Object} set The set to modify.
	   * @param {*} value The value to add.
	   * @returns {Object} Returns `set`.
	   */
	  function addSetEntry(set, value) {
	    set.add(value);
	    return set;
	  }

	  /**
	   * A faster alternative to `Function#apply`, this function invokes `func`
	   * with the `this` binding of `thisArg` and the arguments of `args`.
	   *
	   * @private
	   * @param {Function} func The function to invoke.
	   * @param {*} thisArg The `this` binding of `func`.
	   * @param {Array} args The arguments to invoke `func` with.
	   * @returns {*} Returns the result of `func`.
	   */
	  function apply(func, thisArg, args) {
	    var length = args.length;
	    switch (length) {
	      case 0: return func.call(thisArg);
	      case 1: return func.call(thisArg, args[0]);
	      case 2: return func.call(thisArg, args[0], args[1]);
	      case 3: return func.call(thisArg, args[0], args[1], args[2]);
	    }
	    return func.apply(thisArg, args);
	  }

	  /**
	   * A specialized version of `baseAggregator` for arrays.
	   *
	   * @private
	   * @param {Array} array The array to iterate over.
	   * @param {Function} setter The function to set `accumulator` values.
	   * @param {Function} iteratee The iteratee to transform keys.
	   * @param {Object} accumulator The initial aggregated object.
	   * @returns {Function} Returns `accumulator`.
	   */
	  function arrayAggregator(array, setter, iteratee, accumulator) {
	    var index = -1,
	        length = array.length;

	    while (++index < length) {
	      var value = array[index];
	      setter(accumulator, value, iteratee(value), array);
	    }
	    return accumulator;
	  }

	  /**
	   * Creates a new array concatenating `array` with `other`.
	   *
	   * @private
	   * @param {Array} array The first array to concatenate.
	   * @param {Array} other The second array to concatenate.
	   * @returns {Array} Returns the new concatenated array.
	   */
	  function arrayConcat(array, other) {
	    var index = -1,
	        length = array.length,
	        othIndex = -1,
	        othLength = other.length,
	        result = Array(length + othLength);

	    while (++index < length) {
	      result[index] = array[index];
	    }
	    while (++othIndex < othLength) {
	      result[index++] = other[othIndex];
	    }
	    return result;
	  }

	  /**
	   * A specialized version of `_.forEach` for arrays without support for
	   * iteratee shorthands.
	   *
	   * @private
	   * @param {Array} array The array to iterate over.
	   * @param {Function} iteratee The function invoked per iteration.
	   * @returns {Array} Returns `array`.
	   */
	  function arrayEach(array, iteratee) {
	    var index = -1,
	        length = array.length;

	    while (++index < length) {
	      if (iteratee(array[index], index, array) === false) {
	        break;
	      }
	    }
	    return array;
	  }

	  /**
	   * A specialized version of `_.forEachRight` for arrays without support for
	   * iteratee shorthands.
	   *
	   * @private
	   * @param {Array} array The array to iterate over.
	   * @param {Function} iteratee The function invoked per iteration.
	   * @returns {Array} Returns `array`.
	   */
	  function arrayEachRight(array, iteratee) {
	    var length = array.length;

	    while (length--) {
	      if (iteratee(array[length], length, array) === false) {
	        break;
	      }
	    }
	    return array;
	  }

	  /**
	   * A specialized version of `_.every` for arrays without support for
	   * iteratee shorthands.
	   *
	   * @private
	   * @param {Array} array The array to iterate over.
	   * @param {Function} predicate The function invoked per iteration.
	   * @returns {boolean} Returns `true` if all elements pass the predicate check,
	   *  else `false`.
	   */
	  function arrayEvery(array, predicate) {
	    var index = -1,
	        length = array.length;

	    while (++index < length) {
	      if (!predicate(array[index], index, array)) {
	        return false;
	      }
	    }
	    return true;
	  }

	  /**
	   * A specialized version of `_.filter` for arrays without support for
	   * iteratee shorthands.
	   *
	   * @private
	   * @param {Array} array The array to iterate over.
	   * @param {Function} predicate The function invoked per iteration.
	   * @returns {Array} Returns the new filtered array.
	   */
	  function arrayFilter(array, predicate) {
	    var index = -1,
	        length = array.length,
	        resIndex = 0,
	        result = [];

	    while (++index < length) {
	      var value = array[index];
	      if (predicate(value, index, array)) {
	        result[resIndex++] = value;
	      }
	    }
	    return result;
	  }

	  /**
	   * A specialized version of `_.includes` for arrays without support for
	   * specifying an index to search from.
	   *
	   * @private
	   * @param {Array} array The array to search.
	   * @param {*} target The value to search for.
	   * @returns {boolean} Returns `true` if `target` is found, else `false`.
	   */
	  function arrayIncludes(array, value) {
	    return !!array.length && baseIndexOf(array, value, 0) > -1;
	  }

	  /**
	   * This function is like `arrayIncludes` except that it accepts a comparator.
	   *
	   * @private
	   * @param {Array} array The array to search.
	   * @param {*} target The value to search for.
	   * @param {Function} comparator The comparator invoked per element.
	   * @returns {boolean} Returns `true` if `target` is found, else `false`.
	   */
	  function arrayIncludesWith(array, value, comparator) {
	    var index = -1,
	        length = array.length;

	    while (++index < length) {
	      if (comparator(value, array[index])) {
	        return true;
	      }
	    }
	    return false;
	  }

	  /**
	   * A specialized version of `_.map` for arrays without support for iteratee
	   * shorthands.
	   *
	   * @private
	   * @param {Array} array The array to iterate over.
	   * @param {Function} iteratee The function invoked per iteration.
	   * @returns {Array} Returns the new mapped array.
	   */
	  function arrayMap(array, iteratee) {
	    var index = -1,
	        length = array.length,
	        result = Array(length);

	    while (++index < length) {
	      result[index] = iteratee(array[index], index, array);
	    }
	    return result;
	  }

	  /**
	   * Appends the elements of `values` to `array`.
	   *
	   * @private
	   * @param {Array} array The array to modify.
	   * @param {Array} values The values to append.
	   * @returns {Array} Returns `array`.
	   */
	  function arrayPush(array, values) {
	    var index = -1,
	        length = values.length,
	        offset = array.length;

	    while (++index < length) {
	      array[offset + index] = values[index];
	    }
	    return array;
	  }

	  /**
	   * A specialized version of `_.reduce` for arrays without support for
	   * iteratee shorthands.
	   *
	   * @private
	   * @param {Array} array The array to iterate over.
	   * @param {Function} iteratee The function invoked per iteration.
	   * @param {*} [accumulator] The initial value.
	   * @param {boolean} [initAccum] Specify using the first element of `array` as
	   *  the initial value.
	   * @returns {*} Returns the accumulated value.
	   */
	  function arrayReduce(array, iteratee, accumulator, initAccum) {
	    var index = -1,
	        length = array.length;

	    if (initAccum && length) {
	      accumulator = array[++index];
	    }
	    while (++index < length) {
	      accumulator = iteratee(accumulator, array[index], index, array);
	    }
	    return accumulator;
	  }

	  /**
	   * A specialized version of `_.reduceRight` for arrays without support for
	   * iteratee shorthands.
	   *
	   * @private
	   * @param {Array} array The array to iterate over.
	   * @param {Function} iteratee The function invoked per iteration.
	   * @param {*} [accumulator] The initial value.
	   * @param {boolean} [initAccum] Specify using the last element of `array` as
	   *  the initial value.
	   * @returns {*} Returns the accumulated value.
	   */
	  function arrayReduceRight(array, iteratee, accumulator, initAccum) {
	    var length = array.length;
	    if (initAccum && length) {
	      accumulator = array[--length];
	    }
	    while (length--) {
	      accumulator = iteratee(accumulator, array[length], length, array);
	    }
	    return accumulator;
	  }

	  /**
	   * A specialized version of `_.some` for arrays without support for iteratee
	   * shorthands.
	   *
	   * @private
	   * @param {Array} array The array to iterate over.
	   * @param {Function} predicate The function invoked per iteration.
	   * @returns {boolean} Returns `true` if any element passes the predicate check,
	   *  else `false`.
	   */
	  function arraySome(array, predicate) {
	    var index = -1,
	        length = array.length;

	    while (++index < length) {
	      if (predicate(array[index], index, array)) {
	        return true;
	      }
	    }
	    return false;
	  }

	  /**
	   * The base implementation of methods like `_.max` and `_.min` which accepts a
	   * `comparator` to determine the extremum value.
	   *
	   * @private
	   * @param {Array} array The array to iterate over.
	   * @param {Function} iteratee The iteratee invoked per iteration.
	   * @param {Function} comparator The comparator used to compare values.
	   * @returns {*} Returns the extremum value.
	   */
	  function baseExtremum(array, iteratee, comparator) {
	    var index = -1,
	        length = array.length;

	    while (++index < length) {
	      var value = array[index],
	          current = iteratee(value);

	      if (current != null && (computed === undefined
	            ? current === current
	            : comparator(current, computed)
	          )) {
	        var computed = current,
	            result = value;
	      }
	    }
	    return result;
	  }

	  /**
	   * The base implementation of methods like `_.find` and `_.findKey`, without
	   * support for iteratee shorthands, which iterates over `collection` using
	   * `eachFunc`.
	   *
	   * @private
	   * @param {Array|Object} collection The collection to search.
	   * @param {Function} predicate The function invoked per iteration.
	   * @param {Function} eachFunc The function to iterate over `collection`.
	   * @param {boolean} [retKey] Specify returning the key of the found element
	   *  instead of the element itself.
	   * @returns {*} Returns the found element or its key, else `undefined`.
	   */
	  function baseFind(collection, predicate, eachFunc, retKey) {
	    var result;
	    eachFunc(collection, function(value, key, collection) {
	      if (predicate(value, key, collection)) {
	        result = retKey ? key : value;
	        return false;
	      }
	    });
	    return result;
	  }

	  /**
	   * The base implementation of `_.findIndex` and `_.findLastIndex` without
	   * support for iteratee shorthands.
	   *
	   * @private
	   * @param {Array} array The array to search.
	   * @param {Function} predicate The function invoked per iteration.
	   * @param {boolean} [fromRight] Specify iterating from right to left.
	   * @returns {number} Returns the index of the matched value, else `-1`.
	   */
	  function baseFindIndex(array, predicate, fromRight) {
	    var length = array.length,
	        index = fromRight ? length : -1;

	    while ((fromRight ? index-- : ++index < length)) {
	      if (predicate(array[index], index, array)) {
	        return index;
	      }
	    }
	    return -1;
	  }

	  /**
	   * The base implementation of `_.indexOf` without `fromIndex` bounds checks.
	   *
	   * @private
	   * @param {Array} array The array to search.
	   * @param {*} value The value to search for.
	   * @param {number} fromIndex The index to search from.
	   * @returns {number} Returns the index of the matched value, else `-1`.
	   */
	  function baseIndexOf(array, value, fromIndex) {
	    if (value !== value) {
	      return indexOfNaN(array, fromIndex);
	    }
	    var index = fromIndex - 1,
	        length = array.length;

	    while (++index < length) {
	      if (array[index] === value) {
	        return index;
	      }
	    }
	    return -1;
	  }

	  /**
	   * This function is like `baseIndexOf` except that it accepts a comparator.
	   *
	   * @private
	   * @param {Array} array The array to search.
	   * @param {*} value The value to search for.
	   * @param {number} fromIndex The index to search from.
	   * @param {Function} comparator The comparator invoked per element.
	   * @returns {number} Returns the index of the matched value, else `-1`.
	   */
	  function baseIndexOfWith(array, value, fromIndex, comparator) {
	    var index = fromIndex - 1,
	        length = array.length;

	    while (++index < length) {
	      if (comparator(array[index], value)) {
	        return index;
	      }
	    }
	    return -1;
	  }

	  /**
	   * The base implementation of `_.mean` and `_.meanBy` without support for
	   * iteratee shorthands.
	   *
	   * @private
	   * @param {Array} array The array to iterate over.
	   * @param {Function} iteratee The function invoked per iteration.
	   * @returns {number} Returns the mean.
	   */
	  function baseMean(array, iteratee) {
	    var length = array ? array.length : 0;
	    return length ? (baseSum(array, iteratee) / length) : NAN;
	  }

	  /**
	   * The base implementation of `_.reduce` and `_.reduceRight`, without support
	   * for iteratee shorthands, which iterates over `collection` using `eachFunc`.
	   *
	   * @private
	   * @param {Array|Object} collection The collection to iterate over.
	   * @param {Function} iteratee The function invoked per iteration.
	   * @param {*} accumulator The initial value.
	   * @param {boolean} initAccum Specify using the first or last element of
	   *  `collection` as the initial value.
	   * @param {Function} eachFunc The function to iterate over `collection`.
	   * @returns {*} Returns the accumulated value.
	   */
	  function baseReduce(collection, iteratee, accumulator, initAccum, eachFunc) {
	    eachFunc(collection, function(value, index, collection) {
	      accumulator = initAccum
	        ? (initAccum = false, value)
	        : iteratee(accumulator, value, index, collection);
	    });
	    return accumulator;
	  }

	  /**
	   * The base implementation of `_.sortBy` which uses `comparer` to define the
	   * sort order of `array` and replaces criteria objects with their corresponding
	   * values.
	   *
	   * @private
	   * @param {Array} array The array to sort.
	   * @param {Function} comparer The function to define sort order.
	   * @returns {Array} Returns `array`.
	   */
	  function baseSortBy(array, comparer) {
	    var length = array.length;

	    array.sort(comparer);
	    while (length--) {
	      array[length] = array[length].value;
	    }
	    return array;
	  }

	  /**
	   * The base implementation of `_.sum` and `_.sumBy` without support for
	   * iteratee shorthands.
	   *
	   * @private
	   * @param {Array} array The array to iterate over.
	   * @param {Function} iteratee The function invoked per iteration.
	   * @returns {number} Returns the sum.
	   */
	  function baseSum(array, iteratee) {
	    var result,
	        index = -1,
	        length = array.length;

	    while (++index < length) {
	      var current = iteratee(array[index]);
	      if (current !== undefined) {
	        result = result === undefined ? current : (result + current);
	      }
	    }
	    return result;
	  }

	  /**
	   * The base implementation of `_.times` without support for iteratee shorthands
	   * or max array length checks.
	   *
	   * @private
	   * @param {number} n The number of times to invoke `iteratee`.
	   * @param {Function} iteratee The function invoked per iteration.
	   * @returns {Array} Returns the array of results.
	   */
	  function baseTimes(n, iteratee) {
	    var index = -1,
	        result = Array(n);

	    while (++index < n) {
	      result[index] = iteratee(index);
	    }
	    return result;
	  }

	  /**
	   * The base implementation of `_.toPairs` and `_.toPairsIn` which creates an array
	   * of key-value pairs for `object` corresponding to the property names of `props`.
	   *
	   * @private
	   * @param {Object} object The object to query.
	   * @param {Array} props The property names to get values for.
	   * @returns {Object} Returns the new array of key-value pairs.
	   */
	  function baseToPairs(object, props) {
	    return arrayMap(props, function(key) {
	      return [key, object[key]];
	    });
	  }

	  /**
	   * The base implementation of `_.unary` without support for storing wrapper metadata.
	   *
	   * @private
	   * @param {Function} func The function to cap arguments for.
	   * @returns {Function} Returns the new function.
	   */
	  function baseUnary(func) {
	    return function(value) {
	      return func(value);
	    };
	  }

	  /**
	   * The base implementation of `_.values` and `_.valuesIn` which creates an
	   * array of `object` property values corresponding to the property names
	   * of `props`.
	   *
	   * @private
	   * @param {Object} object The object to query.
	   * @param {Array} props The property names to get values for.
	   * @returns {Object} Returns the array of property values.
	   */
	  function baseValues(object, props) {
	    return arrayMap(props, function(key) {
	      return object[key];
	    });
	  }

	  /**
	   * Used by `_.trim` and `_.trimStart` to get the index of the first string symbol
	   * that is not found in the character symbols.
	   *
	   * @private
	   * @param {Array} strSymbols The string symbols to inspect.
	   * @param {Array} chrSymbols The character symbols to find.
	   * @returns {number} Returns the index of the first unmatched string symbol.
	   */
	  function charsStartIndex(strSymbols, chrSymbols) {
	    var index = -1,
	        length = strSymbols.length;

	    while (++index < length && baseIndexOf(chrSymbols, strSymbols[index], 0) > -1) {}
	    return index;
	  }

	  /**
	   * Used by `_.trim` and `_.trimEnd` to get the index of the last string symbol
	   * that is not found in the character symbols.
	   *
	   * @private
	   * @param {Array} strSymbols The string symbols to inspect.
	   * @param {Array} chrSymbols The character symbols to find.
	   * @returns {number} Returns the index of the last unmatched string symbol.
	   */
	  function charsEndIndex(strSymbols, chrSymbols) {
	    var index = strSymbols.length;

	    while (index-- && baseIndexOf(chrSymbols, strSymbols[index], 0) > -1) {}
	    return index;
	  }

	  /**
	   * Checks if `value` is a global object.
	   *
	   * @private
	   * @param {*} value The value to check.
	   * @returns {null|Object} Returns `value` if it's a global object, else `null`.
	   */
	  function checkGlobal(value) {
	    return (value && value.Object === Object) ? value : null;
	  }

	  /**
	   * Compares values to sort them in ascending order.
	   *
	   * @private
	   * @param {*} value The value to compare.
	   * @param {*} other The other value to compare.
	   * @returns {number} Returns the sort order indicator for `value`.
	   */
	  function compareAscending(value, other) {
	    if (value !== other) {
	      var valIsNull = value === null,
	          valIsUndef = value === undefined,
	          valIsReflexive = value === value;

	      var othIsNull = other === null,
	          othIsUndef = other === undefined,
	          othIsReflexive = other === other;

	      if ((value > other && !othIsNull) || !valIsReflexive ||
	          (valIsNull && !othIsUndef && othIsReflexive) ||
	          (valIsUndef && othIsReflexive)) {
	        return 1;
	      }
	      if ((value < other && !valIsNull) || !othIsReflexive ||
	          (othIsNull && !valIsUndef && valIsReflexive) ||
	          (othIsUndef && valIsReflexive)) {
	        return -1;
	      }
	    }
	    return 0;
	  }

	  /**
	   * Used by `_.orderBy` to compare multiple properties of a value to another
	   * and stable sort them.
	   *
	   * If `orders` is unspecified, all values are sorted in ascending order. Otherwise,
	   * specify an order of "desc" for descending or "asc" for ascending sort order
	   * of corresponding values.
	   *
	   * @private
	   * @param {Object} object The object to compare.
	   * @param {Object} other The other object to compare.
	   * @param {boolean[]|string[]} orders The order to sort by for each property.
	   * @returns {number} Returns the sort order indicator for `object`.
	   */
	  function compareMultiple(object, other, orders) {
	    var index = -1,
	        objCriteria = object.criteria,
	        othCriteria = other.criteria,
	        length = objCriteria.length,
	        ordersLength = orders.length;

	    while (++index < length) {
	      var result = compareAscending(objCriteria[index], othCriteria[index]);
	      if (result) {
	        if (index >= ordersLength) {
	          return result;
	        }
	        var order = orders[index];
	        return result * (order == 'desc' ? -1 : 1);
	      }
	    }
	    // Fixes an `Array#sort` bug in the JS engine embedded in Adobe applications
	    // that causes it, under certain circumstances, to provide the same value for
	    // `object` and `other`. See https://github.com/jashkenas/underscore/pull/1247
	    // for more details.
	    //
	    // This also ensures a stable sort in V8 and other engines.
	    // See https://bugs.chromium.org/p/v8/issues/detail?id=90 for more details.
	    return object.index - other.index;
	  }

	  /**
	   * Gets the number of `placeholder` occurrences in `array`.
	   *
	   * @private
	   * @param {Array} array The array to inspect.
	   * @param {*} placeholder The placeholder to search for.
	   * @returns {number} Returns the placeholder count.
	   */
	  function countHolders(array, placeholder) {
	    var length = array.length,
	        result = 0;

	    while (length--) {
	      if (array[length] === placeholder) {
	        result++;
	      }
	    }
	    return result;
	  }

	  /**
	   * Creates a function that performs a mathematical operation on two values.
	   *
	   * @private
	   * @param {Function} operator The function to perform the operation.
	   * @returns {Function} Returns the new mathematical operation function.
	   */
	  function createMathOperation(operator) {
	    return function(value, other) {
	      var result;
	      if (value === undefined && other === undefined) {
	        return 0;
	      }
	      if (value !== undefined) {
	        result = value;
	      }
	      if (other !== undefined) {
	        result = result === undefined ? other : operator(result, other);
	      }
	      return result;
	    };
	  }

	  /**
	   * Used by `_.deburr` to convert latin-1 supplementary letters to basic latin letters.
	   *
	   * @private
	   * @param {string} letter The matched letter to deburr.
	   * @returns {string} Returns the deburred letter.
	   */
	  function deburrLetter(letter) {
	    return deburredLetters[letter];
	  }

	  /**
	   * Used by `_.escape` to convert characters to HTML entities.
	   *
	   * @private
	   * @param {string} chr The matched character to escape.
	   * @returns {string} Returns the escaped character.
	   */
	  function escapeHtmlChar(chr) {
	    return htmlEscapes[chr];
	  }

	  /**
	   * Used by `_.template` to escape characters for inclusion in compiled string literals.
	   *
	   * @private
	   * @param {string} chr The matched character to escape.
	   * @returns {string} Returns the escaped character.
	   */
	  function escapeStringChar(chr) {
	    return '\\' + stringEscapes[chr];
	  }

	  /**
	   * Gets the index at which the first occurrence of `NaN` is found in `array`.
	   *
	   * @private
	   * @param {Array} array The array to search.
	   * @param {number} fromIndex The index to search from.
	   * @param {boolean} [fromRight] Specify iterating from right to left.
	   * @returns {number} Returns the index of the matched `NaN`, else `-1`.
	   */
	  function indexOfNaN(array, fromIndex, fromRight) {
	    var length = array.length,
	        index = fromIndex + (fromRight ? 0 : -1);

	    while ((fromRight ? index-- : ++index < length)) {
	      var other = array[index];
	      if (other !== other) {
	        return index;
	      }
	    }
	    return -1;
	  }

	  /**
	   * Checks if `value` is a host object in IE < 9.
	   *
	   * @private
	   * @param {*} value The value to check.
	   * @returns {boolean} Returns `true` if `value` is a host object, else `false`.
	   */
	  function isHostObject(value) {
	    // Many host objects are `Object` objects that can coerce to strings
	    // despite having improperly defined `toString` methods.
	    var result = false;
	    if (value != null && typeof value.toString != 'function') {
	      try {
	        result = !!(value + '');
	      } catch (e) {}
	    }
	    return result;
	  }

	  /**
	   * Checks if `value` is a valid array-like index.
	   *
	   * @private
	   * @param {*} value The value to check.
	   * @param {number} [length=MAX_SAFE_INTEGER] The upper bounds of a valid index.
	   * @returns {boolean} Returns `true` if `value` is a valid index, else `false`.
	   */
	  function isIndex(value, length) {
	    value = (typeof value == 'number' || reIsUint.test(value)) ? +value : -1;
	    length = length == null ? MAX_SAFE_INTEGER : length;
	    return value > -1 && value % 1 == 0 && value < length;
	  }

	  /**
	   * Converts `iterator` to an array.
	   *
	   * @private
	   * @param {Object} iterator The iterator to convert.
	   * @returns {Array} Returns the converted array.
	   */
	  function iteratorToArray(iterator) {
	    var data,
	        result = [];

	    while (!(data = iterator.next()).done) {
	      result.push(data.value);
	    }
	    return result;
	  }

	  /**
	   * Converts `map` to an array.
	   *
	   * @private
	   * @param {Object} map The map to convert.
	   * @returns {Array} Returns the converted array.
	   */
	  function mapToArray(map) {
	    var index = -1,
	        result = Array(map.size);

	    map.forEach(function(value, key) {
	      result[++index] = [key, value];
	    });
	    return result;
	  }

	  /**
	   * Replaces all `placeholder` elements in `array` with an internal placeholder
	   * and returns an array of their indexes.
	   *
	   * @private
	   * @param {Array} array The array to modify.
	   * @param {*} placeholder The placeholder to replace.
	   * @returns {Array} Returns the new array of placeholder indexes.
	   */
	  function replaceHolders(array, placeholder) {
	    var index = -1,
	        length = array.length,
	        resIndex = 0,
	        result = [];

	    while (++index < length) {
	      var value = array[index];
	      if (value === placeholder || value === PLACEHOLDER) {
	        array[index] = PLACEHOLDER;
	        result[resIndex++] = index;
	      }
	    }
	    return result;
	  }

	  /**
	   * Converts `set` to an array.
	   *
	   * @private
	   * @param {Object} set The set to convert.
	   * @returns {Array} Returns the converted array.
	   */
	  function setToArray(set) {
	    var index = -1,
	        result = Array(set.size);

	    set.forEach(function(value) {
	      result[++index] = value;
	    });
	    return result;
	  }

	  /**
	   * Gets the number of symbols in `string`.
	   *
	   * @private
	   * @param {string} string The string to inspect.
	   * @returns {number} Returns the string size.
	   */
	  function stringSize(string) {
	    if (!(string && reHasComplexSymbol.test(string))) {
	      return string.length;
	    }
	    var result = reComplexSymbol.lastIndex = 0;
	    while (reComplexSymbol.test(string)) {
	      result++;
	    }
	    return result;
	  }

	  /**
	   * Converts `string` to an array.
	   *
	   * @private
	   * @param {string} string The string to convert.
	   * @returns {Array} Returns the converted array.
	   */
	  function stringToArray(string) {
	    return string.match(reComplexSymbol);
	  }

	  /**
	   * Used by `_.unescape` to convert HTML entities to characters.
	   *
	   * @private
	   * @param {string} chr The matched character to unescape.
	   * @returns {string} Returns the unescaped character.
	   */
	  function unescapeHtmlChar(chr) {
	    return htmlUnescapes[chr];
	  }

	  /*--------------------------------------------------------------------------*/

	  /**
	   * Create a new pristine `lodash` function using the `context` object.
	   *
	   * @static
	   * @memberOf _
	   * @since 1.1.0
	   * @category Util
	   * @param {Object} [context=root] The context object.
	   * @returns {Function} Returns a new `lodash` function.
	   * @example
	   *
	   * _.mixin({ 'foo': _.constant('foo') });
	   *
	   * var lodash = _.runInContext();
	   * lodash.mixin({ 'bar': lodash.constant('bar') });
	   *
	   * _.isFunction(_.foo);
	   * // => true
	   * _.isFunction(_.bar);
	   * // => false
	   *
	   * lodash.isFunction(lodash.foo);
	   * // => false
	   * lodash.isFunction(lodash.bar);
	   * // => true
	   *
	   * // Use `context` to mock `Date#getTime` use in `_.now`.
	   * var mock = _.runInContext({
	   *   'Date': function() {
	   *     return { 'getTime': getTimeMock };
	   *   }
	   * });
	   *
	   * // Create a suped-up `defer` in Node.js.
	   * var defer = _.runInContext({ 'setTimeout': setImmediate }).defer;
	   */
	  function runInContext(context) {
	    context = context ? _.defaults({}, context, _.pick(root, contextProps)) : root;

	    /** Built-in constructor references. */
	    var Date = context.Date,
	        Error = context.Error,
	        Math = context.Math,
	        RegExp = context.RegExp,
	        TypeError = context.TypeError;

	    /** Used for built-in method references. */
	    var arrayProto = context.Array.prototype,
	        objectProto = context.Object.prototype,
	        stringProto = context.String.prototype;

	    /** Used to resolve the decompiled source of functions. */
	    var funcToString = context.Function.prototype.toString;

	    /** Used to check objects for own properties. */
	    var hasOwnProperty = objectProto.hasOwnProperty;

	    /** Used to generate unique IDs. */
	    var idCounter = 0;

	    /** Used to infer the `Object` constructor. */
	    var objectCtorString = funcToString.call(Object);

	    /**
	     * Used to resolve the
	     * [`toStringTag`](http://ecma-international.org/ecma-262/6.0/#sec-object.prototype.tostring)
	     * of values.
	     */
	    var objectToString = objectProto.toString;

	    /** Used to restore the original `_` reference in `_.noConflict`. */
	    var oldDash = root._;

	    /** Used to detect if a method is native. */
	    var reIsNative = RegExp('^' +
	      funcToString.call(hasOwnProperty).replace(reRegExpChar, '\\$&')
	      .replace(/hasOwnProperty|(function).*?(?=\\\()| for .+?(?=\\\])/g, '$1.*?') + '$'
	    );

	    /** Built-in value references. */
	    var Buffer = moduleExports ? context.Buffer : undefined,
	        Reflect = context.Reflect,
	        Symbol = context.Symbol,
	        Uint8Array = context.Uint8Array,
	        clearTimeout = context.clearTimeout,
	        enumerate = Reflect ? Reflect.enumerate : undefined,
	        getOwnPropertySymbols = Object.getOwnPropertySymbols,
	        iteratorSymbol = typeof (iteratorSymbol = Symbol && Symbol.iterator) == 'symbol' ? iteratorSymbol : undefined,
	        objectCreate = Object.create,
	        propertyIsEnumerable = objectProto.propertyIsEnumerable,
	        setTimeout = context.setTimeout,
	        splice = arrayProto.splice;

	    /* Built-in method references for those with the same name as other `lodash` methods. */
	    var nativeCeil = Math.ceil,
	        nativeFloor = Math.floor,
	        nativeGetPrototype = Object.getPrototypeOf,
	        nativeIsFinite = context.isFinite,
	        nativeJoin = arrayProto.join,
	        nativeKeys = Object.keys,
	        nativeMax = Math.max,
	        nativeMin = Math.min,
	        nativeParseInt = context.parseInt,
	        nativeRandom = Math.random,
	        nativeReplace = stringProto.replace,
	        nativeReverse = arrayProto.reverse,
	        nativeSplit = stringProto.split;

	    /* Built-in method references that are verified to be native. */
	    var DataView = getNative(context, 'DataView'),
	        Map = getNative(context, 'Map'),
	        Promise = getNative(context, 'Promise'),
	        Set = getNative(context, 'Set'),
	        WeakMap = getNative(context, 'WeakMap'),
	        nativeCreate = getNative(Object, 'create');

	    /** Used to store function metadata. */
	    var metaMap = WeakMap && new WeakMap;

	    /** Detect if properties shadowing those on `Object.prototype` are non-enumerable. */
	    var nonEnumShadows = !propertyIsEnumerable.call({ 'valueOf': 1 }, 'valueOf');

	    /** Used to lookup unminified function names. */
	    var realNames = {};

	    /** Used to detect maps, sets, and weakmaps. */
	    var dataViewCtorString = toSource(DataView),
	        mapCtorString = toSource(Map),
	        promiseCtorString = toSource(Promise),
	        setCtorString = toSource(Set),
	        weakMapCtorString = toSource(WeakMap);

	    /** Used to convert symbols to primitives and strings. */
	    var symbolProto = Symbol ? Symbol.prototype : undefined,
	        symbolValueOf = symbolProto ? symbolProto.valueOf : undefined,
	        symbolToString = symbolProto ? symbolProto.toString : undefined;

	    /*------------------------------------------------------------------------*/

	    /**
	     * Creates a `lodash` object which wraps `value` to enable implicit method
	     * chain sequences. Methods that operate on and return arrays, collections,
	     * and functions can be chained together. Methods that retrieve a single value
	     * or may return a primitive value will automatically end the chain sequence
	     * and return the unwrapped value. Otherwise, the value must be unwrapped
	     * with `_#value`.
	     *
	     * Explicit chain sequences, which must be unwrapped with `_#value`, may be
	     * enabled using `_.chain`.
	     *
	     * The execution of chained methods is lazy, that is, it's deferred until
	     * `_#value` is implicitly or explicitly called.
	     *
	     * Lazy evaluation allows several methods to support shortcut fusion.
	     * Shortcut fusion is an optimization to merge iteratee calls; this avoids
	     * the creation of intermediate arrays and can greatly reduce the number of
	     * iteratee executions. Sections of a chain sequence qualify for shortcut
	     * fusion if the section is applied to an array of at least `200` elements
	     * and any iteratees accept only one argument. The heuristic for whether a
	     * section qualifies for shortcut fusion is subject to change.
	     *
	     * Chaining is supported in custom builds as long as the `_#value` method is
	     * directly or indirectly included in the build.
	     *
	     * In addition to lodash methods, wrappers have `Array` and `String` methods.
	     *
	     * The wrapper `Array` methods are:
	     * `concat`, `join`, `pop`, `push`, `shift`, `sort`, `splice`, and `unshift`
	     *
	     * The wrapper `String` methods are:
	     * `replace` and `split`
	     *
	     * The wrapper methods that support shortcut fusion are:
	     * `at`, `compact`, `drop`, `dropRight`, `dropWhile`, `filter`, `find`,
	     * `findLast`, `head`, `initial`, `last`, `map`, `reject`, `reverse`, `slice`,
	     * `tail`, `take`, `takeRight`, `takeRightWhile`, `takeWhile`, and `toArray`
	     *
	     * The chainable wrapper methods are:
	     * `after`, `ary`, `assign`, `assignIn`, `assignInWith`, `assignWith`, `at`,
	     * `before`, `bind`, `bindAll`, `bindKey`, `castArray`, `chain`, `chunk`,
	     * `commit`, `compact`, `concat`, `conforms`, `constant`, `countBy`, `create`,
	     * `curry`, `debounce`, `defaults`, `defaultsDeep`, `defer`, `delay`,
	     * `difference`, `differenceBy`, `differenceWith`, `drop`, `dropRight`,
	     * `dropRightWhile`, `dropWhile`, `extend`, `extendWith`, `fill`, `filter`,
	     * `flatMap`, `flatMapDeep`, `flatMapDepth`, `flatten`, `flattenDeep`,
	     * `flattenDepth`, `flip`, `flow`, `flowRight`, `fromPairs`, `functions`,
	     * `functionsIn`, `groupBy`, `initial`, `intersection`, `intersectionBy`,
	     * `intersectionWith`, `invert`, `invertBy`, `invokeMap`, `iteratee`, `keyBy`,
	     * `keys`, `keysIn`, `map`, `mapKeys`, `mapValues`, `matches`, `matchesProperty`,
	     * `memoize`, `merge`, `mergeWith`, `method`, `methodOf`, `mixin`, `negate`,
	     * `nthArg`, `omit`, `omitBy`, `once`, `orderBy`, `over`, `overArgs`,
	     * `overEvery`, `overSome`, `partial`, `partialRight`, `partition`, `pick`,
	     * `pickBy`, `plant`, `property`, `propertyOf`, `pull`, `pullAll`, `pullAllBy`,
	     * `pullAllWith`, `pullAt`, `push`, `range`, `rangeRight`, `rearg`, `reject`,
	     * `remove`, `rest`, `reverse`, `sampleSize`, `set`, `setWith`, `shuffle`,
	     * `slice`, `sort`, `sortBy`, `splice`, `spread`, `tail`, `take`, `takeRight`,
	     * `takeRightWhile`, `takeWhile`, `tap`, `throttle`, `thru`, `toArray`,
	     * `toPairs`, `toPairsIn`, `toPath`, `toPlainObject`, `transform`, `unary`,
	     * `union`, `unionBy`, `unionWith`, `uniq`, `uniqBy`, `uniqWith`, `unset`,
	     * `unshift`, `unzip`, `unzipWith`, `update`, `updateWith`, `values`,
	     * `valuesIn`, `without`, `wrap`, `xor`, `xorBy`, `xorWith`, `zip`,
	     * `zipObject`, `zipObjectDeep`, and `zipWith`
	     *
	     * The wrapper methods that are **not** chainable by default are:
	     * `add`, `attempt`, `camelCase`, `capitalize`, `ceil`, `clamp`, `clone`,
	     * `cloneDeep`, `cloneDeepWith`, `cloneWith`, `deburr`, `divide`, `each`,
	     * `eachRight`, `endsWith`, `eq`, `escape`, `escapeRegExp`, `every`, `find`,
	     * `findIndex`, `findKey`, `findLast`, `findLastIndex`, `findLastKey`, `first`,
	     * `floor`, `forEach`, `forEachRight`, `forIn`, `forInRight`, `forOwn`,
	     * `forOwnRight`, `get`, `gt`, `gte`, `has`, `hasIn`, `head`, `identity`,
	     * `includes`, `indexOf`, `inRange`, `invoke`, `isArguments`, `isArray`,
	     * `isArrayBuffer`, `isArrayLike`, `isArrayLikeObject`, `isBoolean`, `isBuffer`,
	     * `isDate`, `isElement`, `isEmpty`, `isEqual`, `isEqualWith`, `isError`,
	     * `isFinite`, `isFunction`, `isInteger`, `isLength`, `isMap`, `isMatch`,
	     * `isMatchWith`, `isNaN`, `isNative`, `isNil`, `isNull`, `isNumber`,
	     * `isObject`, `isObjectLike`, `isPlainObject`, `isRegExp`, `isSafeInteger`,
	     * `isSet`, `isString`, `isUndefined`, `isTypedArray`, `isWeakMap`, `isWeakSet`,
	     * `join`, `kebabCase`, `last`, `lastIndexOf`, `lowerCase`, `lowerFirst`,
	     * `lt`, `lte`, `max`, `maxBy`, `mean`, `meanBy`, `min`, `minBy`, `multiply`,
	     * `noConflict`, `noop`, `now`, `nth`, `pad`, `padEnd`, `padStart`, `parseInt`,
	     * `pop`, `random`, `reduce`, `reduceRight`, `repeat`, `result`, `round`,
	     * `runInContext`, `sample`, `shift`, `size`, `snakeCase`, `some`, `sortedIndex`,
	     * `sortedIndexBy`, `sortedLastIndex`, `sortedLastIndexBy`, `startCase`,
	     * `startsWith`, `subtract`, `sum`, `sumBy`, `template`, `times`, `toInteger`,
	     * `toJSON`, `toLength`, `toLower`, `toNumber`, `toSafeInteger`, `toString`,
	     * `toUpper`, `trim`, `trimEnd`, `trimStart`, `truncate`, `unescape`,
	     * `uniqueId`, `upperCase`, `upperFirst`, `value`, and `words`
	     *
	     * @name _
	     * @constructor
	     * @category Seq
	     * @param {*} value The value to wrap in a `lodash` instance.
	     * @returns {Object} Returns the new `lodash` wrapper instance.
	     * @example
	     *
	     * function square(n) {
	     *   return n * n;
	     * }
	     *
	     * var wrapped = _([1, 2, 3]);
	     *
	     * // Returns an unwrapped value.
	     * wrapped.reduce(_.add);
	     * // => 6
	     *
	     * // Returns a wrapped value.
	     * var squares = wrapped.map(square);
	     *
	     * _.isArray(squares);
	     * // => false
	     *
	     * _.isArray(squares.value());
	     * // => true
	     */
	    function lodash(value) {
	      if (isObjectLike(value) && !isArray(value) && !(value instanceof LazyWrapper)) {
	        if (value instanceof LodashWrapper) {
	          return value;
	        }
	        if (hasOwnProperty.call(value, '__wrapped__')) {
	          return wrapperClone(value);
	        }
	      }
	      return new LodashWrapper(value);
	    }

	    /**
	     * The function whose prototype chain sequence wrappers inherit from.
	     *
	     * @private
	     */
	    function baseLodash() {
	      // No operation performed.
	    }

	    /**
	     * The base constructor for creating `lodash` wrapper objects.
	     *
	     * @private
	     * @param {*} value The value to wrap.
	     * @param {boolean} [chainAll] Enable explicit method chain sequences.
	     */
	    function LodashWrapper(value, chainAll) {
	      this.__wrapped__ = value;
	      this.__actions__ = [];
	      this.__chain__ = !!chainAll;
	      this.__index__ = 0;
	      this.__values__ = undefined;
	    }

	    /**
	     * By default, the template delimiters used by lodash are like those in
	     * embedded Ruby (ERB). Change the following template settings to use
	     * alternative delimiters.
	     *
	     * @static
	     * @memberOf _
	     * @type {Object}
	     */
	    lodash.templateSettings = {

	      /**
	       * Used to detect `data` property values to be HTML-escaped.
	       *
	       * @memberOf _.templateSettings
	       * @type {RegExp}
	       */
	      'escape': reEscape,

	      /**
	       * Used to detect code to be evaluated.
	       *
	       * @memberOf _.templateSettings
	       * @type {RegExp}
	       */
	      'evaluate': reEvaluate,

	      /**
	       * Used to detect `data` property values to inject.
	       *
	       * @memberOf _.templateSettings
	       * @type {RegExp}
	       */
	      'interpolate': reInterpolate,

	      /**
	       * Used to reference the data object in the template text.
	       *
	       * @memberOf _.templateSettings
	       * @type {string}
	       */
	      'variable': '',

	      /**
	       * Used to import variables into the compiled template.
	       *
	       * @memberOf _.templateSettings
	       * @type {Object}
	       */
	      'imports': {

	        /**
	         * A reference to the `lodash` function.
	         *
	         * @memberOf _.templateSettings.imports
	         * @type {Function}
	         */
	        '_': lodash
	      }
	    };

	    // Ensure wrappers are instances of `baseLodash`.
	    lodash.prototype = baseLodash.prototype;
	    lodash.prototype.constructor = lodash;

	    LodashWrapper.prototype = baseCreate(baseLodash.prototype);
	    LodashWrapper.prototype.constructor = LodashWrapper;

	    /*------------------------------------------------------------------------*/

	    /**
	     * Creates a lazy wrapper object which wraps `value` to enable lazy evaluation.
	     *
	     * @private
	     * @constructor
	     * @param {*} value The value to wrap.
	     */
	    function LazyWrapper(value) {
	      this.__wrapped__ = value;
	      this.__actions__ = [];
	      this.__dir__ = 1;
	      this.__filtered__ = false;
	      this.__iteratees__ = [];
	      this.__takeCount__ = MAX_ARRAY_LENGTH;
	      this.__views__ = [];
	    }

	    /**
	     * Creates a clone of the lazy wrapper object.
	     *
	     * @private
	     * @name clone
	     * @memberOf LazyWrapper
	     * @returns {Object} Returns the cloned `LazyWrapper` object.
	     */
	    function lazyClone() {
	      var result = new LazyWrapper(this.__wrapped__);
	      result.__actions__ = copyArray(this.__actions__);
	      result.__dir__ = this.__dir__;
	      result.__filtered__ = this.__filtered__;
	      result.__iteratees__ = copyArray(this.__iteratees__);
	      result.__takeCount__ = this.__takeCount__;
	      result.__views__ = copyArray(this.__views__);
	      return result;
	    }

	    /**
	     * Reverses the direction of lazy iteration.
	     *
	     * @private
	     * @name reverse
	     * @memberOf LazyWrapper
	     * @returns {Object} Returns the new reversed `LazyWrapper` object.
	     */
	    function lazyReverse() {
	      if (this.__filtered__) {
	        var result = new LazyWrapper(this);
	        result.__dir__ = -1;
	        result.__filtered__ = true;
	      } else {
	        result = this.clone();
	        result.__dir__ *= -1;
	      }
	      return result;
	    }

	    /**
	     * Extracts the unwrapped value from its lazy wrapper.
	     *
	     * @private
	     * @name value
	     * @memberOf LazyWrapper
	     * @returns {*} Returns the unwrapped value.
	     */
	    function lazyValue() {
	      var array = this.__wrapped__.value(),
	          dir = this.__dir__,
	          isArr = isArray(array),
	          isRight = dir < 0,
	          arrLength = isArr ? array.length : 0,
	          view = getView(0, arrLength, this.__views__),
	          start = view.start,
	          end = view.end,
	          length = end - start,
	          index = isRight ? end : (start - 1),
	          iteratees = this.__iteratees__,
	          iterLength = iteratees.length,
	          resIndex = 0,
	          takeCount = nativeMin(length, this.__takeCount__);

	      if (!isArr || arrLength < LARGE_ARRAY_SIZE ||
	          (arrLength == length && takeCount == length)) {
	        return baseWrapperValue(array, this.__actions__);
	      }
	      var result = [];

	      outer:
	      while (length-- && resIndex < takeCount) {
	        index += dir;

	        var iterIndex = -1,
	            value = array[index];

	        while (++iterIndex < iterLength) {
	          var data = iteratees[iterIndex],
	              iteratee = data.iteratee,
	              type = data.type,
	              computed = iteratee(value);

	          if (type == LAZY_MAP_FLAG) {
	            value = computed;
	          } else if (!computed) {
	            if (type == LAZY_FILTER_FLAG) {
	              continue outer;
	            } else {
	              break outer;
	            }
	          }
	        }
	        result[resIndex++] = value;
	      }
	      return result;
	    }

	    // Ensure `LazyWrapper` is an instance of `baseLodash`.
	    LazyWrapper.prototype = baseCreate(baseLodash.prototype);
	    LazyWrapper.prototype.constructor = LazyWrapper;

	    /*------------------------------------------------------------------------*/

	    /**
	     * Creates a hash object.
	     *
	     * @private
	     * @constructor
	     * @returns {Object} Returns the new hash object.
	     */
	    function Hash() {}

	    /**
	     * Removes `key` and its value from the hash.
	     *
	     * @private
	     * @param {Object} hash The hash to modify.
	     * @param {string} key The key of the value to remove.
	     * @returns {boolean} Returns `true` if the entry was removed, else `false`.
	     */
	    function hashDelete(hash, key) {
	      return hashHas(hash, key) && delete hash[key];
	    }

	    /**
	     * Gets the hash value for `key`.
	     *
	     * @private
	     * @param {Object} hash The hash to query.
	     * @param {string} key The key of the value to get.
	     * @returns {*} Returns the entry value.
	     */
	    function hashGet(hash, key) {
	      if (nativeCreate) {
	        var result = hash[key];
	        return result === HASH_UNDEFINED ? undefined : result;
	      }
	      return hasOwnProperty.call(hash, key) ? hash[key] : undefined;
	    }

	    /**
	     * Checks if a hash value for `key` exists.
	     *
	     * @private
	     * @param {Object} hash The hash to query.
	     * @param {string} key The key of the entry to check.
	     * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
	     */
	    function hashHas(hash, key) {
	      return nativeCreate ? hash[key] !== undefined : hasOwnProperty.call(hash, key);
	    }

	    /**
	     * Sets the hash `key` to `value`.
	     *
	     * @private
	     * @param {Object} hash The hash to modify.
	     * @param {string} key The key of the value to set.
	     * @param {*} value The value to set.
	     */
	    function hashSet(hash, key, value) {
	      hash[key] = (nativeCreate && value === undefined) ? HASH_UNDEFINED : value;
	    }

	    // Avoid inheriting from `Object.prototype` when possible.
	    Hash.prototype = nativeCreate ? nativeCreate(null) : objectProto;

	    /*------------------------------------------------------------------------*/

	    /**
	     * Creates a map cache object to store key-value pairs.
	     *
	     * @private
	     * @constructor
	     * @param {Array} [values] The values to cache.
	     */
	    function MapCache(values) {
	      var index = -1,
	          length = values ? values.length : 0;

	      this.clear();
	      while (++index < length) {
	        var entry = values[index];
	        this.set(entry[0], entry[1]);
	      }
	    }

	    /**
	     * Removes all key-value entries from the map.
	     *
	     * @private
	     * @name clear
	     * @memberOf MapCache
	     */
	    function mapClear() {
	      this.__data__ = {
	        'hash': new Hash,
	        'map': Map ? new Map : [],
	        'string': new Hash
	      };
	    }

	    /**
	     * Removes `key` and its value from the map.
	     *
	     * @private
	     * @name delete
	     * @memberOf MapCache
	     * @param {string} key The key of the value to remove.
	     * @returns {boolean} Returns `true` if the entry was removed, else `false`.
	     */
	    function mapDelete(key) {
	      var data = this.__data__;
	      if (isKeyable(key)) {
	        return hashDelete(typeof key == 'string' ? data.string : data.hash, key);
	      }
	      return Map ? data.map['delete'](key) : assocDelete(data.map, key);
	    }

	    /**
	     * Gets the map value for `key`.
	     *
	     * @private
	     * @name get
	     * @memberOf MapCache
	     * @param {string} key The key of the value to get.
	     * @returns {*} Returns the entry value.
	     */
	    function mapGet(key) {
	      var data = this.__data__;
	      if (isKeyable(key)) {
	        return hashGet(typeof key == 'string' ? data.string : data.hash, key);
	      }
	      return Map ? data.map.get(key) : assocGet(data.map, key);
	    }

	    /**
	     * Checks if a map value for `key` exists.
	     *
	     * @private
	     * @name has
	     * @memberOf MapCache
	     * @param {string} key The key of the entry to check.
	     * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
	     */
	    function mapHas(key) {
	      var data = this.__data__;
	      if (isKeyable(key)) {
	        return hashHas(typeof key == 'string' ? data.string : data.hash, key);
	      }
	      return Map ? data.map.has(key) : assocHas(data.map, key);
	    }

	    /**
	     * Sets the map `key` to `value`.
	     *
	     * @private
	     * @name set
	     * @memberOf MapCache
	     * @param {string} key The key of the value to set.
	     * @param {*} value The value to set.
	     * @returns {Object} Returns the map cache instance.
	     */
	    function mapSet(key, value) {
	      var data = this.__data__;
	      if (isKeyable(key)) {
	        hashSet(typeof key == 'string' ? data.string : data.hash, key, value);
	      } else if (Map) {
	        data.map.set(key, value);
	      } else {
	        assocSet(data.map, key, value);
	      }
	      return this;
	    }

	    // Add methods to `MapCache`.
	    MapCache.prototype.clear = mapClear;
	    MapCache.prototype['delete'] = mapDelete;
	    MapCache.prototype.get = mapGet;
	    MapCache.prototype.has = mapHas;
	    MapCache.prototype.set = mapSet;

	    /*------------------------------------------------------------------------*/

	    /**
	     *
	     * Creates a set cache object to store unique values.
	     *
	     * @private
	     * @constructor
	     * @param {Array} [values] The values to cache.
	     */
	    function SetCache(values) {
	      var index = -1,
	          length = values ? values.length : 0;

	      this.__data__ = new MapCache;
	      while (++index < length) {
	        this.push(values[index]);
	      }
	    }

	    /**
	     * Checks if `value` is in `cache`.
	     *
	     * @private
	     * @param {Object} cache The set cache to search.
	     * @param {*} value The value to search for.
	     * @returns {number} Returns `true` if `value` is found, else `false`.
	     */
	    function cacheHas(cache, value) {
	      var map = cache.__data__;
	      if (isKeyable(value)) {
	        var data = map.__data__,
	            hash = typeof value == 'string' ? data.string : data.hash;

	        return hash[value] === HASH_UNDEFINED;
	      }
	      return map.has(value);
	    }

	    /**
	     * Adds `value` to the set cache.
	     *
	     * @private
	     * @name push
	     * @memberOf SetCache
	     * @param {*} value The value to cache.
	     */
	    function cachePush(value) {
	      var map = this.__data__;
	      if (isKeyable(value)) {
	        var data = map.__data__,
	            hash = typeof value == 'string' ? data.string : data.hash;

	        hash[value] = HASH_UNDEFINED;
	      }
	      else {
	        map.set(value, HASH_UNDEFINED);
	      }
	    }

	    // Add methods to `SetCache`.
	    SetCache.prototype.push = cachePush;

	    /*------------------------------------------------------------------------*/

	    /**
	     * Creates a stack cache object to store key-value pairs.
	     *
	     * @private
	     * @constructor
	     * @param {Array} [values] The values to cache.
	     */
	    function Stack(values) {
	      var index = -1,
	          length = values ? values.length : 0;

	      this.clear();
	      while (++index < length) {
	        var entry = values[index];
	        this.set(entry[0], entry[1]);
	      }
	    }

	    /**
	     * Removes all key-value entries from the stack.
	     *
	     * @private
	     * @name clear
	     * @memberOf Stack
	     */
	    function stackClear() {
	      this.__data__ = { 'array': [], 'map': null };
	    }

	    /**
	     * Removes `key` and its value from the stack.
	     *
	     * @private
	     * @name delete
	     * @memberOf Stack
	     * @param {string} key The key of the value to remove.
	     * @returns {boolean} Returns `true` if the entry was removed, else `false`.
	     */
	    function stackDelete(key) {
	      var data = this.__data__,
	          array = data.array;

	      return array ? assocDelete(array, key) : data.map['delete'](key);
	    }

	    /**
	     * Gets the stack value for `key`.
	     *
	     * @private
	     * @name get
	     * @memberOf Stack
	     * @param {string} key The key of the value to get.
	     * @returns {*} Returns the entry value.
	     */
	    function stackGet(key) {
	      var data = this.__data__,
	          array = data.array;

	      return array ? assocGet(array, key) : data.map.get(key);
	    }

	    /**
	     * Checks if a stack value for `key` exists.
	     *
	     * @private
	     * @name has
	     * @memberOf Stack
	     * @param {string} key The key of the entry to check.
	     * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
	     */
	    function stackHas(key) {
	      var data = this.__data__,
	          array = data.array;

	      return array ? assocHas(array, key) : data.map.has(key);
	    }

	    /**
	     * Sets the stack `key` to `value`.
	     *
	     * @private
	     * @name set
	     * @memberOf Stack
	     * @param {string} key The key of the value to set.
	     * @param {*} value The value to set.
	     * @returns {Object} Returns the stack cache instance.
	     */
	    function stackSet(key, value) {
	      var data = this.__data__,
	          array = data.array;

	      if (array) {
	        if (array.length < (LARGE_ARRAY_SIZE - 1)) {
	          assocSet(array, key, value);
	        } else {
	          data.array = null;
	          data.map = new MapCache(array);
	        }
	      }
	      var map = data.map;
	      if (map) {
	        map.set(key, value);
	      }
	      return this;
	    }

	    // Add methods to `Stack`.
	    Stack.prototype.clear = stackClear;
	    Stack.prototype['delete'] = stackDelete;
	    Stack.prototype.get = stackGet;
	    Stack.prototype.has = stackHas;
	    Stack.prototype.set = stackSet;

	    /*------------------------------------------------------------------------*/

	    /**
	     * Removes `key` and its value from the associative array.
	     *
	     * @private
	     * @param {Array} array The array to modify.
	     * @param {string} key The key of the value to remove.
	     * @returns {boolean} Returns `true` if the entry was removed, else `false`.
	     */
	    function assocDelete(array, key) {
	      var index = assocIndexOf(array, key);
	      if (index < 0) {
	        return false;
	      }
	      var lastIndex = array.length - 1;
	      if (index == lastIndex) {
	        array.pop();
	      } else {
	        splice.call(array, index, 1);
	      }
	      return true;
	    }

	    /**
	     * Gets the associative array value for `key`.
	     *
	     * @private
	     * @param {Array} array The array to query.
	     * @param {string} key The key of the value to get.
	     * @returns {*} Returns the entry value.
	     */
	    function assocGet(array, key) {
	      var index = assocIndexOf(array, key);
	      return index < 0 ? undefined : array[index][1];
	    }

	    /**
	     * Checks if an associative array value for `key` exists.
	     *
	     * @private
	     * @param {Array} array The array to query.
	     * @param {string} key The key of the entry to check.
	     * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
	     */
	    function assocHas(array, key) {
	      return assocIndexOf(array, key) > -1;
	    }

	    /**
	     * Gets the index at which the `key` is found in `array` of key-value pairs.
	     *
	     * @private
	     * @param {Array} array The array to search.
	     * @param {*} key The key to search for.
	     * @returns {number} Returns the index of the matched value, else `-1`.
	     */
	    function assocIndexOf(array, key) {
	      var length = array.length;
	      while (length--) {
	        if (eq(array[length][0], key)) {
	          return length;
	        }
	      }
	      return -1;
	    }

	    /**
	     * Sets the associative array `key` to `value`.
	     *
	     * @private
	     * @param {Array} array The array to modify.
	     * @param {string} key The key of the value to set.
	     * @param {*} value The value to set.
	     */
	    function assocSet(array, key, value) {
	      var index = assocIndexOf(array, key);
	      if (index < 0) {
	        array.push([key, value]);
	      } else {
	        array[index][1] = value;
	      }
	    }

	    /*------------------------------------------------------------------------*/

	    /**
	     * Used by `_.defaults` to customize its `_.assignIn` use.
	     *
	     * @private
	     * @param {*} objValue The destination value.
	     * @param {*} srcValue The source value.
	     * @param {string} key The key of the property to assign.
	     * @param {Object} object The parent object of `objValue`.
	     * @returns {*} Returns the value to assign.
	     */
	    function assignInDefaults(objValue, srcValue, key, object) {
	      if (objValue === undefined ||
	          (eq(objValue, objectProto[key]) && !hasOwnProperty.call(object, key))) {
	        return srcValue;
	      }
	      return objValue;
	    }

	    /**
	     * This function is like `assignValue` except that it doesn't assign
	     * `undefined` values.
	     *
	     * @private
	     * @param {Object} object The object to modify.
	     * @param {string} key The key of the property to assign.
	     * @param {*} value The value to assign.
	     */
	    function assignMergeValue(object, key, value) {
	      if ((value !== undefined && !eq(object[key], value)) ||
	          (typeof key == 'number' && value === undefined && !(key in object))) {
	        object[key] = value;
	      }
	    }

	    /**
	     * Assigns `value` to `key` of `object` if the existing value is not equivalent
	     * using [`SameValueZero`](http://ecma-international.org/ecma-262/6.0/#sec-samevaluezero)
	     * for equality comparisons.
	     *
	     * @private
	     * @param {Object} object The object to modify.
	     * @param {string} key The key of the property to assign.
	     * @param {*} value The value to assign.
	     */
	    function assignValue(object, key, value) {
	      var objValue = object[key];
	      if (!(hasOwnProperty.call(object, key) && eq(objValue, value)) ||
	          (value === undefined && !(key in object))) {
	        object[key] = value;
	      }
	    }

	    /**
	     * Aggregates elements of `collection` on `accumulator` with keys transformed
	     * by `iteratee` and values set by `setter`.
	     *
	     * @private
	     * @param {Array|Object} collection The collection to iterate over.
	     * @param {Function} setter The function to set `accumulator` values.
	     * @param {Function} iteratee The iteratee to transform keys.
	     * @param {Object} accumulator The initial aggregated object.
	     * @returns {Function} Returns `accumulator`.
	     */
	    function baseAggregator(collection, setter, iteratee, accumulator) {
	      baseEach(collection, function(value, key, collection) {
	        setter(accumulator, value, iteratee(value), collection);
	      });
	      return accumulator;
	    }

	    /**
	     * The base implementation of `_.assign` without support for multiple sources
	     * or `customizer` functions.
	     *
	     * @private
	     * @param {Object} object The destination object.
	     * @param {Object} source The source object.
	     * @returns {Object} Returns `object`.
	     */
	    function baseAssign(object, source) {
	      return object && copyObject(source, keys(source), object);
	    }

	    /**
	     * The base implementation of `_.at` without support for individual paths.
	     *
	     * @private
	     * @param {Object} object The object to iterate over.
	     * @param {string[]} paths The property paths of elements to pick.
	     * @returns {Array} Returns the new array of picked elements.
	     */
	    function baseAt(object, paths) {
	      var index = -1,
	          isNil = object == null,
	          length = paths.length,
	          result = Array(length);

	      while (++index < length) {
	        result[index] = isNil ? undefined : get(object, paths[index]);
	      }
	      return result;
	    }

	    /**
	     * The base implementation of `_.clamp` which doesn't coerce arguments to numbers.
	     *
	     * @private
	     * @param {number} number The number to clamp.
	     * @param {number} [lower] The lower bound.
	     * @param {number} upper The upper bound.
	     * @returns {number} Returns the clamped number.
	     */
	    function baseClamp(number, lower, upper) {
	      if (number === number) {
	        if (upper !== undefined) {
	          number = number <= upper ? number : upper;
	        }
	        if (lower !== undefined) {
	          number = number >= lower ? number : lower;
	        }
	      }
	      return number;
	    }

	    /**
	     * The base implementation of `_.clone` and `_.cloneDeep` which tracks
	     * traversed objects.
	     *
	     * @private
	     * @param {*} value The value to clone.
	     * @param {boolean} [isDeep] Specify a deep clone.
	     * @param {boolean} [isFull] Specify a clone including symbols.
	     * @param {Function} [customizer] The function to customize cloning.
	     * @param {string} [key] The key of `value`.
	     * @param {Object} [object] The parent object of `value`.
	     * @param {Object} [stack] Tracks traversed objects and their clone counterparts.
	     * @returns {*} Returns the cloned value.
	     */
	    function baseClone(value, isDeep, isFull, customizer, key, object, stack) {
	      var result;
	      if (customizer) {
	        result = object ? customizer(value, key, object, stack) : customizer(value);
	      }
	      if (result !== undefined) {
	        return result;
	      }
	      if (!isObject(value)) {
	        return value;
	      }
	      var isArr = isArray(value);
	      if (isArr) {
	        result = initCloneArray(value);
	        if (!isDeep) {
	          return copyArray(value, result);
	        }
	      } else {
	        var tag = getTag(value),
	            isFunc = tag == funcTag || tag == genTag;

	        if (isBuffer(value)) {
	          return cloneBuffer(value, isDeep);
	        }
	        if (tag == objectTag || tag == argsTag || (isFunc && !object)) {
	          if (isHostObject(value)) {
	            return object ? value : {};
	          }
	          result = initCloneObject(isFunc ? {} : value);
	          if (!isDeep) {
	            return copySymbols(value, baseAssign(result, value));
	          }
	        } else {
	          if (!cloneableTags[tag]) {
	            return object ? value : {};
	          }
	          result = initCloneByTag(value, tag, baseClone, isDeep);
	        }
	      }
	      // Check for circular references and return its corresponding clone.
	      stack || (stack = new Stack);
	      var stacked = stack.get(value);
	      if (stacked) {
	        return stacked;
	      }
	      stack.set(value, result);

	      if (!isArr) {
	        var props = isFull ? getAllKeys(value) : keys(value);
	      }
	      // Recursively populate clone (susceptible to call stack limits).
	      arrayEach(props || value, function(subValue, key) {
	        if (props) {
	          key = subValue;
	          subValue = value[key];
	        }
	        assignValue(result, key, baseClone(subValue, isDeep, isFull, customizer, key, value, stack));
	      });
	      return result;
	    }

	    /**
	     * The base implementation of `_.conforms` which doesn't clone `source`.
	     *
	     * @private
	     * @param {Object} source The object of property predicates to conform to.
	     * @returns {Function} Returns the new function.
	     */
	    function baseConforms(source) {
	      var props = keys(source),
	          length = props.length;

	      return function(object) {
	        if (object == null) {
	          return !length;
	        }
	        var index = length;
	        while (index--) {
	          var key = props[index],
	              predicate = source[key],
	              value = object[key];

	          if ((value === undefined &&
	              !(key in Object(object))) || !predicate(value)) {
	            return false;
	          }
	        }
	        return true;
	      };
	    }

	    /**
	     * The base implementation of `_.create` without support for assigning
	     * properties to the created object.
	     *
	     * @private
	     * @param {Object} prototype The object to inherit from.
	     * @returns {Object} Returns the new object.
	     */
	    function baseCreate(proto) {
	      return isObject(proto) ? objectCreate(proto) : {};
	    }

	    /**
	     * The base implementation of `_.delay` and `_.defer` which accepts an array
	     * of `func` arguments.
	     *
	     * @private
	     * @param {Function} func The function to delay.
	     * @param {number} wait The number of milliseconds to delay invocation.
	     * @param {Object} args The arguments to provide to `func`.
	     * @returns {number} Returns the timer id.
	     */
	    function baseDelay(func, wait, args) {
	      if (typeof func != 'function') {
	        throw new TypeError(FUNC_ERROR_TEXT);
	      }
	      return setTimeout(function() { func.apply(undefined, args); }, wait);
	    }

	    /**
	     * The base implementation of methods like `_.difference` without support
	     * for excluding multiple arrays or iteratee shorthands.
	     *
	     * @private
	     * @param {Array} array The array to inspect.
	     * @param {Array} values The values to exclude.
	     * @param {Function} [iteratee] The iteratee invoked per element.
	     * @param {Function} [comparator] The comparator invoked per element.
	     * @returns {Array} Returns the new array of filtered values.
	     */
	    function baseDifference(array, values, iteratee, comparator) {
	      var index = -1,
	          includes = arrayIncludes,
	          isCommon = true,
	          length = array.length,
	          result = [],
	          valuesLength = values.length;

	      if (!length) {
	        return result;
	      }
	      if (iteratee) {
	        values = arrayMap(values, baseUnary(iteratee));
	      }
	      if (comparator) {
	        includes = arrayIncludesWith;
	        isCommon = false;
	      }
	      else if (values.length >= LARGE_ARRAY_SIZE) {
	        includes = cacheHas;
	        isCommon = false;
	        values = new SetCache(values);
	      }
	      outer:
	      while (++index < length) {
	        var value = array[index],
	            computed = iteratee ? iteratee(value) : value;

	        if (isCommon && computed === computed) {
	          var valuesIndex = valuesLength;
	          while (valuesIndex--) {
	            if (values[valuesIndex] === computed) {
	              continue outer;
	            }
	          }
	          result.push(value);
	        }
	        else if (!includes(values, computed, comparator)) {
	          result.push(value);
	        }
	      }
	      return result;
	    }

	    /**
	     * The base implementation of `_.forEach` without support for iteratee shorthands.
	     *
	     * @private
	     * @param {Array|Object} collection The collection to iterate over.
	     * @param {Function} iteratee The function invoked per iteration.
	     * @returns {Array|Object} Returns `collection`.
	     */
	    var baseEach = createBaseEach(baseForOwn);

	    /**
	     * The base implementation of `_.forEachRight` without support for iteratee shorthands.
	     *
	     * @private
	     * @param {Array|Object} collection The collection to iterate over.
	     * @param {Function} iteratee The function invoked per iteration.
	     * @returns {Array|Object} Returns `collection`.
	     */
	    var baseEachRight = createBaseEach(baseForOwnRight, true);

	    /**
	     * The base implementation of `_.every` without support for iteratee shorthands.
	     *
	     * @private
	     * @param {Array|Object} collection The collection to iterate over.
	     * @param {Function} predicate The function invoked per iteration.
	     * @returns {boolean} Returns `true` if all elements pass the predicate check,
	     *  else `false`
	     */
	    function baseEvery(collection, predicate) {
	      var result = true;
	      baseEach(collection, function(value, index, collection) {
	        result = !!predicate(value, index, collection);
	        return result;
	      });
	      return result;
	    }

	    /**
	     * The base implementation of `_.fill` without an iteratee call guard.
	     *
	     * @private
	     * @param {Array} array The array to fill.
	     * @param {*} value The value to fill `array` with.
	     * @param {number} [start=0] The start position.
	     * @param {number} [end=array.length] The end position.
	     * @returns {Array} Returns `array`.
	     */
	    function baseFill(array, value, start, end) {
	      var length = array.length;

	      start = toInteger(start);
	      if (start < 0) {
	        start = -start > length ? 0 : (length + start);
	      }
	      end = (end === undefined || end > length) ? length : toInteger(end);
	      if (end < 0) {
	        end += length;
	      }
	      end = start > end ? 0 : toLength(end);
	      while (start < end) {
	        array[start++] = value;
	      }
	      return array;
	    }

	    /**
	     * The base implementation of `_.filter` without support for iteratee shorthands.
	     *
	     * @private
	     * @param {Array|Object} collection The collection to iterate over.
	     * @param {Function} predicate The function invoked per iteration.
	     * @returns {Array} Returns the new filtered array.
	     */
	    function baseFilter(collection, predicate) {
	      var result = [];
	      baseEach(collection, function(value, index, collection) {
	        if (predicate(value, index, collection)) {
	          result.push(value);
	        }
	      });
	      return result;
	    }

	    /**
	     * The base implementation of `_.flatten` with support for restricting flattening.
	     *
	     * @private
	     * @param {Array} array The array to flatten.
	     * @param {number} depth The maximum recursion depth.
	     * @param {boolean} [predicate=isFlattenable] The function invoked per iteration.
	     * @param {boolean} [isStrict] Restrict to values that pass `predicate` checks.
	     * @param {Array} [result=[]] The initial result value.
	     * @returns {Array} Returns the new flattened array.
	     */
	    function baseFlatten(array, depth, predicate, isStrict, result) {
	      var index = -1,
	          length = array.length;

	      predicate || (predicate = isFlattenable);
	      result || (result = []);

	      while (++index < length) {
	        var value = array[index];
	        if (depth > 0 && predicate(value)) {
	          if (depth > 1) {
	            // Recursively flatten arrays (susceptible to call stack limits).
	            baseFlatten(value, depth - 1, predicate, isStrict, result);
	          } else {
	            arrayPush(result, value);
	          }
	        } else if (!isStrict) {
	          result[result.length] = value;
	        }
	      }
	      return result;
	    }

	    /**
	     * The base implementation of `baseForOwn` which iterates over `object`
	     * properties returned by `keysFunc` and invokes `iteratee` for each property.
	     * Iteratee functions may exit iteration early by explicitly returning `false`.
	     *
	     * @private
	     * @param {Object} object The object to iterate over.
	     * @param {Function} iteratee The function invoked per iteration.
	     * @param {Function} keysFunc The function to get the keys of `object`.
	     * @returns {Object} Returns `object`.
	     */
	    var baseFor = createBaseFor();

	    /**
	     * This function is like `baseFor` except that it iterates over properties
	     * in the opposite order.
	     *
	     * @private
	     * @param {Object} object The object to iterate over.
	     * @param {Function} iteratee The function invoked per iteration.
	     * @param {Function} keysFunc The function to get the keys of `object`.
	     * @returns {Object} Returns `object`.
	     */
	    var baseForRight = createBaseFor(true);

	    /**
	     * The base implementation of `_.forOwn` without support for iteratee shorthands.
	     *
	     * @private
	     * @param {Object} object The object to iterate over.
	     * @param {Function} iteratee The function invoked per iteration.
	     * @returns {Object} Returns `object`.
	     */
	    function baseForOwn(object, iteratee) {
	      return object && baseFor(object, iteratee, keys);
	    }

	    /**
	     * The base implementation of `_.forOwnRight` without support for iteratee shorthands.
	     *
	     * @private
	     * @param {Object} object The object to iterate over.
	     * @param {Function} iteratee The function invoked per iteration.
	     * @returns {Object} Returns `object`.
	     */
	    function baseForOwnRight(object, iteratee) {
	      return object && baseForRight(object, iteratee, keys);
	    }

	    /**
	     * The base implementation of `_.functions` which creates an array of
	     * `object` function property names filtered from `props`.
	     *
	     * @private
	     * @param {Object} object The object to inspect.
	     * @param {Array} props The property names to filter.
	     * @returns {Array} Returns the new array of filtered property names.
	     */
	    function baseFunctions(object, props) {
	      return arrayFilter(props, function(key) {
	        return isFunction(object[key]);
	      });
	    }

	    /**
	     * The base implementation of `_.get` without support for default values.
	     *
	     * @private
	     * @param {Object} object The object to query.
	     * @param {Array|string} path The path of the property to get.
	     * @returns {*} Returns the resolved value.
	     */
	    function baseGet(object, path) {
	      path = isKey(path, object) ? [path] : castPath(path);

	      var index = 0,
	          length = path.length;

	      while (object != null && index < length) {
	        object = object[path[index++]];
	      }
	      return (index && index == length) ? object : undefined;
	    }

	    /**
	     * The base implementation of `getAllKeys` and `getAllKeysIn` which uses
	     * `keysFunc` and `symbolsFunc` to get the enumerable property names and
	     * symbols of `object`.
	     *
	     * @private
	     * @param {Object} object The object to query.
	     * @param {Function} keysFunc The function to get the keys of `object`.
	     * @param {Function} symbolsFunc The function to get the symbols of `object`.
	     * @returns {Array} Returns the array of property names and symbols.
	     */
	    function baseGetAllKeys(object, keysFunc, symbolsFunc) {
	      var result = keysFunc(object);
	      return isArray(object)
	        ? result
	        : arrayPush(result, symbolsFunc(object));
	    }

	    /**
	     * The base implementation of `_.has` without support for deep paths.
	     *
	     * @private
	     * @param {Object} object The object to query.
	     * @param {Array|string} key The key to check.
	     * @returns {boolean} Returns `true` if `key` exists, else `false`.
	     */
	    function baseHas(object, key) {
	      // Avoid a bug in IE 10-11 where objects with a [[Prototype]] of `null`,
	      // that are composed entirely of index properties, return `false` for
	      // `hasOwnProperty` checks of them.
	      return hasOwnProperty.call(object, key) ||
	        (typeof object == 'object' && key in object && getPrototype(object) === null);
	    }

	    /**
	     * The base implementation of `_.hasIn` without support for deep paths.
	     *
	     * @private
	     * @param {Object} object The object to query.
	     * @param {Array|string} key The key to check.
	     * @returns {boolean} Returns `true` if `key` exists, else `false`.
	     */
	    function baseHasIn(object, key) {
	      return key in Object(object);
	    }

	    /**
	     * The base implementation of `_.inRange` which doesn't coerce arguments to numbers.
	     *
	     * @private
	     * @param {number} number The number to check.
	     * @param {number} start The start of the range.
	     * @param {number} end The end of the range.
	     * @returns {boolean} Returns `true` if `number` is in the range, else `false`.
	     */
	    function baseInRange(number, start, end) {
	      return number >= nativeMin(start, end) && number < nativeMax(start, end);
	    }

	    /**
	     * The base implementation of methods like `_.intersection`, without support
	     * for iteratee shorthands, that accepts an array of arrays to inspect.
	     *
	     * @private
	     * @param {Array} arrays The arrays to inspect.
	     * @param {Function} [iteratee] The iteratee invoked per element.
	     * @param {Function} [comparator] The comparator invoked per element.
	     * @returns {Array} Returns the new array of shared values.
	     */
	    function baseIntersection(arrays, iteratee, comparator) {
	      var includes = comparator ? arrayIncludesWith : arrayIncludes,
	          length = arrays[0].length,
	          othLength = arrays.length,
	          othIndex = othLength,
	          caches = Array(othLength),
	          maxLength = Infinity,
	          result = [];

	      while (othIndex--) {
	        var array = arrays[othIndex];
	        if (othIndex && iteratee) {
	          array = arrayMap(array, baseUnary(iteratee));
	        }
	        maxLength = nativeMin(array.length, maxLength);
	        caches[othIndex] = !comparator && (iteratee || (length >= 120 && array.length >= 120))
	          ? new SetCache(othIndex && array)
	          : undefined;
	      }
	      array = arrays[0];

	      var index = -1,
	          seen = caches[0];

	      outer:
	      while (++index < length && result.length < maxLength) {
	        var value = array[index],
	            computed = iteratee ? iteratee(value) : value;

	        if (!(seen
	              ? cacheHas(seen, computed)
	              : includes(result, computed, comparator)
	            )) {
	          othIndex = othLength;
	          while (--othIndex) {
	            var cache = caches[othIndex];
	            if (!(cache
	                  ? cacheHas(cache, computed)
	                  : includes(arrays[othIndex], computed, comparator))
	                ) {
	              continue outer;
	            }
	          }
	          if (seen) {
	            seen.push(computed);
	          }
	          result.push(value);
	        }
	      }
	      return result;
	    }

	    /**
	     * The base implementation of `_.invert` and `_.invertBy` which inverts
	     * `object` with values transformed by `iteratee` and set by `setter`.
	     *
	     * @private
	     * @param {Object} object The object to iterate over.
	     * @param {Function} setter The function to set `accumulator` values.
	     * @param {Function} iteratee The iteratee to transform values.
	     * @param {Object} accumulator The initial inverted object.
	     * @returns {Function} Returns `accumulator`.
	     */
	    function baseInverter(object, setter, iteratee, accumulator) {
	      baseForOwn(object, function(value, key, object) {
	        setter(accumulator, iteratee(value), key, object);
	      });
	      return accumulator;
	    }

	    /**
	     * The base implementation of `_.invoke` without support for individual
	     * method arguments.
	     *
	     * @private
	     * @param {Object} object The object to query.
	     * @param {Array|string} path The path of the method to invoke.
	     * @param {Array} args The arguments to invoke the method with.
	     * @returns {*} Returns the result of the invoked method.
	     */
	    function baseInvoke(object, path, args) {
	      if (!isKey(path, object)) {
	        path = castPath(path);
	        object = parent(object, path);
	        path = last(path);
	      }
	      var func = object == null ? object : object[path];
	      return func == null ? undefined : apply(func, object, args);
	    }

	    /**
	     * The base implementation of `_.isEqual` which supports partial comparisons
	     * and tracks traversed objects.
	     *
	     * @private
	     * @param {*} value The value to compare.
	     * @param {*} other The other value to compare.
	     * @param {Function} [customizer] The function to customize comparisons.
	     * @param {boolean} [bitmask] The bitmask of comparison flags.
	     *  The bitmask may be composed of the following flags:
	     *     1 - Unordered comparison
	     *     2 - Partial comparison
	     * @param {Object} [stack] Tracks traversed `value` and `other` objects.
	     * @returns {boolean} Returns `true` if the values are equivalent, else `false`.
	     */
	    function baseIsEqual(value, other, customizer, bitmask, stack) {
	      if (value === other) {
	        return true;
	      }
	      if (value == null || other == null || (!isObject(value) && !isObjectLike(other))) {
	        return value !== value && other !== other;
	      }
	      return baseIsEqualDeep(value, other, baseIsEqual, customizer, bitmask, stack);
	    }

	    /**
	     * A specialized version of `baseIsEqual` for arrays and objects which performs
	     * deep comparisons and tracks traversed objects enabling objects with circular
	     * references to be compared.
	     *
	     * @private
	     * @param {Object} object The object to compare.
	     * @param {Object} other The other object to compare.
	     * @param {Function} equalFunc The function to determine equivalents of values.
	     * @param {Function} [customizer] The function to customize comparisons.
	     * @param {number} [bitmask] The bitmask of comparison flags. See `baseIsEqual`
	     *  for more details.
	     * @param {Object} [stack] Tracks traversed `object` and `other` objects.
	     * @returns {boolean} Returns `true` if the objects are equivalent, else `false`.
	     */
	    function baseIsEqualDeep(object, other, equalFunc, customizer, bitmask, stack) {
	      var objIsArr = isArray(object),
	          othIsArr = isArray(other),
	          objTag = arrayTag,
	          othTag = arrayTag;

	      if (!objIsArr) {
	        objTag = getTag(object);
	        objTag = objTag == argsTag ? objectTag : objTag;
	      }
	      if (!othIsArr) {
	        othTag = getTag(other);
	        othTag = othTag == argsTag ? objectTag : othTag;
	      }
	      var objIsObj = objTag == objectTag && !isHostObject(object),
	          othIsObj = othTag == objectTag && !isHostObject(other),
	          isSameTag = objTag == othTag;

	      if (isSameTag && !objIsObj) {
	        stack || (stack = new Stack);
	        return (objIsArr || isTypedArray(object))
	          ? equalArrays(object, other, equalFunc, customizer, bitmask, stack)
	          : equalByTag(object, other, objTag, equalFunc, customizer, bitmask, stack);
	      }
	      if (!(bitmask & PARTIAL_COMPARE_FLAG)) {
	        var objIsWrapped = objIsObj && hasOwnProperty.call(object, '__wrapped__'),
	            othIsWrapped = othIsObj && hasOwnProperty.call(other, '__wrapped__');

	        if (objIsWrapped || othIsWrapped) {
	          var objUnwrapped = objIsWrapped ? object.value() : object,
	              othUnwrapped = othIsWrapped ? other.value() : other;

	          stack || (stack = new Stack);
	          return equalFunc(objUnwrapped, othUnwrapped, customizer, bitmask, stack);
	        }
	      }
	      if (!isSameTag) {
	        return false;
	      }
	      stack || (stack = new Stack);
	      return equalObjects(object, other, equalFunc, customizer, bitmask, stack);
	    }

	    /**
	     * The base implementation of `_.isMatch` without support for iteratee shorthands.
	     *
	     * @private
	     * @param {Object} object The object to inspect.
	     * @param {Object} source The object of property values to match.
	     * @param {Array} matchData The property names, values, and compare flags to match.
	     * @param {Function} [customizer] The function to customize comparisons.
	     * @returns {boolean} Returns `true` if `object` is a match, else `false`.
	     */
	    function baseIsMatch(object, source, matchData, customizer) {
	      var index = matchData.length,
	          length = index,
	          noCustomizer = !customizer;

	      if (object == null) {
	        return !length;
	      }
	      object = Object(object);
	      while (index--) {
	        var data = matchData[index];
	        if ((noCustomizer && data[2])
	              ? data[1] !== object[data[0]]
	              : !(data[0] in object)
	            ) {
	          return false;
	        }
	      }
	      while (++index < length) {
	        data = matchData[index];
	        var key = data[0],
	            objValue = object[key],
	            srcValue = data[1];

	        if (noCustomizer && data[2]) {
	          if (objValue === undefined && !(key in object)) {
	            return false;
	          }
	        } else {
	          var stack = new Stack;
	          if (customizer) {
	            var result = customizer(objValue, srcValue, key, object, source, stack);
	          }
	          if (!(result === undefined
	                ? baseIsEqual(srcValue, objValue, customizer, UNORDERED_COMPARE_FLAG | PARTIAL_COMPARE_FLAG, stack)
	                : result
	              )) {
	            return false;
	          }
	        }
	      }
	      return true;
	    }

	    /**
	     * The base implementation of `_.iteratee`.
	     *
	     * @private
	     * @param {*} [value=_.identity] The value to convert to an iteratee.
	     * @returns {Function} Returns the iteratee.
	     */
	    function baseIteratee(value) {
	      // Don't store the `typeof` result in a variable to avoid a JIT bug in Safari 9.
	      // See https://bugs.webkit.org/show_bug.cgi?id=156034 for more details.
	      if (typeof value == 'function') {
	        return value;
	      }
	      if (value == null) {
	        return identity;
	      }
	      if (typeof value == 'object') {
	        return isArray(value)
	          ? baseMatchesProperty(value[0], value[1])
	          : baseMatches(value);
	      }
	      return property(value);
	    }

	    /**
	     * The base implementation of `_.keys` which doesn't skip the constructor
	     * property of prototypes or treat sparse arrays as dense.
	     *
	     * @private
	     * @param {Object} object The object to query.
	     * @returns {Array} Returns the array of property names.
	     */
	    function baseKeys(object) {
	      return nativeKeys(Object(object));
	    }

	    /**
	     * The base implementation of `_.keysIn` which doesn't skip the constructor
	     * property of prototypes or treat sparse arrays as dense.
	     *
	     * @private
	     * @param {Object} object The object to query.
	     * @returns {Array} Returns the array of property names.
	     */
	    function baseKeysIn(object) {
	      object = object == null ? object : Object(object);

	      var result = [];
	      for (var key in object) {
	        result.push(key);
	      }
	      return result;
	    }

	    // Fallback for IE < 9 with es6-shim.
	    if (enumerate && !propertyIsEnumerable.call({ 'valueOf': 1 }, 'valueOf')) {
	      baseKeysIn = function(object) {
	        return iteratorToArray(enumerate(object));
	      };
	    }

	    /**
	     * The base implementation of `_.map` without support for iteratee shorthands.
	     *
	     * @private
	     * @param {Array|Object} collection The collection to iterate over.
	     * @param {Function} iteratee The function invoked per iteration.
	     * @returns {Array} Returns the new mapped array.
	     */
	    function baseMap(collection, iteratee) {
	      var index = -1,
	          result = isArrayLike(collection) ? Array(collection.length) : [];

	      baseEach(collection, function(value, key, collection) {
	        result[++index] = iteratee(value, key, collection);
	      });
	      return result;
	    }

	    /**
	     * The base implementation of `_.matches` which doesn't clone `source`.
	     *
	     * @private
	     * @param {Object} source The object of property values to match.
	     * @returns {Function} Returns the new function.
	     */
	    function baseMatches(source) {
	      var matchData = getMatchData(source);
	      if (matchData.length == 1 && matchData[0][2]) {
	        return matchesStrictComparable(matchData[0][0], matchData[0][1]);
	      }
	      return function(object) {
	        return object === source || baseIsMatch(object, source, matchData);
	      };
	    }

	    /**
	     * The base implementation of `_.matchesProperty` which doesn't clone `srcValue`.
	     *
	     * @private
	     * @param {string} path The path of the property to get.
	     * @param {*} srcValue The value to match.
	     * @returns {Function} Returns the new function.
	     */
	    function baseMatchesProperty(path, srcValue) {
	      if (isKey(path) && isStrictComparable(srcValue)) {
	        return matchesStrictComparable(path, srcValue);
	      }
	      return function(object) {
	        var objValue = get(object, path);
	        return (objValue === undefined && objValue === srcValue)
	          ? hasIn(object, path)
	          : baseIsEqual(srcValue, objValue, undefined, UNORDERED_COMPARE_FLAG | PARTIAL_COMPARE_FLAG);
	      };
	    }

	    /**
	     * The base implementation of `_.merge` without support for multiple sources.
	     *
	     * @private
	     * @param {Object} object The destination object.
	     * @param {Object} source The source object.
	     * @param {number} srcIndex The index of `source`.
	     * @param {Function} [customizer] The function to customize merged values.
	     * @param {Object} [stack] Tracks traversed source values and their merged
	     *  counterparts.
	     */
	    function baseMerge(object, source, srcIndex, customizer, stack) {
	      if (object === source) {
	        return;
	      }
	      if (!(isArray(source) || isTypedArray(source))) {
	        var props = keysIn(source);
	      }
	      arrayEach(props || source, function(srcValue, key) {
	        if (props) {
	          key = srcValue;
	          srcValue = source[key];
	        }
	        if (isObject(srcValue)) {
	          stack || (stack = new Stack);
	          baseMergeDeep(object, source, key, srcIndex, baseMerge, customizer, stack);
	        }
	        else {
	          var newValue = customizer
	            ? customizer(object[key], srcValue, (key + ''), object, source, stack)
	            : undefined;

	          if (newValue === undefined) {
	            newValue = srcValue;
	          }
	          assignMergeValue(object, key, newValue);
	        }
	      });
	    }

	    /**
	     * A specialized version of `baseMerge` for arrays and objects which performs
	     * deep merges and tracks traversed objects enabling objects with circular
	     * references to be merged.
	     *
	     * @private
	     * @param {Object} object The destination object.
	     * @param {Object} source The source object.
	     * @param {string} key The key of the value to merge.
	     * @param {number} srcIndex The index of `source`.
	     * @param {Function} mergeFunc The function to merge values.
	     * @param {Function} [customizer] The function to customize assigned values.
	     * @param {Object} [stack] Tracks traversed source values and their merged
	     *  counterparts.
	     */
	    function baseMergeDeep(object, source, key, srcIndex, mergeFunc, customizer, stack) {
	      var objValue = object[key],
	          srcValue = source[key],
	          stacked = stack.get(srcValue);

	      if (stacked) {
	        assignMergeValue(object, key, stacked);
	        return;
	      }
	      var newValue = customizer
	        ? customizer(objValue, srcValue, (key + ''), object, source, stack)
	        : undefined;

	      var isCommon = newValue === undefined;

	      if (isCommon) {
	        newValue = srcValue;
	        if (isArray(srcValue) || isTypedArray(srcValue)) {
	          if (isArray(objValue)) {
	            newValue = objValue;
	          }
	          else if (isArrayLikeObject(objValue)) {
	            newValue = copyArray(objValue);
	          }
	          else {
	            isCommon = false;
	            newValue = baseClone(srcValue, true);
	          }
	        }
	        else if (isPlainObject(srcValue) || isArguments(srcValue)) {
	          if (isArguments(objValue)) {
	            newValue = toPlainObject(objValue);
	          }
	          else if (!isObject(objValue) || (srcIndex && isFunction(objValue))) {
	            isCommon = false;
	            newValue = baseClone(srcValue, true);
	          }
	          else {
	            newValue = objValue;
	          }
	        }
	        else {
	          isCommon = false;
	        }
	      }
	      stack.set(srcValue, newValue);

	      if (isCommon) {
	        // Recursively merge objects and arrays (susceptible to call stack limits).
	        mergeFunc(newValue, srcValue, srcIndex, customizer, stack);
	      }
	      stack['delete'](srcValue);
	      assignMergeValue(object, key, newValue);
	    }

	    /**
	     * The base implementation of `_.nth` which doesn't coerce `n` to an integer.
	     *
	     * @private
	     * @param {Array} array The array to query.
	     * @param {number} n The index of the element to return.
	     * @returns {*} Returns the nth element of `array`.
	     */
	    function baseNth(array, n) {
	      var length = array.length;
	      if (!length) {
	        return;
	      }
	      n += n < 0 ? length : 0;
	      return isIndex(n, length) ? array[n] : undefined;
	    }

	    /**
	     * The base implementation of `_.orderBy` without param guards.
	     *
	     * @private
	     * @param {Array|Object} collection The collection to iterate over.
	     * @param {Function[]|Object[]|string[]} iteratees The iteratees to sort by.
	     * @param {string[]} orders The sort orders of `iteratees`.
	     * @returns {Array} Returns the new sorted array.
	     */
	    function baseOrderBy(collection, iteratees, orders) {
	      var index = -1;
	      iteratees = arrayMap(iteratees.length ? iteratees : [identity], baseUnary(getIteratee()));

	      var result = baseMap(collection, function(value, key, collection) {
	        var criteria = arrayMap(iteratees, function(iteratee) {
	          return iteratee(value);
	        });
	        return { 'criteria': criteria, 'index': ++index, 'value': value };
	      });

	      return baseSortBy(result, function(object, other) {
	        return compareMultiple(object, other, orders);
	      });
	    }

	    /**
	     * The base implementation of `_.pick` without support for individual
	     * property identifiers.
	     *
	     * @private
	     * @param {Object} object The source object.
	     * @param {string[]} props The property identifiers to pick.
	     * @returns {Object} Returns the new object.
	     */
	    function basePick(object, props) {
	      object = Object(object);
	      return arrayReduce(props, function(result, key) {
	        if (key in object) {
	          result[key] = object[key];
	        }
	        return result;
	      }, {});
	    }

	    /**
	     * The base implementation of  `_.pickBy` without support for iteratee shorthands.
	     *
	     * @private
	     * @param {Object} object The source object.
	     * @param {Function} predicate The function invoked per property.
	     * @returns {Object} Returns the new object.
	     */
	    function basePickBy(object, predicate) {
	      var index = -1,
	          props = getAllKeysIn(object),
	          length = props.length,
	          result = {};

	      while (++index < length) {
	        var key = props[index],
	            value = object[key];

	        if (predicate(value, key)) {
	          result[key] = value;
	        }
	      }
	      return result;
	    }

	    /**
	     * The base implementation of `_.property` without support for deep paths.
	     *
	     * @private
	     * @param {string} key The key of the property to get.
	     * @returns {Function} Returns the new function.
	     */
	    function baseProperty(key) {
	      return function(object) {
	        return object == null ? undefined : object[key];
	      };
	    }

	    /**
	     * A specialized version of `baseProperty` which supports deep paths.
	     *
	     * @private
	     * @param {Array|string} path The path of the property to get.
	     * @returns {Function} Returns the new function.
	     */
	    function basePropertyDeep(path) {
	      return function(object) {
	        return baseGet(object, path);
	      };
	    }

	    /**
	     * The base implementation of `_.pullAllBy` without support for iteratee
	     * shorthands.
	     *
	     * @private
	     * @param {Array} array The array to modify.
	     * @param {Array} values The values to remove.
	     * @param {Function} [iteratee] The iteratee invoked per element.
	     * @param {Function} [comparator] The comparator invoked per element.
	     * @returns {Array} Returns `array`.
	     */
	    function basePullAll(array, values, iteratee, comparator) {
	      var indexOf = comparator ? baseIndexOfWith : baseIndexOf,
	          index = -1,
	          length = values.length,
	          seen = array;

	      if (iteratee) {
	        seen = arrayMap(array, baseUnary(iteratee));
	      }
	      while (++index < length) {
	        var fromIndex = 0,
	            value = values[index],
	            computed = iteratee ? iteratee(value) : value;

	        while ((fromIndex = indexOf(seen, computed, fromIndex, comparator)) > -1) {
	          if (seen !== array) {
	            splice.call(seen, fromIndex, 1);
	          }
	          splice.call(array, fromIndex, 1);
	        }
	      }
	      return array;
	    }

	    /**
	     * The base implementation of `_.pullAt` without support for individual
	     * indexes or capturing the removed elements.
	     *
	     * @private
	     * @param {Array} array The array to modify.
	     * @param {number[]} indexes The indexes of elements to remove.
	     * @returns {Array} Returns `array`.
	     */
	    function basePullAt(array, indexes) {
	      var length = array ? indexes.length : 0,
	          lastIndex = length - 1;

	      while (length--) {
	        var index = indexes[length];
	        if (lastIndex == length || index != previous) {
	          var previous = index;
	          if (isIndex(index)) {
	            splice.call(array, index, 1);
	          }
	          else if (!isKey(index, array)) {
	            var path = castPath(index),
	                object = parent(array, path);

	            if (object != null) {
	              delete object[last(path)];
	            }
	          }
	          else {
	            delete array[index];
	          }
	        }
	      }
	      return array;
	    }

	    /**
	     * The base implementation of `_.random` without support for returning
	     * floating-point numbers.
	     *
	     * @private
	     * @param {number} lower The lower bound.
	     * @param {number} upper The upper bound.
	     * @returns {number} Returns the random number.
	     */
	    function baseRandom(lower, upper) {
	      return lower + nativeFloor(nativeRandom() * (upper - lower + 1));
	    }

	    /**
	     * The base implementation of `_.range` and `_.rangeRight` which doesn't
	     * coerce arguments to numbers.
	     *
	     * @private
	     * @param {number} start The start of the range.
	     * @param {number} end The end of the range.
	     * @param {number} step The value to increment or decrement by.
	     * @param {boolean} [fromRight] Specify iterating from right to left.
	     * @returns {Array} Returns the new array of numbers.
	     */
	    function baseRange(start, end, step, fromRight) {
	      var index = -1,
	          length = nativeMax(nativeCeil((end - start) / (step || 1)), 0),
	          result = Array(length);

	      while (length--) {
	        result[fromRight ? length : ++index] = start;
	        start += step;
	      }
	      return result;
	    }

	    /**
	     * The base implementation of `_.repeat` which doesn't coerce arguments.
	     *
	     * @private
	     * @param {string} string The string to repeat.
	     * @param {number} n The number of times to repeat the string.
	     * @returns {string} Returns the repeated string.
	     */
	    function baseRepeat(string, n) {
	      var result = '';
	      if (!string || n < 1 || n > MAX_SAFE_INTEGER) {
	        return result;
	      }
	      // Leverage the exponentiation by squaring algorithm for a faster repeat.
	      // See https://en.wikipedia.org/wiki/Exponentiation_by_squaring for more details.
	      do {
	        if (n % 2) {
	          result += string;
	        }
	        n = nativeFloor(n / 2);
	        if (n) {
	          string += string;
	        }
	      } while (n);

	      return result;
	    }

	    /**
	     * The base implementation of `_.set`.
	     *
	     * @private
	     * @param {Object} object The object to query.
	     * @param {Array|string} path The path of the property to set.
	     * @param {*} value The value to set.
	     * @param {Function} [customizer] The function to customize path creation.
	     * @returns {Object} Returns `object`.
	     */
	    function baseSet(object, path, value, customizer) {
	      path = isKey(path, object) ? [path] : castPath(path);

	      var index = -1,
	          length = path.length,
	          lastIndex = length - 1,
	          nested = object;

	      while (nested != null && ++index < length) {
	        var key = path[index];
	        if (isObject(nested)) {
	          var newValue = value;
	          if (index != lastIndex) {
	            var objValue = nested[key];
	            newValue = customizer ? customizer(objValue, key, nested) : undefined;
	            if (newValue === undefined) {
	              newValue = objValue == null
	                ? (isIndex(path[index + 1]) ? [] : {})
	                : objValue;
	            }
	          }
	          assignValue(nested, key, newValue);
	        }
	        nested = nested[key];
	      }
	      return object;
	    }

	    /**
	     * The base implementation of `setData` without support for hot loop detection.
	     *
	     * @private
	     * @param {Function} func The function to associate metadata with.
	     * @param {*} data The metadata.
	     * @returns {Function} Returns `func`.
	     */
	    var baseSetData = !metaMap ? identity : function(func, data) {
	      metaMap.set(func, data);
	      return func;
	    };

	    /**
	     * The base implementation of `_.slice` without an iteratee call guard.
	     *
	     * @private
	     * @param {Array} array The array to slice.
	     * @param {number} [start=0] The start position.
	     * @param {number} [end=array.length] The end position.
	     * @returns {Array} Returns the slice of `array`.
	     */
	    function baseSlice(array, start, end) {
	      var index = -1,
	          length = array.length;

	      if (start < 0) {
	        start = -start > length ? 0 : (length + start);
	      }
	      end = end > length ? length : end;
	      if (end < 0) {
	        end += length;
	      }
	      length = start > end ? 0 : ((end - start) >>> 0);
	      start >>>= 0;

	      var result = Array(length);
	      while (++index < length) {
	        result[index] = array[index + start];
	      }
	      return result;
	    }

	    /**
	     * The base implementation of `_.some` without support for iteratee shorthands.
	     *
	     * @private
	     * @param {Array|Object} collection The collection to iterate over.
	     * @param {Function} predicate The function invoked per iteration.
	     * @returns {boolean} Returns `true` if any element passes the predicate check,
	     *  else `false`.
	     */
	    function baseSome(collection, predicate) {
	      var result;

	      baseEach(collection, function(value, index, collection) {
	        result = predicate(value, index, collection);
	        return !result;
	      });
	      return !!result;
	    }

	    /**
	     * The base implementation of `_.sortedIndex` and `_.sortedLastIndex` which
	     * performs a binary search of `array` to determine the index at which `value`
	     * should be inserted into `array` in order to maintain its sort order.
	     *
	     * @private
	     * @param {Array} array The sorted array to inspect.
	     * @param {*} value The value to evaluate.
	     * @param {boolean} [retHighest] Specify returning the highest qualified index.
	     * @returns {number} Returns the index at which `value` should be inserted
	     *  into `array`.
	     */
	    function baseSortedIndex(array, value, retHighest) {
	      var low = 0,
	          high = array ? array.length : low;

	      if (typeof value == 'number' && value === value && high <= HALF_MAX_ARRAY_LENGTH) {
	        while (low < high) {
	          var mid = (low + high) >>> 1,
	              computed = array[mid];

	          if ((retHighest ? (computed <= value) : (computed < value)) && computed !== null) {
	            low = mid + 1;
	          } else {
	            high = mid;
	          }
	        }
	        return high;
	      }
	      return baseSortedIndexBy(array, value, identity, retHighest);
	    }

	    /**
	     * The base implementation of `_.sortedIndexBy` and `_.sortedLastIndexBy`
	     * which invokes `iteratee` for `value` and each element of `array` to compute
	     * their sort ranking. The iteratee is invoked with one argument; (value).
	     *
	     * @private
	     * @param {Array} array The sorted array to inspect.
	     * @param {*} value The value to evaluate.
	     * @param {Function} iteratee The iteratee invoked per element.
	     * @param {boolean} [retHighest] Specify returning the highest qualified index.
	     * @returns {number} Returns the index at which `value` should be inserted
	     *  into `array`.
	     */
	    function baseSortedIndexBy(array, value, iteratee, retHighest) {
	      value = iteratee(value);

	      var low = 0,
	          high = array ? array.length : 0,
	          valIsNaN = value !== value,
	          valIsNull = value === null,
	          valIsUndef = value === undefined;

	      while (low < high) {
	        var mid = nativeFloor((low + high) / 2),
	            computed = iteratee(array[mid]),
	            isDef = computed !== undefined,
	            isReflexive = computed === computed;

	        if (valIsNaN) {
	          var setLow = isReflexive || retHighest;
	        } else if (valIsNull) {
	          setLow = isReflexive && isDef && (retHighest || computed != null);
	        } else if (valIsUndef) {
	          setLow = isReflexive && (retHighest || isDef);
	        } else if (computed == null) {
	          setLow = false;
	        } else {
	          setLow = retHighest ? (computed <= value) : (computed < value);
	        }
	        if (setLow) {
	          low = mid + 1;
	        } else {
	          high = mid;
	        }
	      }
	      return nativeMin(high, MAX_ARRAY_INDEX);
	    }

	    /**
	     * The base implementation of `_.sortedUniq`.
	     *
	     * @private
	     * @param {Array} array The array to inspect.
	     * @returns {Array} Returns the new duplicate free array.
	     */
	    function baseSortedUniq(array) {
	      return baseSortedUniqBy(array);
	    }

	    /**
	     * The base implementation of `_.sortedUniqBy` without support for iteratee
	     * shorthands.
	     *
	     * @private
	     * @param {Array} array The array to inspect.
	     * @param {Function} [iteratee] The iteratee invoked per element.
	     * @returns {Array} Returns the new duplicate free array.
	     */
	    function baseSortedUniqBy(array, iteratee) {
	      var index = 0,
	          length = array.length,
	          value = array[0],
	          computed = iteratee ? iteratee(value) : value,
	          seen = computed,
	          resIndex = 1,
	          result = [value];

	      while (++index < length) {
	        value = array[index],
	        computed = iteratee ? iteratee(value) : value;

	        if (!eq(computed, seen)) {
	          seen = computed;
	          result[resIndex++] = value;
	        }
	      }
	      return result;
	    }

	    /**
	     * The base implementation of `_.uniqBy` without support for iteratee shorthands.
	     *
	     * @private
	     * @param {Array} array The array to inspect.
	     * @param {Function} [iteratee] The iteratee invoked per element.
	     * @param {Function} [comparator] The comparator invoked per element.
	     * @returns {Array} Returns the new duplicate free array.
	     */
	    function baseUniq(array, iteratee, comparator) {
	      var index = -1,
	          includes = arrayIncludes,
	          length = array.length,
	          isCommon = true,
	          result = [],
	          seen = result;

	      if (comparator) {
	        isCommon = false;
	        includes = arrayIncludesWith;
	      }
	      else if (length >= LARGE_ARRAY_SIZE) {
	        var set = iteratee ? null : createSet(array);
	        if (set) {
	          return setToArray(set);
	        }
	        isCommon = false;
	        includes = cacheHas;
	        seen = new SetCache;
	      }
	      else {
	        seen = iteratee ? [] : result;
	      }
	      outer:
	      while (++index < length) {
	        var value = array[index],
	            computed = iteratee ? iteratee(value) : value;

	        if (isCommon && computed === computed) {
	          var seenIndex = seen.length;
	          while (seenIndex--) {
	            if (seen[seenIndex] === computed) {
	              continue outer;
	            }
	          }
	          if (iteratee) {
	            seen.push(computed);
	          }
	          result.push(value);
	        }
	        else if (!includes(seen, computed, comparator)) {
	          if (seen !== result) {
	            seen.push(computed);
	          }
	          result.push(value);
	        }
	      }
	      return result;
	    }

	    /**
	     * The base implementation of `_.unset`.
	     *
	     * @private
	     * @param {Object} object The object to modify.
	     * @param {Array|string} path The path of the property to unset.
	     * @returns {boolean} Returns `true` if the property is deleted, else `false`.
	     */
	    function baseUnset(object, path) {
	      path = isKey(path, object) ? [path] : castPath(path);
	      object = parent(object, path);
	      var key = last(path);
	      return (object != null && has(object, key)) ? delete object[key] : true;
	    }

	    /**
	     * The base implementation of `_.update`.
	     *
	     * @private
	     * @param {Object} object The object to query.
	     * @param {Array|string} path The path of the property to update.
	     * @param {Function} updater The function to produce the updated value.
	     * @param {Function} [customizer] The function to customize path creation.
	     * @returns {Object} Returns `object`.
	     */
	    function baseUpdate(object, path, updater, customizer) {
	      return baseSet(object, path, updater(baseGet(object, path)), customizer);
	    }

	    /**
	     * The base implementation of methods like `_.dropWhile` and `_.takeWhile`
	     * without support for iteratee shorthands.
	     *
	     * @private
	     * @param {Array} array The array to query.
	     * @param {Function} predicate The function invoked per iteration.
	     * @param {boolean} [isDrop] Specify dropping elements instead of taking them.
	     * @param {boolean} [fromRight] Specify iterating from right to left.
	     * @returns {Array} Returns the slice of `array`.
	     */
	    function baseWhile(array, predicate, isDrop, fromRight) {
	      var length = array.length,
	          index = fromRight ? length : -1;

	      while ((fromRight ? index-- : ++index < length) &&
	        predicate(array[index], index, array)) {}

	      return isDrop
	        ? baseSlice(array, (fromRight ? 0 : index), (fromRight ? index + 1 : length))
	        : baseSlice(array, (fromRight ? index + 1 : 0), (fromRight ? length : index));
	    }

	    /**
	     * The base implementation of `wrapperValue` which returns the result of
	     * performing a sequence of actions on the unwrapped `value`, where each
	     * successive action is supplied the return value of the previous.
	     *
	     * @private
	     * @param {*} value The unwrapped value.
	     * @param {Array} actions Actions to perform to resolve the unwrapped value.
	     * @returns {*} Returns the resolved value.
	     */
	    function baseWrapperValue(value, actions) {
	      var result = value;
	      if (result instanceof LazyWrapper) {
	        result = result.value();
	      }
	      return arrayReduce(actions, function(result, action) {
	        return action.func.apply(action.thisArg, arrayPush([result], action.args));
	      }, result);
	    }

	    /**
	     * The base implementation of methods like `_.xor`, without support for
	     * iteratee shorthands, that accepts an array of arrays to inspect.
	     *
	     * @private
	     * @param {Array} arrays The arrays to inspect.
	     * @param {Function} [iteratee] The iteratee invoked per element.
	     * @param {Function} [comparator] The comparator invoked per element.
	     * @returns {Array} Returns the new array of values.
	     */
	    function baseXor(arrays, iteratee, comparator) {
	      var index = -1,
	          length = arrays.length;

	      while (++index < length) {
	        var result = result
	          ? arrayPush(
	              baseDifference(result, arrays[index], iteratee, comparator),
	              baseDifference(arrays[index], result, iteratee, comparator)
	            )
	          : arrays[index];
	      }
	      return (result && result.length) ? baseUniq(result, iteratee, comparator) : [];
	    }

	    /**
	     * This base implementation of `_.zipObject` which assigns values using `assignFunc`.
	     *
	     * @private
	     * @param {Array} props The property identifiers.
	     * @param {Array} values The property values.
	     * @param {Function} assignFunc The function to assign values.
	     * @returns {Object} Returns the new object.
	     */
	    function baseZipObject(props, values, assignFunc) {
	      var index = -1,
	          length = props.length,
	          valsLength = values.length,
	          result = {};

	      while (++index < length) {
	        var value = index < valsLength ? values[index] : undefined;
	        assignFunc(result, props[index], value);
	      }
	      return result;
	    }

	    /**
	     * Casts `value` to an empty array if it's not an array like object.
	     *
	     * @private
	     * @param {*} value The value to inspect.
	     * @returns {Array|Object} Returns the cast array-like object.
	     */
	    function castArrayLikeObject(value) {
	      return isArrayLikeObject(value) ? value : [];
	    }

	    /**
	     * Casts `value` to `identity` if it's not a function.
	     *
	     * @private
	     * @param {*} value The value to inspect.
	     * @returns {Function} Returns cast function.
	     */
	    function castFunction(value) {
	      return typeof value == 'function' ? value : identity;
	    }

	    /**
	     * Casts `value` to a path array if it's not one.
	     *
	     * @private
	     * @param {*} value The value to inspect.
	     * @returns {Array} Returns the cast property path array.
	     */
	    function castPath(value) {
	      return isArray(value) ? value : stringToPath(value);
	    }

	    /**
	     * Casts `array` to a slice if it's needed.
	     *
	     * @private
	     * @param {Array} array The array to inspect.
	     * @param {number} start The start position.
	     * @param {number} [end=array.length] The end position.
	     * @returns {Array} Returns the cast slice.
	     */
	    function castSlice(array, start, end) {
	      var length = array.length;
	      end = end === undefined ? length : end;
	      return (!start && end >= length) ? array : baseSlice(array, start, end);
	    }

	    /**
	     * Creates a clone of  `buffer`.
	     *
	     * @private
	     * @param {Buffer} buffer The buffer to clone.
	     * @param {boolean} [isDeep] Specify a deep clone.
	     * @returns {Buffer} Returns the cloned buffer.
	     */
	    function cloneBuffer(buffer, isDeep) {
	      if (isDeep) {
	        return buffer.slice();
	      }
	      var result = new buffer.constructor(buffer.length);
	      buffer.copy(result);
	      return result;
	    }

	    /**
	     * Creates a clone of `arrayBuffer`.
	     *
	     * @private
	     * @param {ArrayBuffer} arrayBuffer The array buffer to clone.
	     * @returns {ArrayBuffer} Returns the cloned array buffer.
	     */
	    function cloneArrayBuffer(arrayBuffer) {
	      var result = new arrayBuffer.constructor(arrayBuffer.byteLength);
	      new Uint8Array(result).set(new Uint8Array(arrayBuffer));
	      return result;
	    }

	    /**
	     * Creates a clone of `dataView`.
	     *
	     * @private
	     * @param {Object} dataView The data view to clone.
	     * @param {boolean} [isDeep] Specify a deep clone.
	     * @returns {Object} Returns the cloned data view.
	     */
	    function cloneDataView(dataView, isDeep) {
	      var buffer = isDeep ? cloneArrayBuffer(dataView.buffer) : dataView.buffer;
	      return new dataView.constructor(buffer, dataView.byteOffset, dataView.byteLength);
	    }

	    /**
	     * Creates a clone of `map`.
	     *
	     * @private
	     * @param {Object} map The map to clone.
	     * @param {Function} cloneFunc The function to clone values.
	     * @param {boolean} [isDeep] Specify a deep clone.
	     * @returns {Object} Returns the cloned map.
	     */
	    function cloneMap(map, isDeep, cloneFunc) {
	      var array = isDeep ? cloneFunc(mapToArray(map), true) : mapToArray(map);
	      return arrayReduce(array, addMapEntry, new map.constructor);
	    }

	    /**
	     * Creates a clone of `regexp`.
	     *
	     * @private
	     * @param {Object} regexp The regexp to clone.
	     * @returns {Object} Returns the cloned regexp.
	     */
	    function cloneRegExp(regexp) {
	      var result = new regexp.constructor(regexp.source, reFlags.exec(regexp));
	      result.lastIndex = regexp.lastIndex;
	      return result;
	    }

	    /**
	     * Creates a clone of `set`.
	     *
	     * @private
	     * @param {Object} set The set to clone.
	     * @param {Function} cloneFunc The function to clone values.
	     * @param {boolean} [isDeep] Specify a deep clone.
	     * @returns {Object} Returns the cloned set.
	     */
	    function cloneSet(set, isDeep, cloneFunc) {
	      var array = isDeep ? cloneFunc(setToArray(set), true) : setToArray(set);
	      return arrayReduce(array, addSetEntry, new set.constructor);
	    }

	    /**
	     * Creates a clone of the `symbol` object.
	     *
	     * @private
	     * @param {Object} symbol The symbol object to clone.
	     * @returns {Object} Returns the cloned symbol object.
	     */
	    function cloneSymbol(symbol) {
	      return symbolValueOf ? Object(symbolValueOf.call(symbol)) : {};
	    }

	    /**
	     * Creates a clone of `typedArray`.
	     *
	     * @private
	     * @param {Object} typedArray The typed array to clone.
	     * @param {boolean} [isDeep] Specify a deep clone.
	     * @returns {Object} Returns the cloned typed array.
	     */
	    function cloneTypedArray(typedArray, isDeep) {
	      var buffer = isDeep ? cloneArrayBuffer(typedArray.buffer) : typedArray.buffer;
	      return new typedArray.constructor(buffer, typedArray.byteOffset, typedArray.length);
	    }

	    /**
	     * Creates an array that is the composition of partially applied arguments,
	     * placeholders, and provided arguments into a single array of arguments.
	     *
	     * @private
	     * @param {Array|Object} args The provided arguments.
	     * @param {Array} partials The arguments to prepend to those provided.
	     * @param {Array} holders The `partials` placeholder indexes.
	     * @params {boolean} [isCurried] Specify composing for a curried function.
	     * @returns {Array} Returns the new array of composed arguments.
	     */
	    function composeArgs(args, partials, holders, isCurried) {
	      var argsIndex = -1,
	          argsLength = args.length,
	          holdersLength = holders.length,
	          leftIndex = -1,
	          leftLength = partials.length,
	          rangeLength = nativeMax(argsLength - holdersLength, 0),
	          result = Array(leftLength + rangeLength),
	          isUncurried = !isCurried;

	      while (++leftIndex < leftLength) {
	        result[leftIndex] = partials[leftIndex];
	      }
	      while (++argsIndex < holdersLength) {
	        if (isUncurried || argsIndex < argsLength) {
	          result[holders[argsIndex]] = args[argsIndex];
	        }
	      }
	      while (rangeLength--) {
	        result[leftIndex++] = args[argsIndex++];
	      }
	      return result;
	    }

	    /**
	     * This function is like `composeArgs` except that the arguments composition
	     * is tailored for `_.partialRight`.
	     *
	     * @private
	     * @param {Array|Object} args The provided arguments.
	     * @param {Array} partials The arguments to append to those provided.
	     * @param {Array} holders The `partials` placeholder indexes.
	     * @params {boolean} [isCurried] Specify composing for a curried function.
	     * @returns {Array} Returns the new array of composed arguments.
	     */
	    function composeArgsRight(args, partials, holders, isCurried) {
	      var argsIndex = -1,
	          argsLength = args.length,
	          holdersIndex = -1,
	          holdersLength = holders.length,
	          rightIndex = -1,
	          rightLength = partials.length,
	          rangeLength = nativeMax(argsLength - holdersLength, 0),
	          result = Array(rangeLength + rightLength),
	          isUncurried = !isCurried;

	      while (++argsIndex < rangeLength) {
	        result[argsIndex] = args[argsIndex];
	      }
	      var offset = argsIndex;
	      while (++rightIndex < rightLength) {
	        result[offset + rightIndex] = partials[rightIndex];
	      }
	      while (++holdersIndex < holdersLength) {
	        if (isUncurried || argsIndex < argsLength) {
	          result[offset + holders[holdersIndex]] = args[argsIndex++];
	        }
	      }
	      return result;
	    }

	    /**
	     * Copies the values of `source` to `array`.
	     *
	     * @private
	     * @param {Array} source The array to copy values from.
	     * @param {Array} [array=[]] The array to copy values to.
	     * @returns {Array} Returns `array`.
	     */
	    function copyArray(source, array) {
	      var index = -1,
	          length = source.length;

	      array || (array = Array(length));
	      while (++index < length) {
	        array[index] = source[index];
	      }
	      return array;
	    }

	    /**
	     * Copies properties of `source` to `object`.
	     *
	     * @private
	     * @param {Object} source The object to copy properties from.
	     * @param {Array} props The property identifiers to copy.
	     * @param {Object} [object={}] The object to copy properties to.
	     * @param {Function} [customizer] The function to customize copied values.
	     * @returns {Object} Returns `object`.
	     */
	    function copyObject(source, props, object, customizer) {
	      object || (object = {});

	      var index = -1,
	          length = props.length;

	      while (++index < length) {
	        var key = props[index];

	        var newValue = customizer
	          ? customizer(object[key], source[key], key, object, source)
	          : source[key];

	        assignValue(object, key, newValue);
	      }
	      return object;
	    }

	    /**
	     * Copies own symbol properties of `source` to `object`.
	     *
	     * @private
	     * @param {Object} source The object to copy symbols from.
	     * @param {Object} [object={}] The object to copy symbols to.
	     * @returns {Object} Returns `object`.
	     */
	    function copySymbols(source, object) {
	      return copyObject(source, getSymbols(source), object);
	    }

	    /**
	     * Creates a function like `_.groupBy`.
	     *
	     * @private
	     * @param {Function} setter The function to set accumulator values.
	     * @param {Function} [initializer] The accumulator object initializer.
	     * @returns {Function} Returns the new aggregator function.
	     */
	    function createAggregator(setter, initializer) {
	      return function(collection, iteratee) {
	        var func = isArray(collection) ? arrayAggregator : baseAggregator,
	            accumulator = initializer ? initializer() : {};

	        return func(collection, setter, getIteratee(iteratee), accumulator);
	      };
	    }

	    /**
	     * Creates a function like `_.assign`.
	     *
	     * @private
	     * @param {Function} assigner The function to assign values.
	     * @returns {Function} Returns the new assigner function.
	     */
	    function createAssigner(assigner) {
	      return rest(function(object, sources) {
	        var index = -1,
	            length = sources.length,
	            customizer = length > 1 ? sources[length - 1] : undefined,
	            guard = length > 2 ? sources[2] : undefined;

	        customizer = typeof customizer == 'function'
	          ? (length--, customizer)
	          : undefined;

	        if (guard && isIterateeCall(sources[0], sources[1], guard)) {
	          customizer = length < 3 ? undefined : customizer;
	          length = 1;
	        }
	        object = Object(object);
	        while (++index < length) {
	          var source = sources[index];
	          if (source) {
	            assigner(object, source, index, customizer);
	          }
	        }
	        return object;
	      });
	    }

	    /**
	     * Creates a `baseEach` or `baseEachRight` function.
	     *
	     * @private
	     * @param {Function} eachFunc The function to iterate over a collection.
	     * @param {boolean} [fromRight] Specify iterating from right to left.
	     * @returns {Function} Returns the new base function.
	     */
	    function createBaseEach(eachFunc, fromRight) {
	      return function(collection, iteratee) {
	        if (collection == null) {
	          return collection;
	        }
	        if (!isArrayLike(collection)) {
	          return eachFunc(collection, iteratee);
	        }
	        var length = collection.length,
	            index = fromRight ? length : -1,
	            iterable = Object(collection);

	        while ((fromRight ? index-- : ++index < length)) {
	          if (iteratee(iterable[index], index, iterable) === false) {
	            break;
	          }
	        }
	        return collection;
	      };
	    }

	    /**
	     * Creates a base function for methods like `_.forIn` and `_.forOwn`.
	     *
	     * @private
	     * @param {boolean} [fromRight] Specify iterating from right to left.
	     * @returns {Function} Returns the new base function.
	     */
	    function createBaseFor(fromRight) {
	      return function(object, iteratee, keysFunc) {
	        var index = -1,
	            iterable = Object(object),
	            props = keysFunc(object),
	            length = props.length;

	        while (length--) {
	          var key = props[fromRight ? length : ++index];
	          if (iteratee(iterable[key], key, iterable) === false) {
	            break;
	          }
	        }
	        return object;
	      };
	    }

	    /**
	     * Creates a function that wraps `func` to invoke it with the optional `this`
	     * binding of `thisArg`.
	     *
	     * @private
	     * @param {Function} func The function to wrap.
	     * @param {number} bitmask The bitmask of wrapper flags. See `createWrapper`
	     *  for more details.
	     * @param {*} [thisArg] The `this` binding of `func`.
	     * @returns {Function} Returns the new wrapped function.
	     */
	    function createBaseWrapper(func, bitmask, thisArg) {
	      var isBind = bitmask & BIND_FLAG,
	          Ctor = createCtorWrapper(func);

	      function wrapper() {
	        var fn = (this && this !== root && this instanceof wrapper) ? Ctor : func;
	        return fn.apply(isBind ? thisArg : this, arguments);
	      }
	      return wrapper;
	    }

	    /**
	     * Creates a function like `_.lowerFirst`.
	     *
	     * @private
	     * @param {string} methodName The name of the `String` case method to use.
	     * @returns {Function} Returns the new function.
	     */
	    function createCaseFirst(methodName) {
	      return function(string) {
	        string = toString(string);

	        var strSymbols = reHasComplexSymbol.test(string)
	          ? stringToArray(string)
	          : undefined;

	        var chr = strSymbols
	          ? strSymbols[0]
	          : string.charAt(0);

	        var trailing = strSymbols
	          ? castSlice(strSymbols, 1).join('')
	          : string.slice(1);

	        return chr[methodName]() + trailing;
	      };
	    }

	    /**
	     * Creates a function like `_.camelCase`.
	     *
	     * @private
	     * @param {Function} callback The function to combine each word.
	     * @returns {Function} Returns the new compounder function.
	     */
	    function createCompounder(callback) {
	      return function(string) {
	        return arrayReduce(words(deburr(string).replace(reApos, '')), callback, '');
	      };
	    }

	    /**
	     * Creates a function that produces an instance of `Ctor` regardless of
	     * whether it was invoked as part of a `new` expression or by `call` or `apply`.
	     *
	     * @private
	     * @param {Function} Ctor The constructor to wrap.
	     * @returns {Function} Returns the new wrapped function.
	     */
	    function createCtorWrapper(Ctor) {
	      return function() {
	        // Use a `switch` statement to work with class constructors. See
	        // http://ecma-international.org/ecma-262/6.0/#sec-ecmascript-function-objects-call-thisargument-argumentslist
	        // for more details.
	        var args = arguments;
	        switch (args.length) {
	          case 0: return new Ctor;
	          case 1: return new Ctor(args[0]);
	          case 2: return new Ctor(args[0], args[1]);
	          case 3: return new Ctor(args[0], args[1], args[2]);
	          case 4: return new Ctor(args[0], args[1], args[2], args[3]);
	          case 5: return new Ctor(args[0], args[1], args[2], args[3], args[4]);
	          case 6: return new Ctor(args[0], args[1], args[2], args[3], args[4], args[5]);
	          case 7: return new Ctor(args[0], args[1], args[2], args[3], args[4], args[5], args[6]);
	        }
	        var thisBinding = baseCreate(Ctor.prototype),
	            result = Ctor.apply(thisBinding, args);

	        // Mimic the constructor's `return` behavior.
	        // See https://es5.github.io/#x13.2.2 for more details.
	        return isObject(result) ? result : thisBinding;
	      };
	    }

	    /**
	     * Creates a function that wraps `func` to enable currying.
	     *
	     * @private
	     * @param {Function} func The function to wrap.
	     * @param {number} bitmask The bitmask of wrapper flags. See `createWrapper`
	     *  for more details.
	     * @param {number} arity The arity of `func`.
	     * @returns {Function} Returns the new wrapped function.
	     */
	    function createCurryWrapper(func, bitmask, arity) {
	      var Ctor = createCtorWrapper(func);

	      function wrapper() {
	        var length = arguments.length,
	            args = Array(length),
	            index = length,
	            placeholder = getPlaceholder(wrapper);

	        while (index--) {
	          args[index] = arguments[index];
	        }
	        var holders = (length < 3 && args[0] !== placeholder && args[length - 1] !== placeholder)
	          ? []
	          : replaceHolders(args, placeholder);

	        length -= holders.length;
	        if (length < arity) {
	          return createRecurryWrapper(
	            func, bitmask, createHybridWrapper, wrapper.placeholder, undefined,
	            args, holders, undefined, undefined, arity - length);
	        }
	        var fn = (this && this !== root && this instanceof wrapper) ? Ctor : func;
	        return apply(fn, this, args);
	      }
	      return wrapper;
	    }

	    /**
	     * Creates a `_.flow` or `_.flowRight` function.
	     *
	     * @private
	     * @param {boolean} [fromRight] Specify iterating from right to left.
	     * @returns {Function} Returns the new flow function.
	     */
	    function createFlow(fromRight) {
	      return rest(function(funcs) {
	        funcs = baseFlatten(funcs, 1);

	        var length = funcs.length,
	            index = length,
	            prereq = LodashWrapper.prototype.thru;

	        if (fromRight) {
	          funcs.reverse();
	        }
	        while (index--) {
	          var func = funcs[index];
	          if (typeof func != 'function') {
	            throw new TypeError(FUNC_ERROR_TEXT);
	          }
	          if (prereq && !wrapper && getFuncName(func) == 'wrapper') {
	            var wrapper = new LodashWrapper([], true);
	          }
	        }
	        index = wrapper ? index : length;
	        while (++index < length) {
	          func = funcs[index];

	          var funcName = getFuncName(func),
	              data = funcName == 'wrapper' ? getData(func) : undefined;

	          if (data && isLaziable(data[0]) &&
	                data[1] == (ARY_FLAG | CURRY_FLAG | PARTIAL_FLAG | REARG_FLAG) &&
	                !data[4].length && data[9] == 1
	              ) {
	            wrapper = wrapper[getFuncName(data[0])].apply(wrapper, data[3]);
	          } else {
	            wrapper = (func.length == 1 && isLaziable(func))
	              ? wrapper[funcName]()
	              : wrapper.thru(func);
	          }
	        }
	        return function() {
	          var args = arguments,
	              value = args[0];

	          if (wrapper && args.length == 1 &&
	              isArray(value) && value.length >= LARGE_ARRAY_SIZE) {
	            return wrapper.plant(value).value();
	          }
	          var index = 0,
	              result = length ? funcs[index].apply(this, args) : value;

	          while (++index < length) {
	            result = funcs[index].call(this, result);
	          }
	          return result;
	        };
	      });
	    }

	    /**
	     * Creates a function that wraps `func` to invoke it with optional `this`
	     * binding of `thisArg`, partial application, and currying.
	     *
	     * @private
	     * @param {Function|string} func The function or method name to wrap.
	     * @param {number} bitmask The bitmask of wrapper flags. See `createWrapper`
	     *  for more details.
	     * @param {*} [thisArg] The `this` binding of `func`.
	     * @param {Array} [partials] The arguments to prepend to those provided to
	     *  the new function.
	     * @param {Array} [holders] The `partials` placeholder indexes.
	     * @param {Array} [partialsRight] The arguments to append to those provided
	     *  to the new function.
	     * @param {Array} [holdersRight] The `partialsRight` placeholder indexes.
	     * @param {Array} [argPos] The argument positions of the new function.
	     * @param {number} [ary] The arity cap of `func`.
	     * @param {number} [arity] The arity of `func`.
	     * @returns {Function} Returns the new wrapped function.
	     */
	    function createHybridWrapper(func, bitmask, thisArg, partials, holders, partialsRight, holdersRight, argPos, ary, arity) {
	      var isAry = bitmask & ARY_FLAG,
	          isBind = bitmask & BIND_FLAG,
	          isBindKey = bitmask & BIND_KEY_FLAG,
	          isCurried = bitmask & (CURRY_FLAG | CURRY_RIGHT_FLAG),
	          isFlip = bitmask & FLIP_FLAG,
	          Ctor = isBindKey ? undefined : createCtorWrapper(func);

	      function wrapper() {
	        var length = arguments.length,
	            index = length,
	            args = Array(length);

	        while (index--) {
	          args[index] = arguments[index];
	        }
	        if (isCurried) {
	          var placeholder = getPlaceholder(wrapper),
	              holdersCount = countHolders(args, placeholder);
	        }
	        if (partials) {
	          args = composeArgs(args, partials, holders, isCurried);
	        }
	        if (partialsRight) {
	          args = composeArgsRight(args, partialsRight, holdersRight, isCurried);
	        }
	        length -= holdersCount;
	        if (isCurried && length < arity) {
	          var newHolders = replaceHolders(args, placeholder);
	          return createRecurryWrapper(
	            func, bitmask, createHybridWrapper, wrapper.placeholder, thisArg,
	            args, newHolders, argPos, ary, arity - length
	          );
	        }
	        var thisBinding = isBind ? thisArg : this,
	            fn = isBindKey ? thisBinding[func] : func;

	        length = args.length;
	        if (argPos) {
	          args = reorder(args, argPos);
	        } else if (isFlip && length > 1) {
	          args.reverse();
	        }
	        if (isAry && ary < length) {
	          args.length = ary;
	        }
	        if (this && this !== root && this instanceof wrapper) {
	          fn = Ctor || createCtorWrapper(fn);
	        }
	        return fn.apply(thisBinding, args);
	      }
	      return wrapper;
	    }

	    /**
	     * Creates a function like `_.invertBy`.
	     *
	     * @private
	     * @param {Function} setter The function to set accumulator values.
	     * @param {Function} toIteratee The function to resolve iteratees.
	     * @returns {Function} Returns the new inverter function.
	     */
	    function createInverter(setter, toIteratee) {
	      return function(object, iteratee) {
	        return baseInverter(object, setter, toIteratee(iteratee), {});
	      };
	    }

	    /**
	     * Creates a function like `_.over`.
	     *
	     * @private
	     * @param {Function} arrayFunc The function to iterate over iteratees.
	     * @returns {Function} Returns the new invoker function.
	     */
	    function createOver(arrayFunc) {
	      return rest(function(iteratees) {
	        iteratees = (iteratees.length == 1 && isArray(iteratees[0]))
	          ? arrayMap(iteratees[0], baseUnary(getIteratee()))
	          : arrayMap(baseFlatten(iteratees, 1, isFlattenableIteratee), baseUnary(getIteratee()));

	        return rest(function(args) {
	          var thisArg = this;
	          return arrayFunc(iteratees, function(iteratee) {
	            return apply(iteratee, thisArg, args);
	          });
	        });
	      });
	    }

	    /**
	     * Creates the padding for `string` based on `length`. The `chars` string
	     * is truncated if the number of characters exceeds `length`.
	     *
	     * @private
	     * @param {number} length The padding length.
	     * @param {string} [chars=' '] The string used as padding.
	     * @returns {string} Returns the padding for `string`.
	     */
	    function createPadding(length, chars) {
	      chars = chars === undefined ? ' ' : (chars + '');

	      var charsLength = chars.length;
	      if (charsLength < 2) {
	        return charsLength ? baseRepeat(chars, length) : chars;
	      }
	      var result = baseRepeat(chars, nativeCeil(length / stringSize(chars)));
	      return reHasComplexSymbol.test(chars)
	        ? castSlice(stringToArray(result), 0, length).join('')
	        : result.slice(0, length);
	    }

	    /**
	     * Creates a function that wraps `func` to invoke it with the `this` binding
	     * of `thisArg` and `partials` prepended to the arguments it receives.
	     *
	     * @private
	     * @param {Function} func The function to wrap.
	     * @param {number} bitmask The bitmask of wrapper flags. See `createWrapper`
	     *  for more details.
	     * @param {*} thisArg The `this` binding of `func`.
	     * @param {Array} partials The arguments to prepend to those provided to
	     *  the new function.
	     * @returns {Function} Returns the new wrapped function.
	     */
	    function createPartialWrapper(func, bitmask, thisArg, partials) {
	      var isBind = bitmask & BIND_FLAG,
	          Ctor = createCtorWrapper(func);

	      function wrapper() {
	        var argsIndex = -1,
	            argsLength = arguments.length,
	            leftIndex = -1,
	            leftLength = partials.length,
	            args = Array(leftLength + argsLength),
	            fn = (this && this !== root && this instanceof wrapper) ? Ctor : func;

	        while (++leftIndex < leftLength) {
	          args[leftIndex] = partials[leftIndex];
	        }
	        while (argsLength--) {
	          args[leftIndex++] = arguments[++argsIndex];
	        }
	        return apply(fn, isBind ? thisArg : this, args);
	      }
	      return wrapper;
	    }

	    /**
	     * Creates a `_.range` or `_.rangeRight` function.
	     *
	     * @private
	     * @param {boolean} [fromRight] Specify iterating from right to left.
	     * @returns {Function} Returns the new range function.
	     */
	    function createRange(fromRight) {
	      return function(start, end, step) {
	        if (step && typeof step != 'number' && isIterateeCall(start, end, step)) {
	          end = step = undefined;
	        }
	        // Ensure the sign of `-0` is preserved.
	        start = toNumber(start);
	        start = start === start ? start : 0;
	        if (end === undefined) {
	          end = start;
	          start = 0;
	        } else {
	          end = toNumber(end) || 0;
	        }
	        step = step === undefined ? (start < end ? 1 : -1) : (toNumber(step) || 0);
	        return baseRange(start, end, step, fromRight);
	      };
	    }

	    /**
	     * Creates a function that wraps `func` to continue currying.
	     *
	     * @private
	     * @param {Function} func The function to wrap.
	     * @param {number} bitmask The bitmask of wrapper flags. See `createWrapper`
	     *  for more details.
	     * @param {Function} wrapFunc The function to create the `func` wrapper.
	     * @param {*} placeholder The placeholder value.
	     * @param {*} [thisArg] The `this` binding of `func`.
	     * @param {Array} [partials] The arguments to prepend to those provided to
	     *  the new function.
	     * @param {Array} [holders] The `partials` placeholder indexes.
	     * @param {Array} [argPos] The argument positions of the new function.
	     * @param {number} [ary] The arity cap of `func`.
	     * @param {number} [arity] The arity of `func`.
	     * @returns {Function} Returns the new wrapped function.
	     */
	    function createRecurryWrapper(func, bitmask, wrapFunc, placeholder, thisArg, partials, holders, argPos, ary, arity) {
	      var isCurry = bitmask & CURRY_FLAG,
	          newHolders = isCurry ? holders : undefined,
	          newHoldersRight = isCurry ? undefined : holders,
	          newPartials = isCurry ? partials : undefined,
	          newPartialsRight = isCurry ? undefined : partials;

	      bitmask |= (isCurry ? PARTIAL_FLAG : PARTIAL_RIGHT_FLAG);
	      bitmask &= ~(isCurry ? PARTIAL_RIGHT_FLAG : PARTIAL_FLAG);

	      if (!(bitmask & CURRY_BOUND_FLAG)) {
	        bitmask &= ~(BIND_FLAG | BIND_KEY_FLAG);
	      }
	      var newData = [
	        func, bitmask, thisArg, newPartials, newHolders, newPartialsRight,
	        newHoldersRight, argPos, ary, arity
	      ];

	      var result = wrapFunc.apply(undefined, newData);
	      if (isLaziable(func)) {
	        setData(result, newData);
	      }
	      result.placeholder = placeholder;
	      return result;
	    }

	    /**
	     * Creates a function like `_.round`.
	     *
	     * @private
	     * @param {string} methodName The name of the `Math` method to use when rounding.
	     * @returns {Function} Returns the new round function.
	     */
	    function createRound(methodName) {
	      var func = Math[methodName];
	      return function(number, precision) {
	        number = toNumber(number);
	        precision = toInteger(precision);
	        if (precision) {
	          // Shift with exponential notation to avoid floating-point issues.
	          // See [MDN](https://mdn.io/round#Examples) for more details.
	          var pair = (toString(number) + 'e').split('e'),
	              value = func(pair[0] + 'e' + (+pair[1] + precision));

	          pair = (toString(value) + 'e').split('e');
	          return +(pair[0] + 'e' + (+pair[1] - precision));
	        }
	        return func(number);
	      };
	    }

	    /**
	     * Creates a set of `values`.
	     *
	     * @private
	     * @param {Array} values The values to add to the set.
	     * @returns {Object} Returns the new set.
	     */
	    var createSet = !(Set && new Set([1, 2]).size === 2) ? noop : function(values) {
	      return new Set(values);
	    };

	    /**
	     * Creates a function that either curries or invokes `func` with optional
	     * `this` binding and partially applied arguments.
	     *
	     * @private
	     * @param {Function|string} func The function or method name to wrap.
	     * @param {number} bitmask The bitmask of wrapper flags.
	     *  The bitmask may be composed of the following flags:
	     *     1 - `_.bind`
	     *     2 - `_.bindKey`
	     *     4 - `_.curry` or `_.curryRight` of a bound function
	     *     8 - `_.curry`
	     *    16 - `_.curryRight`
	     *    32 - `_.partial`
	     *    64 - `_.partialRight`
	     *   128 - `_.rearg`
	     *   256 - `_.ary`
	     * @param {*} [thisArg] The `this` binding of `func`.
	     * @param {Array} [partials] The arguments to be partially applied.
	     * @param {Array} [holders] The `partials` placeholder indexes.
	     * @param {Array} [argPos] The argument positions of the new function.
	     * @param {number} [ary] The arity cap of `func`.
	     * @param {number} [arity] The arity of `func`.
	     * @returns {Function} Returns the new wrapped function.
	     */
	    function createWrapper(func, bitmask, thisArg, partials, holders, argPos, ary, arity) {
	      var isBindKey = bitmask & BIND_KEY_FLAG;
	      if (!isBindKey && typeof func != 'function') {
	        throw new TypeError(FUNC_ERROR_TEXT);
	      }
	      var length = partials ? partials.length : 0;
	      if (!length) {
	        bitmask &= ~(PARTIAL_FLAG | PARTIAL_RIGHT_FLAG);
	        partials = holders = undefined;
	      }
	      ary = ary === undefined ? ary : nativeMax(toInteger(ary), 0);
	      arity = arity === undefined ? arity : toInteger(arity);
	      length -= holders ? holders.length : 0;

	      if (bitmask & PARTIAL_RIGHT_FLAG) {
	        var partialsRight = partials,
	            holdersRight = holders;

	        partials = holders = undefined;
	      }
	      var data = isBindKey ? undefined : getData(func);

	      var newData = [
	        func, bitmask, thisArg, partials, holders, partialsRight, holdersRight,
	        argPos, ary, arity
	      ];

	      if (data) {
	        mergeData(newData, data);
	      }
	      func = newData[0];
	      bitmask = newData[1];
	      thisArg = newData[2];
	      partials = newData[3];
	      holders = newData[4];
	      arity = newData[9] = newData[9] == null
	        ? (isBindKey ? 0 : func.length)
	        : nativeMax(newData[9] - length, 0);

	      if (!arity && bitmask & (CURRY_FLAG | CURRY_RIGHT_FLAG)) {
	        bitmask &= ~(CURRY_FLAG | CURRY_RIGHT_FLAG);
	      }
	      if (!bitmask || bitmask == BIND_FLAG) {
	        var result = createBaseWrapper(func, bitmask, thisArg);
	      } else if (bitmask == CURRY_FLAG || bitmask == CURRY_RIGHT_FLAG) {
	        result = createCurryWrapper(func, bitmask, arity);
	      } else if ((bitmask == PARTIAL_FLAG || bitmask == (BIND_FLAG | PARTIAL_FLAG)) && !holders.length) {
	        result = createPartialWrapper(func, bitmask, thisArg, partials);
	      } else {
	        result = createHybridWrapper.apply(undefined, newData);
	      }
	      var setter = data ? baseSetData : setData;
	      return setter(result, newData);
	    }

	    /**
	     * A specialized version of `baseIsEqualDeep` for arrays with support for
	     * partial deep comparisons.
	     *
	     * @private
	     * @param {Array} array The array to compare.
	     * @param {Array} other The other array to compare.
	     * @param {Function} equalFunc The function to determine equivalents of values.
	     * @param {Function} customizer The function to customize comparisons.
	     * @param {number} bitmask The bitmask of comparison flags. See `baseIsEqual`
	     *  for more details.
	     * @param {Object} stack Tracks traversed `array` and `other` objects.
	     * @returns {boolean} Returns `true` if the arrays are equivalent, else `false`.
	     */
	    function equalArrays(array, other, equalFunc, customizer, bitmask, stack) {
	      var index = -1,
	          isPartial = bitmask & PARTIAL_COMPARE_FLAG,
	          isUnordered = bitmask & UNORDERED_COMPARE_FLAG,
	          arrLength = array.length,
	          othLength = other.length;

	      if (arrLength != othLength && !(isPartial && othLength > arrLength)) {
	        return false;
	      }
	      // Assume cyclic values are equal.
	      var stacked = stack.get(array);
	      if (stacked) {
	        return stacked == other;
	      }
	      var result = true;
	      stack.set(array, other);

	      // Ignore non-index properties.
	      while (++index < arrLength) {
	        var arrValue = array[index],
	            othValue = other[index];

	        if (customizer) {
	          var compared = isPartial
	            ? customizer(othValue, arrValue, index, other, array, stack)
	            : customizer(arrValue, othValue, index, array, other, stack);
	        }
	        if (compared !== undefined) {
	          if (compared) {
	            continue;
	          }
	          result = false;
	          break;
	        }
	        // Recursively compare arrays (susceptible to call stack limits).
	        if (isUnordered) {
	          if (!arraySome(other, function(othValue) {
	                return arrValue === othValue ||
	                  equalFunc(arrValue, othValue, customizer, bitmask, stack);
	              })) {
	            result = false;
	            break;
	          }
	        } else if (!(
	              arrValue === othValue ||
	                equalFunc(arrValue, othValue, customizer, bitmask, stack)
	            )) {
	          result = false;
	          break;
	        }
	      }
	      stack['delete'](array);
	      return result;
	    }

	    /**
	     * A specialized version of `baseIsEqualDeep` for comparing objects of
	     * the same `toStringTag`.
	     *
	     * **Note:** This function only supports comparing values with tags of
	     * `Boolean`, `Date`, `Error`, `Number`, `RegExp`, or `String`.
	     *
	     * @private
	     * @param {Object} object The object to compare.
	     * @param {Object} other The other object to compare.
	     * @param {string} tag The `toStringTag` of the objects to compare.
	     * @param {Function} equalFunc The function to determine equivalents of values.
	     * @param {Function} customizer The function to customize comparisons.
	     * @param {number} bitmask The bitmask of comparison flags. See `baseIsEqual`
	     *  for more details.
	     * @param {Object} stack Tracks traversed `object` and `other` objects.
	     * @returns {boolean} Returns `true` if the objects are equivalent, else `false`.
	     */
	    function equalByTag(object, other, tag, equalFunc, customizer, bitmask, stack) {
	      switch (tag) {
	        case dataViewTag:
	          if ((object.byteLength != other.byteLength) ||
	              (object.byteOffset != other.byteOffset)) {
	            return false;
	          }
	          object = object.buffer;
	          other = other.buffer;

	        case arrayBufferTag:
	          if ((object.byteLength != other.byteLength) ||
	              !equalFunc(new Uint8Array(object), new Uint8Array(other))) {
	            return false;
	          }
	          return true;

	        case boolTag:
	        case dateTag:
	          // Coerce dates and booleans to numbers, dates to milliseconds and
	          // booleans to `1` or `0` treating invalid dates coerced to `NaN` as
	          // not equal.
	          return +object == +other;

	        case errorTag:
	          return object.name == other.name && object.message == other.message;

	        case numberTag:
	          // Treat `NaN` vs. `NaN` as equal.
	          return (object != +object) ? other != +other : object == +other;

	        case regexpTag:
	        case stringTag:
	          // Coerce regexes to strings and treat strings, primitives and objects,
	          // as equal. See http://www.ecma-international.org/ecma-262/6.0/#sec-regexp.prototype.tostring
	          // for more details.
	          return object == (other + '');

	        case mapTag:
	          var convert = mapToArray;

	        case setTag:
	          var isPartial = bitmask & PARTIAL_COMPARE_FLAG;
	          convert || (convert = setToArray);

	          if (object.size != other.size && !isPartial) {
	            return false;
	          }
	          // Assume cyclic values are equal.
	          var stacked = stack.get(object);
	          if (stacked) {
	            return stacked == other;
	          }
	          bitmask |= UNORDERED_COMPARE_FLAG;
	          stack.set(object, other);

	          // Recursively compare objects (susceptible to call stack limits).
	          return equalArrays(convert(object), convert(other), equalFunc, customizer, bitmask, stack);

	        case symbolTag:
	          if (symbolValueOf) {
	            return symbolValueOf.call(object) == symbolValueOf.call(other);
	          }
	      }
	      return false;
	    }

	    /**
	     * A specialized version of `baseIsEqualDeep` for objects with support for
	     * partial deep comparisons.
	     *
	     * @private
	     * @param {Object} object The object to compare.
	     * @param {Object} other The other object to compare.
	     * @param {Function} equalFunc The function to determine equivalents of values.
	     * @param {Function} customizer The function to customize comparisons.
	     * @param {number} bitmask The bitmask of comparison flags. See `baseIsEqual`
	     *  for more details.
	     * @param {Object} stack Tracks traversed `object` and `other` objects.
	     * @returns {boolean} Returns `true` if the objects are equivalent, else `false`.
	     */
	    function equalObjects(object, other, equalFunc, customizer, bitmask, stack) {
	      var isPartial = bitmask & PARTIAL_COMPARE_FLAG,
	          objProps = keys(object),
	          objLength = objProps.length,
	          othProps = keys(other),
	          othLength = othProps.length;

	      if (objLength != othLength && !isPartial) {
	        return false;
	      }
	      var index = objLength;
	      while (index--) {
	        var key = objProps[index];
	        if (!(isPartial ? key in other : baseHas(other, key))) {
	          return false;
	        }
	      }
	      // Assume cyclic values are equal.
	      var stacked = stack.get(object);
	      if (stacked) {
	        return stacked == other;
	      }
	      var result = true;
	      stack.set(object, other);

	      var skipCtor = isPartial;
	      while (++index < objLength) {
	        key = objProps[index];
	        var objValue = object[key],
	            othValue = other[key];

	        if (customizer) {
	          var compared = isPartial
	            ? customizer(othValue, objValue, key, other, object, stack)
	            : customizer(objValue, othValue, key, object, other, stack);
	        }
	        // Recursively compare objects (susceptible to call stack limits).
	        if (!(compared === undefined
	              ? (objValue === othValue || equalFunc(objValue, othValue, customizer, bitmask, stack))
	              : compared
	            )) {
	          result = false;
	          break;
	        }
	        skipCtor || (skipCtor = key == 'constructor');
	      }
	      if (result && !skipCtor) {
	        var objCtor = object.constructor,
	            othCtor = other.constructor;

	        // Non `Object` object instances with different constructors are not equal.
	        if (objCtor != othCtor &&
	            ('constructor' in object && 'constructor' in other) &&
	            !(typeof objCtor == 'function' && objCtor instanceof objCtor &&
	              typeof othCtor == 'function' && othCtor instanceof othCtor)) {
	          result = false;
	        }
	      }
	      stack['delete'](object);
	      return result;
	    }

	    /**
	     * Creates an array of own enumerable property names and symbols of `object`.
	     *
	     * @private
	     * @param {Object} object The object to query.
	     * @returns {Array} Returns the array of property names and symbols.
	     */
	    function getAllKeys(object) {
	      return baseGetAllKeys(object, keys, getSymbols);
	    }

	    /**
	     * Creates an array of own and inherited enumerable property names and
	     * symbols of `object`.
	     *
	     * @private
	     * @param {Object} object The object to query.
	     * @returns {Array} Returns the array of property names and symbols.
	     */
	    function getAllKeysIn(object) {
	      return baseGetAllKeys(object, keysIn, getSymbolsIn);
	    }

	    /**
	     * Gets metadata for `func`.
	     *
	     * @private
	     * @param {Function} func The function to query.
	     * @returns {*} Returns the metadata for `func`.
	     */
	    var getData = !metaMap ? noop : function(func) {
	      return metaMap.get(func);
	    };

	    /**
	     * Gets the name of `func`.
	     *
	     * @private
	     * @param {Function} func The function to query.
	     * @returns {string} Returns the function name.
	     */
	    function getFuncName(func) {
	      var result = (func.name + ''),
	          array = realNames[result],
	          length = hasOwnProperty.call(realNames, result) ? array.length : 0;

	      while (length--) {
	        var data = array[length],
	            otherFunc = data.func;
	        if (otherFunc == null || otherFunc == func) {
	          return data.name;
	        }
	      }
	      return result;
	    }

	    /**
	     * Gets the appropriate "iteratee" function. If `_.iteratee` is customized,
	     * this function returns the custom method, otherwise it returns `baseIteratee`.
	     * If arguments are provided, the chosen function is invoked with them and
	     * its result is returned.
	     *
	     * @private
	     * @param {*} [value] The value to convert to an iteratee.
	     * @param {number} [arity] The arity of the created iteratee.
	     * @returns {Function} Returns the chosen function or its result.
	     */
	    function getIteratee() {
	      var result = lodash.iteratee || iteratee;
	      result = result === iteratee ? baseIteratee : result;
	      return arguments.length ? result(arguments[0], arguments[1]) : result;
	    }

	    /**
	     * Gets the "length" property value of `object`.
	     *
	     * **Note:** This function is used to avoid a
	     * [JIT bug](https://bugs.webkit.org/show_bug.cgi?id=142792) that affects
	     * Safari on at least iOS 8.1-8.3 ARM64.
	     *
	     * @private
	     * @param {Object} object The object to query.
	     * @returns {*} Returns the "length" value.
	     */
	    var getLength = baseProperty('length');

	    /**
	     * Gets the property names, values, and compare flags of `object`.
	     *
	     * @private
	     * @param {Object} object The object to query.
	     * @returns {Array} Returns the match data of `object`.
	     */
	    function getMatchData(object) {
	      var result = toPairs(object),
	          length = result.length;

	      while (length--) {
	        result[length][2] = isStrictComparable(result[length][1]);
	      }
	      return result;
	    }

	    /**
	     * Gets the native function at `key` of `object`.
	     *
	     * @private
	     * @param {Object} object The object to query.
	     * @param {string} key The key of the method to get.
	     * @returns {*} Returns the function if it's native, else `undefined`.
	     */
	    function getNative(object, key) {
	      var value = object[key];
	      return isNative(value) ? value : undefined;
	    }

	    /**
	     * Gets the argument placeholder value for `func`.
	     *
	     * @private
	     * @param {Function} func The function to inspect.
	     * @returns {*} Returns the placeholder value.
	     */
	    function getPlaceholder(func) {
	      var object = hasOwnProperty.call(lodash, 'placeholder') ? lodash : func;
	      return object.placeholder;
	    }

	    /**
	     * Gets the `[[Prototype]]` of `value`.
	     *
	     * @private
	     * @param {*} value The value to query.
	     * @returns {null|Object} Returns the `[[Prototype]]`.
	     */
	    function getPrototype(value) {
	      return nativeGetPrototype(Object(value));
	    }

	    /**
	     * Creates an array of the own enumerable symbol properties of `object`.
	     *
	     * @private
	     * @param {Object} object The object to query.
	     * @returns {Array} Returns the array of symbols.
	     */
	    function getSymbols(object) {
	      // Coerce `object` to an object to avoid non-object errors in V8.
	      // See https://bugs.chromium.org/p/v8/issues/detail?id=3443 for more details.
	      return getOwnPropertySymbols(Object(object));
	    }

	    // Fallback for IE < 11.
	    if (!getOwnPropertySymbols) {
	      getSymbols = function() {
	        return [];
	      };
	    }

	    /**
	     * Creates an array of the own and inherited enumerable symbol properties
	     * of `object`.
	     *
	     * @private
	     * @param {Object} object The object to query.
	     * @returns {Array} Returns the array of symbols.
	     */
	    var getSymbolsIn = !getOwnPropertySymbols ? getSymbols : function(object) {
	      var result = [];
	      while (object) {
	        arrayPush(result, getSymbols(object));
	        object = getPrototype(object);
	      }
	      return result;
	    };

	    /**
	     * Gets the `toStringTag` of `value`.
	     *
	     * @private
	     * @param {*} value The value to query.
	     * @returns {string} Returns the `toStringTag`.
	     */
	    function getTag(value) {
	      return objectToString.call(value);
	    }

	    // Fallback for data views, maps, sets, and weak maps in IE 11,
	    // for data views in Edge, and promises in Node.js.
	    if ((DataView && getTag(new DataView(new ArrayBuffer(1))) != dataViewTag) ||
	        (Map && getTag(new Map) != mapTag) ||
	        (Promise && getTag(Promise.resolve()) != promiseTag) ||
	        (Set && getTag(new Set) != setTag) ||
	        (WeakMap && getTag(new WeakMap) != weakMapTag)) {
	      getTag = function(value) {
	        var result = objectToString.call(value),
	            Ctor = result == objectTag ? value.constructor : undefined,
	            ctorString = Ctor ? toSource(Ctor) : undefined;

	        if (ctorString) {
	          switch (ctorString) {
	            case dataViewCtorString: return dataViewTag;
	            case mapCtorString: return mapTag;
	            case promiseCtorString: return promiseTag;
	            case setCtorString: return setTag;
	            case weakMapCtorString: return weakMapTag;
	          }
	        }
	        return result;
	      };
	    }

	    /**
	     * Gets the view, applying any `transforms` to the `start` and `end` positions.
	     *
	     * @private
	     * @param {number} start The start of the view.
	     * @param {number} end The end of the view.
	     * @param {Array} transforms The transformations to apply to the view.
	     * @returns {Object} Returns an object containing the `start` and `end`
	     *  positions of the view.
	     */
	    function getView(start, end, transforms) {
	      var index = -1,
	          length = transforms.length;

	      while (++index < length) {
	        var data = transforms[index],
	            size = data.size;

	        switch (data.type) {
	          case 'drop':      start += size; break;
	          case 'dropRight': end -= size; break;
	          case 'take':      end = nativeMin(end, start + size); break;
	          case 'takeRight': start = nativeMax(start, end - size); break;
	        }
	      }
	      return { 'start': start, 'end': end };
	    }

	    /**
	     * Checks if `path` exists on `object`.
	     *
	     * @private
	     * @param {Object} object The object to query.
	     * @param {Array|string} path The path to check.
	     * @param {Function} hasFunc The function to check properties.
	     * @returns {boolean} Returns `true` if `path` exists, else `false`.
	     */
	    function hasPath(object, path, hasFunc) {
	      path = isKey(path, object) ? [path] : castPath(path);

	      var result,
	          index = -1,
	          length = path.length;

	      while (++index < length) {
	        var key = path[index];
	        if (!(result = object != null && hasFunc(object, key))) {
	          break;
	        }
	        object = object[key];
	      }
	      if (result) {
	        return result;
	      }
	      var length = object ? object.length : 0;
	      return !!length && isLength(length) && isIndex(key, length) &&
	        (isArray(object) || isString(object) || isArguments(object));
	    }

	    /**
	     * Initializes an array clone.
	     *
	     * @private
	     * @param {Array} array The array to clone.
	     * @returns {Array} Returns the initialized clone.
	     */
	    function initCloneArray(array) {
	      var length = array.length,
	          result = array.constructor(length);

	      // Add properties assigned by `RegExp#exec`.
	      if (length && typeof array[0] == 'string' && hasOwnProperty.call(array, 'index')) {
	        result.index = array.index;
	        result.input = array.input;
	      }
	      return result;
	    }

	    /**
	     * Initializes an object clone.
	     *
	     * @private
	     * @param {Object} object The object to clone.
	     * @returns {Object} Returns the initialized clone.
	     */
	    function initCloneObject(object) {
	      return (typeof object.constructor == 'function' && !isPrototype(object))
	        ? baseCreate(getPrototype(object))
	        : {};
	    }

	    /**
	     * Initializes an object clone based on its `toStringTag`.
	     *
	     * **Note:** This function only supports cloning values with tags of
	     * `Boolean`, `Date`, `Error`, `Number`, `RegExp`, or `String`.
	     *
	     * @private
	     * @param {Object} object The object to clone.
	     * @param {string} tag The `toStringTag` of the object to clone.
	     * @param {Function} cloneFunc The function to clone values.
	     * @param {boolean} [isDeep] Specify a deep clone.
	     * @returns {Object} Returns the initialized clone.
	     */
	    function initCloneByTag(object, tag, cloneFunc, isDeep) {
	      var Ctor = object.constructor;
	      switch (tag) {
	        case arrayBufferTag:
	          return cloneArrayBuffer(object);

	        case boolTag:
	        case dateTag:
	          return new Ctor(+object);

	        case dataViewTag:
	          return cloneDataView(object, isDeep);

	        case float32Tag: case float64Tag:
	        case int8Tag: case int16Tag: case int32Tag:
	        case uint8Tag: case uint8ClampedTag: case uint16Tag: case uint32Tag:
	          return cloneTypedArray(object, isDeep);

	        case mapTag:
	          return cloneMap(object, isDeep, cloneFunc);

	        case numberTag:
	        case stringTag:
	          return new Ctor(object);

	        case regexpTag:
	          return cloneRegExp(object);

	        case setTag:
	          return cloneSet(object, isDeep, cloneFunc);

	        case symbolTag:
	          return cloneSymbol(object);
	      }
	    }

	    /**
	     * Creates an array of index keys for `object` values of arrays,
	     * `arguments` objects, and strings, otherwise `null` is returned.
	     *
	     * @private
	     * @param {Object} object The object to query.
	     * @returns {Array|null} Returns index keys, else `null`.
	     */
	    function indexKeys(object) {
	      var length = object ? object.length : undefined;
	      if (isLength(length) &&
	          (isArray(object) || isString(object) || isArguments(object))) {
	        return baseTimes(length, String);
	      }
	      return null;
	    }

	    /**
	     * Checks if `value` is a flattenable `arguments` object or array.
	     *
	     * @private
	     * @param {*} value The value to check.
	     * @returns {boolean} Returns `true` if `value` is flattenable, else `false`.
	     */
	    function isFlattenable(value) {
	      return isArrayLikeObject(value) && (isArray(value) || isArguments(value));
	    }

	    /**
	     * Checks if `value` is a flattenable array and not a `_.matchesProperty`
	     * iteratee shorthand.
	     *
	     * @private
	     * @param {*} value The value to check.
	     * @returns {boolean} Returns `true` if `value` is flattenable, else `false`.
	     */
	    function isFlattenableIteratee(value) {
	      return isArray(value) && !(value.length == 2 && !isFunction(value[0]));
	    }

	    /**
	     * Checks if the given arguments are from an iteratee call.
	     *
	     * @private
	     * @param {*} value The potential iteratee value argument.
	     * @param {*} index The potential iteratee index or key argument.
	     * @param {*} object The potential iteratee object argument.
	     * @returns {boolean} Returns `true` if the arguments are from an iteratee call,
	     *  else `false`.
	     */
	    function isIterateeCall(value, index, object) {
	      if (!isObject(object)) {
	        return false;
	      }
	      var type = typeof index;
	      if (type == 'number'
	            ? (isArrayLike(object) && isIndex(index, object.length))
	            : (type == 'string' && index in object)
	          ) {
	        return eq(object[index], value);
	      }
	      return false;
	    }

	    /**
	     * Checks if `value` is a property name and not a property path.
	     *
	     * @private
	     * @param {*} value The value to check.
	     * @param {Object} [object] The object to query keys on.
	     * @returns {boolean} Returns `true` if `value` is a property name, else `false`.
	     */
	    function isKey(value, object) {
	      var type = typeof value;
	      if (type == 'number' || type == 'symbol') {
	        return true;
	      }
	      return !isArray(value) &&
	        (isSymbol(value) || reIsPlainProp.test(value) || !reIsDeepProp.test(value) ||
	          (object != null && value in Object(object)));
	    }

	    /**
	     * Checks if `value` is suitable for use as unique object key.
	     *
	     * @private
	     * @param {*} value The value to check.
	     * @returns {boolean} Returns `true` if `value` is suitable, else `false`.
	     */
	    function isKeyable(value) {
	      var type = typeof value;
	      return type == 'number' || type == 'boolean' ||
	        (type == 'string' && value != '__proto__') || value == null;
	    }

	    /**
	     * Checks if `func` has a lazy counterpart.
	     *
	     * @private
	     * @param {Function} func The function to check.
	     * @returns {boolean} Returns `true` if `func` has a lazy counterpart,
	     *  else `false`.
	     */
	    function isLaziable(func) {
	      var funcName = getFuncName(func),
	          other = lodash[funcName];

	      if (typeof other != 'function' || !(funcName in LazyWrapper.prototype)) {
	        return false;
	      }
	      if (func === other) {
	        return true;
	      }
	      var data = getData(other);
	      return !!data && func === data[0];
	    }

	    /**
	     * Checks if `value` is likely a prototype object.
	     *
	     * @private
	     * @param {*} value The value to check.
	     * @returns {boolean} Returns `true` if `value` is a prototype, else `false`.
	     */
	    function isPrototype(value) {
	      var Ctor = value && value.constructor,
	          proto = (typeof Ctor == 'function' && Ctor.prototype) || objectProto;

	      return value === proto;
	    }

	    /**
	     * Checks if `value` is suitable for strict equality comparisons, i.e. `===`.
	     *
	     * @private
	     * @param {*} value The value to check.
	     * @returns {boolean} Returns `true` if `value` if suitable for strict
	     *  equality comparisons, else `false`.
	     */
	    function isStrictComparable(value) {
	      return value === value && !isObject(value);
	    }

	    /**
	     * A specialized version of `matchesProperty` for source values suitable
	     * for strict equality comparisons, i.e. `===`.
	     *
	     * @private
	     * @param {string} key The key of the property to get.
	     * @param {*} srcValue The value to match.
	     * @returns {Function} Returns the new function.
	     */
	    function matchesStrictComparable(key, srcValue) {
	      return function(object) {
	        if (object == null) {
	          return false;
	        }
	        return object[key] === srcValue &&
	          (srcValue !== undefined || (key in Object(object)));
	      };
	    }

	    /**
	     * Merges the function metadata of `source` into `data`.
	     *
	     * Merging metadata reduces the number of wrappers used to invoke a function.
	     * This is possible because methods like `_.bind`, `_.curry`, and `_.partial`
	     * may be applied regardless of execution order. Methods like `_.ary` and
	     * `_.rearg` modify function arguments, making the order in which they are
	     * executed important, preventing the merging of metadata. However, we make
	     * an exception for a safe combined case where curried functions have `_.ary`
	     * and or `_.rearg` applied.
	     *
	     * @private
	     * @param {Array} data The destination metadata.
	     * @param {Array} source The source metadata.
	     * @returns {Array} Returns `data`.
	     */
	    function mergeData(data, source) {
	      var bitmask = data[1],
	          srcBitmask = source[1],
	          newBitmask = bitmask | srcBitmask,
	          isCommon = newBitmask < (BIND_FLAG | BIND_KEY_FLAG | ARY_FLAG);

	      var isCombo =
	        ((srcBitmask == ARY_FLAG) && (bitmask == CURRY_FLAG)) ||
	        ((srcBitmask == ARY_FLAG) && (bitmask == REARG_FLAG) && (data[7].length <= source[8])) ||
	        ((srcBitmask == (ARY_FLAG | REARG_FLAG)) && (source[7].length <= source[8]) && (bitmask == CURRY_FLAG));

	      // Exit early if metadata can't be merged.
	      if (!(isCommon || isCombo)) {
	        return data;
	      }
	      // Use source `thisArg` if available.
	      if (srcBitmask & BIND_FLAG) {
	        data[2] = source[2];
	        // Set when currying a bound function.
	        newBitmask |= bitmask & BIND_FLAG ? 0 : CURRY_BOUND_FLAG;
	      }
	      // Compose partial arguments.
	      var value = source[3];
	      if (value) {
	        var partials = data[3];
	        data[3] = partials ? composeArgs(partials, value, source[4]) : value;
	        data[4] = partials ? replaceHolders(data[3], PLACEHOLDER) : source[4];
	      }
	      // Compose partial right arguments.
	      value = source[5];
	      if (value) {
	        partials = data[5];
	        data[5] = partials ? composeArgsRight(partials, value, source[6]) : value;
	        data[6] = partials ? replaceHolders(data[5], PLACEHOLDER) : source[6];
	      }
	      // Use source `argPos` if available.
	      value = source[7];
	      if (value) {
	        data[7] = value;
	      }
	      // Use source `ary` if it's smaller.
	      if (srcBitmask & ARY_FLAG) {
	        data[8] = data[8] == null ? source[8] : nativeMin(data[8], source[8]);
	      }
	      // Use source `arity` if one is not provided.
	      if (data[9] == null) {
	        data[9] = source[9];
	      }
	      // Use source `func` and merge bitmasks.
	      data[0] = source[0];
	      data[1] = newBitmask;

	      return data;
	    }

	    /**
	     * Used by `_.defaultsDeep` to customize its `_.merge` use.
	     *
	     * @private
	     * @param {*} objValue The destination value.
	     * @param {*} srcValue The source value.
	     * @param {string} key The key of the property to merge.
	     * @param {Object} object The parent object of `objValue`.
	     * @param {Object} source The parent object of `srcValue`.
	     * @param {Object} [stack] Tracks traversed source values and their merged
	     *  counterparts.
	     * @returns {*} Returns the value to assign.
	     */
	    function mergeDefaults(objValue, srcValue, key, object, source, stack) {
	      if (isObject(objValue) && isObject(srcValue)) {
	        baseMerge(objValue, srcValue, undefined, mergeDefaults, stack.set(srcValue, objValue));
	      }
	      return objValue;
	    }

	    /**
	     * Gets the parent value at `path` of `object`.
	     *
	     * @private
	     * @param {Object} object The object to query.
	     * @param {Array} path The path to get the parent value of.
	     * @returns {*} Returns the parent value.
	     */
	    function parent(object, path) {
	      return path.length == 1 ? object : baseGet(object, baseSlice(path, 0, -1));
	    }

	    /**
	     * Reorder `array` according to the specified indexes where the element at
	     * the first index is assigned as the first element, the element at
	     * the second index is assigned as the second element, and so on.
	     *
	     * @private
	     * @param {Array} array The array to reorder.
	     * @param {Array} indexes The arranged array indexes.
	     * @returns {Array} Returns `array`.
	     */
	    function reorder(array, indexes) {
	      var arrLength = array.length,
	          length = nativeMin(indexes.length, arrLength),
	          oldArray = copyArray(array);

	      while (length--) {
	        var index = indexes[length];
	        array[length] = isIndex(index, arrLength) ? oldArray[index] : undefined;
	      }
	      return array;
	    }

	    /**
	     * Sets metadata for `func`.
	     *
	     * **Note:** If this function becomes hot, i.e. is invoked a lot in a short
	     * period of time, it will trip its breaker and transition to an identity
	     * function to avoid garbage collection pauses in V8. See
	     * [V8 issue 2070](https://bugs.chromium.org/p/v8/issues/detail?id=2070)
	     * for more details.
	     *
	     * @private
	     * @param {Function} func The function to associate metadata with.
	     * @param {*} data The metadata.
	     * @returns {Function} Returns `func`.
	     */
	    var setData = (function() {
	      var count = 0,
	          lastCalled = 0;

	      return function(key, value) {
	        var stamp = now(),
	            remaining = HOT_SPAN - (stamp - lastCalled);

	        lastCalled = stamp;
	        if (remaining > 0) {
	          if (++count >= HOT_COUNT) {
	            return key;
	          }
	        } else {
	          count = 0;
	        }
	        return baseSetData(key, value);
	      };
	    }());

	    /**
	     * Converts `string` to a property path array.
	     *
	     * @private
	     * @param {string} string The string to convert.
	     * @returns {Array} Returns the property path array.
	     */
	    var stringToPath = memoize(function(string) {
	      var result = [];
	      toString(string).replace(rePropName, function(match, number, quote, string) {
	        result.push(quote ? string.replace(reEscapeChar, '$1') : (number || match));
	      });
	      return result;
	    });

	    /**
	     * Converts `value` to a string key if it's not a string or symbol.
	     *
	     * @private
	     * @param {*} value The value to inspect.
	     * @returns {string|symbol} Returns the key.
	     */
	    function toKey(key) {
	      return (typeof key == 'string' || isSymbol(key)) ? key : (key + '');
	    }

	    /**
	     * Converts `func` to its source code.
	     *
	     * @private
	     * @param {Function} func The function to process.
	     * @returns {string} Returns the source code.
	     */
	    function toSource(func) {
	      if (func != null) {
	        try {
	          return funcToString.call(func);
	        } catch (e) {}
	        try {
	          return (func + '');
	        } catch (e) {}
	      }
	      return '';
	    }

	    /**
	     * Creates a clone of `wrapper`.
	     *
	     * @private
	     * @param {Object} wrapper The wrapper to clone.
	     * @returns {Object} Returns the cloned wrapper.
	     */
	    function wrapperClone(wrapper) {
	      if (wrapper instanceof LazyWrapper) {
	        return wrapper.clone();
	      }
	      var result = new LodashWrapper(wrapper.__wrapped__, wrapper.__chain__);
	      result.__actions__ = copyArray(wrapper.__actions__);
	      result.__index__  = wrapper.__index__;
	      result.__values__ = wrapper.__values__;
	      return result;
	    }

	    /*------------------------------------------------------------------------*/

	    /**
	     * Creates an array of elements split into groups the length of `size`.
	     * If `array` can't be split evenly, the final chunk will be the remaining
	     * elements.
	     *
	     * @static
	     * @memberOf _
	     * @since 3.0.0
	     * @category Array
	     * @param {Array} array The array to process.
	     * @param {number} [size=1] The length of each chunk
	     * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
	     * @returns {Array} Returns the new array containing chunks.
	     * @example
	     *
	     * _.chunk(['a', 'b', 'c', 'd'], 2);
	     * // => [['a', 'b'], ['c', 'd']]
	     *
	     * _.chunk(['a', 'b', 'c', 'd'], 3);
	     * // => [['a', 'b', 'c'], ['d']]
	     */
	    function chunk(array, size, guard) {
	      if ((guard ? isIterateeCall(array, size, guard) : size === undefined)) {
	        size = 1;
	      } else {
	        size = nativeMax(toInteger(size), 0);
	      }
	      var length = array ? array.length : 0;
	      if (!length || size < 1) {
	        return [];
	      }
	      var index = 0,
	          resIndex = 0,
	          result = Array(nativeCeil(length / size));

	      while (index < length) {
	        result[resIndex++] = baseSlice(array, index, (index += size));
	      }
	      return result;
	    }

	    /**
	     * Creates an array with all falsey values removed. The values `false`, `null`,
	     * `0`, `""`, `undefined`, and `NaN` are falsey.
	     *
	     * @static
	     * @memberOf _
	     * @since 0.1.0
	     * @category Array
	     * @param {Array} array The array to compact.
	     * @returns {Array} Returns the new array of filtered values.
	     * @example
	     *
	     * _.compact([0, 1, false, 2, '', 3]);
	     * // => [1, 2, 3]
	     */
	    function compact(array) {
	      var index = -1,
	          length = array ? array.length : 0,
	          resIndex = 0,
	          result = [];

	      while (++index < length) {
	        var value = array[index];
	        if (value) {
	          result[resIndex++] = value;
	        }
	      }
	      return result;
	    }

	    /**
	     * Creates a new array concatenating `array` with any additional arrays
	     * and/or values.
	     *
	     * @static
	     * @memberOf _
	     * @since 4.0.0
	     * @category Array
	     * @param {Array} array The array to concatenate.
	     * @param {...*} [values] The values to concatenate.
	     * @returns {Array} Returns the new concatenated array.
	     * @example
	     *
	     * var array = [1];
	     * var other = _.concat(array, 2, [3], [[4]]);
	     *
	     * console.log(other);
	     * // => [1, 2, 3, [4]]
	     *
	     * console.log(array);
	     * // => [1]
	     */
	    function concat() {
	      var length = arguments.length,
	          array = castArray(arguments[0]);

	      if (length < 2) {
	        return length ? copyArray(array) : [];
	      }
	      var args = Array(length - 1);
	      while (length--) {
	        args[length - 1] = arguments[length];
	      }
	      return arrayConcat(array, baseFlatten(args, 1));
	    }

	    /**
	     * Creates an array of unique `array` values not included in the other given
	     * arrays using [`SameValueZero`](http://ecma-international.org/ecma-262/6.0/#sec-samevaluezero)
	     * for equality comparisons. The order of result values is determined by the
	     * order they occur in the first array.
	     *
	     * @static
	     * @memberOf _
	     * @since 0.1.0
	     * @category Array
	     * @param {Array} array The array to inspect.
	     * @param {...Array} [values] The values to exclude.
	     * @returns {Array} Returns the new array of filtered values.
	     * @example
	     *
	     * _.difference([3, 2, 1], [4, 2]);
	     * // => [3, 1]
	     */
	    var difference = rest(function(array, values) {
	      return isArrayLikeObject(array)
	        ? baseDifference(array, baseFlatten(values, 1, isArrayLikeObject, true))
	        : [];
	    });

	    /**
	     * This method is like `_.difference` except that it accepts `iteratee` which
	     * is invoked for each element of `array` and `values` to generate the criterion
	     * by which they're compared. Result values are chosen from the first array.
	     * The iteratee is invoked with one argument: (value).
	     *
	     * @static
	     * @memberOf _
	     * @since 4.0.0
	     * @category Array
	     * @param {Array} array The array to inspect.
	     * @param {...Array} [values] The values to exclude.
	     * @param {Array|Function|Object|string} [iteratee=_.identity]
	     *  The iteratee invoked per element.
	     * @returns {Array} Returns the new array of filtered values.
	     * @example
	     *
	     * _.differenceBy([3.1, 2.2, 1.3], [4.4, 2.5], Math.floor);
	     * // => [3.1, 1.3]
	     *
	     * // The `_.property` iteratee shorthand.
	     * _.differenceBy([{ 'x': 2 }, { 'x': 1 }], [{ 'x': 1 }], 'x');
	     * // => [{ 'x': 2 }]
	     */
	    var differenceBy = rest(function(array, values) {
	      var iteratee = last(values);
	      if (isArrayLikeObject(iteratee)) {
	        iteratee = undefined;
	      }
	      return isArrayLikeObject(array)
	        ? baseDifference(array, baseFlatten(values, 1, isArrayLikeObject, true), getIteratee(iteratee))
	        : [];
	    });

	    /**
	     * This method is like `_.difference` except that it accepts `comparator`
	     * which is invoked to compare elements of `array` to `values`. Result values
	     * are chosen from the first array. The comparator is invoked with two arguments:
	     * (arrVal, othVal).
	     *
	     * @static
	     * @memberOf _
	     * @since 4.0.0
	     * @category Array
	     * @param {Array} array The array to inspect.
	     * @param {...Array} [values] The values to exclude.
	     * @param {Function} [comparator] The comparator invoked per element.
	     * @returns {Array} Returns the new array of filtered values.
	     * @example
	     *
	     * var objects = [{ 'x': 1, 'y': 2 }, { 'x': 2, 'y': 1 }];
	     *
	     * _.differenceWith(objects, [{ 'x': 1, 'y': 2 }], _.isEqual);
	     * // => [{ 'x': 2, 'y': 1 }]
	     */
	    var differenceWith = rest(function(array, values) {
	      var comparator = last(values);
	      if (isArrayLikeObject(comparator)) {
	        comparator = undefined;
	      }
	      return isArrayLikeObject(array)
	        ? baseDifference(array, baseFlatten(values, 1, isArrayLikeObject, true), undefined, comparator)
	        : [];
	    });

	    /**
	     * Creates a slice of `array` with `n` elements dropped from the beginning.
	     *
	     * @static
	     * @memberOf _
	     * @since 0.5.0
	     * @category Array
	     * @param {Array} array The array to query.
	     * @param {number} [n=1] The number of elements to drop.
	     * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
	     * @returns {Array} Returns the slice of `array`.
	     * @example
	     *
	     * _.drop([1, 2, 3]);
	     * // => [2, 3]
	     *
	     * _.drop([1, 2, 3], 2);
	     * // => [3]
	     *
	     * _.drop([1, 2, 3], 5);
	     * // => []
	     *
	     * _.drop([1, 2, 3], 0);
	     * // => [1, 2, 3]
	     */
	    function drop(array, n, guard) {
	      var length = array ? array.length : 0;
	      if (!length) {
	        return [];
	      }
	      n = (guard || n === undefined) ? 1 : toInteger(n);
	      return baseSlice(array, n < 0 ? 0 : n, length);
	    }

	    /**
	     * Creates a slice of `array` with `n` elements dropped from the end.
	     *
	     * @static
	     * @memberOf _
	     * @since 3.0.0
	     * @category Array
	     * @param {Array} array The array to query.
	     * @param {number} [n=1] The number of elements to drop.
	     * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
	     * @returns {Array} Returns the slice of `array`.
	     * @example
	     *
	     * _.dropRight([1, 2, 3]);
	     * // => [1, 2]
	     *
	     * _.dropRight([1, 2, 3], 2);
	     * // => [1]
	     *
	     * _.dropRight([1, 2, 3], 5);
	     * // => []
	     *
	     * _.dropRight([1, 2, 3], 0);
	     * // => [1, 2, 3]
	     */
	    function dropRight(array, n, guard) {
	      var length = array ? array.length : 0;
	      if (!length) {
	        return [];
	      }
	      n = (guard || n === undefined) ? 1 : toInteger(n);
	      n = length - n;
	      return baseSlice(array, 0, n < 0 ? 0 : n);
	    }

	    /**
	     * Creates a slice of `array` excluding elements dropped from the end.
	     * Elements are dropped until `predicate` returns falsey. The predicate is
	     * invoked with three arguments: (value, index, array).
	     *
	     * @static
	     * @memberOf _
	     * @since 3.0.0
	     * @category Array
	     * @param {Array} array The array to query.
	     * @param {Array|Function|Object|string} [predicate=_.identity]
	     *  The function invoked per iteration.
	     * @returns {Array} Returns the slice of `array`.
	     * @example
	     *
	     * var users = [
	     *   { 'user': 'barney',  'active': true },
	     *   { 'user': 'fred',    'active': false },
	     *   { 'user': 'pebbles', 'active': false }
	     * ];
	     *
	     * _.dropRightWhile(users, function(o) { return !o.active; });
	     * // => objects for ['barney']
	     *
	     * // The `_.matches` iteratee shorthand.
	     * _.dropRightWhile(users, { 'user': 'pebbles', 'active': false });
	     * // => objects for ['barney', 'fred']
	     *
	     * // The `_.matchesProperty` iteratee shorthand.
	     * _.dropRightWhile(users, ['active', false]);
	     * // => objects for ['barney']
	     *
	     * // The `_.property` iteratee shorthand.
	     * _.dropRightWhile(users, 'active');
	     * // => objects for ['barney', 'fred', 'pebbles']
	     */
	    function dropRightWhile(array, predicate) {
	      return (array && array.length)
	        ? baseWhile(array, getIteratee(predicate, 3), true, true)
	        : [];
	    }

	    /**
	     * Creates a slice of `array` excluding elements dropped from the beginning.
	     * Elements are dropped until `predicate` returns falsey. The predicate is
	     * invoked with three arguments: (value, index, array).
	     *
	     * @static
	     * @memberOf _
	     * @since 3.0.0
	     * @category Array
	     * @param {Array} array The array to query.
	     * @param {Array|Function|Object|string} [predicate=_.identity]
	     *  The function invoked per iteration.
	     * @returns {Array} Returns the slice of `array`.
	     * @example
	     *
	     * var users = [
	     *   { 'user': 'barney',  'active': false },
	     *   { 'user': 'fred',    'active': false },
	     *   { 'user': 'pebbles', 'active': true }
	     * ];
	     *
	     * _.dropWhile(users, function(o) { return !o.active; });
	     * // => objects for ['pebbles']
	     *
	     * // The `_.matches` iteratee shorthand.
	     * _.dropWhile(users, { 'user': 'barney', 'active': false });
	     * // => objects for ['fred', 'pebbles']
	     *
	     * // The `_.matchesProperty` iteratee shorthand.
	     * _.dropWhile(users, ['active', false]);
	     * // => objects for ['pebbles']
	     *
	     * // The `_.property` iteratee shorthand.
	     * _.dropWhile(users, 'active');
	     * // => objects for ['barney', 'fred', 'pebbles']
	     */
	    function dropWhile(array, predicate) {
	      return (array && array.length)
	        ? baseWhile(array, getIteratee(predicate, 3), true)
	        : [];
	    }

	    /**
	     * Fills elements of `array` with `value` from `start` up to, but not
	     * including, `end`.
	     *
	     * **Note:** This method mutates `array`.
	     *
	     * @static
	     * @memberOf _
	     * @since 3.2.0
	     * @category Array
	     * @param {Array} array The array to fill.
	     * @param {*} value The value to fill `array` with.
	     * @param {number} [start=0] The start position.
	     * @param {number} [end=array.length] The end position.
	     * @returns {Array} Returns `array`.
	     * @example
	     *
	     * var array = [1, 2, 3];
	     *
	     * _.fill(array, 'a');
	     * console.log(array);
	     * // => ['a', 'a', 'a']
	     *
	     * _.fill(Array(3), 2);
	     * // => [2, 2, 2]
	     *
	     * _.fill([4, 6, 8, 10], '*', 1, 3);
	     * // => [4, '*', '*', 10]
	     */
	    function fill(array, value, start, end) {
	      var length = array ? array.length : 0;
	      if (!length) {
	        return [];
	      }
	      if (start && typeof start != 'number' && isIterateeCall(array, value, start)) {
	        start = 0;
	        end = length;
	      }
	      return baseFill(array, value, start, end);
	    }

	    /**
	     * This method is like `_.find` except that it returns the index of the first
	     * element `predicate` returns truthy for instead of the element itself.
	     *
	     * @static
	     * @memberOf _
	     * @since 1.1.0
	     * @category Array
	     * @param {Array} array The array to search.
	     * @param {Array|Function|Object|string} [predicate=_.identity]
	     *  The function invoked per iteration.
	     * @returns {number} Returns the index of the found element, else `-1`.
	     * @example
	     *
	     * var users = [
	     *   { 'user': 'barney',  'active': false },
	     *   { 'user': 'fred',    'active': false },
	     *   { 'user': 'pebbles', 'active': true }
	     * ];
	     *
	     * _.findIndex(users, function(o) { return o.user == 'barney'; });
	     * // => 0
	     *
	     * // The `_.matches` iteratee shorthand.
	     * _.findIndex(users, { 'user': 'fred', 'active': false });
	     * // => 1
	     *
	     * // The `_.matchesProperty` iteratee shorthand.
	     * _.findIndex(users, ['active', false]);
	     * // => 0
	     *
	     * // The `_.property` iteratee shorthand.
	     * _.findIndex(users, 'active');
	     * // => 2
	     */
	    function findIndex(array, predicate) {
	      return (array && array.length)
	        ? baseFindIndex(array, getIteratee(predicate, 3))
	        : -1;
	    }

	    /**
	     * This method is like `_.findIndex` except that it iterates over elements
	     * of `collection` from right to left.
	     *
	     * @static
	     * @memberOf _
	     * @since 2.0.0
	     * @category Array
	     * @param {Array} array The array to search.
	     * @param {Array|Function|Object|string} [predicate=_.identity]
	     *  The function invoked per iteration.
	     * @returns {number} Returns the index of the found element, else `-1`.
	     * @example
	     *
	     * var users = [
	     *   { 'user': 'barney',  'active': true },
	     *   { 'user': 'fred',    'active': false },
	     *   { 'user': 'pebbles', 'active': false }
	     * ];
	     *
	     * _.findLastIndex(users, function(o) { return o.user == 'pebbles'; });
	     * // => 2
	     *
	     * // The `_.matches` iteratee shorthand.
	     * _.findLastIndex(users, { 'user': 'barney', 'active': true });
	     * // => 0
	     *
	     * // The `_.matchesProperty` iteratee shorthand.
	     * _.findLastIndex(users, ['active', false]);
	     * // => 2
	     *
	     * // The `_.property` iteratee shorthand.
	     * _.findLastIndex(users, 'active');
	     * // => 0
	     */
	    function findLastIndex(array, predicate) {
	      return (array && array.length)
	        ? baseFindIndex(array, getIteratee(predicate, 3), true)
	        : -1;
	    }

	    /**
	     * Flattens `array` a single level deep.
	     *
	     * @static
	     * @memberOf _
	     * @since 0.1.0
	     * @category Array
	     * @param {Array} array The array to flatten.
	     * @returns {Array} Returns the new flattened array.
	     * @example
	     *
	     * _.flatten([1, [2, [3, [4]], 5]]);
	     * // => [1, 2, [3, [4]], 5]
	     */
	    function flatten(array) {
	      var length = array ? array.length : 0;
	      return length ? baseFlatten(array, 1) : [];
	    }

	    /**
	     * Recursively flattens `array`.
	     *
	     * @static
	     * @memberOf _
	     * @since 3.0.0
	     * @category Array
	     * @param {Array} array The array to flatten.
	     * @returns {Array} Returns the new flattened array.
	     * @example
	     *
	     * _.flattenDeep([1, [2, [3, [4]], 5]]);
	     * // => [1, 2, 3, 4, 5]
	     */
	    function flattenDeep(array) {
	      var length = array ? array.length : 0;
	      return length ? baseFlatten(array, INFINITY) : [];
	    }

	    /**
	     * Recursively flatten `array` up to `depth` times.
	     *
	     * @static
	     * @memberOf _
	     * @since 4.4.0
	     * @category Array
	     * @param {Array} array The array to flatten.
	     * @param {number} [depth=1] The maximum recursion depth.
	     * @returns {Array} Returns the new flattened array.
	     * @example
	     *
	     * var array = [1, [2, [3, [4]], 5]];
	     *
	     * _.flattenDepth(array, 1);
	     * // => [1, 2, [3, [4]], 5]
	     *
	     * _.flattenDepth(array, 2);
	     * // => [1, 2, 3, [4], 5]
	     */
	    function flattenDepth(array, depth) {
	      var length = array ? array.length : 0;
	      if (!length) {
	        return [];
	      }
	      depth = depth === undefined ? 1 : toInteger(depth);
	      return baseFlatten(array, depth);
	    }

	    /**
	     * The inverse of `_.toPairs`; this method returns an object composed
	     * from key-value `pairs`.
	     *
	     * @static
	     * @memberOf _
	     * @since 4.0.0
	     * @category Array
	     * @param {Array} pairs The key-value pairs.
	     * @returns {Object} Returns the new object.
	     * @example
	     *
	     * _.fromPairs([['fred', 30], ['barney', 40]]);
	     * // => { 'fred': 30, 'barney': 40 }
	     */
	    function fromPairs(pairs) {
	      var index = -1,
	          length = pairs ? pairs.length : 0,
	          result = {};

	      while (++index < length) {
	        var pair = pairs[index];
	        result[pair[0]] = pair[1];
	      }
	      return result;
	    }

	    /**
	     * Gets the first element of `array`.
	     *
	     * @static
	     * @memberOf _
	     * @since 0.1.0
	     * @alias first
	     * @category Array
	     * @param {Array} array The array to query.
	     * @returns {*} Returns the first element of `array`.
	     * @example
	     *
	     * _.head([1, 2, 3]);
	     * // => 1
	     *
	     * _.head([]);
	     * // => undefined
	     */
	    function head(array) {
	      return (array && array.length) ? array[0] : undefined;
	    }

	    /**
	     * Gets the index at which the first occurrence of `value` is found in `array`
	     * using [`SameValueZero`](http://ecma-international.org/ecma-262/6.0/#sec-samevaluezero)
	     * for equality comparisons. If `fromIndex` is negative, it's used as the
	     * offset from the end of `array`.
	     *
	     * @static
	     * @memberOf _
	     * @since 0.1.0
	     * @category Array
	     * @param {Array} array The array to search.
	     * @param {*} value The value to search for.
	     * @param {number} [fromIndex=0] The index to search from.
	     * @returns {number} Returns the index of the matched value, else `-1`.
	     * @example
	     *
	     * _.indexOf([1, 2, 1, 2], 2);
	     * // => 1
	     *
	     * // Search from the `fromIndex`.
	     * _.indexOf([1, 2, 1, 2], 2, 2);
	     * // => 3
	     */
	    function indexOf(array, value, fromIndex) {
	      var length = array ? array.length : 0;
	      if (!length) {
	        return -1;
	      }
	      fromIndex = toInteger(fromIndex);
	      if (fromIndex < 0) {
	        fromIndex = nativeMax(length + fromIndex, 0);
	      }
	      return baseIndexOf(array, value, fromIndex);
	    }

	    /**
	     * Gets all but the last element of `array`.
	     *
	     * @static
	     * @memberOf _
	     * @since 0.1.0
	     * @category Array
	     * @param {Array} array The array to query.
	     * @returns {Array} Returns the slice of `array`.
	     * @example
	     *
	     * _.initial([1, 2, 3]);
	     * // => [1, 2]
	     */
	    function initial(array) {
	      return dropRight(array, 1);
	    }

	    /**
	     * Creates an array of unique values that are included in all given arrays
	     * using [`SameValueZero`](http://ecma-international.org/ecma-262/6.0/#sec-samevaluezero)
	     * for equality comparisons. The order of result values is determined by the
	     * order they occur in the first array.
	     *
	     * @static
	     * @memberOf _
	     * @since 0.1.0
	     * @category Array
	     * @param {...Array} [arrays] The arrays to inspect.
	     * @returns {Array} Returns the new array of intersecting values.
	     * @example
	     *
	     * _.intersection([2, 1], [4, 2], [1, 2]);
	     * // => [2]
	     */
	    var intersection = rest(function(arrays) {
	      var mapped = arrayMap(arrays, castArrayLikeObject);
	      return (mapped.length && mapped[0] === arrays[0])
	        ? baseIntersection(mapped)
	        : [];
	    });

	    /**
	     * This method is like `_.intersection` except that it accepts `iteratee`
	     * which is invoked for each element of each `arrays` to generate the criterion
	     * by which they're compared. Result values are chosen from the first array.
	     * The iteratee is invoked with one argument: (value).
	     *
	     * @static
	     * @memberOf _
	     * @since 4.0.0
	     * @category Array
	     * @param {...Array} [arrays] The arrays to inspect.
	     * @param {Array|Function|Object|string} [iteratee=_.identity]
	     *  The iteratee invoked per element.
	     * @returns {Array} Returns the new array of intersecting values.
	     * @example
	     *
	     * _.intersectionBy([2.1, 1.2], [4.3, 2.4], Math.floor);
	     * // => [2.1]
	     *
	     * // The `_.property` iteratee shorthand.
	     * _.intersectionBy([{ 'x': 1 }], [{ 'x': 2 }, { 'x': 1 }], 'x');
	     * // => [{ 'x': 1 }]
	     */
	    var intersectionBy = rest(function(arrays) {
	      var iteratee = last(arrays),
	          mapped = arrayMap(arrays, castArrayLikeObject);

	      if (iteratee === last(mapped)) {
	        iteratee = undefined;
	      } else {
	        mapped.pop();
	      }
	      return (mapped.length && mapped[0] === arrays[0])
	        ? baseIntersection(mapped, getIteratee(iteratee))
	        : [];
	    });

	    /**
	     * This method is like `_.intersection` except that it accepts `comparator`
	     * which is invoked to compare elements of `arrays`. Result values are chosen
	     * from the first array. The comparator is invoked with two arguments:
	     * (arrVal, othVal).
	     *
	     * @static
	     * @memberOf _
	     * @since 4.0.0
	     * @category Array
	     * @param {...Array} [arrays] The arrays to inspect.
	     * @param {Function} [comparator] The comparator invoked per element.
	     * @returns {Array} Returns the new array of intersecting values.
	     * @example
	     *
	     * var objects = [{ 'x': 1, 'y': 2 }, { 'x': 2, 'y': 1 }];
	     * var others = [{ 'x': 1, 'y': 1 }, { 'x': 1, 'y': 2 }];
	     *
	     * _.intersectionWith(objects, others, _.isEqual);
	     * // => [{ 'x': 1, 'y': 2 }]
	     */
	    var intersectionWith = rest(function(arrays) {
	      var comparator = last(arrays),
	          mapped = arrayMap(arrays, castArrayLikeObject);

	      if (comparator === last(mapped)) {
	        comparator = undefined;
	      } else {
	        mapped.pop();
	      }
	      return (mapped.length && mapped[0] === arrays[0])
	        ? baseIntersection(mapped, undefined, comparator)
	        : [];
	    });

	    /**
	     * Converts all elements in `array` into a string separated by `separator`.
	     *
	     * @static
	     * @memberOf _
	     * @since 4.0.0
	     * @category Array
	     * @param {Array} array The array to convert.
	     * @param {string} [separator=','] The element separator.
	     * @returns {string} Returns the joined string.
	     * @example
	     *
	     * _.join(['a', 'b', 'c'], '~');
	     * // => 'a~b~c'
	     */
	    function join(array, separator) {
	      return array ? nativeJoin.call(array, separator) : '';
	    }

	    /**
	     * Gets the last element of `array`.
	     *
	     * @static
	     * @memberOf _
	     * @since 0.1.0
	     * @category Array
	     * @param {Array} array The array to query.
	     * @returns {*} Returns the last element of `array`.
	     * @example
	     *
	     * _.last([1, 2, 3]);
	     * // => 3
	     */
	    function last(array) {
	      var length = array ? array.length : 0;
	      return length ? array[length - 1] : undefined;
	    }

	    /**
	     * This method is like `_.indexOf` except that it iterates over elements of
	     * `array` from right to left.
	     *
	     * @static
	     * @memberOf _
	     * @since 0.1.0
	     * @category Array
	     * @param {Array} array The array to search.
	     * @param {*} value The value to search for.
	     * @param {number} [fromIndex=array.length-1] The index to search from.
	     * @returns {number} Returns the index of the matched value, else `-1`.
	     * @example
	     *
	     * _.lastIndexOf([1, 2, 1, 2], 2);
	     * // => 3
	     *
	     * // Search from the `fromIndex`.
	     * _.lastIndexOf([1, 2, 1, 2], 2, 2);
	     * // => 1
	     */
	    function lastIndexOf(array, value, fromIndex) {
	      var length = array ? array.length : 0;
	      if (!length) {
	        return -1;
	      }
	      var index = length;
	      if (fromIndex !== undefined) {
	        index = toInteger(fromIndex);
	        index = (
	          index < 0
	            ? nativeMax(length + index, 0)
	            : nativeMin(index, length - 1)
	        ) + 1;
	      }
	      if (value !== value) {
	        return indexOfNaN(array, index, true);
	      }
	      while (index--) {
	        if (array[index] === value) {
	          return index;
	        }
	      }
	      return -1;
	    }

	    /**
	     * Gets the nth element of `array`. If `n` is negative, the nth element
	     * from the end is returned.
	     *
	     * @static
	     * @memberOf _
	     * @since 4.11.0
	     * @category Array
	     * @param {Array} array The array to query.
	     * @param {number} [n=0] The index of the element to return.
	     * @returns {*} Returns the nth element of `array`.
	     * @example
	     *
	     * var array = ['a', 'b', 'c', 'd'];
	     *
	     * _.nth(array, 1);
	     * // => 'b'
	     *
	     * _.nth(array, -2);
	     * // => 'c';
	     */
	    function nth(array, n) {
	      return (array && array.length) ? baseNth(array, toInteger(n)) : undefined;
	    }

	    /**
	     * Removes all given values from `array` using
	     * [`SameValueZero`](http://ecma-international.org/ecma-262/6.0/#sec-samevaluezero)
	     * for equality comparisons.
	     *
	     * **Note:** Unlike `_.without`, this method mutates `array`. Use `_.remove`
	     * to remove elements from an array by predicate.
	     *
	     * @static
	     * @memberOf _
	     * @since 2.0.0
	     * @category Array
	     * @param {Array} array The array to modify.
	     * @param {...*} [values] The values to remove.
	     * @returns {Array} Returns `array`.
	     * @example
	     *
	     * var array = [1, 2, 3, 1, 2, 3];
	     *
	     * _.pull(array, 2, 3);
	     * console.log(array);
	     * // => [1, 1]
	     */
	    var pull = rest(pullAll);

	    /**
	     * This method is like `_.pull` except that it accepts an array of values to remove.
	     *
	     * **Note:** Unlike `_.difference`, this method mutates `array`.
	     *
	     * @static
	     * @memberOf _
	     * @since 4.0.0
	     * @category Array
	     * @param {Array} array The array to modify.
	     * @param {Array} values The values to remove.
	     * @returns {Array} Returns `array`.
	     * @example
	     *
	     * var array = [1, 2, 3, 1, 2, 3];
	     *
	     * _.pullAll(array, [2, 3]);
	     * console.log(array);
	     * // => [1, 1]
	     */
	    function pullAll(array, values) {
	      return (array && array.length && values && values.length)
	        ? basePullAll(array, values)
	        : array;
	    }

	    /**
	     * This method is like `_.pullAll` except that it accepts `iteratee` which is
	     * invoked for each element of `array` and `values` to generate the criterion
	     * by which they're compared. The iteratee is invoked with one argument: (value).
	     *
	     * **Note:** Unlike `_.differenceBy`, this method mutates `array`.
	     *
	     * @static
	     * @memberOf _
	     * @since 4.0.0
	     * @category Array
	     * @param {Array} array The array to modify.
	     * @param {Array} values The values to remove.
	     * @param {Array|Function|Object|string} [iteratee=_.identity]
	     *  The iteratee invoked per element.
	     * @returns {Array} Returns `array`.
	     * @example
	     *
	     * var array = [{ 'x': 1 }, { 'x': 2 }, { 'x': 3 }, { 'x': 1 }];
	     *
	     * _.pullAllBy(array, [{ 'x': 1 }, { 'x': 3 }], 'x');
	     * console.log(array);
	     * // => [{ 'x': 2 }]
	     */
	    function pullAllBy(array, values, iteratee) {
	      return (array && array.length && values && values.length)
	        ? basePullAll(array, values, getIteratee(iteratee))
	        : array;
	    }

	    /**
	     * This method is like `_.pullAll` except that it accepts `comparator` which
	     * is invoked to compare elements of `array` to `values`. The comparator is
	     * invoked with two arguments: (arrVal, othVal).
	     *
	     * **Note:** Unlike `_.differenceWith`, this method mutates `array`.
	     *
	     * @static
	     * @memberOf _
	     * @since 4.6.0
	     * @category Array
	     * @param {Array} array The array to modify.
	     * @param {Array} values The values to remove.
	     * @param {Function} [comparator] The comparator invoked per element.
	     * @returns {Array} Returns `array`.
	     * @example
	     *
	     * var array = [{ 'x': 1, 'y': 2 }, { 'x': 3, 'y': 4 }, { 'x': 5, 'y': 6 }];
	     *
	     * _.pullAllWith(array, [{ 'x': 3, 'y': 4 }], _.isEqual);
	     * console.log(array);
	     * // => [{ 'x': 1, 'y': 2 }, { 'x': 5, 'y': 6 }]
	     */
	    function pullAllWith(array, values, comparator) {
	      return (array && array.length && values && values.length)
	        ? basePullAll(array, values, undefined, comparator)
	        : array;
	    }

	    /**
	     * Removes elements from `array` corresponding to `indexes` and returns an
	     * array of removed elements.
	     *
	     * **Note:** Unlike `_.at`, this method mutates `array`.
	     *
	     * @static
	     * @memberOf _
	     * @since 3.0.0
	     * @category Array
	     * @param {Array} array The array to modify.
	     * @param {...(number|number[])} [indexes] The indexes of elements to remove.
	     * @returns {Array} Returns the new array of removed elements.
	     * @example
	     *
	     * var array = [5, 10, 15, 20];
	     * var evens = _.pullAt(array, 1, 3);
	     *
	     * console.log(array);
	     * // => [5, 15]
	     *
	     * console.log(evens);
	     * // => [10, 20]
	     */
	    var pullAt = rest(function(array, indexes) {
	      indexes = arrayMap(baseFlatten(indexes, 1), String);

	      var result = baseAt(array, indexes);
	      basePullAt(array, indexes.sort(compareAscending));
	      return result;
	    });

	    /**
	     * Removes all elements from `array` that `predicate` returns truthy for
	     * and returns an array of the removed elements. The predicate is invoked
	     * with three arguments: (value, index, array).
	     *
	     * **Note:** Unlike `_.filter`, this method mutates `array`. Use `_.pull`
	     * to pull elements from an array by value.
	     *
	     * @static
	     * @memberOf _
	     * @since 2.0.0
	     * @category Array
	     * @param {Array} array The array to modify.
	     * @param {Array|Function|Object|string} [predicate=_.identity]
	     *  The function invoked per iteration.
	     * @returns {Array} Returns the new array of removed elements.
	     * @example
	     *
	     * var array = [1, 2, 3, 4];
	     * var evens = _.remove(array, function(n) {
	     *   return n % 2 == 0;
	     * });
	     *
	     * console.log(array);
	     * // => [1, 3]
	     *
	     * console.log(evens);
	     * // => [2, 4]
	     */
	    function remove(array, predicate) {
	      var result = [];
	      if (!(array && array.length)) {
	        return result;
	      }
	      var index = -1,
	          indexes = [],
	          length = array.length;

	      predicate = getIteratee(predicate, 3);
	      while (++index < length) {
	        var value = array[index];
	        if (predicate(value, index, array)) {
	          result.push(value);
	          indexes.push(index);
	        }
	      }
	      basePullAt(array, indexes);
	      return result;
	    }

	    /**
	     * Reverses `array` so that the first element becomes the last, the second
	     * element becomes the second to last, and so on.
	     *
	     * **Note:** This method mutates `array` and is based on
	     * [`Array#reverse`](https://mdn.io/Array/reverse).
	     *
	     * @static
	     * @memberOf _
	     * @since 4.0.0
	     * @category Array
	     * @param {Array} array The array to modify.
	     * @returns {Array} Returns `array`.
	     * @example
	     *
	     * var array = [1, 2, 3];
	     *
	     * _.reverse(array);
	     * // => [3, 2, 1]
	     *
	     * console.log(array);
	     * // => [3, 2, 1]
	     */
	    function reverse(array) {
	      return array ? nativeReverse.call(array) : array;
	    }

	    /**
	     * Creates a slice of `array` from `start` up to, but not including, `end`.
	     *
	     * **Note:** This method is used instead of
	     * [`Array#slice`](https://mdn.io/Array/slice) to ensure dense arrays are
	     * returned.
	     *
	     * @static
	     * @memberOf _
	     * @since 3.0.0
	     * @category Array
	     * @param {Array} array The array to slice.
	     * @param {number} [start=0] The start position.
	     * @param {number} [end=array.length] The end position.
	     * @returns {Array} Returns the slice of `array`.
	     */
	    function slice(array, start, end) {
	      var length = array ? array.length : 0;
	      if (!length) {
	        return [];
	      }
	      if (end && typeof end != 'number' && isIterateeCall(array, start, end)) {
	        start = 0;
	        end = length;
	      }
	      else {
	        start = start == null ? 0 : toInteger(start);
	        end = end === undefined ? length : toInteger(end);
	      }
	      return baseSlice(array, start, end);
	    }

	    /**
	     * Uses a binary search to determine the lowest index at which `value`
	     * should be inserted into `array` in order to maintain its sort order.
	     *
	     * @static
	     * @memberOf _
	     * @since 0.1.0
	     * @category Array
	     * @param {Array} array The sorted array to inspect.
	     * @param {*} value The value to evaluate.
	     * @returns {number} Returns the index at which `value` should be inserted
	     *  into `array`.
	     * @example
	     *
	     * _.sortedIndex([30, 50], 40);
	     * // => 1
	     *
	     * _.sortedIndex([4, 5], 4);
	     * // => 0
	     */
	    function sortedIndex(array, value) {
	      return baseSortedIndex(array, value);
	    }

	    /**
	     * This method is like `_.sortedIndex` except that it accepts `iteratee`
	     * which is invoked for `value` and each element of `array` to compute their
	     * sort ranking. The iteratee is invoked with one argument: (value).
	     *
	     * @static
	     * @memberOf _
	     * @since 4.0.0
	     * @category Array
	     * @param {Array} array The sorted array to inspect.
	     * @param {*} value The value to evaluate.
	     * @param {Array|Function|Object|string} [iteratee=_.identity]
	     *  The iteratee invoked per element.
	     * @returns {number} Returns the index at which `value` should be inserted
	     *  into `array`.
	     * @example
	     *
	     * var dict = { 'thirty': 30, 'forty': 40, 'fifty': 50 };
	     *
	     * _.sortedIndexBy(['thirty', 'fifty'], 'forty', _.propertyOf(dict));
	     * // => 1
	     *
	     * // The `_.property` iteratee shorthand.
	     * _.sortedIndexBy([{ 'x': 4 }, { 'x': 5 }], { 'x': 4 }, 'x');
	     * // => 0
	     */
	    function sortedIndexBy(array, value, iteratee) {
	      return baseSortedIndexBy(array, value, getIteratee(iteratee));
	    }

	    /**
	     * This method is like `_.indexOf` except that it performs a binary
	     * search on a sorted `array`.
	     *
	     * @static
	     * @memberOf _
	     * @since 4.0.0
	     * @category Array
	     * @param {Array} array The array to search.
	     * @param {*} value The value to search for.
	     * @returns {number} Returns the index of the matched value, else `-1`.
	     * @example
	     *
	     * _.sortedIndexOf([1, 1, 2, 2], 2);
	     * // => 2
	     */
	    function sortedIndexOf(array, value) {
	      var length = array ? array.length : 0;
	      if (length) {
	        var index = baseSortedIndex(array, value);
	        if (index < length && eq(array[index], value)) {
	          return index;
	        }
	      }
	      return -1;
	    }

	    /**
	     * This method is like `_.sortedIndex` except that it returns the highest
	     * index at which `value` should be inserted into `array` in order to
	     * maintain its sort order.
	     *
	     * @static
	     * @memberOf _
	     * @since 3.0.0
	     * @category Array
	     * @param {Array} array The sorted array to inspect.
	     * @param {*} value The value to evaluate.
	     * @returns {number} Returns the index at which `value` should be inserted
	     *  into `array`.
	     * @example
	     *
	     * _.sortedLastIndex([4, 5], 4);
	     * // => 1
	     */
	    function sortedLastIndex(array, value) {
	      return baseSortedIndex(array, value, true);
	    }

	    /**
	     * This method is like `_.sortedLastIndex` except that it accepts `iteratee`
	     * which is invoked for `value` and each element of `array` to compute their
	     * sort ranking. The iteratee is invoked with one argument: (value).
	     *
	     * @static
	     * @memberOf _
	     * @since 4.0.0
	     * @category Array
	     * @param {Array} array The sorted array to inspect.
	     * @param {*} value The value to evaluate.
	     * @param {Array|Function|Object|string} [iteratee=_.identity]
	     *  The iteratee invoked per element.
	     * @returns {number} Returns the index at which `value` should be inserted
	     *  into `array`.
	     * @example
	     *
	     * // The `_.property` iteratee shorthand.
	     * _.sortedLastIndexBy([{ 'x': 4 }, { 'x': 5 }], { 'x': 4 }, 'x');
	     * // => 1
	     */
	    function sortedLastIndexBy(array, value, iteratee) {
	      return baseSortedIndexBy(array, value, getIteratee(iteratee), true);
	    }

	    /**
	     * This method is like `_.lastIndexOf` except that it performs a binary
	     * search on a sorted `array`.
	     *
	     * @static
	     * @memberOf _
	     * @since 4.0.0
	     * @category Array
	     * @param {Array} array The array to search.
	     * @param {*} value The value to search for.
	     * @returns {number} Returns the index of the matched value, else `-1`.
	     * @example
	     *
	     * _.sortedLastIndexOf([1, 1, 2, 2], 2);
	     * // => 3
	     */
	    function sortedLastIndexOf(array, value) {
	      var length = array ? array.length : 0;
	      if (length) {
	        var index = baseSortedIndex(array, value, true) - 1;
	        if (eq(array[index], value)) {
	          return index;
	        }
	      }
	      return -1;
	    }

	    /**
	     * This method is like `_.uniq` except that it's designed and optimized
	     * for sorted arrays.
	     *
	     * @static
	     * @memberOf _
	     * @since 4.0.0
	     * @category Array
	     * @param {Array} array The array to inspect.
	     * @returns {Array} Returns the new duplicate free array.
	     * @example
	     *
	     * _.sortedUniq([1, 1, 2]);
	     * // => [1, 2]
	     */
	    function sortedUniq(array) {
	      return (array && array.length)
	        ? baseSortedUniq(array)
	        : [];
	    }

	    /**
	     * This method is like `_.uniqBy` except that it's designed and optimized
	     * for sorted arrays.
	     *
	     * @static
	     * @memberOf _
	     * @since 4.0.0
	     * @category Array
	     * @param {Array} array The array to inspect.
	     * @param {Function} [iteratee] The iteratee invoked per element.
	     * @returns {Array} Returns the new duplicate free array.
	     * @example
	     *
	     * _.sortedUniqBy([1.1, 1.2, 2.3, 2.4], Math.floor);
	     * // => [1.1, 2.3]
	     */
	    function sortedUniqBy(array, iteratee) {
	      return (array && array.length)
	        ? baseSortedUniqBy(array, getIteratee(iteratee))
	        : [];
	    }

	    /**
	     * Gets all but the first element of `array`.
	     *
	     * @static
	     * @memberOf _
	     * @since 4.0.0
	     * @category Array
	     * @param {Array} array The array to query.
	     * @returns {Array} Returns the slice of `array`.
	     * @example
	     *
	     * _.tail([1, 2, 3]);
	     * // => [2, 3]
	     */
	    function tail(array) {
	      return drop(array, 1);
	    }

	    /**
	     * Creates a slice of `array` with `n` elements taken from the beginning.
	     *
	     * @static
	     * @memberOf _
	     * @since 0.1.0
	     * @category Array
	     * @param {Array} array The array to query.
	     * @param {number} [n=1] The number of elements to take.
	     * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
	     * @returns {Array} Returns the slice of `array`.
	     * @example
	     *
	     * _.take([1, 2, 3]);
	     * // => [1]
	     *
	     * _.take([1, 2, 3], 2);
	     * // => [1, 2]
	     *
	     * _.take([1, 2, 3], 5);
	     * // => [1, 2, 3]
	     *
	     * _.take([1, 2, 3], 0);
	     * // => []
	     */
	    function take(array, n, guard) {
	      if (!(array && array.length)) {
	        return [];
	      }
	      n = (guard || n === undefined) ? 1 : toInteger(n);
	      return baseSlice(array, 0, n < 0 ? 0 : n);
	    }

	    /**
	     * Creates a slice of `array` with `n` elements taken from the end.
	     *
	     * @static
	     * @memberOf _
	     * @since 3.0.0
	     * @category Array
	     * @param {Array} array The array to query.
	     * @param {number} [n=1] The number of elements to take.
	     * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
	     * @returns {Array} Returns the slice of `array`.
	     * @example
	     *
	     * _.takeRight([1, 2, 3]);
	     * // => [3]
	     *
	     * _.takeRight([1, 2, 3], 2);
	     * // => [2, 3]
	     *
	     * _.takeRight([1, 2, 3], 5);
	     * // => [1, 2, 3]
	     *
	     * _.takeRight([1, 2, 3], 0);
	     * // => []
	     */
	    function takeRight(array, n, guard) {
	      var length = array ? array.length : 0;
	      if (!length) {
	        return [];
	      }
	      n = (guard || n === undefined) ? 1 : toInteger(n);
	      n = length - n;
	      return baseSlice(array, n < 0 ? 0 : n, length);
	    }

	    /**
	     * Creates a slice of `array` with elements taken from the end. Elements are
	     * taken until `predicate` returns falsey. The predicate is invoked with
	     * three arguments: (value, index, array).
	     *
	     * @static
	     * @memberOf _
	     * @since 3.0.0
	     * @category Array
	     * @param {Array} array The array to query.
	     * @param {Array|Function|Object|string} [predicate=_.identity]
	     *  The function invoked per iteration.
	     * @returns {Array} Returns the slice of `array`.
	     * @example
	     *
	     * var users = [
	     *   { 'user': 'barney',  'active': true },
	     *   { 'user': 'fred',    'active': false },
	     *   { 'user': 'pebbles', 'active': false }
	     * ];
	     *
	     * _.takeRightWhile(users, function(o) { return !o.active; });
	     * // => objects for ['fred', 'pebbles']
	     *
	     * // The `_.matches` iteratee shorthand.
	     * _.takeRightWhile(users, { 'user': 'pebbles', 'active': false });
	     * // => objects for ['pebbles']
	     *
	     * // The `_.matchesProperty` iteratee shorthand.
	     * _.takeRightWhile(users, ['active', false]);
	     * // => objects for ['fred', 'pebbles']
	     *
	     * // The `_.property` iteratee shorthand.
	     * _.takeRightWhile(users, 'active');
	     * // => []
	     */
	    function takeRightWhile(array, predicate) {
	      return (array && array.length)
	        ? baseWhile(array, getIteratee(predicate, 3), false, true)
	        : [];
	    }

	    /**
	     * Creates a slice of `array` with elements taken from the beginning. Elements
	     * are taken until `predicate` returns falsey. The predicate is invoked with
	     * three arguments: (value, index, array).
	     *
	     * @static
	     * @memberOf _
	     * @since 3.0.0
	     * @category Array
	     * @param {Array} array The array to query.
	     * @param {Array|Function|Object|string} [predicate=_.identity]
	     *  The function invoked per iteration.
	     * @returns {Array} Returns the slice of `array`.
	     * @example
	     *
	     * var users = [
	     *   { 'user': 'barney',  'active': false },
	     *   { 'user': 'fred',    'active': false},
	     *   { 'user': 'pebbles', 'active': true }
	     * ];
	     *
	     * _.takeWhile(users, function(o) { return !o.active; });
	     * // => objects for ['barney', 'fred']
	     *
	     * // The `_.matches` iteratee shorthand.
	     * _.takeWhile(users, { 'user': 'barney', 'active': false });
	     * // => objects for ['barney']
	     *
	     * // The `_.matchesProperty` iteratee shorthand.
	     * _.takeWhile(users, ['active', false]);
	     * // => objects for ['barney', 'fred']
	     *
	     * // The `_.property` iteratee shorthand.
	     * _.takeWhile(users, 'active');
	     * // => []
	     */
	    function takeWhile(array, predicate) {
	      return (array && array.length)
	        ? baseWhile(array, getIteratee(predicate, 3))
	        : [];
	    }

	    /**
	     * Creates an array of unique values, in order, from all given arrays using
	     * [`SameValueZero`](http://ecma-international.org/ecma-262/6.0/#sec-samevaluezero)
	     * for equality comparisons.
	     *
	     * @static
	     * @memberOf _
	     * @since 0.1.0
	     * @category Array
	     * @param {...Array} [arrays] The arrays to inspect.
	     * @returns {Array} Returns the new array of combined values.
	     * @example
	     *
	     * _.union([2, 1], [4, 2], [1, 2]);
	     * // => [2, 1, 4]
	     */
	    var union = rest(function(arrays) {
	      return baseUniq(baseFlatten(arrays, 1, isArrayLikeObject, true));
	    });

	    /**
	     * This method is like `_.union` except that it accepts `iteratee` which is
	     * invoked for each element of each `arrays` to generate the criterion by
	     * which uniqueness is computed. The iteratee is invoked with one argument:
	     * (value).
	     *
	     * @static
	     * @memberOf _
	     * @since 4.0.0
	     * @category Array
	     * @param {...Array} [arrays] The arrays to inspect.
	     * @param {Array|Function|Object|string} [iteratee=_.identity]
	     *  The iteratee invoked per element.
	     * @returns {Array} Returns the new array of combined values.
	     * @example
	     *
	     * _.unionBy([2.1, 1.2], [4.3, 2.4], Math.floor);
	     * // => [2.1, 1.2, 4.3]
	     *
	     * // The `_.property` iteratee shorthand.
	     * _.unionBy([{ 'x': 1 }], [{ 'x': 2 }, { 'x': 1 }], 'x');
	     * // => [{ 'x': 1 }, { 'x': 2 }]
	     */
	    var unionBy = rest(function(arrays) {
	      var iteratee = last(arrays);
	      if (isArrayLikeObject(iteratee)) {
	        iteratee = undefined;
	      }
	      return baseUniq(baseFlatten(arrays, 1, isArrayLikeObject, true), getIteratee(iteratee));
	    });

	    /**
	     * This method is like `_.union` except that it accepts `comparator` which
	     * is invoked to compare elements of `arrays`. The comparator is invoked
	     * with two arguments: (arrVal, othVal).
	     *
	     * @static
	     * @memberOf _
	     * @since 4.0.0
	     * @category Array
	     * @param {...Array} [arrays] The arrays to inspect.
	     * @param {Function} [comparator] The comparator invoked per element.
	     * @returns {Array} Returns the new array of combined values.
	     * @example
	     *
	     * var objects = [{ 'x': 1, 'y': 2 }, { 'x': 2, 'y': 1 }];
	     * var others = [{ 'x': 1, 'y': 1 }, { 'x': 1, 'y': 2 }];
	     *
	     * _.unionWith(objects, others, _.isEqual);
	     * // => [{ 'x': 1, 'y': 2 }, { 'x': 2, 'y': 1 }, { 'x': 1, 'y': 1 }]
	     */
	    var unionWith = rest(function(arrays) {
	      var comparator = last(arrays);
	      if (isArrayLikeObject(comparator)) {
	        comparator = undefined;
	      }
	      return baseUniq(baseFlatten(arrays, 1, isArrayLikeObject, true), undefined, comparator);
	    });

	    /**
	     * Creates a duplicate-free version of an array, using
	     * [`SameValueZero`](http://ecma-international.org/ecma-262/6.0/#sec-samevaluezero)
	     * for equality comparisons, in which only the first occurrence of each
	     * element is kept.
	     *
	     * @static
	     * @memberOf _
	     * @since 0.1.0
	     * @category Array
	     * @param {Array} array The array to inspect.
	     * @returns {Array} Returns the new duplicate free array.
	     * @example
	     *
	     * _.uniq([2, 1, 2]);
	     * // => [2, 1]
	     */
	    function uniq(array) {
	      return (array && array.length)
	        ? baseUniq(array)
	        : [];
	    }

	    /**
	     * This method is like `_.uniq` except that it accepts `iteratee` which is
	     * invoked for each element in `array` to generate the criterion by which
	     * uniqueness is computed. The iteratee is invoked with one argument: (value).
	     *
	     * @static
	     * @memberOf _
	     * @since 4.0.0
	     * @category Array
	     * @param {Array} array The array to inspect.
	     * @param {Array|Function|Object|string} [iteratee=_.identity]
	     *  The iteratee invoked per element.
	     * @returns {Array} Returns the new duplicate free array.
	     * @example
	     *
	     * _.uniqBy([2.1, 1.2, 2.3], Math.floor);
	     * // => [2.1, 1.2]
	     *
	     * // The `_.property` iteratee shorthand.
	     * _.uniqBy([{ 'x': 1 }, { 'x': 2 }, { 'x': 1 }], 'x');
	     * // => [{ 'x': 1 }, { 'x': 2 }]
	     */
	    function uniqBy(array, iteratee) {
	      return (array && array.length)
	        ? baseUniq(array, getIteratee(iteratee))
	        : [];
	    }

	    /**
	     * This method is like `_.uniq` except that it accepts `comparator` which
	     * is invoked to compare elements of `array`. The comparator is invoked with
	     * two arguments: (arrVal, othVal).
	     *
	     * @static
	     * @memberOf _
	     * @since 4.0.0
	     * @category Array
	     * @param {Array} array The array to inspect.
	     * @param {Function} [comparator] The comparator invoked per element.
	     * @returns {Array} Returns the new duplicate free array.
	     * @example
	     *
	     * var objects = [{ 'x': 1, 'y': 2 }, { 'x': 2, 'y': 1 },  { 'x': 1, 'y': 2 }];
	     *
	     * _.uniqWith(objects, _.isEqual);
	     * // => [{ 'x': 1, 'y': 2 }, { 'x': 2, 'y': 1 }]
	     */
	    function uniqWith(array, comparator) {
	      return (array && array.length)
	        ? baseUniq(array, undefined, comparator)
	        : [];
	    }

	    /**
	     * This method is like `_.zip` except that it accepts an array of grouped
	     * elements and creates an array regrouping the elements to their pre-zip
	     * configuration.
	     *
	     * @static
	     * @memberOf _
	     * @since 1.2.0
	     * @category Array
	     * @param {Array} array The array of grouped elements to process.
	     * @returns {Array} Returns the new array of regrouped elements.
	     * @example
	     *
	     * var zipped = _.zip(['fred', 'barney'], [30, 40], [true, false]);
	     * // => [['fred', 30, true], ['barney', 40, false]]
	     *
	     * _.unzip(zipped);
	     * // => [['fred', 'barney'], [30, 40], [true, false]]
	     */
	    function unzip(array) {
	      if (!(array && array.length)) {
	        return [];
	      }
	      var length = 0;
	      array = arrayFilter(array, function(group) {
	        if (isArrayLikeObject(group)) {
	          length = nativeMax(group.length, length);
	          return true;
	        }
	      });
	      return baseTimes(length, function(index) {
	        return arrayMap(array, baseProperty(index));
	      });
	    }

	    /**
	     * This method is like `_.unzip` except that it accepts `iteratee` to specify
	     * how regrouped values should be combined. The iteratee is invoked with the
	     * elements of each group: (...group).
	     *
	     * @static
	     * @memberOf _
	     * @since 3.8.0
	     * @category Array
	     * @param {Array} array The array of grouped elements to process.
	     * @param {Function} [iteratee=_.identity] The function to combine
	     *  regrouped values.
	     * @returns {Array} Returns the new array of regrouped elements.
	     * @example
	     *
	     * var zipped = _.zip([1, 2], [10, 20], [100, 200]);
	     * // => [[1, 10, 100], [2, 20, 200]]
	     *
	     * _.unzipWith(zipped, _.add);
	     * // => [3, 30, 300]
	     */
	    function unzipWith(array, iteratee) {
	      if (!(array && array.length)) {
	        return [];
	      }
	      var result = unzip(array);
	      if (iteratee == null) {
	        return result;
	      }
	      return arrayMap(result, function(group) {
	        return apply(iteratee, undefined, group);
	      });
	    }

	    /**
	     * Creates an array excluding all given values using
	     * [`SameValueZero`](http://ecma-international.org/ecma-262/6.0/#sec-samevaluezero)
	     * for equality comparisons.
	     *
	     * @static
	     * @memberOf _
	     * @since 0.1.0
	     * @category Array
	     * @param {Array} array The array to filter.
	     * @param {...*} [values] The values to exclude.
	     * @returns {Array} Returns the new array of filtered values.
	     * @example
	     *
	     * _.without([1, 2, 1, 3], 1, 2);
	     * // => [3]
	     */
	    var without = rest(function(array, values) {
	      return isArrayLikeObject(array)
	        ? baseDifference(array, values)
	        : [];
	    });

	    /**
	     * Creates an array of unique values that is the
	     * [symmetric difference](https://en.wikipedia.org/wiki/Symmetric_difference)
	     * of the given arrays. The order of result values is determined by the order
	     * they occur in the arrays.
	     *
	     * @static
	     * @memberOf _
	     * @since 2.4.0
	     * @category Array
	     * @param {...Array} [arrays] The arrays to inspect.
	     * @returns {Array} Returns the new array of values.
	     * @example
	     *
	     * _.xor([2, 1], [4, 2]);
	     * // => [1, 4]
	     */
	    var xor = rest(function(arrays) {
	      return baseXor(arrayFilter(arrays, isArrayLikeObject));
	    });

	    /**
	     * This method is like `_.xor` except that it accepts `iteratee` which is
	     * invoked for each element of each `arrays` to generate the criterion by
	     * which by which they're compared. The iteratee is invoked with one argument:
	     * (value).
	     *
	     * @static
	     * @memberOf _
	     * @since 4.0.0
	     * @category Array
	     * @param {...Array} [arrays] The arrays to inspect.
	     * @param {Array|Function|Object|string} [iteratee=_.identity]
	     *  The iteratee invoked per element.
	     * @returns {Array} Returns the new array of values.
	     * @example
	     *
	     * _.xorBy([2.1, 1.2], [4.3, 2.4], Math.floor);
	     * // => [1.2, 4.3]
	     *
	     * // The `_.property` iteratee shorthand.
	     * _.xorBy([{ 'x': 1 }], [{ 'x': 2 }, { 'x': 1 }], 'x');
	     * // => [{ 'x': 2 }]
	     */
	    var xorBy = rest(function(arrays) {
	      var iteratee = last(arrays);
	      if (isArrayLikeObject(iteratee)) {
	        iteratee = undefined;
	      }
	      return baseXor(arrayFilter(arrays, isArrayLikeObject), getIteratee(iteratee));
	    });

	    /**
	     * This method is like `_.xor` except that it accepts `comparator` which is
	     * invoked to compare elements of `arrays`. The comparator is invoked with
	     * two arguments: (arrVal, othVal).
	     *
	     * @static
	     * @memberOf _
	     * @since 4.0.0
	     * @category Array
	     * @param {...Array} [arrays] The arrays to inspect.
	     * @param {Function} [comparator] The comparator invoked per element.
	     * @returns {Array} Returns the new array of values.
	     * @example
	     *
	     * var objects = [{ 'x': 1, 'y': 2 }, { 'x': 2, 'y': 1 }];
	     * var others = [{ 'x': 1, 'y': 1 }, { 'x': 1, 'y': 2 }];
	     *
	     * _.xorWith(objects, others, _.isEqual);
	     * // => [{ 'x': 2, 'y': 1 }, { 'x': 1, 'y': 1 }]
	     */
	    var xorWith = rest(function(arrays) {
	      var comparator = last(arrays);
	      if (isArrayLikeObject(comparator)) {
	        comparator = undefined;
	      }
	      return baseXor(arrayFilter(arrays, isArrayLikeObject), undefined, comparator);
	    });

	    /**
	     * Creates an array of grouped elements, the first of which contains the
	     * first elements of the given arrays, the second of which contains the
	     * second elements of the given arrays, and so on.
	     *
	     * @static
	     * @memberOf _
	     * @since 0.1.0
	     * @category Array
	     * @param {...Array} [arrays] The arrays to process.
	     * @returns {Array} Returns the new array of grouped elements.
	     * @example
	     *
	     * _.zip(['fred', 'barney'], [30, 40], [true, false]);
	     * // => [['fred', 30, true], ['barney', 40, false]]
	     */
	    var zip = rest(unzip);

	    /**
	     * This method is like `_.fromPairs` except that it accepts two arrays,
	     * one of property identifiers and one of corresponding values.
	     *
	     * @static
	     * @memberOf _
	     * @since 0.4.0
	     * @category Array
	     * @param {Array} [props=[]] The property identifiers.
	     * @param {Array} [values=[]] The property values.
	     * @returns {Object} Returns the new object.
	     * @example
	     *
	     * _.zipObject(['a', 'b'], [1, 2]);
	     * // => { 'a': 1, 'b': 2 }
	     */
	    function zipObject(props, values) {
	      return baseZipObject(props || [], values || [], assignValue);
	    }

	    /**
	     * This method is like `_.zipObject` except that it supports property paths.
	     *
	     * @static
	     * @memberOf _
	     * @since 4.1.0
	     * @category Array
	     * @param {Array} [props=[]] The property identifiers.
	     * @param {Array} [values=[]] The property values.
	     * @returns {Object} Returns the new object.
	     * @example
	     *
	     * _.zipObjectDeep(['a.b[0].c', 'a.b[1].d'], [1, 2]);
	     * // => { 'a': { 'b': [{ 'c': 1 }, { 'd': 2 }] } }
	     */
	    function zipObjectDeep(props, values) {
	      return baseZipObject(props || [], values || [], baseSet);
	    }

	    /**
	     * This method is like `_.zip` except that it accepts `iteratee` to specify
	     * how grouped values should be combined. The iteratee is invoked with the
	     * elements of each group: (...group).
	     *
	     * @static
	     * @memberOf _
	     * @since 3.8.0
	     * @category Array
	     * @param {...Array} [arrays] The arrays to process.
	     * @param {Function} [iteratee=_.identity] The function to combine grouped values.
	     * @returns {Array} Returns the new array of grouped elements.
	     * @example
	     *
	     * _.zipWith([1, 2], [10, 20], [100, 200], function(a, b, c) {
	     *   return a + b + c;
	     * });
	     * // => [111, 222]
	     */
	    var zipWith = rest(function(arrays) {
	      var length = arrays.length,
	          iteratee = length > 1 ? arrays[length - 1] : undefined;

	      iteratee = typeof iteratee == 'function' ? (arrays.pop(), iteratee) : undefined;
	      return unzipWith(arrays, iteratee);
	    });

	    /*------------------------------------------------------------------------*/

	    /**
	     * Creates a `lodash` wrapper instance that wraps `value` with explicit method
	     * chain sequences enabled. The result of such sequences must be unwrapped
	     * with `_#value`.
	     *
	     * @static
	     * @memberOf _
	     * @since 1.3.0
	     * @category Seq
	     * @param {*} value The value to wrap.
	     * @returns {Object} Returns the new `lodash` wrapper instance.
	     * @example
	     *
	     * var users = [
	     *   { 'user': 'barney',  'age': 36 },
	     *   { 'user': 'fred',    'age': 40 },
	     *   { 'user': 'pebbles', 'age': 1 }
	     * ];
	     *
	     * var youngest = _
	     *   .chain(users)
	     *   .sortBy('age')
	     *   .map(function(o) {
	     *     return o.user + ' is ' + o.age;
	     *   })
	     *   .head()
	     *   .value();
	     * // => 'pebbles is 1'
	     */
	    function chain(value) {
	      var result = lodash(value);
	      result.__chain__ = true;
	      return result;
	    }

	    /**
	     * This method invokes `interceptor` and returns `value`. The interceptor
	     * is invoked with one argument; (value). The purpose of this method is to
	     * "tap into" a method chain sequence in order to modify intermediate results.
	     *
	     * @static
	     * @memberOf _
	     * @since 0.1.0
	     * @category Seq
	     * @param {*} value The value to provide to `interceptor`.
	     * @param {Function} interceptor The function to invoke.
	     * @returns {*} Returns `value`.
	     * @example
	     *
	     * _([1, 2, 3])
	     *  .tap(function(array) {
	     *    // Mutate input array.
	     *    array.pop();
	     *  })
	     *  .reverse()
	     *  .value();
	     * // => [2, 1]
	     */
	    function tap(value, interceptor) {
	      interceptor(value);
	      return value;
	    }

	    /**
	     * This method is like `_.tap` except that it returns the result of `interceptor`.
	     * The purpose of this method is to "pass thru" values replacing intermediate
	     * results in a method chain sequence.
	     *
	     * @static
	     * @memberOf _
	     * @since 3.0.0
	     * @category Seq
	     * @param {*} value The value to provide to `interceptor`.
	     * @param {Function} interceptor The function to invoke.
	     * @returns {*} Returns the result of `interceptor`.
	     * @example
	     *
	     * _('  abc  ')
	     *  .chain()
	     *  .trim()
	     *  .thru(function(value) {
	     *    return [value];
	     *  })
	     *  .value();
	     * // => ['abc']
	     */
	    function thru(value, interceptor) {
	      return interceptor(value);
	    }

	    /**
	     * This method is the wrapper version of `_.at`.
	     *
	     * @name at
	     * @memberOf _
	     * @since 1.0.0
	     * @category Seq
	     * @param {...(string|string[])} [paths] The property paths of elements to pick.
	     * @returns {Object} Returns the new `lodash` wrapper instance.
	     * @example
	     *
	     * var object = { 'a': [{ 'b': { 'c': 3 } }, 4] };
	     *
	     * _(object).at(['a[0].b.c', 'a[1]']).value();
	     * // => [3, 4]
	     *
	     * _(['a', 'b', 'c']).at(0, 2).value();
	     * // => ['a', 'c']
	     */
	    var wrapperAt = rest(function(paths) {
	      paths = baseFlatten(paths, 1);
	      var length = paths.length,
	          start = length ? paths[0] : 0,
	          value = this.__wrapped__,
	          interceptor = function(object) { return baseAt(object, paths); };

	      if (length > 1 || this.__actions__.length ||
	          !(value instanceof LazyWrapper) || !isIndex(start)) {
	        return this.thru(interceptor);
	      }
	      value = value.slice(start, +start + (length ? 1 : 0));
	      value.__actions__.push({
	        'func': thru,
	        'args': [interceptor],
	        'thisArg': undefined
	      });
	      return new LodashWrapper(value, this.__chain__).thru(function(array) {
	        if (length && !array.length) {
	          array.push(undefined);
	        }
	        return array;
	      });
	    });

	    /**
	     * Creates a `lodash` wrapper instance with explicit method chain sequences enabled.
	     *
	     * @name chain
	     * @memberOf _
	     * @since 0.1.0
	     * @category Seq
	     * @returns {Object} Returns the new `lodash` wrapper instance.
	     * @example
	     *
	     * var users = [
	     *   { 'user': 'barney', 'age': 36 },
	     *   { 'user': 'fred',   'age': 40 }
	     * ];
	     *
	     * // A sequence without explicit chaining.
	     * _(users).head();
	     * // => { 'user': 'barney', 'age': 36 }
	     *
	     * // A sequence with explicit chaining.
	     * _(users)
	     *   .chain()
	     *   .head()
	     *   .pick('user')
	     *   .value();
	     * // => { 'user': 'barney' }
	     */
	    function wrapperChain() {
	      return chain(this);
	    }

	    /**
	     * Executes the chain sequence and returns the wrapped result.
	     *
	     * @name commit
	     * @memberOf _
	     * @since 3.2.0
	     * @category Seq
	     * @returns {Object} Returns the new `lodash` wrapper instance.
	     * @example
	     *
	     * var array = [1, 2];
	     * var wrapped = _(array).push(3);
	     *
	     * console.log(array);
	     * // => [1, 2]
	     *
	     * wrapped = wrapped.commit();
	     * console.log(array);
	     * // => [1, 2, 3]
	     *
	     * wrapped.last();
	     * // => 3
	     *
	     * console.log(array);
	     * // => [1, 2, 3]
	     */
	    function wrapperCommit() {
	      return new LodashWrapper(this.value(), this.__chain__);
	    }

	    /**
	     * Gets the next value on a wrapped object following the
	     * [iterator protocol](https://mdn.io/iteration_protocols#iterator).
	     *
	     * @name next
	     * @memberOf _
	     * @since 4.0.0
	     * @category Seq
	     * @returns {Object} Returns the next iterator value.
	     * @example
	     *
	     * var wrapped = _([1, 2]);
	     *
	     * wrapped.next();
	     * // => { 'done': false, 'value': 1 }
	     *
	     * wrapped.next();
	     * // => { 'done': false, 'value': 2 }
	     *
	     * wrapped.next();
	     * // => { 'done': true, 'value': undefined }
	     */
	    function wrapperNext() {
	      if (this.__values__ === undefined) {
	        this.__values__ = toArray(this.value());
	      }
	      var done = this.__index__ >= this.__values__.length,
	          value = done ? undefined : this.__values__[this.__index__++];

	      return { 'done': done, 'value': value };
	    }

	    /**
	     * Enables the wrapper to be iterable.
	     *
	     * @name Symbol.iterator
	     * @memberOf _
	     * @since 4.0.0
	     * @category Seq
	     * @returns {Object} Returns the wrapper object.
	     * @example
	     *
	     * var wrapped = _([1, 2]);
	     *
	     * wrapped[Symbol.iterator]() === wrapped;
	     * // => true
	     *
	     * Array.from(wrapped);
	     * // => [1, 2]
	     */
	    function wrapperToIterator() {
	      return this;
	    }

	    /**
	     * Creates a clone of the chain sequence planting `value` as the wrapped value.
	     *
	     * @name plant
	     * @memberOf _
	     * @since 3.2.0
	     * @category Seq
	     * @param {*} value The value to plant.
	     * @returns {Object} Returns the new `lodash` wrapper instance.
	     * @example
	     *
	     * function square(n) {
	     *   return n * n;
	     * }
	     *
	     * var wrapped = _([1, 2]).map(square);
	     * var other = wrapped.plant([3, 4]);
	     *
	     * other.value();
	     * // => [9, 16]
	     *
	     * wrapped.value();
	     * // => [1, 4]
	     */
	    function wrapperPlant(value) {
	      var result,
	          parent = this;

	      while (parent instanceof baseLodash) {
	        var clone = wrapperClone(parent);
	        clone.__index__ = 0;
	        clone.__values__ = undefined;
	        if (result) {
	          previous.__wrapped__ = clone;
	        } else {
	          result = clone;
	        }
	        var previous = clone;
	        parent = parent.__wrapped__;
	      }
	      previous.__wrapped__ = value;
	      return result;
	    }

	    /**
	     * This method is the wrapper version of `_.reverse`.
	     *
	     * **Note:** This method mutates the wrapped array.
	     *
	     * @name reverse
	     * @memberOf _
	     * @since 0.1.0
	     * @category Seq
	     * @returns {Object} Returns the new `lodash` wrapper instance.
	     * @example
	     *
	     * var array = [1, 2, 3];
	     *
	     * _(array).reverse().value()
	     * // => [3, 2, 1]
	     *
	     * console.log(array);
	     * // => [3, 2, 1]
	     */
	    function wrapperReverse() {
	      var value = this.__wrapped__;
	      if (value instanceof LazyWrapper) {
	        var wrapped = value;
	        if (this.__actions__.length) {
	          wrapped = new LazyWrapper(this);
	        }
	        wrapped = wrapped.reverse();
	        wrapped.__actions__.push({
	          'func': thru,
	          'args': [reverse],
	          'thisArg': undefined
	        });
	        return new LodashWrapper(wrapped, this.__chain__);
	      }
	      return this.thru(reverse);
	    }

	    /**
	     * Executes the chain sequence to resolve the unwrapped value.
	     *
	     * @name value
	     * @memberOf _
	     * @since 0.1.0
	     * @alias toJSON, valueOf
	     * @category Seq
	     * @returns {*} Returns the resolved unwrapped value.
	     * @example
	     *
	     * _([1, 2, 3]).value();
	     * // => [1, 2, 3]
	     */
	    function wrapperValue() {
	      return baseWrapperValue(this.__wrapped__, this.__actions__);
	    }

	    /*------------------------------------------------------------------------*/

	    /**
	     * Creates an object composed of keys generated from the results of running
	     * each element of `collection` thru `iteratee`. The corresponding value of
	     * each key is the number of times the key was returned by `iteratee`. The
	     * iteratee is invoked with one argument: (value).
	     *
	     * @static
	     * @memberOf _
	     * @since 0.5.0
	     * @category Collection
	     * @param {Array|Object} collection The collection to iterate over.
	     * @param {Array|Function|Object|string} [iteratee=_.identity]
	     *  The iteratee to transform keys.
	     * @returns {Object} Returns the composed aggregate object.
	     * @example
	     *
	     * _.countBy([6.1, 4.2, 6.3], Math.floor);
	     * // => { '4': 1, '6': 2 }
	     *
	     * _.countBy(['one', 'two', 'three'], 'length');
	     * // => { '3': 2, '5': 1 }
	     */
	    var countBy = createAggregator(function(result, value, key) {
	      hasOwnProperty.call(result, key) ? ++result[key] : (result[key] = 1);
	    });

	    /**
	     * Checks if `predicate` returns truthy for **all** elements of `collection`.
	     * Iteration is stopped once `predicate` returns falsey. The predicate is
	     * invoked with three arguments: (value, index|key, collection).
	     *
	     * @static
	     * @memberOf _
	     * @since 0.1.0
	     * @category Collection
	     * @param {Array|Object} collection The collection to iterate over.
	     * @param {Array|Function|Object|string} [predicate=_.identity]
	     *  The function invoked per iteration.
	     * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
	     * @returns {boolean} Returns `true` if all elements pass the predicate check,
	     *  else `false`.
	     * @example
	     *
	     * _.every([true, 1, null, 'yes'], Boolean);
	     * // => false
	     *
	     * var users = [
	     *   { 'user': 'barney', 'age': 36, 'active': false },
	     *   { 'user': 'fred',   'age': 40, 'active': false }
	     * ];
	     *
	     * // The `_.matches` iteratee shorthand.
	     * _.every(users, { 'user': 'barney', 'active': false });
	     * // => false
	     *
	     * // The `_.matchesProperty` iteratee shorthand.
	     * _.every(users, ['active', false]);
	     * // => true
	     *
	     * // The `_.property` iteratee shorthand.
	     * _.every(users, 'active');
	     * // => false
	     */
	    function every(collection, predicate, guard) {
	      var func = isArray(collection) ? arrayEvery : baseEvery;
	      if (guard && isIterateeCall(collection, predicate, guard)) {
	        predicate = undefined;
	      }
	      return func(collection, getIteratee(predicate, 3));
	    }

	    /**
	     * Iterates over elements of `collection`, returning an array of all elements
	     * `predicate` returns truthy for. The predicate is invoked with three
	     * arguments: (value, index|key, collection).
	     *
	     * @static
	     * @memberOf _
	     * @since 0.1.0
	     * @category Collection
	     * @param {Array|Object} collection The collection to iterate over.
	     * @param {Array|Function|Object|string} [predicate=_.identity]
	     *  The function invoked per iteration.
	     * @returns {Array} Returns the new filtered array.
	     * @example
	     *
	     * var users = [
	     *   { 'user': 'barney', 'age': 36, 'active': true },
	     *   { 'user': 'fred',   'age': 40, 'active': false }
	     * ];
	     *
	     * _.filter(users, function(o) { return !o.active; });
	     * // => objects for ['fred']
	     *
	     * // The `_.matches` iteratee shorthand.
	     * _.filter(users, { 'age': 36, 'active': true });
	     * // => objects for ['barney']
	     *
	     * // The `_.matchesProperty` iteratee shorthand.
	     * _.filter(users, ['active', false]);
	     * // => objects for ['fred']
	     *
	     * // The `_.property` iteratee shorthand.
	     * _.filter(users, 'active');
	     * // => objects for ['barney']
	     */
	    function filter(collection, predicate) {
	      var func = isArray(collection) ? arrayFilter : baseFilter;
	      return func(collection, getIteratee(predicate, 3));
	    }

	    /**
	     * Iterates over elements of `collection`, returning the first element
	     * `predicate` returns truthy for. The predicate is invoked with three
	     * arguments: (value, index|key, collection).
	     *
	     * @static
	     * @memberOf _
	     * @since 0.1.0
	     * @category Collection
	     * @param {Array|Object} collection The collection to search.
	     * @param {Array|Function|Object|string} [predicate=_.identity]
	     *  The function invoked per iteration.
	     * @returns {*} Returns the matched element, else `undefined`.
	     * @example
	     *
	     * var users = [
	     *   { 'user': 'barney',  'age': 36, 'active': true },
	     *   { 'user': 'fred',    'age': 40, 'active': false },
	     *   { 'user': 'pebbles', 'age': 1,  'active': true }
	     * ];
	     *
	     * _.find(users, function(o) { return o.age < 40; });
	     * // => object for 'barney'
	     *
	     * // The `_.matches` iteratee shorthand.
	     * _.find(users, { 'age': 1, 'active': true });
	     * // => object for 'pebbles'
	     *
	     * // The `_.matchesProperty` iteratee shorthand.
	     * _.find(users, ['active', false]);
	     * // => object for 'fred'
	     *
	     * // The `_.property` iteratee shorthand.
	     * _.find(users, 'active');
	     * // => object for 'barney'
	     */
	    function find(collection, predicate) {
	      predicate = getIteratee(predicate, 3);
	      if (isArray(collection)) {
	        var index = baseFindIndex(collection, predicate);
	        return index > -1 ? collection[index] : undefined;
	      }
	      return baseFind(collection, predicate, baseEach);
	    }

	    /**
	     * This method is like `_.find` except that it iterates over elements of
	     * `collection` from right to left.
	     *
	     * @static
	     * @memberOf _
	     * @since 2.0.0
	     * @category Collection
	     * @param {Array|Object} collection The collection to search.
	     * @param {Array|Function|Object|string} [predicate=_.identity]
	     *  The function invoked per iteration.
	     * @returns {*} Returns the matched element, else `undefined`.
	     * @example
	     *
	     * _.findLast([1, 2, 3, 4], function(n) {
	     *   return n % 2 == 1;
	     * });
	     * // => 3
	     */
	    function findLast(collection, predicate) {
	      predicate = getIteratee(predicate, 3);
	      if (isArray(collection)) {
	        var index = baseFindIndex(collection, predicate, true);
	        return index > -1 ? collection[index] : undefined;
	      }
	      return baseFind(collection, predicate, baseEachRight);
	    }

	    /**
	     * Creates a flattened array of values by running each element in `collection`
	     * thru `iteratee` and flattening the mapped results. The iteratee is invoked
	     * with three arguments: (value, index|key, collection).
	     *
	     * @static
	     * @memberOf _
	     * @since 4.0.0
	     * @category Collection
	     * @param {Array|Object} collection The collection to iterate over.
	     * @param {Array|Function|Object|string} [iteratee=_.identity]
	     *  The function invoked per iteration.
	     * @returns {Array} Returns the new flattened array.
	     * @example
	     *
	     * function duplicate(n) {
	     *   return [n, n];
	     * }
	     *
	     * _.flatMap([1, 2], duplicate);
	     * // => [1, 1, 2, 2]
	     */
	    function flatMap(collection, iteratee) {
	      return baseFlatten(map(collection, iteratee), 1);
	    }

	    /**
	     * This method is like `_.flatMap` except that it recursively flattens the
	     * mapped results.
	     *
	     * @static
	     * @memberOf _
	     * @since 4.7.0
	     * @category Collection
	     * @param {Array|Object} collection The collection to iterate over.
	     * @param {Array|Function|Object|string} [iteratee=_.identity]
	     *  The function invoked per iteration.
	     * @returns {Array} Returns the new flattened array.
	     * @example
	     *
	     * function duplicate(n) {
	     *   return [[[n, n]]];
	     * }
	     *
	     * _.flatMapDeep([1, 2], duplicate);
	     * // => [1, 1, 2, 2]
	     */
	    function flatMapDeep(collection, iteratee) {
	      return baseFlatten(map(collection, iteratee), INFINITY);
	    }

	    /**
	     * This method is like `_.flatMap` except that it recursively flattens the
	     * mapped results up to `depth` times.
	     *
	     * @static
	     * @memberOf _
	     * @since 4.7.0
	     * @category Collection
	     * @param {Array|Object} collection The collection to iterate over.
	     * @param {Array|Function|Object|string} [iteratee=_.identity]
	     *  The function invoked per iteration.
	     * @param {number} [depth=1] The maximum recursion depth.
	     * @returns {Array} Returns the new flattened array.
	     * @example
	     *
	     * function duplicate(n) {
	     *   return [[[n, n]]];
	     * }
	     *
	     * _.flatMapDepth([1, 2], duplicate, 2);
	     * // => [[1, 1], [2, 2]]
	     */
	    function flatMapDepth(collection, iteratee, depth) {
	      depth = depth === undefined ? 1 : toInteger(depth);
	      return baseFlatten(map(collection, iteratee), depth);
	    }

	    /**
	     * Iterates over elements of `collection` and invokes `iteratee` for each element.
	     * The iteratee is invoked with three arguments: (value, index|key, collection).
	     * Iteratee functions may exit iteration early by explicitly returning `false`.
	     *
	     * **Note:** As with other "Collections" methods, objects with a "length"
	     * property are iterated like arrays. To avoid this behavior use `_.forIn`
	     * or `_.forOwn` for object iteration.
	     *
	     * @static
	     * @memberOf _
	     * @since 0.1.0
	     * @alias each
	     * @category Collection
	     * @param {Array|Object} collection The collection to iterate over.
	     * @param {Function} [iteratee=_.identity] The function invoked per iteration.
	     * @returns {Array|Object} Returns `collection`.
	     * @example
	     *
	     * _([1, 2]).forEach(function(value) {
	     *   console.log(value);
	     * });
	     * // => Logs `1` then `2`.
	     *
	     * _.forEach({ 'a': 1, 'b': 2 }, function(value, key) {
	     *   console.log(key);
	     * });
	     * // => Logs 'a' then 'b' (iteration order is not guaranteed).
	     */
	    function forEach(collection, iteratee) {
	      return (typeof iteratee == 'function' && isArray(collection))
	        ? arrayEach(collection, iteratee)
	        : baseEach(collection, getIteratee(iteratee));
	    }

	    /**
	     * This method is like `_.forEach` except that it iterates over elements of
	     * `collection` from right to left.
	     *
	     * @static
	     * @memberOf _
	     * @since 2.0.0
	     * @alias eachRight
	     * @category Collection
	     * @param {Array|Object} collection The collection to iterate over.
	     * @param {Function} [iteratee=_.identity] The function invoked per iteration.
	     * @returns {Array|Object} Returns `collection`.
	     * @example
	     *
	     * _.forEachRight([1, 2], function(value) {
	     *   console.log(value);
	     * });
	     * // => Logs `2` then `1`.
	     */
	    function forEachRight(collection, iteratee) {
	      return (typeof iteratee == 'function' && isArray(collection))
	        ? arrayEachRight(collection, iteratee)
	        : baseEachRight(collection, getIteratee(iteratee));
	    }

	    /**
	     * Creates an object composed of keys generated from the results of running
	     * each element of `collection` thru `iteratee`. The order of grouped values
	     * is determined by the order they occur in `collection`. The corresponding
	     * value of each key is an array of elements responsible for generating the
	     * key. The iteratee is invoked with one argument: (value).
	     *
	     * @static
	     * @memberOf _
	     * @since 0.1.0
	     * @category Collection
	     * @param {Array|Object} collection The collection to iterate over.
	     * @param {Array|Function|Object|string} [iteratee=_.identity]
	     *  The iteratee to transform keys.
	     * @returns {Object} Returns the composed aggregate object.
	     * @example
	     *
	     * _.groupBy([6.1, 4.2, 6.3], Math.floor);
	     * // => { '4': [4.2], '6': [6.1, 6.3] }
	     *
	     * // The `_.property` iteratee shorthand.
	     * _.groupBy(['one', 'two', 'three'], 'length');
	     * // => { '3': ['one', 'two'], '5': ['three'] }
	     */
	    var groupBy = createAggregator(function(result, value, key) {
	      if (hasOwnProperty.call(result, key)) {
	        result[key].push(value);
	      } else {
	        result[key] = [value];
	      }
	    });

	    /**
	     * Checks if `value` is in `collection`. If `collection` is a string, it's
	     * checked for a substring of `value`, otherwise
	     * [`SameValueZero`](http://ecma-international.org/ecma-262/6.0/#sec-samevaluezero)
	     * is used for equality comparisons. If `fromIndex` is negative, it's used as
	     * the offset from the end of `collection`.
	     *
	     * @static
	     * @memberOf _
	     * @since 0.1.0
	     * @category Collection
	     * @param {Array|Object|string} collection The collection to search.
	     * @param {*} value The value to search for.
	     * @param {number} [fromIndex=0] The index to search from.
	     * @param- {Object} [guard] Enables use as an iteratee for methods like `_.reduce`.
	     * @returns {boolean} Returns `true` if `value` is found, else `false`.
	     * @example
	     *
	     * _.includes([1, 2, 3], 1);
	     * // => true
	     *
	     * _.includes([1, 2, 3], 1, 2);
	     * // => false
	     *
	     * _.includes({ 'user': 'fred', 'age': 40 }, 'fred');
	     * // => true
	     *
	     * _.includes('pebbles', 'eb');
	     * // => true
	     */
	    function includes(collection, value, fromIndex, guard) {
	      collection = isArrayLike(collection) ? collection : values(collection);
	      fromIndex = (fromIndex && !guard) ? toInteger(fromIndex) : 0;

	      var length = collection.length;
	      if (fromIndex < 0) {
	        fromIndex = nativeMax(length + fromIndex, 0);
	      }
	      return isString(collection)
	        ? (fromIndex <= length && collection.indexOf(value, fromIndex) > -1)
	        : (!!length && baseIndexOf(collection, value, fromIndex) > -1);
	    }

	    /**
	     * Invokes the method at `path` of each element in `collection`, returning
	     * an array of the results of each invoked method. Any additional arguments
	     * are provided to each invoked method. If `methodName` is a function, it's
	     * invoked for and `this` bound to, each element in `collection`.
	     *
	     * @static
	     * @memberOf _
	     * @since 4.0.0
	     * @category Collection
	     * @param {Array|Object} collection The collection to iterate over.
	     * @param {Array|Function|string} path The path of the method to invoke or
	     *  the function invoked per iteration.
	     * @param {...*} [args] The arguments to invoke each method with.
	     * @returns {Array} Returns the array of results.
	     * @example
	     *
	     * _.invokeMap([[5, 1, 7], [3, 2, 1]], 'sort');
	     * // => [[1, 5, 7], [1, 2, 3]]
	     *
	     * _.invokeMap([123, 456], String.prototype.split, '');
	     * // => [['1', '2', '3'], ['4', '5', '6']]
	     */
	    var invokeMap = rest(function(collection, path, args) {
	      var index = -1,
	          isFunc = typeof path == 'function',
	          isProp = isKey(path),
	          result = isArrayLike(collection) ? Array(collection.length) : [];

	      baseEach(collection, function(value) {
	        var func = isFunc ? path : ((isProp && value != null) ? value[path] : undefined);
	        result[++index] = func ? apply(func, value, args) : baseInvoke(value, path, args);
	      });
	      return result;
	    });

	    /**
	     * Creates an object composed of keys generated from the results of running
	     * each element of `collection` thru `iteratee`. The corresponding value of
	     * each key is the last element responsible for generating the key. The
	     * iteratee is invoked with one argument: (value).
	     *
	     * @static
	     * @memberOf _
	     * @since 4.0.0
	     * @category Collection
	     * @param {Array|Object} collection The collection to iterate over.
	     * @param {Array|Function|Object|string} [iteratee=_.identity]
	     *  The iteratee to transform keys.
	     * @returns {Object} Returns the composed aggregate object.
	     * @example
	     *
	     * var array = [
	     *   { 'dir': 'left', 'code': 97 },
	     *   { 'dir': 'right', 'code': 100 }
	     * ];
	     *
	     * _.keyBy(array, function(o) {
	     *   return String.fromCharCode(o.code);
	     * });
	     * // => { 'a': { 'dir': 'left', 'code': 97 }, 'd': { 'dir': 'right', 'code': 100 } }
	     *
	     * _.keyBy(array, 'dir');
	     * // => { 'left': { 'dir': 'left', 'code': 97 }, 'right': { 'dir': 'right', 'code': 100 } }
	     */
	    var keyBy = createAggregator(function(result, value, key) {
	      result[key] = value;
	    });

	    /**
	     * Creates an array of values by running each element in `collection` thru
	     * `iteratee`. The iteratee is invoked with three arguments:
	     * (value, index|key, collection).
	     *
	     * Many lodash methods are guarded to work as iteratees for methods like
	     * `_.every`, `_.filter`, `_.map`, `_.mapValues`, `_.reject`, and `_.some`.
	     *
	     * The guarded methods are:
	     * `ary`, `chunk`, `curry`, `curryRight`, `drop`, `dropRight`, `every`,
	     * `fill`, `invert`, `parseInt`, `random`, `range`, `rangeRight`, `repeat`,
	     * `sampleSize`, `slice`, `some`, `sortBy`, `split`, `take`, `takeRight`,
	     * `template`, `trim`, `trimEnd`, `trimStart`, and `words`
	     *
	     * @static
	     * @memberOf _
	     * @since 0.1.0
	     * @category Collection
	     * @param {Array|Object} collection The collection to iterate over.
	     * @param {Array|Function|Object|string} [iteratee=_.identity]
	     *  The function invoked per iteration.
	     * @returns {Array} Returns the new mapped array.
	     * @example
	     *
	     * function square(n) {
	     *   return n * n;
	     * }
	     *
	     * _.map([4, 8], square);
	     * // => [16, 64]
	     *
	     * _.map({ 'a': 4, 'b': 8 }, square);
	     * // => [16, 64] (iteration order is not guaranteed)
	     *
	     * var users = [
	     *   { 'user': 'barney' },
	     *   { 'user': 'fred' }
	     * ];
	     *
	     * // The `_.property` iteratee shorthand.
	     * _.map(users, 'user');
	     * // => ['barney', 'fred']
	     */
	    function map(collection, iteratee) {
	      var func = isArray(collection) ? arrayMap : baseMap;
	      return func(collection, getIteratee(iteratee, 3));
	    }

	    /**
	     * This method is like `_.sortBy` except that it allows specifying the sort
	     * orders of the iteratees to sort by. If `orders` is unspecified, all values
	     * are sorted in ascending order. Otherwise, specify an order of "desc" for
	     * descending or "asc" for ascending sort order of corresponding values.
	     *
	     * @static
	     * @memberOf _
	     * @since 4.0.0
	     * @category Collection
	     * @param {Array|Object} collection The collection to iterate over.
	     * @param {Array[]|Function[]|Object[]|string[]} [iteratees=[_.identity]]
	     *  The iteratees to sort by.
	     * @param {string[]} [orders] The sort orders of `iteratees`.
	     * @param- {Object} [guard] Enables use as an iteratee for methods like `_.reduce`.
	     * @returns {Array} Returns the new sorted array.
	     * @example
	     *
	     * var users = [
	     *   { 'user': 'fred',   'age': 48 },
	     *   { 'user': 'barney', 'age': 34 },
	     *   { 'user': 'fred',   'age': 40 },
	     *   { 'user': 'barney', 'age': 36 }
	     * ];
	     *
	     * // Sort by `user` in ascending order and by `age` in descending order.
	     * _.orderBy(users, ['user', 'age'], ['asc', 'desc']);
	     * // => objects for [['barney', 36], ['barney', 34], ['fred', 48], ['fred', 40]]
	     */
	    function orderBy(collection, iteratees, orders, guard) {
	      if (collection == null) {
	        return [];
	      }
	      if (!isArray(iteratees)) {
	        iteratees = iteratees == null ? [] : [iteratees];
	      }
	      orders = guard ? undefined : orders;
	      if (!isArray(orders)) {
	        orders = orders == null ? [] : [orders];
	      }
	      return baseOrderBy(collection, iteratees, orders);
	    }

	    /**
	     * Creates an array of elements split into two groups, the first of which
	     * contains elements `predicate` returns truthy for, the second of which
	     * contains elements `predicate` returns falsey for. The predicate is
	     * invoked with one argument: (value).
	     *
	     * @static
	     * @memberOf _
	     * @since 3.0.0
	     * @category Collection
	     * @param {Array|Object} collection The collection to iterate over.
	     * @param {Array|Function|Object|string} [predicate=_.identity]
	     *  The function invoked per iteration.
	     * @returns {Array} Returns the array of grouped elements.
	     * @example
	     *
	     * var users = [
	     *   { 'user': 'barney',  'age': 36, 'active': false },
	     *   { 'user': 'fred',    'age': 40, 'active': true },
	     *   { 'user': 'pebbles', 'age': 1,  'active': false }
	     * ];
	     *
	     * _.partition(users, function(o) { return o.active; });
	     * // => objects for [['fred'], ['barney', 'pebbles']]
	     *
	     * // The `_.matches` iteratee shorthand.
	     * _.partition(users, { 'age': 1, 'active': false });
	     * // => objects for [['pebbles'], ['barney', 'fred']]
	     *
	     * // The `_.matchesProperty` iteratee shorthand.
	     * _.partition(users, ['active', false]);
	     * // => objects for [['barney', 'pebbles'], ['fred']]
	     *
	     * // The `_.property` iteratee shorthand.
	     * _.partition(users, 'active');
	     * // => objects for [['fred'], ['barney', 'pebbles']]
	     */
	    var partition = createAggregator(function(result, value, key) {
	      result[key ? 0 : 1].push(value);
	    }, function() { return [[], []]; });

	    /**
	     * Reduces `collection` to a value which is the accumulated result of running
	     * each element in `collection` thru `iteratee`, where each successive
	     * invocation is supplied the return value of the previous. If `accumulator`
	     * is not given, the first element of `collection` is used as the initial
	     * value. The iteratee is invoked with four arguments:
	     * (accumulator, value, index|key, collection).
	     *
	     * Many lodash methods are guarded to work as iteratees for methods like
	     * `_.reduce`, `_.reduceRight`, and `_.transform`.
	     *
	     * The guarded methods are:
	     * `assign`, `defaults`, `defaultsDeep`, `includes`, `merge`, `orderBy`,
	     * and `sortBy`
	     *
	     * @static
	     * @memberOf _
	     * @since 0.1.0
	     * @category Collection
	     * @param {Array|Object} collection The collection to iterate over.
	     * @param {Function} [iteratee=_.identity] The function invoked per iteration.
	     * @param {*} [accumulator] The initial value.
	     * @returns {*} Returns the accumulated value.
	     * @example
	     *
	     * _.reduce([1, 2], function(sum, n) {
	     *   return sum + n;
	     * }, 0);
	     * // => 3
	     *
	     * _.reduce({ 'a': 1, 'b': 2, 'c': 1 }, function(result, value, key) {
	     *   (result[value] || (result[value] = [])).push(key);
	     *   return result;
	     * }, {});
	     * // => { '1': ['a', 'c'], '2': ['b'] } (iteration order is not guaranteed)
	     */
	    function reduce(collection, iteratee, accumulator) {
	      var func = isArray(collection) ? arrayReduce : baseReduce,
	          initAccum = arguments.length < 3;

	      return func(collection, getIteratee(iteratee, 4), accumulator, initAccum, baseEach);
	    }

	    /**
	     * This method is like `_.reduce` except that it iterates over elements of
	     * `collection` from right to left.
	     *
	     * @static
	     * @memberOf _
	     * @since 0.1.0
	     * @category Collection
	     * @param {Array|Object} collection The collection to iterate over.
	     * @param {Function} [iteratee=_.identity] The function invoked per iteration.
	     * @param {*} [accumulator] The initial value.
	     * @returns {*} Returns the accumulated value.
	     * @example
	     *
	     * var array = [[0, 1], [2, 3], [4, 5]];
	     *
	     * _.reduceRight(array, function(flattened, other) {
	     *   return flattened.concat(other);
	     * }, []);
	     * // => [4, 5, 2, 3, 0, 1]
	     */
	    function reduceRight(collection, iteratee, accumulator) {
	      var func = isArray(collection) ? arrayReduceRight : baseReduce,
	          initAccum = arguments.length < 3;

	      return func(collection, getIteratee(iteratee, 4), accumulator, initAccum, baseEachRight);
	    }

	    /**
	     * The opposite of `_.filter`; this method returns the elements of `collection`
	     * that `predicate` does **not** return truthy for.
	     *
	     * @static
	     * @memberOf _
	     * @since 0.1.0
	     * @category Collection
	     * @param {Array|Object} collection The collection to iterate over.
	     * @param {Array|Function|Object|string} [predicate=_.identity]
	     *  The function invoked per iteration.
	     * @returns {Array} Returns the new filtered array.
	     * @example
	     *
	     * var users = [
	     *   { 'user': 'barney', 'age': 36, 'active': false },
	     *   { 'user': 'fred',   'age': 40, 'active': true }
	     * ];
	     *
	     * _.reject(users, function(o) { return !o.active; });
	     * // => objects for ['fred']
	     *
	     * // The `_.matches` iteratee shorthand.
	     * _.reject(users, { 'age': 40, 'active': true });
	     * // => objects for ['barney']
	     *
	     * // The `_.matchesProperty` iteratee shorthand.
	     * _.reject(users, ['active', false]);
	     * // => objects for ['fred']
	     *
	     * // The `_.property` iteratee shorthand.
	     * _.reject(users, 'active');
	     * // => objects for ['barney']
	     */
	    function reject(collection, predicate) {
	      var func = isArray(collection) ? arrayFilter : baseFilter;
	      predicate = getIteratee(predicate, 3);
	      return func(collection, function(value, index, collection) {
	        return !predicate(value, index, collection);
	      });
	    }

	    /**
	     * Gets a random element from `collection`.
	     *
	     * @static
	     * @memberOf _
	     * @since 2.0.0
	     * @category Collection
	     * @param {Array|Object} collection The collection to sample.
	     * @returns {*} Returns the random element.
	     * @example
	     *
	     * _.sample([1, 2, 3, 4]);
	     * // => 2
	     */
	    function sample(collection) {
	      var array = isArrayLike(collection) ? collection : values(collection),
	          length = array.length;

	      return length > 0 ? array[baseRandom(0, length - 1)] : undefined;
	    }

	    /**
	     * Gets `n` random elements at unique keys from `collection` up to the
	     * size of `collection`.
	     *
	     * @static
	     * @memberOf _
	     * @since 4.0.0
	     * @category Collection
	     * @param {Array|Object} collection The collection to sample.
	     * @param {number} [n=1] The number of elements to sample.
	     * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
	     * @returns {Array} Returns the random elements.
	     * @example
	     *
	     * _.sampleSize([1, 2, 3], 2);
	     * // => [3, 1]
	     *
	     * _.sampleSize([1, 2, 3], 4);
	     * // => [2, 3, 1]
	     */
	    function sampleSize(collection, n, guard) {
	      var index = -1,
	          result = toArray(collection),
	          length = result.length,
	          lastIndex = length - 1;

	      if ((guard ? isIterateeCall(collection, n, guard) : n === undefined)) {
	        n = 1;
	      } else {
	        n = baseClamp(toInteger(n), 0, length);
	      }
	      while (++index < n) {
	        var rand = baseRandom(index, lastIndex),
	            value = result[rand];

	        result[rand] = result[index];
	        result[index] = value;
	      }
	      result.length = n;
	      return result;
	    }

	    /**
	     * Creates an array of shuffled values, using a version of the
	     * [Fisher-Yates shuffle](https://en.wikipedia.org/wiki/Fisher-Yates_shuffle).
	     *
	     * @static
	     * @memberOf _
	     * @since 0.1.0
	     * @category Collection
	     * @param {Array|Object} collection The collection to shuffle.
	     * @returns {Array} Returns the new shuffled array.
	     * @example
	     *
	     * _.shuffle([1, 2, 3, 4]);
	     * // => [4, 1, 3, 2]
	     */
	    function shuffle(collection) {
	      return sampleSize(collection, MAX_ARRAY_LENGTH);
	    }

	    /**
	     * Gets the size of `collection` by returning its length for array-like
	     * values or the number of own enumerable string keyed properties for objects.
	     *
	     * @static
	     * @memberOf _
	     * @since 0.1.0
	     * @category Collection
	     * @param {Array|Object} collection The collection to inspect.
	     * @returns {number} Returns the collection size.
	     * @example
	     *
	     * _.size([1, 2, 3]);
	     * // => 3
	     *
	     * _.size({ 'a': 1, 'b': 2 });
	     * // => 2
	     *
	     * _.size('pebbles');
	     * // => 7
	     */
	    function size(collection) {
	      if (collection == null) {
	        return 0;
	      }
	      if (isArrayLike(collection)) {
	        var result = collection.length;
	        return (result && isString(collection)) ? stringSize(collection) : result;
	      }
	      if (isObjectLike(collection)) {
	        var tag = getTag(collection);
	        if (tag == mapTag || tag == setTag) {
	          return collection.size;
	        }
	      }
	      return keys(collection).length;
	    }

	    /**
	     * Checks if `predicate` returns truthy for **any** element of `collection`.
	     * Iteration is stopped once `predicate` returns truthy. The predicate is
	     * invoked with three arguments: (value, index|key, collection).
	     *
	     * @static
	     * @memberOf _
	     * @since 0.1.0
	     * @category Collection
	     * @param {Array|Object} collection The collection to iterate over.
	     * @param {Array|Function|Object|string} [predicate=_.identity]
	     *  The function invoked per iteration.
	     * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
	     * @returns {boolean} Returns `true` if any element passes the predicate check,
	     *  else `false`.
	     * @example
	     *
	     * _.some([null, 0, 'yes', false], Boolean);
	     * // => true
	     *
	     * var users = [
	     *   { 'user': 'barney', 'active': true },
	     *   { 'user': 'fred',   'active': false }
	     * ];
	     *
	     * // The `_.matches` iteratee shorthand.
	     * _.some(users, { 'user': 'barney', 'active': false });
	     * // => false
	     *
	     * // The `_.matchesProperty` iteratee shorthand.
	     * _.some(users, ['active', false]);
	     * // => true
	     *
	     * // The `_.property` iteratee shorthand.
	     * _.some(users, 'active');
	     * // => true
	     */
	    function some(collection, predicate, guard) {
	      var func = isArray(collection) ? arraySome : baseSome;
	      if (guard && isIterateeCall(collection, predicate, guard)) {
	        predicate = undefined;
	      }
	      return func(collection, getIteratee(predicate, 3));
	    }

	    /**
	     * Creates an array of elements, sorted in ascending order by the results of
	     * running each element in a collection thru each iteratee. This method
	     * performs a stable sort, that is, it preserves the original sort order of
	     * equal elements. The iteratees are invoked with one argument: (value).
	     *
	     * @static
	     * @memberOf _
	     * @since 0.1.0
	     * @category Collection
	     * @param {Array|Object} collection The collection to iterate over.
	     * @param {...(Array|Array[]|Function|Function[]|Object|Object[]|string|string[])}
	     *  [iteratees=[_.identity]] The iteratees to sort by.
	     * @returns {Array} Returns the new sorted array.
	     * @example
	     *
	     * var users = [
	     *   { 'user': 'fred',   'age': 48 },
	     *   { 'user': 'barney', 'age': 36 },
	     *   { 'user': 'fred',   'age': 40 },
	     *   { 'user': 'barney', 'age': 34 }
	     * ];
	     *
	     * _.sortBy(users, function(o) { return o.user; });
	     * // => objects for [['barney', 36], ['barney', 34], ['fred', 48], ['fred', 40]]
	     *
	     * _.sortBy(users, ['user', 'age']);
	     * // => objects for [['barney', 34], ['barney', 36], ['fred', 40], ['fred', 48]]
	     *
	     * _.sortBy(users, 'user', function(o) {
	     *   return Math.floor(o.age / 10);
	     * });
	     * // => objects for [['barney', 36], ['barney', 34], ['fred', 48], ['fred', 40]]
	     */
	    var sortBy = rest(function(collection, iteratees) {
	      if (collection == null) {
	        return [];
	      }
	      var length = iteratees.length;
	      if (length > 1 && isIterateeCall(collection, iteratees[0], iteratees[1])) {
	        iteratees = [];
	      } else if (length > 2 && isIterateeCall(iteratees[0], iteratees[1], iteratees[2])) {
	        iteratees = [iteratees[0]];
	      }
	      iteratees = (iteratees.length == 1 && isArray(iteratees[0]))
	        ? iteratees[0]
	        : baseFlatten(iteratees, 1, isFlattenableIteratee);

	      return baseOrderBy(collection, iteratees, []);
	    });

	    /*------------------------------------------------------------------------*/

	    /**
	     * Gets the timestamp of the number of milliseconds that have elapsed since
	     * the Unix epoch (1 January 1970 00:00:00 UTC).
	     *
	     * @static
	     * @memberOf _
	     * @since 2.4.0
	     * @type {Function}
	     * @category Date
	     * @returns {number} Returns the timestamp.
	     * @example
	     *
	     * _.defer(function(stamp) {
	     *   console.log(_.now() - stamp);
	     * }, _.now());
	     * // => Logs the number of milliseconds it took for the deferred function to be invoked.
	     */
	    var now = Date.now;

	    /*------------------------------------------------------------------------*/

	    /**
	     * The opposite of `_.before`; this method creates a function that invokes
	     * `func` once it's called `n` or more times.
	     *
	     * @static
	     * @memberOf _
	     * @since 0.1.0
	     * @category Function
	     * @param {number} n The number of calls before `func` is invoked.
	     * @param {Function} func The function to restrict.
	     * @returns {Function} Returns the new restricted function.
	     * @example
	     *
	     * var saves = ['profile', 'settings'];
	     *
	     * var done = _.after(saves.length, function() {
	     *   console.log('done saving!');
	     * });
	     *
	     * _.forEach(saves, function(type) {
	     *   asyncSave({ 'type': type, 'complete': done });
	     * });
	     * // => Logs 'done saving!' after the two async saves have completed.
	     */
	    function after(n, func) {
	      if (typeof func != 'function') {
	        throw new TypeError(FUNC_ERROR_TEXT);
	      }
	      n = toInteger(n);
	      return function() {
	        if (--n < 1) {
	          return func.apply(this, arguments);
	        }
	      };
	    }

	    /**
	     * Creates a function that invokes `func`, with up to `n` arguments,
	     * ignoring any additional arguments.
	     *
	     * @static
	     * @memberOf _
	     * @since 3.0.0
	     * @category Function
	     * @param {Function} func The function to cap arguments for.
	     * @param {number} [n=func.length] The arity cap.
	     * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
	     * @returns {Function} Returns the new function.
	     * @example
	     *
	     * _.map(['6', '8', '10'], _.ary(parseInt, 1));
	     * // => [6, 8, 10]
	     */
	    function ary(func, n, guard) {
	      n = guard ? undefined : n;
	      n = (func && n == null) ? func.length : n;
	      return createWrapper(func, ARY_FLAG, undefined, undefined, undefined, undefined, n);
	    }

	    /**
	     * Creates a function that invokes `func`, with the `this` binding and arguments
	     * of the created function, while it's called less than `n` times. Subsequent
	     * calls to the created function return the result of the last `func` invocation.
	     *
	     * @static
	     * @memberOf _
	     * @since 3.0.0
	     * @category Function
	     * @param {number} n The number of calls at which `func` is no longer invoked.
	     * @param {Function} func The function to restrict.
	     * @returns {Function} Returns the new restricted function.
	     * @example
	     *
	     * jQuery(element).on('click', _.before(5, addContactToList));
	     * // => allows adding up to 4 contacts to the list
	     */
	    function before(n, func) {
	      var result;
	      if (typeof func != 'function') {
	        throw new TypeError(FUNC_ERROR_TEXT);
	      }
	      n = toInteger(n);
	      return function() {
	        if (--n > 0) {
	          result = func.apply(this, arguments);
	        }
	        if (n <= 1) {
	          func = undefined;
	        }
	        return result;
	      };
	    }

	    /**
	     * Creates a function that invokes `func` with the `this` binding of `thisArg`
	     * and `partials` prepended to the arguments it receives.
	     *
	     * The `_.bind.placeholder` value, which defaults to `_` in monolithic builds,
	     * may be used as a placeholder for partially applied arguments.
	     *
	     * **Note:** Unlike native `Function#bind` this method doesn't set the "length"
	     * property of bound functions.
	     *
	     * @static
	     * @memberOf _
	     * @since 0.1.0
	     * @category Function
	     * @param {Function} func The function to bind.
	     * @param {*} thisArg The `this` binding of `func`.
	     * @param {...*} [partials] The arguments to be partially applied.
	     * @returns {Function} Returns the new bound function.
	     * @example
	     *
	     * var greet = function(greeting, punctuation) {
	     *   return greeting + ' ' + this.user + punctuation;
	     * };
	     *
	     * var object = { 'user': 'fred' };
	     *
	     * var bound = _.bind(greet, object, 'hi');
	     * bound('!');
	     * // => 'hi fred!'
	     *
	     * // Bound with placeholders.
	     * var bound = _.bind(greet, object, _, '!');
	     * bound('hi');
	     * // => 'hi fred!'
	     */
	    var bind = rest(function(func, thisArg, partials) {
	      var bitmask = BIND_FLAG;
	      if (partials.length) {
	        var holders = replaceHolders(partials, getPlaceholder(bind));
	        bitmask |= PARTIAL_FLAG;
	      }
	      return createWrapper(func, bitmask, thisArg, partials, holders);
	    });

	    /**
	     * Creates a function that invokes the method at `object[key]` with `partials`
	     * prepended to the arguments it receives.
	     *
	     * This method differs from `_.bind` by allowing bound functions to reference
	     * methods that may be redefined or don't yet exist. See
	     * [Peter Michaux's article](http://peter.michaux.ca/articles/lazy-function-definition-pattern)
	     * for more details.
	     *
	     * The `_.bindKey.placeholder` value, which defaults to `_` in monolithic
	     * builds, may be used as a placeholder for partially applied arguments.
	     *
	     * @static
	     * @memberOf _
	     * @since 0.10.0
	     * @category Function
	     * @param {Object} object The object to invoke the method on.
	     * @param {string} key The key of the method.
	     * @param {...*} [partials] The arguments to be partially applied.
	     * @returns {Function} Returns the new bound function.
	     * @example
	     *
	     * var object = {
	     *   'user': 'fred',
	     *   'greet': function(greeting, punctuation) {
	     *     return greeting + ' ' + this.user + punctuation;
	     *   }
	     * };
	     *
	     * var bound = _.bindKey(object, 'greet', 'hi');
	     * bound('!');
	     * // => 'hi fred!'
	     *
	     * object.greet = function(greeting, punctuation) {
	     *   return greeting + 'ya ' + this.user + punctuation;
	     * };
	     *
	     * bound('!');
	     * // => 'hiya fred!'
	     *
	     * // Bound with placeholders.
	     * var bound = _.bindKey(object, 'greet', _, '!');
	     * bound('hi');
	     * // => 'hiya fred!'
	     */
	    var bindKey = rest(function(object, key, partials) {
	      var bitmask = BIND_FLAG | BIND_KEY_FLAG;
	      if (partials.length) {
	        var holders = replaceHolders(partials, getPlaceholder(bindKey));
	        bitmask |= PARTIAL_FLAG;
	      }
	      return createWrapper(key, bitmask, object, partials, holders);
	    });

	    /**
	     * Creates a function that accepts arguments of `func` and either invokes
	     * `func` returning its result, if at least `arity` number of arguments have
	     * been provided, or returns a function that accepts the remaining `func`
	     * arguments, and so on. The arity of `func` may be specified if `func.length`
	     * is not sufficient.
	     *
	     * The `_.curry.placeholder` value, which defaults to `_` in monolithic builds,
	     * may be used as a placeholder for provided arguments.
	     *
	     * **Note:** This method doesn't set the "length" property of curried functions.
	     *
	     * @static
	     * @memberOf _
	     * @since 2.0.0
	     * @category Function
	     * @param {Function} func The function to curry.
	     * @param {number} [arity=func.length] The arity of `func`.
	     * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
	     * @returns {Function} Returns the new curried function.
	     * @example
	     *
	     * var abc = function(a, b, c) {
	     *   return [a, b, c];
	     * };
	     *
	     * var curried = _.curry(abc);
	     *
	     * curried(1)(2)(3);
	     * // => [1, 2, 3]
	     *
	     * curried(1, 2)(3);
	     * // => [1, 2, 3]
	     *
	     * curried(1, 2, 3);
	     * // => [1, 2, 3]
	     *
	     * // Curried with placeholders.
	     * curried(1)(_, 3)(2);
	     * // => [1, 2, 3]
	     */
	    function curry(func, arity, guard) {
	      arity = guard ? undefined : arity;
	      var result = createWrapper(func, CURRY_FLAG, undefined, undefined, undefined, undefined, undefined, arity);
	      result.placeholder = curry.placeholder;
	      return result;
	    }

	    /**
	     * This method is like `_.curry` except that arguments are applied to `func`
	     * in the manner of `_.partialRight` instead of `_.partial`.
	     *
	     * The `_.curryRight.placeholder` value, which defaults to `_` in monolithic
	     * builds, may be used as a placeholder for provided arguments.
	     *
	     * **Note:** This method doesn't set the "length" property of curried functions.
	     *
	     * @static
	     * @memberOf _
	     * @since 3.0.0
	     * @category Function
	     * @param {Function} func The function to curry.
	     * @param {number} [arity=func.length] The arity of `func`.
	     * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
	     * @returns {Function} Returns the new curried function.
	     * @example
	     *
	     * var abc = function(a, b, c) {
	     *   return [a, b, c];
	     * };
	     *
	     * var curried = _.curryRight(abc);
	     *
	     * curried(3)(2)(1);
	     * // => [1, 2, 3]
	     *
	     * curried(2, 3)(1);
	     * // => [1, 2, 3]
	     *
	     * curried(1, 2, 3);
	     * // => [1, 2, 3]
	     *
	     * // Curried with placeholders.
	     * curried(3)(1, _)(2);
	     * // => [1, 2, 3]
	     */
	    function curryRight(func, arity, guard) {
	      arity = guard ? undefined : arity;
	      var result = createWrapper(func, CURRY_RIGHT_FLAG, undefined, undefined, undefined, undefined, undefined, arity);
	      result.placeholder = curryRight.placeholder;
	      return result;
	    }

	    /**
	     * Creates a debounced function that delays invoking `func` until after `wait`
	     * milliseconds have elapsed since the last time the debounced function was
	     * invoked. The debounced function comes with a `cancel` method to cancel
	     * delayed `func` invocations and a `flush` method to immediately invoke them.
	     * Provide an options object to indicate whether `func` should be invoked on
	     * the leading and/or trailing edge of the `wait` timeout. The `func` is invoked
	     * with the last arguments provided to the debounced function. Subsequent calls
	     * to the debounced function return the result of the last `func` invocation.
	     *
	     * **Note:** If `leading` and `trailing` options are `true`, `func` is invoked
	     * on the trailing edge of the timeout only if the debounced function is
	     * invoked more than once during the `wait` timeout.
	     *
	     * See [David Corbacho's article](https://css-tricks.com/debouncing-throttling-explained-examples/)
	     * for details over the differences between `_.debounce` and `_.throttle`.
	     *
	     * @static
	     * @memberOf _
	     * @since 0.1.0
	     * @category Function
	     * @param {Function} func The function to debounce.
	     * @param {number} [wait=0] The number of milliseconds to delay.
	     * @param {Object} [options={}] The options object.
	     * @param {boolean} [options.leading=false]
	     *  Specify invoking on the leading edge of the timeout.
	     * @param {number} [options.maxWait]
	     *  The maximum time `func` is allowed to be delayed before it's invoked.
	     * @param {boolean} [options.trailing=true]
	     *  Specify invoking on the trailing edge of the timeout.
	     * @returns {Function} Returns the new debounced function.
	     * @example
	     *
	     * // Avoid costly calculations while the window size is in flux.
	     * jQuery(window).on('resize', _.debounce(calculateLayout, 150));
	     *
	     * // Invoke `sendMail` when clicked, debouncing subsequent calls.
	     * jQuery(element).on('click', _.debounce(sendMail, 300, {
	     *   'leading': true,
	     *   'trailing': false
	     * }));
	     *
	     * // Ensure `batchLog` is invoked once after 1 second of debounced calls.
	     * var debounced = _.debounce(batchLog, 250, { 'maxWait': 1000 });
	     * var source = new EventSource('/stream');
	     * jQuery(source).on('message', debounced);
	     *
	     * // Cancel the trailing debounced invocation.
	     * jQuery(window).on('popstate', debounced.cancel);
	     */
	    function debounce(func, wait, options) {
	      var lastArgs,
	          lastThis,
	          maxWait,
	          result,
	          timerId,
	          lastCallTime = 0,
	          lastInvokeTime = 0,
	          leading = false,
	          maxing = false,
	          trailing = true;

	      if (typeof func != 'function') {
	        throw new TypeError(FUNC_ERROR_TEXT);
	      }
	      wait = toNumber(wait) || 0;
	      if (isObject(options)) {
	        leading = !!options.leading;
	        maxing = 'maxWait' in options;
	        maxWait = maxing ? nativeMax(toNumber(options.maxWait) || 0, wait) : maxWait;
	        trailing = 'trailing' in options ? !!options.trailing : trailing;
	      }

	      function invokeFunc(time) {
	        var args = lastArgs,
	            thisArg = lastThis;

	        lastArgs = lastThis = undefined;
	        lastInvokeTime = time;
	        result = func.apply(thisArg, args);
	        return result;
	      }

	      function leadingEdge(time) {
	        // Reset any `maxWait` timer.
	        lastInvokeTime = time;
	        // Start the timer for the trailing edge.
	        timerId = setTimeout(timerExpired, wait);
	        // Invoke the leading edge.
	        return leading ? invokeFunc(time) : result;
	      }

	      function remainingWait(time) {
	        var timeSinceLastCall = time - lastCallTime,
	            timeSinceLastInvoke = time - lastInvokeTime,
	            result = wait - timeSinceLastCall;

	        return maxing ? nativeMin(result, maxWait - timeSinceLastInvoke) : result;
	      }

	      function shouldInvoke(time) {
	        var timeSinceLastCall = time - lastCallTime,
	            timeSinceLastInvoke = time - lastInvokeTime;

	        // Either this is the first call, activity has stopped and we're at the
	        // trailing edge, the system time has gone backwards and we're treating
	        // it as the trailing edge, or we've hit the `maxWait` limit.
	        return (!lastCallTime || (timeSinceLastCall >= wait) ||
	          (timeSinceLastCall < 0) || (maxing && timeSinceLastInvoke >= maxWait));
	      }

	      function timerExpired() {
	        var time = now();
	        if (shouldInvoke(time)) {
	          return trailingEdge(time);
	        }
	        // Restart the timer.
	        timerId = setTimeout(timerExpired, remainingWait(time));
	      }

	      function trailingEdge(time) {
	        clearTimeout(timerId);
	        timerId = undefined;

	        // Only invoke if we have `lastArgs` which means `func` has been
	        // debounced at least once.
	        if (trailing && lastArgs) {
	          return invokeFunc(time);
	        }
	        lastArgs = lastThis = undefined;
	        return result;
	      }

	      function cancel() {
	        if (timerId !== undefined) {
	          clearTimeout(timerId);
	        }
	        lastCallTime = lastInvokeTime = 0;
	        lastArgs = lastThis = timerId = undefined;
	      }

	      function flush() {
	        return timerId === undefined ? result : trailingEdge(now());
	      }

	      function debounced() {
	        var time = now(),
	            isInvoking = shouldInvoke(time);

	        lastArgs = arguments;
	        lastThis = this;
	        lastCallTime = time;

	        if (isInvoking) {
	          if (timerId === undefined) {
	            return leadingEdge(lastCallTime);
	          }
	          if (maxing) {
	            // Handle invocations in a tight loop.
	            clearTimeout(timerId);
	            timerId = setTimeout(timerExpired, wait);
	            return invokeFunc(lastCallTime);
	          }
	        }
	        if (timerId === undefined) {
	          timerId = setTimeout(timerExpired, wait);
	        }
	        return result;
	      }
	      debounced.cancel = cancel;
	      debounced.flush = flush;
	      return debounced;
	    }

	    /**
	     * Defers invoking the `func` until the current call stack has cleared. Any
	     * additional arguments are provided to `func` when it's invoked.
	     *
	     * @static
	     * @memberOf _
	     * @since 0.1.0
	     * @category Function
	     * @param {Function} func The function to defer.
	     * @param {...*} [args] The arguments to invoke `func` with.
	     * @returns {number} Returns the timer id.
	     * @example
	     *
	     * _.defer(function(text) {
	     *   console.log(text);
	     * }, 'deferred');
	     * // => Logs 'deferred' after one or more milliseconds.
	     */
	    var defer = rest(function(func, args) {
	      return baseDelay(func, 1, args);
	    });

	    /**
	     * Invokes `func` after `wait` milliseconds. Any additional arguments are
	     * provided to `func` when it's invoked.
	     *
	     * @static
	     * @memberOf _
	     * @since 0.1.0
	     * @category Function
	     * @param {Function} func The function to delay.
	     * @param {number} wait The number of milliseconds to delay invocation.
	     * @param {...*} [args] The arguments to invoke `func` with.
	     * @returns {number} Returns the timer id.
	     * @example
	     *
	     * _.delay(function(text) {
	     *   console.log(text);
	     * }, 1000, 'later');
	     * // => Logs 'later' after one second.
	     */
	    var delay = rest(function(func, wait, args) {
	      return baseDelay(func, toNumber(wait) || 0, args);
	    });

	    /**
	     * Creates a function that invokes `func` with arguments reversed.
	     *
	     * @static
	     * @memberOf _
	     * @since 4.0.0
	     * @category Function
	     * @param {Function} func The function to flip arguments for.
	     * @returns {Function} Returns the new function.
	     * @example
	     *
	     * var flipped = _.flip(function() {
	     *   return _.toArray(arguments);
	     * });
	     *
	     * flipped('a', 'b', 'c', 'd');
	     * // => ['d', 'c', 'b', 'a']
	     */
	    function flip(func) {
	      return createWrapper(func, FLIP_FLAG);
	    }

	    /**
	     * Creates a function that memoizes the result of `func`. If `resolver` is
	     * provided, it determines the cache key for storing the result based on the
	     * arguments provided to the memoized function. By default, the first argument
	     * provided to the memoized function is used as the map cache key. The `func`
	     * is invoked with the `this` binding of the memoized function.
	     *
	     * **Note:** The cache is exposed as the `cache` property on the memoized
	     * function. Its creation may be customized by replacing the `_.memoize.Cache`
	     * constructor with one whose instances implement the
	     * [`Map`](http://ecma-international.org/ecma-262/6.0/#sec-properties-of-the-map-prototype-object)
	     * method interface of `delete`, `get`, `has`, and `set`.
	     *
	     * @static
	     * @memberOf _
	     * @since 0.1.0
	     * @category Function
	     * @param {Function} func The function to have its output memoized.
	     * @param {Function} [resolver] The function to resolve the cache key.
	     * @returns {Function} Returns the new memoizing function.
	     * @example
	     *
	     * var object = { 'a': 1, 'b': 2 };
	     * var other = { 'c': 3, 'd': 4 };
	     *
	     * var values = _.memoize(_.values);
	     * values(object);
	     * // => [1, 2]
	     *
	     * values(other);
	     * // => [3, 4]
	     *
	     * object.a = 2;
	     * values(object);
	     * // => [1, 2]
	     *
	     * // Modify the result cache.
	     * values.cache.set(object, ['a', 'b']);
	     * values(object);
	     * // => ['a', 'b']
	     *
	     * // Replace `_.memoize.Cache`.
	     * _.memoize.Cache = WeakMap;
	     */
	    function memoize(func, resolver) {
	      if (typeof func != 'function' || (resolver && typeof resolver != 'function')) {
	        throw new TypeError(FUNC_ERROR_TEXT);
	      }
	      var memoized = function() {
	        var args = arguments,
	            key = resolver ? resolver.apply(this, args) : args[0],
	            cache = memoized.cache;

	        if (cache.has(key)) {
	          return cache.get(key);
	        }
	        var result = func.apply(this, args);
	        memoized.cache = cache.set(key, result);
	        return result;
	      };
	      memoized.cache = new (memoize.Cache || MapCache);
	      return memoized;
	    }

	    // Assign cache to `_.memoize`.
	    memoize.Cache = MapCache;

	    /**
	     * Creates a function that negates the result of the predicate `func`. The
	     * `func` predicate is invoked with the `this` binding and arguments of the
	     * created function.
	     *
	     * @static
	     * @memberOf _
	     * @since 3.0.0
	     * @category Function
	     * @param {Function} predicate The predicate to negate.
	     * @returns {Function} Returns the new function.
	     * @example
	     *
	     * function isEven(n) {
	     *   return n % 2 == 0;
	     * }
	     *
	     * _.filter([1, 2, 3, 4, 5, 6], _.negate(isEven));
	     * // => [1, 3, 5]
	     */
	    function negate(predicate) {
	      if (typeof predicate != 'function') {
	        throw new TypeError(FUNC_ERROR_TEXT);
	      }
	      return function() {
	        return !predicate.apply(this, arguments);
	      };
	    }

	    /**
	     * Creates a function that is restricted to invoking `func` once. Repeat calls
	     * to the function return the value of the first invocation. The `func` is
	     * invoked with the `this` binding and arguments of the created function.
	     *
	     * @static
	     * @memberOf _
	     * @since 0.1.0
	     * @category Function
	     * @param {Function} func The function to restrict.
	     * @returns {Function} Returns the new restricted function.
	     * @example
	     *
	     * var initialize = _.once(createApplication);
	     * initialize();
	     * initialize();
	     * // `initialize` invokes `createApplication` once
	     */
	    function once(func) {
	      return before(2, func);
	    }

	    /**
	     * Creates a function that invokes `func` with arguments transformed by
	     * corresponding `transforms`.
	     *
	     * @static
	     * @since 4.0.0
	     * @memberOf _
	     * @category Function
	     * @param {Function} func The function to wrap.
	     * @param {...(Array|Array[]|Function|Function[]|Object|Object[]|string|string[])}
	     *  [transforms[_.identity]] The functions to transform.
	     * @returns {Function} Returns the new function.
	     * @example
	     *
	     * function doubled(n) {
	     *   return n * 2;
	     * }
	     *
	     * function square(n) {
	     *   return n * n;
	     * }
	     *
	     * var func = _.overArgs(function(x, y) {
	     *   return [x, y];
	     * }, square, doubled);
	     *
	     * func(9, 3);
	     * // => [81, 6]
	     *
	     * func(10, 5);
	     * // => [100, 10]
	     */
	    var overArgs = rest(function(func, transforms) {
	      transforms = (transforms.length == 1 && isArray(transforms[0]))
	        ? arrayMap(transforms[0], baseUnary(getIteratee()))
	        : arrayMap(baseFlatten(transforms, 1, isFlattenableIteratee), baseUnary(getIteratee()));

	      var funcsLength = transforms.length;
	      return rest(function(args) {
	        var index = -1,
	            length = nativeMin(args.length, funcsLength);

	        while (++index < length) {
	          args[index] = transforms[index].call(this, args[index]);
	        }
	        return apply(func, this, args);
	      });
	    });

	    /**
	     * Creates a function that invokes `func` with `partials` prepended to the
	     * arguments it receives. This method is like `_.bind` except it does **not**
	     * alter the `this` binding.
	     *
	     * The `_.partial.placeholder` value, which defaults to `_` in monolithic
	     * builds, may be used as a placeholder for partially applied arguments.
	     *
	     * **Note:** This method doesn't set the "length" property of partially
	     * applied functions.
	     *
	     * @static
	     * @memberOf _
	     * @since 0.2.0
	     * @category Function
	     * @param {Function} func The function to partially apply arguments to.
	     * @param {...*} [partials] The arguments to be partially applied.
	     * @returns {Function} Returns the new partially applied function.
	     * @example
	     *
	     * var greet = function(greeting, name) {
	     *   return greeting + ' ' + name;
	     * };
	     *
	     * var sayHelloTo = _.partial(greet, 'hello');
	     * sayHelloTo('fred');
	     * // => 'hello fred'
	     *
	     * // Partially applied with placeholders.
	     * var greetFred = _.partial(greet, _, 'fred');
	     * greetFred('hi');
	     * // => 'hi fred'
	     */
	    var partial = rest(function(func, partials) {
	      var holders = replaceHolders(partials, getPlaceholder(partial));
	      return createWrapper(func, PARTIAL_FLAG, undefined, partials, holders);
	    });

	    /**
	     * This method is like `_.partial` except that partially applied arguments
	     * are appended to the arguments it receives.
	     *
	     * The `_.partialRight.placeholder` value, which defaults to `_` in monolithic
	     * builds, may be used as a placeholder for partially applied arguments.
	     *
	     * **Note:** This method doesn't set the "length" property of partially
	     * applied functions.
	     *
	     * @static
	     * @memberOf _
	     * @since 1.0.0
	     * @category Function
	     * @param {Function} func The function to partially apply arguments to.
	     * @param {...*} [partials] The arguments to be partially applied.
	     * @returns {Function} Returns the new partially applied function.
	     * @example
	     *
	     * var greet = function(greeting, name) {
	     *   return greeting + ' ' + name;
	     * };
	     *
	     * var greetFred = _.partialRight(greet, 'fred');
	     * greetFred('hi');
	     * // => 'hi fred'
	     *
	     * // Partially applied with placeholders.
	     * var sayHelloTo = _.partialRight(greet, 'hello', _);
	     * sayHelloTo('fred');
	     * // => 'hello fred'
	     */
	    var partialRight = rest(function(func, partials) {
	      var holders = replaceHolders(partials, getPlaceholder(partialRight));
	      return createWrapper(func, PARTIAL_RIGHT_FLAG, undefined, partials, holders);
	    });

	    /**
	     * Creates a function that invokes `func` with arguments arranged according
	     * to the specified `indexes` where the argument value at the first index is
	     * provided as the first argument, the argument value at the second index is
	     * provided as the second argument, and so on.
	     *
	     * @static
	     * @memberOf _
	     * @since 3.0.0
	     * @category Function
	     * @param {Function} func The function to rearrange arguments for.
	     * @param {...(number|number[])} indexes The arranged argument indexes.
	     * @returns {Function} Returns the new function.
	     * @example
	     *
	     * var rearged = _.rearg(function(a, b, c) {
	     *   return [a, b, c];
	     * }, 2, 0, 1);
	     *
	     * rearged('b', 'c', 'a')
	     * // => ['a', 'b', 'c']
	     */
	    var rearg = rest(function(func, indexes) {
	      return createWrapper(func, REARG_FLAG, undefined, undefined, undefined, baseFlatten(indexes, 1));
	    });

	    /**
	     * Creates a function that invokes `func` with the `this` binding of the
	     * created function and arguments from `start` and beyond provided as
	     * an array.
	     *
	     * **Note:** This method is based on the
	     * [rest parameter](https://mdn.io/rest_parameters).
	     *
	     * @static
	     * @memberOf _
	     * @since 4.0.0
	     * @category Function
	     * @param {Function} func The function to apply a rest parameter to.
	     * @param {number} [start=func.length-1] The start position of the rest parameter.
	     * @returns {Function} Returns the new function.
	     * @example
	     *
	     * var say = _.rest(function(what, names) {
	     *   return what + ' ' + _.initial(names).join(', ') +
	     *     (_.size(names) > 1 ? ', & ' : '') + _.last(names);
	     * });
	     *
	     * say('hello', 'fred', 'barney', 'pebbles');
	     * // => 'hello fred, barney, & pebbles'
	     */
	    function rest(func, start) {
	      if (typeof func != 'function') {
	        throw new TypeError(FUNC_ERROR_TEXT);
	      }
	      start = nativeMax(start === undefined ? (func.length - 1) : toInteger(start), 0);
	      return function() {
	        var args = arguments,
	            index = -1,
	            length = nativeMax(args.length - start, 0),
	            array = Array(length);

	        while (++index < length) {
	          array[index] = args[start + index];
	        }
	        switch (start) {
	          case 0: return func.call(this, array);
	          case 1: return func.call(this, args[0], array);
	          case 2: return func.call(this, args[0], args[1], array);
	        }
	        var otherArgs = Array(start + 1);
	        index = -1;
	        while (++index < start) {
	          otherArgs[index] = args[index];
	        }
	        otherArgs[start] = array;
	        return apply(func, this, otherArgs);
	      };
	    }

	    /**
	     * Creates a function that invokes `func` with the `this` binding of the
	     * create function and an array of arguments much like
	     * [`Function#apply`](http://www.ecma-international.org/ecma-262/6.0/#sec-function.prototype.apply).
	     *
	     * **Note:** This method is based on the
	     * [spread operator](https://mdn.io/spread_operator).
	     *
	     * @static
	     * @memberOf _
	     * @since 3.2.0
	     * @category Function
	     * @param {Function} func The function to spread arguments over.
	     * @param {number} [start=0] The start position of the spread.
	     * @returns {Function} Returns the new function.
	     * @example
	     *
	     * var say = _.spread(function(who, what) {
	     *   return who + ' says ' + what;
	     * });
	     *
	     * say(['fred', 'hello']);
	     * // => 'fred says hello'
	     *
	     * var numbers = Promise.all([
	     *   Promise.resolve(40),
	     *   Promise.resolve(36)
	     * ]);
	     *
	     * numbers.then(_.spread(function(x, y) {
	     *   return x + y;
	     * }));
	     * // => a Promise of 76
	     */
	    function spread(func, start) {
	      if (typeof func != 'function') {
	        throw new TypeError(FUNC_ERROR_TEXT);
	      }
	      start = start === undefined ? 0 : nativeMax(toInteger(start), 0);
	      return rest(function(args) {
	        var array = args[start],
	            otherArgs = castSlice(args, 0, start);

	        if (array) {
	          arrayPush(otherArgs, array);
	        }
	        return apply(func, this, otherArgs);
	      });
	    }

	    /**
	     * Creates a throttled function that only invokes `func` at most once per
	     * every `wait` milliseconds. The throttled function comes with a `cancel`
	     * method to cancel delayed `func` invocations and a `flush` method to
	     * immediately invoke them. Provide an options object to indicate whether
	     * `func` should be invoked on the leading and/or trailing edge of the `wait`
	     * timeout. The `func` is invoked with the last arguments provided to the
	     * throttled function. Subsequent calls to the throttled function return the
	     * result of the last `func` invocation.
	     *
	     * **Note:** If `leading` and `trailing` options are `true`, `func` is
	     * invoked on the trailing edge of the timeout only if the throttled function
	     * is invoked more than once during the `wait` timeout.
	     *
	     * See [David Corbacho's article](https://css-tricks.com/debouncing-throttling-explained-examples/)
	     * for details over the differences between `_.throttle` and `_.debounce`.
	     *
	     * @static
	     * @memberOf _
	     * @since 0.1.0
	     * @category Function
	     * @param {Function} func The function to throttle.
	     * @param {number} [wait=0] The number of milliseconds to throttle invocations to.
	     * @param {Object} [options={}] The options object.
	     * @param {boolean} [options.leading=true]
	     *  Specify invoking on the leading edge of the timeout.
	     * @param {boolean} [options.trailing=true]
	     *  Specify invoking on the trailing edge of the timeout.
	     * @returns {Function} Returns the new throttled function.
	     * @example
	     *
	     * // Avoid excessively updating the position while scrolling.
	     * jQuery(window).on('scroll', _.throttle(updatePosition, 100));
	     *
	     * // Invoke `renewToken` when the click event is fired, but not more than once every 5 minutes.
	     * var throttled = _.throttle(renewToken, 300000, { 'trailing': false });
	     * jQuery(element).on('click', throttled);
	     *
	     * // Cancel the trailing throttled invocation.
	     * jQuery(window).on('popstate', throttled.cancel);
	     */
	    function throttle(func, wait, options) {
	      var leading = true,
	          trailing = true;

	      if (typeof func != 'function') {
	        throw new TypeError(FUNC_ERROR_TEXT);
	      }
	      if (isObject(options)) {
	        leading = 'leading' in options ? !!options.leading : leading;
	        trailing = 'trailing' in options ? !!options.trailing : trailing;
	      }
	      return debounce(func, wait, {
	        'leading': leading,
	        'maxWait': wait,
	        'trailing': trailing
	      });
	    }

	    /**
	     * Creates a function that accepts up to one argument, ignoring any
	     * additional arguments.
	     *
	     * @static
	     * @memberOf _
	     * @since 4.0.0
	     * @category Function
	     * @param {Function} func The function to cap arguments for.
	     * @returns {Function} Returns the new function.
	     * @example
	     *
	     * _.map(['6', '8', '10'], _.unary(parseInt));
	     * // => [6, 8, 10]
	     */
	    function unary(func) {
	      return ary(func, 1);
	    }

	    /**
	     * Creates a function that provides `value` to the wrapper function as its
	     * first argument. Any additional arguments provided to the function are
	     * appended to those provided to the wrapper function. The wrapper is invoked
	     * with the `this` binding of the created function.
	     *
	     * @static
	     * @memberOf _
	     * @since 0.1.0
	     * @category Function
	     * @param {*} value The value to wrap.
	     * @param {Function} [wrapper=identity] The wrapper function.
	     * @returns {Function} Returns the new function.
	     * @example
	     *
	     * var p = _.wrap(_.escape, function(func, text) {
	     *   return '<p>' + func(text) + '</p>';
	     * });
	     *
	     * p('fred, barney, & pebbles');
	     * // => '<p>fred, barney, &amp; pebbles</p>'
	     */
	    function wrap(value, wrapper) {
	      wrapper = wrapper == null ? identity : wrapper;
	      return partial(wrapper, value);
	    }

	    /*------------------------------------------------------------------------*/

	    /**
	     * Casts `value` as an array if it's not one.
	     *
	     * @static
	     * @memberOf _
	     * @since 4.4.0
	     * @category Lang
	     * @param {*} value The value to inspect.
	     * @returns {Array} Returns the cast array.
	     * @example
	     *
	     * _.castArray(1);
	     * // => [1]
	     *
	     * _.castArray({ 'a': 1 });
	     * // => [{ 'a': 1 }]
	     *
	     * _.castArray('abc');
	     * // => ['abc']
	     *
	     * _.castArray(null);
	     * // => [null]
	     *
	     * _.castArray(undefined);
	     * // => [undefined]
	     *
	     * _.castArray();
	     * // => []
	     *
	     * var array = [1, 2, 3];
	     * console.log(_.castArray(array) === array);
	     * // => true
	     */
	    function castArray() {
	      if (!arguments.length) {
	        return [];
	      }
	      var value = arguments[0];
	      return isArray(value) ? value : [value];
	    }

	    /**
	     * Creates a shallow clone of `value`.
	     *
	     * **Note:** This method is loosely based on the
	     * [structured clone algorithm](https://mdn.io/Structured_clone_algorithm)
	     * and supports cloning arrays, array buffers, booleans, date objects, maps,
	     * numbers, `Object` objects, regexes, sets, strings, symbols, and typed
	     * arrays. The own enumerable properties of `arguments` objects are cloned
	     * as plain objects. An empty object is returned for uncloneable values such
	     * as error objects, functions, DOM nodes, and WeakMaps.
	     *
	     * @static
	     * @memberOf _
	     * @since 0.1.0
	     * @category Lang
	     * @param {*} value The value to clone.
	     * @returns {*} Returns the cloned value.
	     * @example
	     *
	     * var objects = [{ 'a': 1 }, { 'b': 2 }];
	     *
	     * var shallow = _.clone(objects);
	     * console.log(shallow[0] === objects[0]);
	     * // => true
	     */
	    function clone(value) {
	      return baseClone(value, false, true);
	    }

	    /**
	     * This method is like `_.clone` except that it accepts `customizer` which
	     * is invoked to produce the cloned value. If `customizer` returns `undefined`,
	     * cloning is handled by the method instead. The `customizer` is invoked with
	     * up to four arguments; (value [, index|key, object, stack]).
	     *
	     * @static
	     * @memberOf _
	     * @since 4.0.0
	     * @category Lang
	     * @param {*} value The value to clone.
	     * @param {Function} [customizer] The function to customize cloning.
	     * @returns {*} Returns the cloned value.
	     * @example
	     *
	     * function customizer(value) {
	     *   if (_.isElement(value)) {
	     *     return value.cloneNode(false);
	     *   }
	     * }
	     *
	     * var el = _.cloneWith(document.body, customizer);
	     *
	     * console.log(el === document.body);
	     * // => false
	     * console.log(el.nodeName);
	     * // => 'BODY'
	     * console.log(el.childNodes.length);
	     * // => 0
	     */
	    function cloneWith(value, customizer) {
	      return baseClone(value, false, true, customizer);
	    }

	    /**
	     * This method is like `_.clone` except that it recursively clones `value`.
	     *
	     * @static
	     * @memberOf _
	     * @since 1.0.0
	     * @category Lang
	     * @param {*} value The value to recursively clone.
	     * @returns {*} Returns the deep cloned value.
	     * @example
	     *
	     * var objects = [{ 'a': 1 }, { 'b': 2 }];
	     *
	     * var deep = _.cloneDeep(objects);
	     * console.log(deep[0] === objects[0]);
	     * // => false
	     */
	    function cloneDeep(value) {
	      return baseClone(value, true, true);
	    }

	    /**
	     * This method is like `_.cloneWith` except that it recursively clones `value`.
	     *
	     * @static
	     * @memberOf _
	     * @since 4.0.0
	     * @category Lang
	     * @param {*} value The value to recursively clone.
	     * @param {Function} [customizer] The function to customize cloning.
	     * @returns {*} Returns the deep cloned value.
	     * @example
	     *
	     * function customizer(value) {
	     *   if (_.isElement(value)) {
	     *     return value.cloneNode(true);
	     *   }
	     * }
	     *
	     * var el = _.cloneDeepWith(document.body, customizer);
	     *
	     * console.log(el === document.body);
	     * // => false
	     * console.log(el.nodeName);
	     * // => 'BODY'
	     * console.log(el.childNodes.length);
	     * // => 20
	     */
	    function cloneDeepWith(value, customizer) {
	      return baseClone(value, true, true, customizer);
	    }

	    /**
	     * Performs a
	     * [`SameValueZero`](http://ecma-international.org/ecma-262/6.0/#sec-samevaluezero)
	     * comparison between two values to determine if they are equivalent.
	     *
	     * @static
	     * @memberOf _
	     * @since 4.0.0
	     * @category Lang
	     * @param {*} value The value to compare.
	     * @param {*} other The other value to compare.
	     * @returns {boolean} Returns `true` if the values are equivalent, else `false`.
	     * @example
	     *
	     * var object = { 'user': 'fred' };
	     * var other = { 'user': 'fred' };
	     *
	     * _.eq(object, object);
	     * // => true
	     *
	     * _.eq(object, other);
	     * // => false
	     *
	     * _.eq('a', 'a');
	     * // => true
	     *
	     * _.eq('a', Object('a'));
	     * // => false
	     *
	     * _.eq(NaN, NaN);
	     * // => true
	     */
	    function eq(value, other) {
	      return value === other || (value !== value && other !== other);
	    }

	    /**
	     * Checks if `value` is greater than `other`.
	     *
	     * @static
	     * @memberOf _
	     * @since 3.9.0
	     * @category Lang
	     * @param {*} value The value to compare.
	     * @param {*} other The other value to compare.
	     * @returns {boolean} Returns `true` if `value` is greater than `other`,
	     *  else `false`.
	     * @example
	     *
	     * _.gt(3, 1);
	     * // => true
	     *
	     * _.gt(3, 3);
	     * // => false
	     *
	     * _.gt(1, 3);
	     * // => false
	     */
	    function gt(value, other) {
	      return value > other;
	    }

	    /**
	     * Checks if `value` is greater than or equal to `other`.
	     *
	     * @static
	     * @memberOf _
	     * @since 3.9.0
	     * @category Lang
	     * @param {*} value The value to compare.
	     * @param {*} other The other value to compare.
	     * @returns {boolean} Returns `true` if `value` is greater than or equal to
	     *  `other`, else `false`.
	     * @example
	     *
	     * _.gte(3, 1);
	     * // => true
	     *
	     * _.gte(3, 3);
	     * // => true
	     *
	     * _.gte(1, 3);
	     * // => false
	     */
	    function gte(value, other) {
	      return value >= other;
	    }

	    /**
	     * Checks if `value` is likely an `arguments` object.
	     *
	     * @static
	     * @memberOf _
	     * @since 0.1.0
	     * @category Lang
	     * @param {*} value The value to check.
	     * @returns {boolean} Returns `true` if `value` is correctly classified,
	     *  else `false`.
	     * @example
	     *
	     * _.isArguments(function() { return arguments; }());
	     * // => true
	     *
	     * _.isArguments([1, 2, 3]);
	     * // => false
	     */
	    function isArguments(value) {
	      // Safari 8.1 incorrectly makes `arguments.callee` enumerable in strict mode.
	      return isArrayLikeObject(value) && hasOwnProperty.call(value, 'callee') &&
	        (!propertyIsEnumerable.call(value, 'callee') || objectToString.call(value) == argsTag);
	    }

	    /**
	     * Checks if `value` is classified as an `Array` object.
	     *
	     * @static
	     * @memberOf _
	     * @since 0.1.0
	     * @type {Function}
	     * @category Lang
	     * @param {*} value The value to check.
	     * @returns {boolean} Returns `true` if `value` is correctly classified,
	     *  else `false`.
	     * @example
	     *
	     * _.isArray([1, 2, 3]);
	     * // => true
	     *
	     * _.isArray(document.body.children);
	     * // => false
	     *
	     * _.isArray('abc');
	     * // => false
	     *
	     * _.isArray(_.noop);
	     * // => false
	     */
	    var isArray = Array.isArray;

	    /**
	     * Checks if `value` is classified as an `ArrayBuffer` object.
	     *
	     * @static
	     * @memberOf _
	     * @since 4.3.0
	     * @category Lang
	     * @param {*} value The value to check.
	     * @returns {boolean} Returns `true` if `value` is correctly classified,
	     *  else `false`.
	     * @example
	     *
	     * _.isArrayBuffer(new ArrayBuffer(2));
	     * // => true
	     *
	     * _.isArrayBuffer(new Array(2));
	     * // => false
	     */
	    function isArrayBuffer(value) {
	      return isObjectLike(value) && objectToString.call(value) == arrayBufferTag;
	    }

	    /**
	     * Checks if `value` is array-like. A value is considered array-like if it's
	     * not a function and has a `value.length` that's an integer greater than or
	     * equal to `0` and less than or equal to `Number.MAX_SAFE_INTEGER`.
	     *
	     * @static
	     * @memberOf _
	     * @since 4.0.0
	     * @category Lang
	     * @param {*} value The value to check.
	     * @returns {boolean} Returns `true` if `value` is array-like, else `false`.
	     * @example
	     *
	     * _.isArrayLike([1, 2, 3]);
	     * // => true
	     *
	     * _.isArrayLike(document.body.children);
	     * // => true
	     *
	     * _.isArrayLike('abc');
	     * // => true
	     *
	     * _.isArrayLike(_.noop);
	     * // => false
	     */
	    function isArrayLike(value) {
	      return value != null && isLength(getLength(value)) && !isFunction(value);
	    }

	    /**
	     * This method is like `_.isArrayLike` except that it also checks if `value`
	     * is an object.
	     *
	     * @static
	     * @memberOf _
	     * @since 4.0.0
	     * @category Lang
	     * @param {*} value The value to check.
	     * @returns {boolean} Returns `true` if `value` is an array-like object,
	     *  else `false`.
	     * @example
	     *
	     * _.isArrayLikeObject([1, 2, 3]);
	     * // => true
	     *
	     * _.isArrayLikeObject(document.body.children);
	     * // => true
	     *
	     * _.isArrayLikeObject('abc');
	     * // => false
	     *
	     * _.isArrayLikeObject(_.noop);
	     * // => false
	     */
	    function isArrayLikeObject(value) {
	      return isObjectLike(value) && isArrayLike(value);
	    }

	    /**
	     * Checks if `value` is classified as a boolean primitive or object.
	     *
	     * @static
	     * @memberOf _
	     * @since 0.1.0
	     * @category Lang
	     * @param {*} value The value to check.
	     * @returns {boolean} Returns `true` if `value` is correctly classified,
	     *  else `false`.
	     * @example
	     *
	     * _.isBoolean(false);
	     * // => true
	     *
	     * _.isBoolean(null);
	     * // => false
	     */
	    function isBoolean(value) {
	      return value === true || value === false ||
	        (isObjectLike(value) && objectToString.call(value) == boolTag);
	    }

	    /**
	     * Checks if `value` is a buffer.
	     *
	     * @static
	     * @memberOf _
	     * @since 4.3.0
	     * @category Lang
	     * @param {*} value The value to check.
	     * @returns {boolean} Returns `true` if `value` is a buffer, else `false`.
	     * @example
	     *
	     * _.isBuffer(new Buffer(2));
	     * // => true
	     *
	     * _.isBuffer(new Uint8Array(2));
	     * // => false
	     */
	    var isBuffer = !Buffer ? constant(false) : function(value) {
	      return value instanceof Buffer;
	    };

	    /**
	     * Checks if `value` is classified as a `Date` object.
	     *
	     * @static
	     * @memberOf _
	     * @since 0.1.0
	     * @category Lang
	     * @param {*} value The value to check.
	     * @returns {boolean} Returns `true` if `value` is correctly classified,
	     *  else `false`.
	     * @example
	     *
	     * _.isDate(new Date);
	     * // => true
	     *
	     * _.isDate('Mon April 23 2012');
	     * // => false
	     */
	    function isDate(value) {
	      return isObjectLike(value) && objectToString.call(value) == dateTag;
	    }

	    /**
	     * Checks if `value` is likely a DOM element.
	     *
	     * @static
	     * @memberOf _
	     * @since 0.1.0
	     * @category Lang
	     * @param {*} value The value to check.
	     * @returns {boolean} Returns `true` if `value` is a DOM element,
	     *  else `false`.
	     * @example
	     *
	     * _.isElement(document.body);
	     * // => true
	     *
	     * _.isElement('<body>');
	     * // => false
	     */
	    function isElement(value) {
	      return !!value && value.nodeType === 1 && isObjectLike(value) && !isPlainObject(value);
	    }

	    /**
	     * Checks if `value` is an empty object, collection, map, or set.
	     *
	     * Objects are considered empty if they have no own enumerable string keyed
	     * properties.
	     *
	     * Array-like values such as `arguments` objects, arrays, buffers, strings, or
	     * jQuery-like collections are considered empty if they have a `length` of `0`.
	     * Similarly, maps and sets are considered empty if they have a `size` of `0`.
	     *
	     * @static
	     * @memberOf _
	     * @since 0.1.0
	     * @category Lang
	     * @param {*} value The value to check.
	     * @returns {boolean} Returns `true` if `value` is empty, else `false`.
	     * @example
	     *
	     * _.isEmpty(null);
	     * // => true
	     *
	     * _.isEmpty(true);
	     * // => true
	     *
	     * _.isEmpty(1);
	     * // => true
	     *
	     * _.isEmpty([1, 2, 3]);
	     * // => false
	     *
	     * _.isEmpty({ 'a': 1 });
	     * // => false
	     */
	    function isEmpty(value) {
	      if (isArrayLike(value) &&
	          (isArray(value) || isString(value) || isFunction(value.splice) ||
	            isArguments(value) || isBuffer(value))) {
	        return !value.length;
	      }
	      if (isObjectLike(value)) {
	        var tag = getTag(value);
	        if (tag == mapTag || tag == setTag) {
	          return !value.size;
	        }
	      }
	      for (var key in value) {
	        if (hasOwnProperty.call(value, key)) {
	          return false;
	        }
	      }
	      return !(nonEnumShadows && keys(value).length);
	    }

	    /**
	     * Performs a deep comparison between two values to determine if they are
	     * equivalent.
	     *
	     * **Note:** This method supports comparing arrays, array buffers, booleans,
	     * date objects, error objects, maps, numbers, `Object` objects, regexes,
	     * sets, strings, symbols, and typed arrays. `Object` objects are compared
	     * by their own, not inherited, enumerable properties. Functions and DOM
	     * nodes are **not** supported.
	     *
	     * @static
	     * @memberOf _
	     * @since 0.1.0
	     * @category Lang
	     * @param {*} value The value to compare.
	     * @param {*} other The other value to compare.
	     * @returns {boolean} Returns `true` if the values are equivalent,
	     *  else `false`.
	     * @example
	     *
	     * var object = { 'user': 'fred' };
	     * var other = { 'user': 'fred' };
	     *
	     * _.isEqual(object, other);
	     * // => true
	     *
	     * object === other;
	     * // => false
	     */
	    function isEqual(value, other) {
	      return baseIsEqual(value, other);
	    }

	    /**
	     * This method is like `_.isEqual` except that it accepts `customizer` which
	     * is invoked to compare values. If `customizer` returns `undefined`, comparisons
	     * are handled by the method instead. The `customizer` is invoked with up to
	     * six arguments: (objValue, othValue [, index|key, object, other, stack]).
	     *
	     * @static
	     * @memberOf _
	     * @since 4.0.0
	     * @category Lang
	     * @param {*} value The value to compare.
	     * @param {*} other The other value to compare.
	     * @param {Function} [customizer] The function to customize comparisons.
	     * @returns {boolean} Returns `true` if the values are equivalent,
	     *  else `false`.
	     * @example
	     *
	     * function isGreeting(value) {
	     *   return /^h(?:i|ello)$/.test(value);
	     * }
	     *
	     * function customizer(objValue, othValue) {
	     *   if (isGreeting(objValue) && isGreeting(othValue)) {
	     *     return true;
	     *   }
	     * }
	     *
	     * var array = ['hello', 'goodbye'];
	     * var other = ['hi', 'goodbye'];
	     *
	     * _.isEqualWith(array, other, customizer);
	     * // => true
	     */
	    function isEqualWith(value, other, customizer) {
	      customizer = typeof customizer == 'function' ? customizer : undefined;
	      var result = customizer ? customizer(value, other) : undefined;
	      return result === undefined ? baseIsEqual(value, other, customizer) : !!result;
	    }

	    /**
	     * Checks if `value` is an `Error`, `EvalError`, `RangeError`, `ReferenceError`,
	     * `SyntaxError`, `TypeError`, or `URIError` object.
	     *
	     * @static
	     * @memberOf _
	     * @since 3.0.0
	     * @category Lang
	     * @param {*} value The value to check.
	     * @returns {boolean} Returns `true` if `value` is an error object,
	     *  else `false`.
	     * @example
	     *
	     * _.isError(new Error);
	     * // => true
	     *
	     * _.isError(Error);
	     * // => false
	     */
	    function isError(value) {
	      if (!isObjectLike(value)) {
	        return false;
	      }
	      return (objectToString.call(value) == errorTag) ||
	        (typeof value.message == 'string' && typeof value.name == 'string');
	    }

	    /**
	     * Checks if `value` is a finite primitive number.
	     *
	     * **Note:** This method is based on
	     * [`Number.isFinite`](https://mdn.io/Number/isFinite).
	     *
	     * @static
	     * @memberOf _
	     * @since 0.1.0
	     * @category Lang
	     * @param {*} value The value to check.
	     * @returns {boolean} Returns `true` if `value` is a finite number,
	     *  else `false`.
	     * @example
	     *
	     * _.isFinite(3);
	     * // => true
	     *
	     * _.isFinite(Number.MAX_VALUE);
	     * // => true
	     *
	     * _.isFinite(3.14);
	     * // => true
	     *
	     * _.isFinite(Infinity);
	     * // => false
	     */
	    function isFinite(value) {
	      return typeof value == 'number' && nativeIsFinite(value);
	    }

	    /**
	     * Checks if `value` is classified as a `Function` object.
	     *
	     * @static
	     * @memberOf _
	     * @since 0.1.0
	     * @category Lang
	     * @param {*} value The value to check.
	     * @returns {boolean} Returns `true` if `value` is correctly classified,
	     *  else `false`.
	     * @example
	     *
	     * _.isFunction(_);
	     * // => true
	     *
	     * _.isFunction(/abc/);
	     * // => false
	     */
	    function isFunction(value) {
	      // The use of `Object#toString` avoids issues with the `typeof` operator
	      // in Safari 8 which returns 'object' for typed array and weak map constructors,
	      // and PhantomJS 1.9 which returns 'function' for `NodeList` instances.
	      var tag = isObject(value) ? objectToString.call(value) : '';
	      return tag == funcTag || tag == genTag;
	    }

	    /**
	     * Checks if `value` is an integer.
	     *
	     * **Note:** This method is based on
	     * [`Number.isInteger`](https://mdn.io/Number/isInteger).
	     *
	     * @static
	     * @memberOf _
	     * @since 4.0.0
	     * @category Lang
	     * @param {*} value The value to check.
	     * @returns {boolean} Returns `true` if `value` is an integer, else `false`.
	     * @example
	     *
	     * _.isInteger(3);
	     * // => true
	     *
	     * _.isInteger(Number.MIN_VALUE);
	     * // => false
	     *
	     * _.isInteger(Infinity);
	     * // => false
	     *
	     * _.isInteger('3');
	     * // => false
	     */
	    function isInteger(value) {
	      return typeof value == 'number' && value == toInteger(value);
	    }

	    /**
	     * Checks if `value` is a valid array-like length.
	     *
	     * **Note:** This function is loosely based on
	     * [`ToLength`](http://ecma-international.org/ecma-262/6.0/#sec-tolength).
	     *
	     * @static
	     * @memberOf _
	     * @since 4.0.0
	     * @category Lang
	     * @param {*} value The value to check.
	     * @returns {boolean} Returns `true` if `value` is a valid length,
	     *  else `false`.
	     * @example
	     *
	     * _.isLength(3);
	     * // => true
	     *
	     * _.isLength(Number.MIN_VALUE);
	     * // => false
	     *
	     * _.isLength(Infinity);
	     * // => false
	     *
	     * _.isLength('3');
	     * // => false
	     */
	    function isLength(value) {
	      return typeof value == 'number' &&
	        value > -1 && value % 1 == 0 && value <= MAX_SAFE_INTEGER;
	    }

	    /**
	     * Checks if `value` is the
	     * [language type](http://www.ecma-international.org/ecma-262/6.0/#sec-ecmascript-language-types)
	     * of `Object`. (e.g. arrays, functions, objects, regexes, `new Number(0)`, and `new String('')`)
	     *
	     * @static
	     * @memberOf _
	     * @since 0.1.0
	     * @category Lang
	     * @param {*} value The value to check.
	     * @returns {boolean} Returns `true` if `value` is an object, else `false`.
	     * @example
	     *
	     * _.isObject({});
	     * // => true
	     *
	     * _.isObject([1, 2, 3]);
	     * // => true
	     *
	     * _.isObject(_.noop);
	     * // => true
	     *
	     * _.isObject(null);
	     * // => false
	     */
	    function isObject(value) {
	      var type = typeof value;
	      return !!value && (type == 'object' || type == 'function');
	    }

	    /**
	     * Checks if `value` is object-like. A value is object-like if it's not `null`
	     * and has a `typeof` result of "object".
	     *
	     * @static
	     * @memberOf _
	     * @since 4.0.0
	     * @category Lang
	     * @param {*} value The value to check.
	     * @returns {boolean} Returns `true` if `value` is object-like, else `false`.
	     * @example
	     *
	     * _.isObjectLike({});
	     * // => true
	     *
	     * _.isObjectLike([1, 2, 3]);
	     * // => true
	     *
	     * _.isObjectLike(_.noop);
	     * // => false
	     *
	     * _.isObjectLike(null);
	     * // => false
	     */
	    function isObjectLike(value) {
	      return !!value && typeof value == 'object';
	    }

	    /**
	     * Checks if `value` is classified as a `Map` object.
	     *
	     * @static
	     * @memberOf _
	     * @since 4.3.0
	     * @category Lang
	     * @param {*} value The value to check.
	     * @returns {boolean} Returns `true` if `value` is correctly classified,
	     *  else `false`.
	     * @example
	     *
	     * _.isMap(new Map);
	     * // => true
	     *
	     * _.isMap(new WeakMap);
	     * // => false
	     */
	    function isMap(value) {
	      return isObjectLike(value) && getTag(value) == mapTag;
	    }

	    /**
	     * Performs a partial deep comparison between `object` and `source` to
	     * determine if `object` contains equivalent property values. This method is
	     * equivalent to a `_.matches` function when `source` is partially applied.
	     *
	     * **Note:** This method supports comparing the same values as `_.isEqual`.
	     *
	     * @static
	     * @memberOf _
	     * @since 3.0.0
	     * @category Lang
	     * @param {Object} object The object to inspect.
	     * @param {Object} source The object of property values to match.
	     * @returns {boolean} Returns `true` if `object` is a match, else `false`.
	     * @example
	     *
	     * var object = { 'user': 'fred', 'age': 40 };
	     *
	     * _.isMatch(object, { 'age': 40 });
	     * // => true
	     *
	     * _.isMatch(object, { 'age': 36 });
	     * // => false
	     */
	    function isMatch(object, source) {
	      return object === source || baseIsMatch(object, source, getMatchData(source));
	    }

	    /**
	     * This method is like `_.isMatch` except that it accepts `customizer` which
	     * is invoked to compare values. If `customizer` returns `undefined`, comparisons
	     * are handled by the method instead. The `customizer` is invoked with five
	     * arguments: (objValue, srcValue, index|key, object, source).
	     *
	     * @static
	     * @memberOf _
	     * @since 4.0.0
	     * @category Lang
	     * @param {Object} object The object to inspect.
	     * @param {Object} source The object of property values to match.
	     * @param {Function} [customizer] The function to customize comparisons.
	     * @returns {boolean} Returns `true` if `object` is a match, else `false`.
	     * @example
	     *
	     * function isGreeting(value) {
	     *   return /^h(?:i|ello)$/.test(value);
	     * }
	     *
	     * function customizer(objValue, srcValue) {
	     *   if (isGreeting(objValue) && isGreeting(srcValue)) {
	     *     return true;
	     *   }
	     * }
	     *
	     * var object = { 'greeting': 'hello' };
	     * var source = { 'greeting': 'hi' };
	     *
	     * _.isMatchWith(object, source, customizer);
	     * // => true
	     */
	    function isMatchWith(object, source, customizer) {
	      customizer = typeof customizer == 'function' ? customizer : undefined;
	      return baseIsMatch(object, source, getMatchData(source), customizer);
	    }

	    /**
	     * Checks if `value` is `NaN`.
	     *
	     * **Note:** This method is based on
	     * [`Number.isNaN`](https://mdn.io/Number/isNaN) and is not the same as
	     * global [`isNaN`](https://mdn.io/isNaN) which returns `true` for
	     * `undefined` and other non-number values.
	     *
	     * @static
	     * @memberOf _
	     * @since 0.1.0
	     * @category Lang
	     * @param {*} value The value to check.
	     * @returns {boolean} Returns `true` if `value` is `NaN`, else `false`.
	     * @example
	     *
	     * _.isNaN(NaN);
	     * // => true
	     *
	     * _.isNaN(new Number(NaN));
	     * // => true
	     *
	     * isNaN(undefined);
	     * // => true
	     *
	     * _.isNaN(undefined);
	     * // => false
	     */
	    function isNaN(value) {
	      // An `NaN` primitive is the only value that is not equal to itself.
	      // Perform the `toStringTag` check first to avoid errors with some
	      // ActiveX objects in IE.
	      return isNumber(value) && value != +value;
	    }

	    /**
	     * Checks if `value` is a native function.
	     *
	     * @static
	     * @memberOf _
	     * @since 3.0.0
	     * @category Lang
	     * @param {*} value The value to check.
	     * @returns {boolean} Returns `true` if `value` is a native function,
	     *  else `false`.
	     * @example
	     *
	     * _.isNative(Array.prototype.push);
	     * // => true
	     *
	     * _.isNative(_);
	     * // => false
	     */
	    function isNative(value) {
	      if (!isObject(value)) {
	        return false;
	      }
	      var pattern = (isFunction(value) || isHostObject(value)) ? reIsNative : reIsHostCtor;
	      return pattern.test(toSource(value));
	    }

	    /**
	     * Checks if `value` is `null`.
	     *
	     * @static
	     * @memberOf _
	     * @since 0.1.0
	     * @category Lang
	     * @param {*} value The value to check.
	     * @returns {boolean} Returns `true` if `value` is `null`, else `false`.
	     * @example
	     *
	     * _.isNull(null);
	     * // => true
	     *
	     * _.isNull(void 0);
	     * // => false
	     */
	    function isNull(value) {
	      return value === null;
	    }

	    /**
	     * Checks if `value` is `null` or `undefined`.
	     *
	     * @static
	     * @memberOf _
	     * @since 4.0.0
	     * @category Lang
	     * @param {*} value The value to check.
	     * @returns {boolean} Returns `true` if `value` is nullish, else `false`.
	     * @example
	     *
	     * _.isNil(null);
	     * // => true
	     *
	     * _.isNil(void 0);
	     * // => true
	     *
	     * _.isNil(NaN);
	     * // => false
	     */
	    function isNil(value) {
	      return value == null;
	    }

	    /**
	     * Checks if `value` is classified as a `Number` primitive or object.
	     *
	     * **Note:** To exclude `Infinity`, `-Infinity`, and `NaN`, which are
	     * classified as numbers, use the `_.isFinite` method.
	     *
	     * @static
	     * @memberOf _
	     * @since 0.1.0
	     * @category Lang
	     * @param {*} value The value to check.
	     * @returns {boolean} Returns `true` if `value` is correctly classified,
	     *  else `false`.
	     * @example
	     *
	     * _.isNumber(3);
	     * // => true
	     *
	     * _.isNumber(Number.MIN_VALUE);
	     * // => true
	     *
	     * _.isNumber(Infinity);
	     * // => true
	     *
	     * _.isNumber('3');
	     * // => false
	     */
	    function isNumber(value) {
	      return typeof value == 'number' ||
	        (isObjectLike(value) && objectToString.call(value) == numberTag);
	    }

	    /**
	     * Checks if `value` is a plain object, that is, an object created by the
	     * `Object` constructor or one with a `[[Prototype]]` of `null`.
	     *
	     * @static
	     * @memberOf _
	     * @since 0.8.0
	     * @category Lang
	     * @param {*} value The value to check.
	     * @returns {boolean} Returns `true` if `value` is a plain object,
	     *  else `false`.
	     * @example
	     *
	     * function Foo() {
	     *   this.a = 1;
	     * }
	     *
	     * _.isPlainObject(new Foo);
	     * // => false
	     *
	     * _.isPlainObject([1, 2, 3]);
	     * // => false
	     *
	     * _.isPlainObject({ 'x': 0, 'y': 0 });
	     * // => true
	     *
	     * _.isPlainObject(Object.create(null));
	     * // => true
	     */
	    function isPlainObject(value) {
	      if (!isObjectLike(value) ||
	          objectToString.call(value) != objectTag || isHostObject(value)) {
	        return false;
	      }
	      var proto = getPrototype(value);
	      if (proto === null) {
	        return true;
	      }
	      var Ctor = hasOwnProperty.call(proto, 'constructor') && proto.constructor;
	      return (typeof Ctor == 'function' &&
	        Ctor instanceof Ctor && funcToString.call(Ctor) == objectCtorString);
	    }

	    /**
	     * Checks if `value` is classified as a `RegExp` object.
	     *
	     * @static
	     * @memberOf _
	     * @since 0.1.0
	     * @category Lang
	     * @param {*} value The value to check.
	     * @returns {boolean} Returns `true` if `value` is correctly classified,
	     *  else `false`.
	     * @example
	     *
	     * _.isRegExp(/abc/);
	     * // => true
	     *
	     * _.isRegExp('/abc/');
	     * // => false
	     */
	    function isRegExp(value) {
	      return isObject(value) && objectToString.call(value) == regexpTag;
	    }

	    /**
	     * Checks if `value` is a safe integer. An integer is safe if it's an IEEE-754
	     * double precision number which isn't the result of a rounded unsafe integer.
	     *
	     * **Note:** This method is based on
	     * [`Number.isSafeInteger`](https://mdn.io/Number/isSafeInteger).
	     *
	     * @static
	     * @memberOf _
	     * @since 4.0.0
	     * @category Lang
	     * @param {*} value The value to check.
	     * @returns {boolean} Returns `true` if `value` is a safe integer,
	     *  else `false`.
	     * @example
	     *
	     * _.isSafeInteger(3);
	     * // => true
	     *
	     * _.isSafeInteger(Number.MIN_VALUE);
	     * // => false
	     *
	     * _.isSafeInteger(Infinity);
	     * // => false
	     *
	     * _.isSafeInteger('3');
	     * // => false
	     */
	    function isSafeInteger(value) {
	      return isInteger(value) && value >= -MAX_SAFE_INTEGER && value <= MAX_SAFE_INTEGER;
	    }

	    /**
	     * Checks if `value` is classified as a `Set` object.
	     *
	     * @static
	     * @memberOf _
	     * @since 4.3.0
	     * @category Lang
	     * @param {*} value The value to check.
	     * @returns {boolean} Returns `true` if `value` is correctly classified,
	     *  else `false`.
	     * @example
	     *
	     * _.isSet(new Set);
	     * // => true
	     *
	     * _.isSet(new WeakSet);
	     * // => false
	     */
	    function isSet(value) {
	      return isObjectLike(value) && getTag(value) == setTag;
	    }

	    /**
	     * Checks if `value` is classified as a `String` primitive or object.
	     *
	     * @static
	     * @since 0.1.0
	     * @memberOf _
	     * @category Lang
	     * @param {*} value The value to check.
	     * @returns {boolean} Returns `true` if `value` is correctly classified,
	     *  else `false`.
	     * @example
	     *
	     * _.isString('abc');
	     * // => true
	     *
	     * _.isString(1);
	     * // => false
	     */
	    function isString(value) {
	      return typeof value == 'string' ||
	        (!isArray(value) && isObjectLike(value) && objectToString.call(value) == stringTag);
	    }

	    /**
	     * Checks if `value` is classified as a `Symbol` primitive or object.
	     *
	     * @static
	     * @memberOf _
	     * @since 4.0.0
	     * @category Lang
	     * @param {*} value The value to check.
	     * @returns {boolean} Returns `true` if `value` is correctly classified,
	     *  else `false`.
	     * @example
	     *
	     * _.isSymbol(Symbol.iterator);
	     * // => true
	     *
	     * _.isSymbol('abc');
	     * // => false
	     */
	    function isSymbol(value) {
	      return typeof value == 'symbol' ||
	        (isObjectLike(value) && objectToString.call(value) == symbolTag);
	    }

	    /**
	     * Checks if `value` is classified as a typed array.
	     *
	     * @static
	     * @memberOf _
	     * @since 3.0.0
	     * @category Lang
	     * @param {*} value The value to check.
	     * @returns {boolean} Returns `true` if `value` is correctly classified,
	     *  else `false`.
	     * @example
	     *
	     * _.isTypedArray(new Uint8Array);
	     * // => true
	     *
	     * _.isTypedArray([]);
	     * // => false
	     */
	    function isTypedArray(value) {
	      return isObjectLike(value) &&
	        isLength(value.length) && !!typedArrayTags[objectToString.call(value)];
	    }

	    /**
	     * Checks if `value` is `undefined`.
	     *
	     * @static
	     * @since 0.1.0
	     * @memberOf _
	     * @category Lang
	     * @param {*} value The value to check.
	     * @returns {boolean} Returns `true` if `value` is `undefined`, else `false`.
	     * @example
	     *
	     * _.isUndefined(void 0);
	     * // => true
	     *
	     * _.isUndefined(null);
	     * // => false
	     */
	    function isUndefined(value) {
	      return value === undefined;
	    }

	    /**
	     * Checks if `value` is classified as a `WeakMap` object.
	     *
	     * @static
	     * @memberOf _
	     * @since 4.3.0
	     * @category Lang
	     * @param {*} value The value to check.
	     * @returns {boolean} Returns `true` if `value` is correctly classified,
	     *  else `false`.
	     * @example
	     *
	     * _.isWeakMap(new WeakMap);
	     * // => true
	     *
	     * _.isWeakMap(new Map);
	     * // => false
	     */
	    function isWeakMap(value) {
	      return isObjectLike(value) && getTag(value) == weakMapTag;
	    }

	    /**
	     * Checks if `value` is classified as a `WeakSet` object.
	     *
	     * @static
	     * @memberOf _
	     * @since 4.3.0
	     * @category Lang
	     * @param {*} value The value to check.
	     * @returns {boolean} Returns `true` if `value` is correctly classified,
	     *  else `false`.
	     * @example
	     *
	     * _.isWeakSet(new WeakSet);
	     * // => true
	     *
	     * _.isWeakSet(new Set);
	     * // => false
	     */
	    function isWeakSet(value) {
	      return isObjectLike(value) && objectToString.call(value) == weakSetTag;
	    }

	    /**
	     * Checks if `value` is less than `other`.
	     *
	     * @static
	     * @memberOf _
	     * @since 3.9.0
	     * @category Lang
	     * @param {*} value The value to compare.
	     * @param {*} other The other value to compare.
	     * @returns {boolean} Returns `true` if `value` is less than `other`,
	     *  else `false`.
	     * @example
	     *
	     * _.lt(1, 3);
	     * // => true
	     *
	     * _.lt(3, 3);
	     * // => false
	     *
	     * _.lt(3, 1);
	     * // => false
	     */
	    function lt(value, other) {
	      return value < other;
	    }

	    /**
	     * Checks if `value` is less than or equal to `other`.
	     *
	     * @static
	     * @memberOf _
	     * @since 3.9.0
	     * @category Lang
	     * @param {*} value The value to compare.
	     * @param {*} other The other value to compare.
	     * @returns {boolean} Returns `true` if `value` is less than or equal to
	     *  `other`, else `false`.
	     * @example
	     *
	     * _.lte(1, 3);
	     * // => true
	     *
	     * _.lte(3, 3);
	     * // => true
	     *
	     * _.lte(3, 1);
	     * // => false
	     */
	    function lte(value, other) {
	      return value <= other;
	    }

	    /**
	     * Converts `value` to an array.
	     *
	     * @static
	     * @since 0.1.0
	     * @memberOf _
	     * @category Lang
	     * @param {*} value The value to convert.
	     * @returns {Array} Returns the converted array.
	     * @example
	     *
	     * _.toArray({ 'a': 1, 'b': 2 });
	     * // => [1, 2]
	     *
	     * _.toArray('abc');
	     * // => ['a', 'b', 'c']
	     *
	     * _.toArray(1);
	     * // => []
	     *
	     * _.toArray(null);
	     * // => []
	     */
	    function toArray(value) {
	      if (!value) {
	        return [];
	      }
	      if (isArrayLike(value)) {
	        return isString(value) ? stringToArray(value) : copyArray(value);
	      }
	      if (iteratorSymbol && value[iteratorSymbol]) {
	        return iteratorToArray(value[iteratorSymbol]());
	      }
	      var tag = getTag(value),
	          func = tag == mapTag ? mapToArray : (tag == setTag ? setToArray : values);

	      return func(value);
	    }

	    /**
	     * Converts `value` to an integer.
	     *
	     * **Note:** This function is loosely based on
	     * [`ToInteger`](http://www.ecma-international.org/ecma-262/6.0/#sec-tointeger).
	     *
	     * @static
	     * @memberOf _
	     * @since 4.0.0
	     * @category Lang
	     * @param {*} value The value to convert.
	     * @returns {number} Returns the converted integer.
	     * @example
	     *
	     * _.toInteger(3);
	     * // => 3
	     *
	     * _.toInteger(Number.MIN_VALUE);
	     * // => 0
	     *
	     * _.toInteger(Infinity);
	     * // => 1.7976931348623157e+308
	     *
	     * _.toInteger('3');
	     * // => 3
	     */
	    function toInteger(value) {
	      if (!value) {
	        return value === 0 ? value : 0;
	      }
	      value = toNumber(value);
	      if (value === INFINITY || value === -INFINITY) {
	        var sign = (value < 0 ? -1 : 1);
	        return sign * MAX_INTEGER;
	      }
	      var remainder = value % 1;
	      return value === value ? (remainder ? value - remainder : value) : 0;
	    }

	    /**
	     * Converts `value` to an integer suitable for use as the length of an
	     * array-like object.
	     *
	     * **Note:** This method is based on
	     * [`ToLength`](http://ecma-international.org/ecma-262/6.0/#sec-tolength).
	     *
	     * @static
	     * @memberOf _
	     * @since 4.0.0
	     * @category Lang
	     * @param {*} value The value to convert.
	     * @returns {number} Returns the converted integer.
	     * @example
	     *
	     * _.toLength(3);
	     * // => 3
	     *
	     * _.toLength(Number.MIN_VALUE);
	     * // => 0
	     *
	     * _.toLength(Infinity);
	     * // => 4294967295
	     *
	     * _.toLength('3');
	     * // => 3
	     */
	    function toLength(value) {
	      return value ? baseClamp(toInteger(value), 0, MAX_ARRAY_LENGTH) : 0;
	    }

	    /**
	     * Converts `value` to a number.
	     *
	     * @static
	     * @memberOf _
	     * @since 4.0.0
	     * @category Lang
	     * @param {*} value The value to process.
	     * @returns {number} Returns the number.
	     * @example
	     *
	     * _.toNumber(3);
	     * // => 3
	     *
	     * _.toNumber(Number.MIN_VALUE);
	     * // => 5e-324
	     *
	     * _.toNumber(Infinity);
	     * // => Infinity
	     *
	     * _.toNumber('3');
	     * // => 3
	     */
	    function toNumber(value) {
	      if (typeof value == 'number') {
	        return value;
	      }
	      if (isSymbol(value)) {
	        return NAN;
	      }
	      if (isObject(value)) {
	        var other = isFunction(value.valueOf) ? value.valueOf() : value;
	        value = isObject(other) ? (other + '') : other;
	      }
	      if (typeof value != 'string') {
	        return value === 0 ? value : +value;
	      }
	      value = value.replace(reTrim, '');
	      var isBinary = reIsBinary.test(value);
	      return (isBinary || reIsOctal.test(value))
	        ? freeParseInt(value.slice(2), isBinary ? 2 : 8)
	        : (reIsBadHex.test(value) ? NAN : +value);
	    }

	    /**
	     * Converts `value` to a plain object flattening inherited enumerable string
	     * keyed properties of `value` to own properties of the plain object.
	     *
	     * @static
	     * @memberOf _
	     * @since 3.0.0
	     * @category Lang
	     * @param {*} value The value to convert.
	     * @returns {Object} Returns the converted plain object.
	     * @example
	     *
	     * function Foo() {
	     *   this.b = 2;
	     * }
	     *
	     * Foo.prototype.c = 3;
	     *
	     * _.assign({ 'a': 1 }, new Foo);
	     * // => { 'a': 1, 'b': 2 }
	     *
	     * _.assign({ 'a': 1 }, _.toPlainObject(new Foo));
	     * // => { 'a': 1, 'b': 2, 'c': 3 }
	     */
	    function toPlainObject(value) {
	      return copyObject(value, keysIn(value));
	    }

	    /**
	     * Converts `value` to a safe integer. A safe integer can be compared and
	     * represented correctly.
	     *
	     * @static
	     * @memberOf _
	     * @since 4.0.0
	     * @category Lang
	     * @param {*} value The value to convert.
	     * @returns {number} Returns the converted integer.
	     * @example
	     *
	     * _.toSafeInteger(3);
	     * // => 3
	     *
	     * _.toSafeInteger(Number.MIN_VALUE);
	     * // => 0
	     *
	     * _.toSafeInteger(Infinity);
	     * // => 9007199254740991
	     *
	     * _.toSafeInteger('3');
	     * // => 3
	     */
	    function toSafeInteger(value) {
	      return baseClamp(toInteger(value), -MAX_SAFE_INTEGER, MAX_SAFE_INTEGER);
	    }

	    /**
	     * Converts `value` to a string. An empty string is returned for `null`
	     * and `undefined` values. The sign of `-0` is preserved.
	     *
	     * @static
	     * @memberOf _
	     * @since 4.0.0
	     * @category Lang
	     * @param {*} value The value to process.
	     * @returns {string} Returns the string.
	     * @example
	     *
	     * _.toString(null);
	     * // => ''
	     *
	     * _.toString(-0);
	     * // => '-0'
	     *
	     * _.toString([1, 2, 3]);
	     * // => '1,2,3'
	     */
	    function toString(value) {
	      // Exit early for strings to avoid a performance hit in some environments.
	      if (typeof value == 'string') {
	        return value;
	      }
	      if (value == null) {
	        return '';
	      }
	      if (isSymbol(value)) {
	        return symbolToString ? symbolToString.call(value) : '';
	      }
	      var result = (value + '');
	      return (result == '0' && (1 / value) == -INFINITY) ? '-0' : result;
	    }

	    /*------------------------------------------------------------------------*/

	    /**
	     * Assigns own enumerable string keyed properties of source objects to the
	     * destination object. Source objects are applied from left to right.
	     * Subsequent sources overwrite property assignments of previous sources.
	     *
	     * **Note:** This method mutates `object` and is loosely based on
	     * [`Object.assign`](https://mdn.io/Object/assign).
	     *
	     * @static
	     * @memberOf _
	     * @since 0.10.0
	     * @category Object
	     * @param {Object} object The destination object.
	     * @param {...Object} [sources] The source objects.
	     * @returns {Object} Returns `object`.
	     * @example
	     *
	     * function Foo() {
	     *   this.c = 3;
	     * }
	     *
	     * function Bar() {
	     *   this.e = 5;
	     * }
	     *
	     * Foo.prototype.d = 4;
	     * Bar.prototype.f = 6;
	     *
	     * _.assign({ 'a': 1 }, new Foo, new Bar);
	     * // => { 'a': 1, 'c': 3, 'e': 5 }
	     */
	    var assign = createAssigner(function(object, source) {
	      if (nonEnumShadows || isPrototype(source) || isArrayLike(source)) {
	        copyObject(source, keys(source), object);
	        return;
	      }
	      for (var key in source) {
	        if (hasOwnProperty.call(source, key)) {
	          assignValue(object, key, source[key]);
	        }
	      }
	    });

	    /**
	     * This method is like `_.assign` except that it iterates over own and
	     * inherited source properties.
	     *
	     * **Note:** This method mutates `object`.
	     *
	     * @static
	     * @memberOf _
	     * @since 4.0.0
	     * @alias extend
	     * @category Object
	     * @param {Object} object The destination object.
	     * @param {...Object} [sources] The source objects.
	     * @returns {Object} Returns `object`.
	     * @example
	     *
	     * function Foo() {
	     *   this.b = 2;
	     * }
	     *
	     * function Bar() {
	     *   this.d = 4;
	     * }
	     *
	     * Foo.prototype.c = 3;
	     * Bar.prototype.e = 5;
	     *
	     * _.assignIn({ 'a': 1 }, new Foo, new Bar);
	     * // => { 'a': 1, 'b': 2, 'c': 3, 'd': 4, 'e': 5 }
	     */
	    var assignIn = createAssigner(function(object, source) {
	      if (nonEnumShadows || isPrototype(source) || isArrayLike(source)) {
	        copyObject(source, keysIn(source), object);
	        return;
	      }
	      for (var key in source) {
	        assignValue(object, key, source[key]);
	      }
	    });

	    /**
	     * This method is like `_.assignIn` except that it accepts `customizer`
	     * which is invoked to produce the assigned values. If `customizer` returns
	     * `undefined`, assignment is handled by the method instead. The `customizer`
	     * is invoked with five arguments: (objValue, srcValue, key, object, source).
	     *
	     * **Note:** This method mutates `object`.
	     *
	     * @static
	     * @memberOf _
	     * @since 4.0.0
	     * @alias extendWith
	     * @category Object
	     * @param {Object} object The destination object.
	     * @param {...Object} sources The source objects.
	     * @param {Function} [customizer] The function to customize assigned values.
	     * @returns {Object} Returns `object`.
	     * @example
	     *
	     * function customizer(objValue, srcValue) {
	     *   return _.isUndefined(objValue) ? srcValue : objValue;
	     * }
	     *
	     * var defaults = _.partialRight(_.assignInWith, customizer);
	     *
	     * defaults({ 'a': 1 }, { 'b': 2 }, { 'a': 3 });
	     * // => { 'a': 1, 'b': 2 }
	     */
	    var assignInWith = createAssigner(function(object, source, srcIndex, customizer) {
	      copyObject(source, keysIn(source), object, customizer);
	    });

	    /**
	     * This method is like `_.assign` except that it accepts `customizer`
	     * which is invoked to produce the assigned values. If `customizer` returns
	     * `undefined`, assignment is handled by the method instead. The `customizer`
	     * is invoked with five arguments: (objValue, srcValue, key, object, source).
	     *
	     * **Note:** This method mutates `object`.
	     *
	     * @static
	     * @memberOf _
	     * @since 4.0.0
	     * @category Object
	     * @param {Object} object The destination object.
	     * @param {...Object} sources The source objects.
	     * @param {Function} [customizer] The function to customize assigned values.
	     * @returns {Object} Returns `object`.
	     * @example
	     *
	     * function customizer(objValue, srcValue) {
	     *   return _.isUndefined(objValue) ? srcValue : objValue;
	     * }
	     *
	     * var defaults = _.partialRight(_.assignWith, customizer);
	     *
	     * defaults({ 'a': 1 }, { 'b': 2 }, { 'a': 3 });
	     * // => { 'a': 1, 'b': 2 }
	     */
	    var assignWith = createAssigner(function(object, source, srcIndex, customizer) {
	      copyObject(source, keys(source), object, customizer);
	    });

	    /**
	     * Creates an array of values corresponding to `paths` of `object`.
	     *
	     * @static
	     * @memberOf _
	     * @since 1.0.0
	     * @category Object
	     * @param {Object} object The object to iterate over.
	     * @param {...(string|string[])} [paths] The property paths of elements to pick.
	     * @returns {Array} Returns the new array of picked elements.
	     * @example
	     *
	     * var object = { 'a': [{ 'b': { 'c': 3 } }, 4] };
	     *
	     * _.at(object, ['a[0].b.c', 'a[1]']);
	     * // => [3, 4]
	     *
	     * _.at(['a', 'b', 'c'], 0, 2);
	     * // => ['a', 'c']
	     */
	    var at = rest(function(object, paths) {
	      return baseAt(object, baseFlatten(paths, 1));
	    });

	    /**
	     * Creates an object that inherits from the `prototype` object. If a
	     * `properties` object is given, its own enumerable string keyed properties
	     * are assigned to the created object.
	     *
	     * @static
	     * @memberOf _
	     * @since 2.3.0
	     * @category Object
	     * @param {Object} prototype The object to inherit from.
	     * @param {Object} [properties] The properties to assign to the object.
	     * @returns {Object} Returns the new object.
	     * @example
	     *
	     * function Shape() {
	     *   this.x = 0;
	     *   this.y = 0;
	     * }
	     *
	     * function Circle() {
	     *   Shape.call(this);
	     * }
	     *
	     * Circle.prototype = _.create(Shape.prototype, {
	     *   'constructor': Circle
	     * });
	     *
	     * var circle = new Circle;
	     * circle instanceof Circle;
	     * // => true
	     *
	     * circle instanceof Shape;
	     * // => true
	     */
	    function create(prototype, properties) {
	      var result = baseCreate(prototype);
	      return properties ? baseAssign(result, properties) : result;
	    }

	    /**
	     * Assigns own and inherited enumerable string keyed properties of source
	     * objects to the destination object for all destination properties that
	     * resolve to `undefined`. Source objects are applied from left to right.
	     * Once a property is set, additional values of the same property are ignored.
	     *
	     * **Note:** This method mutates `object`.
	     *
	     * @static
	     * @since 0.1.0
	     * @memberOf _
	     * @category Object
	     * @param {Object} object The destination object.
	     * @param {...Object} [sources] The source objects.
	     * @returns {Object} Returns `object`.
	     * @example
	     *
	     * _.defaults({ 'user': 'barney' }, { 'age': 36 }, { 'user': 'fred' });
	     * // => { 'user': 'barney', 'age': 36 }
	     */
	    var defaults = rest(function(args) {
	      args.push(undefined, assignInDefaults);
	      return apply(assignInWith, undefined, args);
	    });

	    /**
	     * This method is like `_.defaults` except that it recursively assigns
	     * default properties.
	     *
	     * **Note:** This method mutates `object`.
	     *
	     * @static
	     * @memberOf _
	     * @since 3.10.0
	     * @category Object
	     * @param {Object} object The destination object.
	     * @param {...Object} [sources] The source objects.
	     * @returns {Object} Returns `object`.
	     * @example
	     *
	     * _.defaultsDeep({ 'user': { 'name': 'barney' } }, { 'user': { 'name': 'fred', 'age': 36 } });
	     * // => { 'user': { 'name': 'barney', 'age': 36 } }
	     *
	     */
	    var defaultsDeep = rest(function(args) {
	      args.push(undefined, mergeDefaults);
	      return apply(mergeWith, undefined, args);
	    });

	    /**
	     * This method is like `_.find` except that it returns the key of the first
	     * element `predicate` returns truthy for instead of the element itself.
	     *
	     * @static
	     * @memberOf _
	     * @since 1.1.0
	     * @category Object
	     * @param {Object} object The object to search.
	     * @param {Array|Function|Object|string} [predicate=_.identity]
	     *  The function invoked per iteration.
	     * @returns {string|undefined} Returns the key of the matched element,
	     *  else `undefined`.
	     * @example
	     *
	     * var users = {
	     *   'barney':  { 'age': 36, 'active': true },
	     *   'fred':    { 'age': 40, 'active': false },
	     *   'pebbles': { 'age': 1,  'active': true }
	     * };
	     *
	     * _.findKey(users, function(o) { return o.age < 40; });
	     * // => 'barney' (iteration order is not guaranteed)
	     *
	     * // The `_.matches` iteratee shorthand.
	     * _.findKey(users, { 'age': 1, 'active': true });
	     * // => 'pebbles'
	     *
	     * // The `_.matchesProperty` iteratee shorthand.
	     * _.findKey(users, ['active', false]);
	     * // => 'fred'
	     *
	     * // The `_.property` iteratee shorthand.
	     * _.findKey(users, 'active');
	     * // => 'barney'
	     */
	    function findKey(object, predicate) {
	      return baseFind(object, getIteratee(predicate, 3), baseForOwn, true);
	    }

	    /**
	     * This method is like `_.findKey` except that it iterates over elements of
	     * a collection in the opposite order.
	     *
	     * @static
	     * @memberOf _
	     * @since 2.0.0
	     * @category Object
	     * @param {Object} object The object to search.
	     * @param {Array|Function|Object|string} [predicate=_.identity]
	     *  The function invoked per iteration.
	     * @returns {string|undefined} Returns the key of the matched element,
	     *  else `undefined`.
	     * @example
	     *
	     * var users = {
	     *   'barney':  { 'age': 36, 'active': true },
	     *   'fred':    { 'age': 40, 'active': false },
	     *   'pebbles': { 'age': 1,  'active': true }
	     * };
	     *
	     * _.findLastKey(users, function(o) { return o.age < 40; });
	     * // => returns 'pebbles' assuming `_.findKey` returns 'barney'
	     *
	     * // The `_.matches` iteratee shorthand.
	     * _.findLastKey(users, { 'age': 36, 'active': true });
	     * // => 'barney'
	     *
	     * // The `_.matchesProperty` iteratee shorthand.
	     * _.findLastKey(users, ['active', false]);
	     * // => 'fred'
	     *
	     * // The `_.property` iteratee shorthand.
	     * _.findLastKey(users, 'active');
	     * // => 'pebbles'
	     */
	    function findLastKey(object, predicate) {
	      return baseFind(object, getIteratee(predicate, 3), baseForOwnRight, true);
	    }

	    /**
	     * Iterates over own and inherited enumerable string keyed properties of an
	     * object and invokes `iteratee` for each property. The iteratee is invoked
	     * with three arguments: (value, key, object). Iteratee functions may exit
	     * iteration early by explicitly returning `false`.
	     *
	     * @static
	     * @memberOf _
	     * @since 0.3.0
	     * @category Object
	     * @param {Object} object The object to iterate over.
	     * @param {Function} [iteratee=_.identity] The function invoked per iteration.
	     * @returns {Object} Returns `object`.
	     * @example
	     *
	     * function Foo() {
	     *   this.a = 1;
	     *   this.b = 2;
	     * }
	     *
	     * Foo.prototype.c = 3;
	     *
	     * _.forIn(new Foo, function(value, key) {
	     *   console.log(key);
	     * });
	     * // => Logs 'a', 'b', then 'c' (iteration order is not guaranteed).
	     */
	    function forIn(object, iteratee) {
	      return object == null
	        ? object
	        : baseFor(object, getIteratee(iteratee), keysIn);
	    }

	    /**
	     * This method is like `_.forIn` except that it iterates over properties of
	     * `object` in the opposite order.
	     *
	     * @static
	     * @memberOf _
	     * @since 2.0.0
	     * @category Object
	     * @param {Object} object The object to iterate over.
	     * @param {Function} [iteratee=_.identity] The function invoked per iteration.
	     * @returns {Object} Returns `object`.
	     * @example
	     *
	     * function Foo() {
	     *   this.a = 1;
	     *   this.b = 2;
	     * }
	     *
	     * Foo.prototype.c = 3;
	     *
	     * _.forInRight(new Foo, function(value, key) {
	     *   console.log(key);
	     * });
	     * // => Logs 'c', 'b', then 'a' assuming `_.forIn` logs 'a', 'b', then 'c'.
	     */
	    function forInRight(object, iteratee) {
	      return object == null
	        ? object
	        : baseForRight(object, getIteratee(iteratee), keysIn);
	    }

	    /**
	     * Iterates over own enumerable string keyed properties of an object and
	     * invokes `iteratee` for each property. The iteratee is invoked with three
	     * arguments: (value, key, object). Iteratee functions may exit iteration
	     * early by explicitly returning `false`.
	     *
	     * @static
	     * @memberOf _
	     * @since 0.3.0
	     * @category Object
	     * @param {Object} object The object to iterate over.
	     * @param {Function} [iteratee=_.identity] The function invoked per iteration.
	     * @returns {Object} Returns `object`.
	     * @example
	     *
	     * function Foo() {
	     *   this.a = 1;
	     *   this.b = 2;
	     * }
	     *
	     * Foo.prototype.c = 3;
	     *
	     * _.forOwn(new Foo, function(value, key) {
	     *   console.log(key);
	     * });
	     * // => Logs 'a' then 'b' (iteration order is not guaranteed).
	     */
	    function forOwn(object, iteratee) {
	      return object && baseForOwn(object, getIteratee(iteratee));
	    }

	    /**
	     * This method is like `_.forOwn` except that it iterates over properties of
	     * `object` in the opposite order.
	     *
	     * @static
	     * @memberOf _
	     * @since 2.0.0
	     * @category Object
	     * @param {Object} object The object to iterate over.
	     * @param {Function} [iteratee=_.identity] The function invoked per iteration.
	     * @returns {Object} Returns `object`.
	     * @example
	     *
	     * function Foo() {
	     *   this.a = 1;
	     *   this.b = 2;
	     * }
	     *
	     * Foo.prototype.c = 3;
	     *
	     * _.forOwnRight(new Foo, function(value, key) {
	     *   console.log(key);
	     * });
	     * // => Logs 'b' then 'a' assuming `_.forOwn` logs 'a' then 'b'.
	     */
	    function forOwnRight(object, iteratee) {
	      return object && baseForOwnRight(object, getIteratee(iteratee));
	    }

	    /**
	     * Creates an array of function property names from own enumerable properties
	     * of `object`.
	     *
	     * @static
	     * @since 0.1.0
	     * @memberOf _
	     * @category Object
	     * @param {Object} object The object to inspect.
	     * @returns {Array} Returns the new array of property names.
	     * @example
	     *
	     * function Foo() {
	     *   this.a = _.constant('a');
	     *   this.b = _.constant('b');
	     * }
	     *
	     * Foo.prototype.c = _.constant('c');
	     *
	     * _.functions(new Foo);
	     * // => ['a', 'b']
	     */
	    function functions(object) {
	      return object == null ? [] : baseFunctions(object, keys(object));
	    }

	    /**
	     * Creates an array of function property names from own and inherited
	     * enumerable properties of `object`.
	     *
	     * @static
	     * @memberOf _
	     * @since 4.0.0
	     * @category Object
	     * @param {Object} object The object to inspect.
	     * @returns {Array} Returns the new array of property names.
	     * @example
	     *
	     * function Foo() {
	     *   this.a = _.constant('a');
	     *   this.b = _.constant('b');
	     * }
	     *
	     * Foo.prototype.c = _.constant('c');
	     *
	     * _.functionsIn(new Foo);
	     * // => ['a', 'b', 'c']
	     */
	    function functionsIn(object) {
	      return object == null ? [] : baseFunctions(object, keysIn(object));
	    }

	    /**
	     * Gets the value at `path` of `object`. If the resolved value is
	     * `undefined`, the `defaultValue` is used in its place.
	     *
	     * @static
	     * @memberOf _
	     * @since 3.7.0
	     * @category Object
	     * @param {Object} object The object to query.
	     * @param {Array|string} path The path of the property to get.
	     * @param {*} [defaultValue] The value returned for `undefined` resolved values.
	     * @returns {*} Returns the resolved value.
	     * @example
	     *
	     * var object = { 'a': [{ 'b': { 'c': 3 } }] };
	     *
	     * _.get(object, 'a[0].b.c');
	     * // => 3
	     *
	     * _.get(object, ['a', '0', 'b', 'c']);
	     * // => 3
	     *
	     * _.get(object, 'a.b.c', 'default');
	     * // => 'default'
	     */
	    function get(object, path, defaultValue) {
	      var result = object == null ? undefined : baseGet(object, path);
	      return result === undefined ? defaultValue : result;
	    }

	    /**
	     * Checks if `path` is a direct property of `object`.
	     *
	     * @static
	     * @since 0.1.0
	     * @memberOf _
	     * @category Object
	     * @param {Object} object The object to query.
	     * @param {Array|string} path The path to check.
	     * @returns {boolean} Returns `true` if `path` exists, else `false`.
	     * @example
	     *
	     * var object = { 'a': { 'b': 2 } };
	     * var other = _.create({ 'a': _.create({ 'b': 2 }) });
	     *
	     * _.has(object, 'a');
	     * // => true
	     *
	     * _.has(object, 'a.b');
	     * // => true
	     *
	     * _.has(object, ['a', 'b']);
	     * // => true
	     *
	     * _.has(other, 'a');
	     * // => false
	     */
	    function has(object, path) {
	      return object != null && hasPath(object, path, baseHas);
	    }

	    /**
	     * Checks if `path` is a direct or inherited property of `object`.
	     *
	     * @static
	     * @memberOf _
	     * @since 4.0.0
	     * @category Object
	     * @param {Object} object The object to query.
	     * @param {Array|string} path The path to check.
	     * @returns {boolean} Returns `true` if `path` exists, else `false`.
	     * @example
	     *
	     * var object = _.create({ 'a': _.create({ 'b': 2 }) });
	     *
	     * _.hasIn(object, 'a');
	     * // => true
	     *
	     * _.hasIn(object, 'a.b');
	     * // => true
	     *
	     * _.hasIn(object, ['a', 'b']);
	     * // => true
	     *
	     * _.hasIn(object, 'b');
	     * // => false
	     */
	    function hasIn(object, path) {
	      return object != null && hasPath(object, path, baseHasIn);
	    }

	    /**
	     * Creates an object composed of the inverted keys and values of `object`.
	     * If `object` contains duplicate values, subsequent values overwrite
	     * property assignments of previous values.
	     *
	     * @static
	     * @memberOf _
	     * @since 0.7.0
	     * @category Object
	     * @param {Object} object The object to invert.
	     * @returns {Object} Returns the new inverted object.
	     * @example
	     *
	     * var object = { 'a': 1, 'b': 2, 'c': 1 };
	     *
	     * _.invert(object);
	     * // => { '1': 'c', '2': 'b' }
	     */
	    var invert = createInverter(function(result, value, key) {
	      result[value] = key;
	    }, constant(identity));

	    /**
	     * This method is like `_.invert` except that the inverted object is generated
	     * from the results of running each element of `object` thru `iteratee`. The
	     * corresponding inverted value of each inverted key is an array of keys
	     * responsible for generating the inverted value. The iteratee is invoked
	     * with one argument: (value).
	     *
	     * @static
	     * @memberOf _
	     * @since 4.1.0
	     * @category Object
	     * @param {Object} object The object to invert.
	     * @param {Array|Function|Object|string} [iteratee=_.identity]
	     *  The iteratee invoked per element.
	     * @returns {Object} Returns the new inverted object.
	     * @example
	     *
	     * var object = { 'a': 1, 'b': 2, 'c': 1 };
	     *
	     * _.invertBy(object);
	     * // => { '1': ['a', 'c'], '2': ['b'] }
	     *
	     * _.invertBy(object, function(value) {
	     *   return 'group' + value;
	     * });
	     * // => { 'group1': ['a', 'c'], 'group2': ['b'] }
	     */
	    var invertBy = createInverter(function(result, value, key) {
	      if (hasOwnProperty.call(result, value)) {
	        result[value].push(key);
	      } else {
	        result[value] = [key];
	      }
	    }, getIteratee);

	    /**
	     * Invokes the method at `path` of `object`.
	     *
	     * @static
	     * @memberOf _
	     * @since 4.0.0
	     * @category Object
	     * @param {Object} object The object to query.
	     * @param {Array|string} path The path of the method to invoke.
	     * @param {...*} [args] The arguments to invoke the method with.
	     * @returns {*} Returns the result of the invoked method.
	     * @example
	     *
	     * var object = { 'a': [{ 'b': { 'c': [1, 2, 3, 4] } }] };
	     *
	     * _.invoke(object, 'a[0].b.c.slice', 1, 3);
	     * // => [2, 3]
	     */
	    var invoke = rest(baseInvoke);

	    /**
	     * Creates an array of the own enumerable property names of `object`.
	     *
	     * **Note:** Non-object values are coerced to objects. See the
	     * [ES spec](http://ecma-international.org/ecma-262/6.0/#sec-object.keys)
	     * for more details.
	     *
	     * @static
	     * @since 0.1.0
	     * @memberOf _
	     * @category Object
	     * @param {Object} object The object to query.
	     * @returns {Array} Returns the array of property names.
	     * @example
	     *
	     * function Foo() {
	     *   this.a = 1;
	     *   this.b = 2;
	     * }
	     *
	     * Foo.prototype.c = 3;
	     *
	     * _.keys(new Foo);
	     * // => ['a', 'b'] (iteration order is not guaranteed)
	     *
	     * _.keys('hi');
	     * // => ['0', '1']
	     */
	    function keys(object) {
	      var isProto = isPrototype(object);
	      if (!(isProto || isArrayLike(object))) {
	        return baseKeys(object);
	      }
	      var indexes = indexKeys(object),
	          skipIndexes = !!indexes,
	          result = indexes || [],
	          length = result.length;

	      for (var key in object) {
	        if (baseHas(object, key) &&
	            !(skipIndexes && (key == 'length' || isIndex(key, length))) &&
	            !(isProto && key == 'constructor')) {
	          result.push(key);
	        }
	      }
	      return result;
	    }

	    /**
	     * Creates an array of the own and inherited enumerable property names of `object`.
	     *
	     * **Note:** Non-object values are coerced to objects.
	     *
	     * @static
	     * @memberOf _
	     * @since 3.0.0
	     * @category Object
	     * @param {Object} object The object to query.
	     * @returns {Array} Returns the array of property names.
	     * @example
	     *
	     * function Foo() {
	     *   this.a = 1;
	     *   this.b = 2;
	     * }
	     *
	     * Foo.prototype.c = 3;
	     *
	     * _.keysIn(new Foo);
	     * // => ['a', 'b', 'c'] (iteration order is not guaranteed)
	     */
	    function keysIn(object) {
	      var index = -1,
	          isProto = isPrototype(object),
	          props = baseKeysIn(object),
	          propsLength = props.length,
	          indexes = indexKeys(object),
	          skipIndexes = !!indexes,
	          result = indexes || [],
	          length = result.length;

	      while (++index < propsLength) {
	        var key = props[index];
	        if (!(skipIndexes && (key == 'length' || isIndex(key, length))) &&
	            !(key == 'constructor' && (isProto || !hasOwnProperty.call(object, key)))) {
	          result.push(key);
	        }
	      }
	      return result;
	    }

	    /**
	     * The opposite of `_.mapValues`; this method creates an object with the
	     * same values as `object` and keys generated by running each own enumerable
	     * string keyed property of `object` thru `iteratee`. The iteratee is invoked
	     * with three arguments: (value, key, object).
	     *
	     * @static
	     * @memberOf _
	     * @since 3.8.0
	     * @category Object
	     * @param {Object} object The object to iterate over.
	     * @param {Array|Function|Object|string} [iteratee=_.identity]
	     *  The function invoked per iteration.
	     * @returns {Object} Returns the new mapped object.
	     * @example
	     *
	     * _.mapKeys({ 'a': 1, 'b': 2 }, function(value, key) {
	     *   return key + value;
	     * });
	     * // => { 'a1': 1, 'b2': 2 }
	     */
	    function mapKeys(object, iteratee) {
	      var result = {};
	      iteratee = getIteratee(iteratee, 3);

	      baseForOwn(object, function(value, key, object) {
	        result[iteratee(value, key, object)] = value;
	      });
	      return result;
	    }

	    /**
	     * Creates an object with the same keys as `object` and values generated
	     * by running each own enumerable string keyed property of `object` thru
	     * `iteratee`. The iteratee is invoked with three arguments:
	     * (value, key, object).
	     *
	     * @static
	     * @memberOf _
	     * @since 2.4.0
	     * @category Object
	     * @param {Object} object The object to iterate over.
	     * @param {Array|Function|Object|string} [iteratee=_.identity]
	     *  The function invoked per iteration.
	     * @returns {Object} Returns the new mapped object.
	     * @example
	     *
	     * var users = {
	     *   'fred':    { 'user': 'fred',    'age': 40 },
	     *   'pebbles': { 'user': 'pebbles', 'age': 1 }
	     * };
	     *
	     * _.mapValues(users, function(o) { return o.age; });
	     * // => { 'fred': 40, 'pebbles': 1 } (iteration order is not guaranteed)
	     *
	     * // The `_.property` iteratee shorthand.
	     * _.mapValues(users, 'age');
	     * // => { 'fred': 40, 'pebbles': 1 } (iteration order is not guaranteed)
	     */
	    function mapValues(object, iteratee) {
	      var result = {};
	      iteratee = getIteratee(iteratee, 3);

	      baseForOwn(object, function(value, key, object) {
	        result[key] = iteratee(value, key, object);
	      });
	      return result;
	    }

	    /**
	     * This method is like `_.assign` except that it recursively merges own and
	     * inherited enumerable string keyed properties of source objects into the
	     * destination object. Source properties that resolve to `undefined` are
	     * skipped if a destination value exists. Array and plain object properties
	     * are merged recursively.Other objects and value types are overridden by
	     * assignment. Source objects are applied from left to right. Subsequent
	     * sources overwrite property assignments of previous sources.
	     *
	     * **Note:** This method mutates `object`.
	     *
	     * @static
	     * @memberOf _
	     * @since 0.5.0
	     * @category Object
	     * @param {Object} object The destination object.
	     * @param {...Object} [sources] The source objects.
	     * @returns {Object} Returns `object`.
	     * @example
	     *
	     * var users = {
	     *   'data': [{ 'user': 'barney' }, { 'user': 'fred' }]
	     * };
	     *
	     * var ages = {
	     *   'data': [{ 'age': 36 }, { 'age': 40 }]
	     * };
	     *
	     * _.merge(users, ages);
	     * // => { 'data': [{ 'user': 'barney', 'age': 36 }, { 'user': 'fred', 'age': 40 }] }
	     */
	    var merge = createAssigner(function(object, source, srcIndex) {
	      baseMerge(object, source, srcIndex);
	    });

	    /**
	     * This method is like `_.merge` except that it accepts `customizer` which
	     * is invoked to produce the merged values of the destination and source
	     * properties. If `customizer` returns `undefined`, merging is handled by the
	     * method instead. The `customizer` is invoked with seven arguments:
	     * (objValue, srcValue, key, object, source, stack).
	     *
	     * **Note:** This method mutates `object`.
	     *
	     * @static
	     * @memberOf _
	     * @since 4.0.0
	     * @category Object
	     * @param {Object} object The destination object.
	     * @param {...Object} sources The source objects.
	     * @param {Function} customizer The function to customize assigned values.
	     * @returns {Object} Returns `object`.
	     * @example
	     *
	     * function customizer(objValue, srcValue) {
	     *   if (_.isArray(objValue)) {
	     *     return objValue.concat(srcValue);
	     *   }
	     * }
	     *
	     * var object = {
	     *   'fruits': ['apple'],
	     *   'vegetables': ['beet']
	     * };
	     *
	     * var other = {
	     *   'fruits': ['banana'],
	     *   'vegetables': ['carrot']
	     * };
	     *
	     * _.mergeWith(object, other, customizer);
	     * // => { 'fruits': ['apple', 'banana'], 'vegetables': ['beet', 'carrot'] }
	     */
	    var mergeWith = createAssigner(function(object, source, srcIndex, customizer) {
	      baseMerge(object, source, srcIndex, customizer);
	    });

	    /**
	     * The opposite of `_.pick`; this method creates an object composed of the
	     * own and inherited enumerable string keyed properties of `object` that are
	     * not omitted.
	     *
	     * @static
	     * @since 0.1.0
	     * @memberOf _
	     * @category Object
	     * @param {Object} object The source object.
	     * @param {...(string|string[])} [props] The property identifiers to omit.
	     * @returns {Object} Returns the new object.
	     * @example
	     *
	     * var object = { 'a': 1, 'b': '2', 'c': 3 };
	     *
	     * _.omit(object, ['a', 'c']);
	     * // => { 'b': '2' }
	     */
	    var omit = rest(function(object, props) {
	      if (object == null) {
	        return {};
	      }
	      props = arrayMap(baseFlatten(props, 1), toKey);
	      return basePick(object, baseDifference(getAllKeysIn(object), props));
	    });

	    /**
	     * The opposite of `_.pickBy`; this method creates an object composed of
	     * the own and inherited enumerable string keyed properties of `object` that
	     * `predicate` doesn't return truthy for. The predicate is invoked with two
	     * arguments: (value, key).
	     *
	     * @static
	     * @memberOf _
	     * @since 4.0.0
	     * @category Object
	     * @param {Object} object The source object.
	     * @param {Array|Function|Object|string} [predicate=_.identity]
	     *  The function invoked per property.
	     * @returns {Object} Returns the new object.
	     * @example
	     *
	     * var object = { 'a': 1, 'b': '2', 'c': 3 };
	     *
	     * _.omitBy(object, _.isNumber);
	     * // => { 'b': '2' }
	     */
	    function omitBy(object, predicate) {
	      predicate = getIteratee(predicate);
	      return basePickBy(object, function(value, key) {
	        return !predicate(value, key);
	      });
	    }

	    /**
	     * Creates an object composed of the picked `object` properties.
	     *
	     * @static
	     * @since 0.1.0
	     * @memberOf _
	     * @category Object
	     * @param {Object} object The source object.
	     * @param {...(string|string[])} [props] The property identifiers to pick.
	     * @returns {Object} Returns the new object.
	     * @example
	     *
	     * var object = { 'a': 1, 'b': '2', 'c': 3 };
	     *
	     * _.pick(object, ['a', 'c']);
	     * // => { 'a': 1, 'c': 3 }
	     */
	    var pick = rest(function(object, props) {
	      return object == null ? {} : basePick(object, baseFlatten(props, 1));
	    });

	    /**
	     * Creates an object composed of the `object` properties `predicate` returns
	     * truthy for. The predicate is invoked with two arguments: (value, key).
	     *
	     * @static
	     * @memberOf _
	     * @since 4.0.0
	     * @category Object
	     * @param {Object} object The source object.
	     * @param {Array|Function|Object|string} [predicate=_.identity]
	     *  The function invoked per property.
	     * @returns {Object} Returns the new object.
	     * @example
	     *
	     * var object = { 'a': 1, 'b': '2', 'c': 3 };
	     *
	     * _.pickBy(object, _.isNumber);
	     * // => { 'a': 1, 'c': 3 }
	     */
	    function pickBy(object, predicate) {
	      return object == null ? {} : basePickBy(object, getIteratee(predicate));
	    }

	    /**
	     * This method is like `_.get` except that if the resolved value is a
	     * function it's invoked with the `this` binding of its parent object and
	     * its result is returned.
	     *
	     * @static
	     * @since 0.1.0
	     * @memberOf _
	     * @category Object
	     * @param {Object} object The object to query.
	     * @param {Array|string} path The path of the property to resolve.
	     * @param {*} [defaultValue] The value returned for `undefined` resolved values.
	     * @returns {*} Returns the resolved value.
	     * @example
	     *
	     * var object = { 'a': [{ 'b': { 'c1': 3, 'c2': _.constant(4) } }] };
	     *
	     * _.result(object, 'a[0].b.c1');
	     * // => 3
	     *
	     * _.result(object, 'a[0].b.c2');
	     * // => 4
	     *
	     * _.result(object, 'a[0].b.c3', 'default');
	     * // => 'default'
	     *
	     * _.result(object, 'a[0].b.c3', _.constant('default'));
	     * // => 'default'
	     */
	    function result(object, path, defaultValue) {
	      path = isKey(path, object) ? [path] : castPath(path);

	      var index = -1,
	          length = path.length;

	      // Ensure the loop is entered when path is empty.
	      if (!length) {
	        object = undefined;
	        length = 1;
	      }
	      while (++index < length) {
	        var value = object == null ? undefined : object[path[index]];
	        if (value === undefined) {
	          index = length;
	          value = defaultValue;
	        }
	        object = isFunction(value) ? value.call(object) : value;
	      }
	      return object;
	    }

	    /**
	     * Sets the value at `path` of `object`. If a portion of `path` doesn't exist,
	     * it's created. Arrays are created for missing index properties while objects
	     * are created for all other missing properties. Use `_.setWith` to customize
	     * `path` creation.
	     *
	     * **Note:** This method mutates `object`.
	     *
	     * @static
	     * @memberOf _
	     * @since 3.7.0
	     * @category Object
	     * @param {Object} object The object to modify.
	     * @param {Array|string} path The path of the property to set.
	     * @param {*} value The value to set.
	     * @returns {Object} Returns `object`.
	     * @example
	     *
	     * var object = { 'a': [{ 'b': { 'c': 3 } }] };
	     *
	     * _.set(object, 'a[0].b.c', 4);
	     * console.log(object.a[0].b.c);
	     * // => 4
	     *
	     * _.set(object, ['x', '0', 'y', 'z'], 5);
	     * console.log(object.x[0].y.z);
	     * // => 5
	     */
	    function set(object, path, value) {
	      return object == null ? object : baseSet(object, path, value);
	    }

	    /**
	     * This method is like `_.set` except that it accepts `customizer` which is
	     * invoked to produce the objects of `path`.  If `customizer` returns `undefined`
	     * path creation is handled by the method instead. The `customizer` is invoked
	     * with three arguments: (nsValue, key, nsObject).
	     *
	     * **Note:** This method mutates `object`.
	     *
	     * @static
	     * @memberOf _
	     * @since 4.0.0
	     * @category Object
	     * @param {Object} object The object to modify.
	     * @param {Array|string} path The path of the property to set.
	     * @param {*} value The value to set.
	     * @param {Function} [customizer] The function to customize assigned values.
	     * @returns {Object} Returns `object`.
	     * @example
	     *
	     * var object = {};
	     *
	     * _.setWith(object, '[0][1]', 'a', Object);
	     * // => { '0': { '1': 'a' } }
	     */
	    function setWith(object, path, value, customizer) {
	      customizer = typeof customizer == 'function' ? customizer : undefined;
	      return object == null ? object : baseSet(object, path, value, customizer);
	    }

	    /**
	     * Creates an array of own enumerable string keyed-value pairs for `object`
	     * which can be consumed by `_.fromPairs`.
	     *
	     * @static
	     * @memberOf _
	     * @since 4.0.0
	     * @alias entries
	     * @category Object
	     * @param {Object} object The object to query.
	     * @returns {Array} Returns the new array of key-value pairs.
	     * @example
	     *
	     * function Foo() {
	     *   this.a = 1;
	     *   this.b = 2;
	     * }
	     *
	     * Foo.prototype.c = 3;
	     *
	     * _.toPairs(new Foo);
	     * // => [['a', 1], ['b', 2]] (iteration order is not guaranteed)
	     */
	    function toPairs(object) {
	      return baseToPairs(object, keys(object));
	    }

	    /**
	     * Creates an array of own and inherited enumerable string keyed-value pairs
	     * for `object` which can be consumed by `_.fromPairs`.
	     *
	     * @static
	     * @memberOf _
	     * @since 4.0.0
	     * @alias entriesIn
	     * @category Object
	     * @param {Object} object The object to query.
	     * @returns {Array} Returns the new array of key-value pairs.
	     * @example
	     *
	     * function Foo() {
	     *   this.a = 1;
	     *   this.b = 2;
	     * }
	     *
	     * Foo.prototype.c = 3;
	     *
	     * _.toPairsIn(new Foo);
	     * // => [['a', 1], ['b', 2], ['c', 1]] (iteration order is not guaranteed)
	     */
	    function toPairsIn(object) {
	      return baseToPairs(object, keysIn(object));
	    }

	    /**
	     * An alternative to `_.reduce`; this method transforms `object` to a new
	     * `accumulator` object which is the result of running each of its own
	     * enumerable string keyed properties thru `iteratee`, with each invocation
	     * potentially mutating the `accumulator` object. The iteratee is invoked
	     * with four arguments: (accumulator, value, key, object). Iteratee functions
	     * may exit iteration early by explicitly returning `false`.
	     *
	     * @static
	     * @memberOf _
	     * @since 1.3.0
	     * @category Object
	     * @param {Array|Object} object The object to iterate over.
	     * @param {Function} [iteratee=_.identity] The function invoked per iteration.
	     * @param {*} [accumulator] The custom accumulator value.
	     * @returns {*} Returns the accumulated value.
	     * @example
	     *
	     * _.transform([2, 3, 4], function(result, n) {
	     *   result.push(n *= n);
	     *   return n % 2 == 0;
	     * }, []);
	     * // => [4, 9]
	     *
	     * _.transform({ 'a': 1, 'b': 2, 'c': 1 }, function(result, value, key) {
	     *   (result[value] || (result[value] = [])).push(key);
	     * }, {});
	     * // => { '1': ['a', 'c'], '2': ['b'] }
	     */
	    function transform(object, iteratee, accumulator) {
	      var isArr = isArray(object) || isTypedArray(object);
	      iteratee = getIteratee(iteratee, 4);

	      if (accumulator == null) {
	        if (isArr || isObject(object)) {
	          var Ctor = object.constructor;
	          if (isArr) {
	            accumulator = isArray(object) ? new Ctor : [];
	          } else {
	            accumulator = isFunction(Ctor) ? baseCreate(getPrototype(object)) : {};
	          }
	        } else {
	          accumulator = {};
	        }
	      }
	      (isArr ? arrayEach : baseForOwn)(object, function(value, index, object) {
	        return iteratee(accumulator, value, index, object);
	      });
	      return accumulator;
	    }

	    /**
	     * Removes the property at `path` of `object`.
	     *
	     * **Note:** This method mutates `object`.
	     *
	     * @static
	     * @memberOf _
	     * @since 4.0.0
	     * @category Object
	     * @param {Object} object The object to modify.
	     * @param {Array|string} path The path of the property to unset.
	     * @returns {boolean} Returns `true` if the property is deleted, else `false`.
	     * @example
	     *
	     * var object = { 'a': [{ 'b': { 'c': 7 } }] };
	     * _.unset(object, 'a[0].b.c');
	     * // => true
	     *
	     * console.log(object);
	     * // => { 'a': [{ 'b': {} }] };
	     *
	     * _.unset(object, ['a', '0', 'b', 'c']);
	     * // => true
	     *
	     * console.log(object);
	     * // => { 'a': [{ 'b': {} }] };
	     */
	    function unset(object, path) {
	      return object == null ? true : baseUnset(object, path);
	    }

	    /**
	     * This method is like `_.set` except that accepts `updater` to produce the
	     * value to set. Use `_.updateWith` to customize `path` creation. The `updater`
	     * is invoked with one argument: (value).
	     *
	     * **Note:** This method mutates `object`.
	     *
	     * @static
	     * @memberOf _
	     * @since 4.6.0
	     * @category Object
	     * @param {Object} object The object to modify.
	     * @param {Array|string} path The path of the property to set.
	     * @param {Function} updater The function to produce the updated value.
	     * @returns {Object} Returns `object`.
	     * @example
	     *
	     * var object = { 'a': [{ 'b': { 'c': 3 } }] };
	     *
	     * _.update(object, 'a[0].b.c', function(n) { return n * n; });
	     * console.log(object.a[0].b.c);
	     * // => 9
	     *
	     * _.update(object, 'x[0].y.z', function(n) { return n ? n + 1 : 0; });
	     * console.log(object.x[0].y.z);
	     * // => 0
	     */
	    function update(object, path, updater) {
	      return object == null ? object : baseUpdate(object, path, castFunction(updater));
	    }

	    /**
	     * This method is like `_.update` except that it accepts `customizer` which is
	     * invoked to produce the objects of `path`.  If `customizer` returns `undefined`
	     * path creation is handled by the method instead. The `customizer` is invoked
	     * with three arguments: (nsValue, key, nsObject).
	     *
	     * **Note:** This method mutates `object`.
	     *
	     * @static
	     * @memberOf _
	     * @since 4.6.0
	     * @category Object
	     * @param {Object} object The object to modify.
	     * @param {Array|string} path The path of the property to set.
	     * @param {Function} updater The function to produce the updated value.
	     * @param {Function} [customizer] The function to customize assigned values.
	     * @returns {Object} Returns `object`.
	     * @example
	     *
	     * var object = {};
	     *
	     * _.updateWith(object, '[0][1]', _.constant('a'), Object);
	     * // => { '0': { '1': 'a' } }
	     */
	    function updateWith(object, path, updater, customizer) {
	      customizer = typeof customizer == 'function' ? customizer : undefined;
	      return object == null ? object : baseUpdate(object, path, castFunction(updater), customizer);
	    }

	    /**
	     * Creates an array of the own enumerable string keyed property values of `object`.
	     *
	     * **Note:** Non-object values are coerced to objects.
	     *
	     * @static
	     * @since 0.1.0
	     * @memberOf _
	     * @category Object
	     * @param {Object} object The object to query.
	     * @returns {Array} Returns the array of property values.
	     * @example
	     *
	     * function Foo() {
	     *   this.a = 1;
	     *   this.b = 2;
	     * }
	     *
	     * Foo.prototype.c = 3;
	     *
	     * _.values(new Foo);
	     * // => [1, 2] (iteration order is not guaranteed)
	     *
	     * _.values('hi');
	     * // => ['h', 'i']
	     */
	    function values(object) {
	      return object ? baseValues(object, keys(object)) : [];
	    }

	    /**
	     * Creates an array of the own and inherited enumerable string keyed property
	     * values of `object`.
	     *
	     * **Note:** Non-object values are coerced to objects.
	     *
	     * @static
	     * @memberOf _
	     * @since 3.0.0
	     * @category Object
	     * @param {Object} object The object to query.
	     * @returns {Array} Returns the array of property values.
	     * @example
	     *
	     * function Foo() {
	     *   this.a = 1;
	     *   this.b = 2;
	     * }
	     *
	     * Foo.prototype.c = 3;
	     *
	     * _.valuesIn(new Foo);
	     * // => [1, 2, 3] (iteration order is not guaranteed)
	     */
	    function valuesIn(object) {
	      return object == null ? [] : baseValues(object, keysIn(object));
	    }

	    /*------------------------------------------------------------------------*/

	    /**
	     * Clamps `number` within the inclusive `lower` and `upper` bounds.
	     *
	     * @static
	     * @memberOf _
	     * @since 4.0.0
	     * @category Number
	     * @param {number} number The number to clamp.
	     * @param {number} [lower] The lower bound.
	     * @param {number} upper The upper bound.
	     * @returns {number} Returns the clamped number.
	     * @example
	     *
	     * _.clamp(-10, -5, 5);
	     * // => -5
	     *
	     * _.clamp(10, -5, 5);
	     * // => 5
	     */
	    function clamp(number, lower, upper) {
	      if (upper === undefined) {
	        upper = lower;
	        lower = undefined;
	      }
	      if (upper !== undefined) {
	        upper = toNumber(upper);
	        upper = upper === upper ? upper : 0;
	      }
	      if (lower !== undefined) {
	        lower = toNumber(lower);
	        lower = lower === lower ? lower : 0;
	      }
	      return baseClamp(toNumber(number), lower, upper);
	    }

	    /**
	     * Checks if `n` is between `start` and up to but not including, `end`. If
	     * `end` is not specified, it's set to `start` with `start` then set to `0`.
	     * If `start` is greater than `end` the params are swapped to support
	     * negative ranges.
	     *
	     * @static
	     * @memberOf _
	     * @since 3.3.0
	     * @category Number
	     * @param {number} number The number to check.
	     * @param {number} [start=0] The start of the range.
	     * @param {number} end The end of the range.
	     * @returns {boolean} Returns `true` if `number` is in the range, else `false`.
	     * @example
	     *
	     * _.inRange(3, 2, 4);
	     * // => true
	     *
	     * _.inRange(4, 8);
	     * // => true
	     *
	     * _.inRange(4, 2);
	     * // => false
	     *
	     * _.inRange(2, 2);
	     * // => false
	     *
	     * _.inRange(1.2, 2);
	     * // => true
	     *
	     * _.inRange(5.2, 4);
	     * // => false
	     *
	     * _.inRange(-3, -2, -6);
	     * // => true
	     */
	    function inRange(number, start, end) {
	      start = toNumber(start) || 0;
	      if (end === undefined) {
	        end = start;
	        start = 0;
	      } else {
	        end = toNumber(end) || 0;
	      }
	      number = toNumber(number);
	      return baseInRange(number, start, end);
	    }

	    /**
	     * Produces a random number between the inclusive `lower` and `upper` bounds.
	     * If only one argument is provided a number between `0` and the given number
	     * is returned. If `floating` is `true`, or either `lower` or `upper` are
	     * floats, a floating-point number is returned instead of an integer.
	     *
	     * **Note:** JavaScript follows the IEEE-754 standard for resolving
	     * floating-point values which can produce unexpected results.
	     *
	     * @static
	     * @memberOf _
	     * @since 0.7.0
	     * @category Number
	     * @param {number} [lower=0] The lower bound.
	     * @param {number} [upper=1] The upper bound.
	     * @param {boolean} [floating] Specify returning a floating-point number.
	     * @returns {number} Returns the random number.
	     * @example
	     *
	     * _.random(0, 5);
	     * // => an integer between 0 and 5
	     *
	     * _.random(5);
	     * // => also an integer between 0 and 5
	     *
	     * _.random(5, true);
	     * // => a floating-point number between 0 and 5
	     *
	     * _.random(1.2, 5.2);
	     * // => a floating-point number between 1.2 and 5.2
	     */
	    function random(lower, upper, floating) {
	      if (floating && typeof floating != 'boolean' && isIterateeCall(lower, upper, floating)) {
	        upper = floating = undefined;
	      }
	      if (floating === undefined) {
	        if (typeof upper == 'boolean') {
	          floating = upper;
	          upper = undefined;
	        }
	        else if (typeof lower == 'boolean') {
	          floating = lower;
	          lower = undefined;
	        }
	      }
	      if (lower === undefined && upper === undefined) {
	        lower = 0;
	        upper = 1;
	      }
	      else {
	        lower = toNumber(lower) || 0;
	        if (upper === undefined) {
	          upper = lower;
	          lower = 0;
	        } else {
	          upper = toNumber(upper) || 0;
	        }
	      }
	      if (lower > upper) {
	        var temp = lower;
	        lower = upper;
	        upper = temp;
	      }
	      if (floating || lower % 1 || upper % 1) {
	        var rand = nativeRandom();
	        return nativeMin(lower + (rand * (upper - lower + freeParseFloat('1e-' + ((rand + '').length - 1)))), upper);
	      }
	      return baseRandom(lower, upper);
	    }

	    /*------------------------------------------------------------------------*/

	    /**
	     * Converts `string` to [camel case](https://en.wikipedia.org/wiki/CamelCase).
	     *
	     * @static
	     * @memberOf _
	     * @since 3.0.0
	     * @category String
	     * @param {string} [string=''] The string to convert.
	     * @returns {string} Returns the camel cased string.
	     * @example
	     *
	     * _.camelCase('Foo Bar');
	     * // => 'fooBar'
	     *
	     * _.camelCase('--foo-bar--');
	     * // => 'fooBar'
	     *
	     * _.camelCase('__FOO_BAR__');
	     * // => 'fooBar'
	     */
	    var camelCase = createCompounder(function(result, word, index) {
	      word = word.toLowerCase();
	      return result + (index ? capitalize(word) : word);
	    });

	    /**
	     * Converts the first character of `string` to upper case and the remaining
	     * to lower case.
	     *
	     * @static
	     * @memberOf _
	     * @since 3.0.0
	     * @category String
	     * @param {string} [string=''] The string to capitalize.
	     * @returns {string} Returns the capitalized string.
	     * @example
	     *
	     * _.capitalize('FRED');
	     * // => 'Fred'
	     */
	    function capitalize(string) {
	      return upperFirst(toString(string).toLowerCase());
	    }

	    /**
	     * Deburrs `string` by converting
	     * [latin-1 supplementary letters](https://en.wikipedia.org/wiki/Latin-1_Supplement_(Unicode_block)#Character_table)
	     * to basic latin letters and removing
	     * [combining diacritical marks](https://en.wikipedia.org/wiki/Combining_Diacritical_Marks).
	     *
	     * @static
	     * @memberOf _
	     * @since 3.0.0
	     * @category String
	     * @param {string} [string=''] The string to deburr.
	     * @returns {string} Returns the deburred string.
	     * @example
	     *
	     * _.deburr('déjà vu');
	     * // => 'deja vu'
	     */
	    function deburr(string) {
	      string = toString(string);
	      return string && string.replace(reLatin1, deburrLetter).replace(reComboMark, '');
	    }

	    /**
	     * Checks if `string` ends with the given target string.
	     *
	     * @static
	     * @memberOf _
	     * @since 3.0.0
	     * @category String
	     * @param {string} [string=''] The string to search.
	     * @param {string} [target] The string to search for.
	     * @param {number} [position=string.length] The position to search from.
	     * @returns {boolean} Returns `true` if `string` ends with `target`,
	     *  else `false`.
	     * @example
	     *
	     * _.endsWith('abc', 'c');
	     * // => true
	     *
	     * _.endsWith('abc', 'b');
	     * // => false
	     *
	     * _.endsWith('abc', 'b', 2);
	     * // => true
	     */
	    function endsWith(string, target, position) {
	      string = toString(string);
	      target = typeof target == 'string' ? target : (target + '');

	      var length = string.length;
	      position = position === undefined
	        ? length
	        : baseClamp(toInteger(position), 0, length);

	      position -= target.length;
	      return position >= 0 && string.indexOf(target, position) == position;
	    }

	    /**
	     * Converts the characters "&", "<", ">", '"', "'", and "\`" in `string` to
	     * their corresponding HTML entities.
	     *
	     * **Note:** No other characters are escaped. To escape additional
	     * characters use a third-party library like [_he_](https://mths.be/he).
	     *
	     * Though the ">" character is escaped for symmetry, characters like
	     * ">" and "/" don't need escaping in HTML and have no special meaning
	     * unless they're part of a tag or unquoted attribute value. See
	     * [Mathias Bynens's article](https://mathiasbynens.be/notes/ambiguous-ampersands)
	     * (under "semi-related fun fact") for more details.
	     *
	     * Backticks are escaped because in IE < 9, they can break out of
	     * attribute values or HTML comments. See [#59](https://html5sec.org/#59),
	     * [#102](https://html5sec.org/#102), [#108](https://html5sec.org/#108), and
	     * [#133](https://html5sec.org/#133) of the
	     * [HTML5 Security Cheatsheet](https://html5sec.org/) for more details.
	     *
	     * When working with HTML you should always
	     * [quote attribute values](http://wonko.com/post/html-escaping) to reduce
	     * XSS vectors.
	     *
	     * @static
	     * @since 0.1.0
	     * @memberOf _
	     * @category String
	     * @param {string} [string=''] The string to escape.
	     * @returns {string} Returns the escaped string.
	     * @example
	     *
	     * _.escape('fred, barney, & pebbles');
	     * // => 'fred, barney, &amp; pebbles'
	     */
	    function escape(string) {
	      string = toString(string);
	      return (string && reHasUnescapedHtml.test(string))
	        ? string.replace(reUnescapedHtml, escapeHtmlChar)
	        : string;
	    }

	    /**
	     * Escapes the `RegExp` special characters "^", "$", "\", ".", "*", "+",
	     * "?", "(", ")", "[", "]", "{", "}", and "|" in `string`.
	     *
	     * @static
	     * @memberOf _
	     * @since 3.0.0
	     * @category String
	     * @param {string} [string=''] The string to escape.
	     * @returns {string} Returns the escaped string.
	     * @example
	     *
	     * _.escapeRegExp('[lodash](https://lodash.com/)');
	     * // => '\[lodash\]\(https://lodash\.com/\)'
	     */
	    function escapeRegExp(string) {
	      string = toString(string);
	      return (string && reHasRegExpChar.test(string))
	        ? string.replace(reRegExpChar, '\\$&')
	        : string;
	    }

	    /**
	     * Converts `string` to
	     * [kebab case](https://en.wikipedia.org/wiki/Letter_case#Special_case_styles).
	     *
	     * @static
	     * @memberOf _
	     * @since 3.0.0
	     * @category String
	     * @param {string} [string=''] The string to convert.
	     * @returns {string} Returns the kebab cased string.
	     * @example
	     *
	     * _.kebabCase('Foo Bar');
	     * // => 'foo-bar'
	     *
	     * _.kebabCase('fooBar');
	     * // => 'foo-bar'
	     *
	     * _.kebabCase('__FOO_BAR__');
	     * // => 'foo-bar'
	     */
	    var kebabCase = createCompounder(function(result, word, index) {
	      return result + (index ? '-' : '') + word.toLowerCase();
	    });

	    /**
	     * Converts `string`, as space separated words, to lower case.
	     *
	     * @static
	     * @memberOf _
	     * @since 4.0.0
	     * @category String
	     * @param {string} [string=''] The string to convert.
	     * @returns {string} Returns the lower cased string.
	     * @example
	     *
	     * _.lowerCase('--Foo-Bar--');
	     * // => 'foo bar'
	     *
	     * _.lowerCase('fooBar');
	     * // => 'foo bar'
	     *
	     * _.lowerCase('__FOO_BAR__');
	     * // => 'foo bar'
	     */
	    var lowerCase = createCompounder(function(result, word, index) {
	      return result + (index ? ' ' : '') + word.toLowerCase();
	    });

	    /**
	     * Converts the first character of `string` to lower case.
	     *
	     * @static
	     * @memberOf _
	     * @since 4.0.0
	     * @category String
	     * @param {string} [string=''] The string to convert.
	     * @returns {string} Returns the converted string.
	     * @example
	     *
	     * _.lowerFirst('Fred');
	     * // => 'fred'
	     *
	     * _.lowerFirst('FRED');
	     * // => 'fRED'
	     */
	    var lowerFirst = createCaseFirst('toLowerCase');

	    /**
	     * Pads `string` on the left and right sides if it's shorter than `length`.
	     * Padding characters are truncated if they can't be evenly divided by `length`.
	     *
	     * @static
	     * @memberOf _
	     * @since 3.0.0
	     * @category String
	     * @param {string} [string=''] The string to pad.
	     * @param {number} [length=0] The padding length.
	     * @param {string} [chars=' '] The string used as padding.
	     * @returns {string} Returns the padded string.
	     * @example
	     *
	     * _.pad('abc', 8);
	     * // => '  abc   '
	     *
	     * _.pad('abc', 8, '_-');
	     * // => '_-abc_-_'
	     *
	     * _.pad('abc', 3);
	     * // => 'abc'
	     */
	    function pad(string, length, chars) {
	      string = toString(string);
	      length = toInteger(length);

	      var strLength = length ? stringSize(string) : 0;
	      if (!length || strLength >= length) {
	        return string;
	      }
	      var mid = (length - strLength) / 2;
	      return (
	        createPadding(nativeFloor(mid), chars) +
	        string +
	        createPadding(nativeCeil(mid), chars)
	      );
	    }

	    /**
	     * Pads `string` on the right side if it's shorter than `length`. Padding
	     * characters are truncated if they exceed `length`.
	     *
	     * @static
	     * @memberOf _
	     * @since 4.0.0
	     * @category String
	     * @param {string} [string=''] The string to pad.
	     * @param {number} [length=0] The padding length.
	     * @param {string} [chars=' '] The string used as padding.
	     * @returns {string} Returns the padded string.
	     * @example
	     *
	     * _.padEnd('abc', 6);
	     * // => 'abc   '
	     *
	     * _.padEnd('abc', 6, '_-');
	     * // => 'abc_-_'
	     *
	     * _.padEnd('abc', 3);
	     * // => 'abc'
	     */
	    function padEnd(string, length, chars) {
	      string = toString(string);
	      length = toInteger(length);

	      var strLength = length ? stringSize(string) : 0;
	      return (length && strLength < length)
	        ? (string + createPadding(length - strLength, chars))
	        : string;
	    }

	    /**
	     * Pads `string` on the left side if it's shorter than `length`. Padding
	     * characters are truncated if they exceed `length`.
	     *
	     * @static
	     * @memberOf _
	     * @since 4.0.0
	     * @category String
	     * @param {string} [string=''] The string to pad.
	     * @param {number} [length=0] The padding length.
	     * @param {string} [chars=' '] The string used as padding.
	     * @returns {string} Returns the padded string.
	     * @example
	     *
	     * _.padStart('abc', 6);
	     * // => '   abc'
	     *
	     * _.padStart('abc', 6, '_-');
	     * // => '_-_abc'
	     *
	     * _.padStart('abc', 3);
	     * // => 'abc'
	     */
	    function padStart(string, length, chars) {
	      string = toString(string);
	      length = toInteger(length);

	      var strLength = length ? stringSize(string) : 0;
	      return (length && strLength < length)
	        ? (createPadding(length - strLength, chars) + string)
	        : string;
	    }

	    /**
	     * Converts `string` to an integer of the specified radix. If `radix` is
	     * `undefined` or `0`, a `radix` of `10` is used unless `value` is a
	     * hexadecimal, in which case a `radix` of `16` is used.
	     *
	     * **Note:** This method aligns with the
	     * [ES5 implementation](https://es5.github.io/#x15.1.2.2) of `parseInt`.
	     *
	     * @static
	     * @memberOf _
	     * @since 1.1.0
	     * @category String
	     * @param {string} string The string to convert.
	     * @param {number} [radix=10] The radix to interpret `value` by.
	     * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
	     * @returns {number} Returns the converted integer.
	     * @example
	     *
	     * _.parseInt('08');
	     * // => 8
	     *
	     * _.map(['6', '08', '10'], _.parseInt);
	     * // => [6, 8, 10]
	     */
	    function parseInt(string, radix, guard) {
	      // Chrome fails to trim leading <BOM> whitespace characters.
	      // See https://bugs.chromium.org/p/v8/issues/detail?id=3109 for more details.
	      if (guard || radix == null) {
	        radix = 0;
	      } else if (radix) {
	        radix = +radix;
	      }
	      string = toString(string).replace(reTrim, '');
	      return nativeParseInt(string, radix || (reHasHexPrefix.test(string) ? 16 : 10));
	    }

	    /**
	     * Repeats the given string `n` times.
	     *
	     * @static
	     * @memberOf _
	     * @since 3.0.0
	     * @category String
	     * @param {string} [string=''] The string to repeat.
	     * @param {number} [n=1] The number of times to repeat the string.
	     * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
	     * @returns {string} Returns the repeated string.
	     * @example
	     *
	     * _.repeat('*', 3);
	     * // => '***'
	     *
	     * _.repeat('abc', 2);
	     * // => 'abcabc'
	     *
	     * _.repeat('abc', 0);
	     * // => ''
	     */
	    function repeat(string, n, guard) {
	      if ((guard ? isIterateeCall(string, n, guard) : n === undefined)) {
	        n = 1;
	      } else {
	        n = toInteger(n);
	      }
	      return baseRepeat(toString(string), n);
	    }

	    /**
	     * Replaces matches for `pattern` in `string` with `replacement`.
	     *
	     * **Note:** This method is based on
	     * [`String#replace`](https://mdn.io/String/replace).
	     *
	     * @static
	     * @memberOf _
	     * @since 4.0.0
	     * @category String
	     * @param {string} [string=''] The string to modify.
	     * @param {RegExp|string} pattern The pattern to replace.
	     * @param {Function|string} replacement The match replacement.
	     * @returns {string} Returns the modified string.
	     * @example
	     *
	     * _.replace('Hi Fred', 'Fred', 'Barney');
	     * // => 'Hi Barney'
	     */
	    function replace() {
	      var args = arguments,
	          string = toString(args[0]);

	      return args.length < 3 ? string : nativeReplace.call(string, args[1], args[2]);
	    }

	    /**
	     * Converts `string` to
	     * [snake case](https://en.wikipedia.org/wiki/Snake_case).
	     *
	     * @static
	     * @memberOf _
	     * @since 3.0.0
	     * @category String
	     * @param {string} [string=''] The string to convert.
	     * @returns {string} Returns the snake cased string.
	     * @example
	     *
	     * _.snakeCase('Foo Bar');
	     * // => 'foo_bar'
	     *
	     * _.snakeCase('fooBar');
	     * // => 'foo_bar'
	     *
	     * _.snakeCase('--FOO-BAR--');
	     * // => 'foo_bar'
	     */
	    var snakeCase = createCompounder(function(result, word, index) {
	      return result + (index ? '_' : '') + word.toLowerCase();
	    });

	    /**
	     * Splits `string` by `separator`.
	     *
	     * **Note:** This method is based on
	     * [`String#split`](https://mdn.io/String/split).
	     *
	     * @static
	     * @memberOf _
	     * @since 4.0.0
	     * @category String
	     * @param {string} [string=''] The string to split.
	     * @param {RegExp|string} separator The separator pattern to split by.
	     * @param {number} [limit] The length to truncate results to.
	     * @returns {Array} Returns the new array of string segments.
	     * @example
	     *
	     * _.split('a-b-c', '-', 2);
	     * // => ['a', 'b']
	     */
	    function split(string, separator, limit) {
	      if (limit && typeof limit != 'number' && isIterateeCall(string, separator, limit)) {
	        separator = limit = undefined;
	      }
	      limit = limit === undefined ? MAX_ARRAY_LENGTH : limit >>> 0;
	      if (!limit) {
	        return [];
	      }
	      string = toString(string);
	      if (string && (
	            typeof separator == 'string' ||
	            (separator != null && !isRegExp(separator))
	          )) {
	        separator += '';
	        if (separator == '' && reHasComplexSymbol.test(string)) {
	          return castSlice(stringToArray(string), 0, limit);
	        }
	      }
	      return nativeSplit.call(string, separator, limit);
	    }

	    /**
	     * Converts `string` to
	     * [start case](https://en.wikipedia.org/wiki/Letter_case#Stylistic_or_specialised_usage).
	     *
	     * @static
	     * @memberOf _
	     * @since 3.1.0
	     * @category String
	     * @param {string} [string=''] The string to convert.
	     * @returns {string} Returns the start cased string.
	     * @example
	     *
	     * _.startCase('--foo-bar--');
	     * // => 'Foo Bar'
	     *
	     * _.startCase('fooBar');
	     * // => 'Foo Bar'
	     *
	     * _.startCase('__FOO_BAR__');
	     * // => 'FOO BAR'
	     */
	    var startCase = createCompounder(function(result, word, index) {
	      return result + (index ? ' ' : '') + upperFirst(word);
	    });

	    /**
	     * Checks if `string` starts with the given target string.
	     *
	     * @static
	     * @memberOf _
	     * @since 3.0.0
	     * @category String
	     * @param {string} [string=''] The string to search.
	     * @param {string} [target] The string to search for.
	     * @param {number} [position=0] The position to search from.
	     * @returns {boolean} Returns `true` if `string` starts with `target`,
	     *  else `false`.
	     * @example
	     *
	     * _.startsWith('abc', 'a');
	     * // => true
	     *
	     * _.startsWith('abc', 'b');
	     * // => false
	     *
	     * _.startsWith('abc', 'b', 1);
	     * // => true
	     */
	    function startsWith(string, target, position) {
	      string = toString(string);
	      position = baseClamp(toInteger(position), 0, string.length);
	      return string.lastIndexOf(target, position) == position;
	    }

	    /**
	     * Creates a compiled template function that can interpolate data properties
	     * in "interpolate" delimiters, HTML-escape interpolated data properties in
	     * "escape" delimiters, and execute JavaScript in "evaluate" delimiters. Data
	     * properties may be accessed as free variables in the template. If a setting
	     * object is given, it takes precedence over `_.templateSettings` values.
	     *
	     * **Note:** In the development build `_.template` utilizes
	     * [sourceURLs](http://www.html5rocks.com/en/tutorials/developertools/sourcemaps/#toc-sourceurl)
	     * for easier debugging.
	     *
	     * For more information on precompiling templates see
	     * [lodash's custom builds documentation](https://lodash.com/custom-builds).
	     *
	     * For more information on Chrome extension sandboxes see
	     * [Chrome's extensions documentation](https://developer.chrome.com/extensions/sandboxingEval).
	     *
	     * @static
	     * @since 0.1.0
	     * @memberOf _
	     * @category String
	     * @param {string} [string=''] The template string.
	     * @param {Object} [options={}] The options object.
	     * @param {RegExp} [options.escape=_.templateSettings.escape]
	     *  The HTML "escape" delimiter.
	     * @param {RegExp} [options.evaluate=_.templateSettings.evaluate]
	     *  The "evaluate" delimiter.
	     * @param {Object} [options.imports=_.templateSettings.imports]
	     *  An object to import into the template as free variables.
	     * @param {RegExp} [options.interpolate=_.templateSettings.interpolate]
	     *  The "interpolate" delimiter.
	     * @param {string} [options.sourceURL='lodash.templateSources[n]']
	     *  The sourceURL of the compiled template.
	     * @param {string} [options.variable='obj']
	     *  The data object variable name.
	     * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
	     * @returns {Function} Returns the compiled template function.
	     * @example
	     *
	     * // Use the "interpolate" delimiter to create a compiled template.
	     * var compiled = _.template('hello <%= user %>!');
	     * compiled({ 'user': 'fred' });
	     * // => 'hello fred!'
	     *
	     * // Use the HTML "escape" delimiter to escape data property values.
	     * var compiled = _.template('<b><%- value %></b>');
	     * compiled({ 'value': '<script>' });
	     * // => '<b>&lt;script&gt;</b>'
	     *
	     * // Use the "evaluate" delimiter to execute JavaScript and generate HTML.
	     * var compiled = _.template('<% _.forEach(users, function(user) { %><li><%- user %></li><% }); %>');
	     * compiled({ 'users': ['fred', 'barney'] });
	     * // => '<li>fred</li><li>barney</li>'
	     *
	     * // Use the internal `print` function in "evaluate" delimiters.
	     * var compiled = _.template('<% print("hello " + user); %>!');
	     * compiled({ 'user': 'barney' });
	     * // => 'hello barney!'
	     *
	     * // Use the ES delimiter as an alternative to the default "interpolate" delimiter.
	     * var compiled = _.template('hello ${ user }!');
	     * compiled({ 'user': 'pebbles' });
	     * // => 'hello pebbles!'
	     *
	     * // Use custom template delimiters.
	     * _.templateSettings.interpolate = /{{([\s\S]+?)}}/g;
	     * var compiled = _.template('hello {{ user }}!');
	     * compiled({ 'user': 'mustache' });
	     * // => 'hello mustache!'
	     *
	     * // Use backslashes to treat delimiters as plain text.
	     * var compiled = _.template('<%= "\\<%- value %\\>" %>');
	     * compiled({ 'value': 'ignored' });
	     * // => '<%- value %>'
	     *
	     * // Use the `imports` option to import `jQuery` as `jq`.
	     * var text = '<% jq.each(users, function(user) { %><li><%- user %></li><% }); %>';
	     * var compiled = _.template(text, { 'imports': { 'jq': jQuery } });
	     * compiled({ 'users': ['fred', 'barney'] });
	     * // => '<li>fred</li><li>barney</li>'
	     *
	     * // Use the `sourceURL` option to specify a custom sourceURL for the template.
	     * var compiled = _.template('hello <%= user %>!', { 'sourceURL': '/basic/greeting.jst' });
	     * compiled(data);
	     * // => Find the source of "greeting.jst" under the Sources tab or Resources panel of the web inspector.
	     *
	     * // Use the `variable` option to ensure a with-statement isn't used in the compiled template.
	     * var compiled = _.template('hi <%= data.user %>!', { 'variable': 'data' });
	     * compiled.source;
	     * // => function(data) {
	     * //   var __t, __p = '';
	     * //   __p += 'hi ' + ((__t = ( data.user )) == null ? '' : __t) + '!';
	     * //   return __p;
	     * // }
	     *
	     * // Use the `source` property to inline compiled templates for meaningful
	     * // line numbers in error messages and stack traces.
	     * fs.writeFileSync(path.join(cwd, 'jst.js'), '\
	     *   var JST = {\
	     *     "main": ' + _.template(mainText).source + '\
	     *   };\
	     * ');
	     */
	    function template(string, options, guard) {
	      // Based on John Resig's `tmpl` implementation
	      // (http://ejohn.org/blog/javascript-micro-templating/)
	      // and Laura Doktorova's doT.js (https://github.com/olado/doT).
	      var settings = lodash.templateSettings;

	      if (guard && isIterateeCall(string, options, guard)) {
	        options = undefined;
	      }
	      string = toString(string);
	      options = assignInWith({}, options, settings, assignInDefaults);

	      var imports = assignInWith({}, options.imports, settings.imports, assignInDefaults),
	          importsKeys = keys(imports),
	          importsValues = baseValues(imports, importsKeys);

	      var isEscaping,
	          isEvaluating,
	          index = 0,
	          interpolate = options.interpolate || reNoMatch,
	          source = "__p += '";

	      // Compile the regexp to match each delimiter.
	      var reDelimiters = RegExp(
	        (options.escape || reNoMatch).source + '|' +
	        interpolate.source + '|' +
	        (interpolate === reInterpolate ? reEsTemplate : reNoMatch).source + '|' +
	        (options.evaluate || reNoMatch).source + '|$'
	      , 'g');

	      // Use a sourceURL for easier debugging.
	      var sourceURL = '//# sourceURL=' +
	        ('sourceURL' in options
	          ? options.sourceURL
	          : ('lodash.templateSources[' + (++templateCounter) + ']')
	        ) + '\n';

	      string.replace(reDelimiters, function(match, escapeValue, interpolateValue, esTemplateValue, evaluateValue, offset) {
	        interpolateValue || (interpolateValue = esTemplateValue);

	        // Escape characters that can't be included in string literals.
	        source += string.slice(index, offset).replace(reUnescapedString, escapeStringChar);

	        // Replace delimiters with snippets.
	        if (escapeValue) {
	          isEscaping = true;
	          source += "' +\n__e(" + escapeValue + ") +\n'";
	        }
	        if (evaluateValue) {
	          isEvaluating = true;
	          source += "';\n" + evaluateValue + ";\n__p += '";
	        }
	        if (interpolateValue) {
	          source += "' +\n((__t = (" + interpolateValue + ")) == null ? '' : __t) +\n'";
	        }
	        index = offset + match.length;

	        // The JS engine embedded in Adobe products needs `match` returned in
	        // order to produce the correct `offset` value.
	        return match;
	      });

	      source += "';\n";

	      // If `variable` is not specified wrap a with-statement around the generated
	      // code to add the data object to the top of the scope chain.
	      var variable = options.variable;
	      if (!variable) {
	        source = 'with (obj) {\n' + source + '\n}\n';
	      }
	      // Cleanup code by stripping empty strings.
	      source = (isEvaluating ? source.replace(reEmptyStringLeading, '') : source)
	        .replace(reEmptyStringMiddle, '$1')
	        .replace(reEmptyStringTrailing, '$1;');

	      // Frame code as the function body.
	      source = 'function(' + (variable || 'obj') + ') {\n' +
	        (variable
	          ? ''
	          : 'obj || (obj = {});\n'
	        ) +
	        "var __t, __p = ''" +
	        (isEscaping
	           ? ', __e = _.escape'
	           : ''
	        ) +
	        (isEvaluating
	          ? ', __j = Array.prototype.join;\n' +
	            "function print() { __p += __j.call(arguments, '') }\n"
	          : ';\n'
	        ) +
	        source +
	        'return __p\n}';

	      var result = attempt(function() {
	        return Function(importsKeys, sourceURL + 'return ' + source)
	          .apply(undefined, importsValues);
	      });

	      // Provide the compiled function's source by its `toString` method or
	      // the `source` property as a convenience for inlining compiled templates.
	      result.source = source;
	      if (isError(result)) {
	        throw result;
	      }
	      return result;
	    }

	    /**
	     * Converts `string`, as a whole, to lower case just like
	     * [String#toLowerCase](https://mdn.io/toLowerCase).
	     *
	     * @static
	     * @memberOf _
	     * @since 4.0.0
	     * @category String
	     * @param {string} [string=''] The string to convert.
	     * @returns {string} Returns the lower cased string.
	     * @example
	     *
	     * _.toLower('--Foo-Bar--');
	     * // => '--foo-bar--'
	     *
	     * _.toLower('fooBar');
	     * // => 'foobar'
	     *
	     * _.toLower('__FOO_BAR__');
	     * // => '__foo_bar__'
	     */
	    function toLower(value) {
	      return toString(value).toLowerCase();
	    }

	    /**
	     * Converts `string`, as a whole, to upper case just like
	     * [String#toUpperCase](https://mdn.io/toUpperCase).
	     *
	     * @static
	     * @memberOf _
	     * @since 4.0.0
	     * @category String
	     * @param {string} [string=''] The string to convert.
	     * @returns {string} Returns the upper cased string.
	     * @example
	     *
	     * _.toUpper('--foo-bar--');
	     * // => '--FOO-BAR--'
	     *
	     * _.toUpper('fooBar');
	     * // => 'FOOBAR'
	     *
	     * _.toUpper('__foo_bar__');
	     * // => '__FOO_BAR__'
	     */
	    function toUpper(value) {
	      return toString(value).toUpperCase();
	    }

	    /**
	     * Removes leading and trailing whitespace or specified characters from `string`.
	     *
	     * @static
	     * @memberOf _
	     * @since 3.0.0
	     * @category String
	     * @param {string} [string=''] The string to trim.
	     * @param {string} [chars=whitespace] The characters to trim.
	     * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
	     * @returns {string} Returns the trimmed string.
	     * @example
	     *
	     * _.trim('  abc  ');
	     * // => 'abc'
	     *
	     * _.trim('-_-abc-_-', '_-');
	     * // => 'abc'
	     *
	     * _.map(['  foo  ', '  bar  '], _.trim);
	     * // => ['foo', 'bar']
	     */
	    function trim(string, chars, guard) {
	      string = toString(string);
	      if (!string) {
	        return string;
	      }
	      if (guard || chars === undefined) {
	        return string.replace(reTrim, '');
	      }
	      if (!(chars += '')) {
	        return string;
	      }
	      var strSymbols = stringToArray(string),
	          chrSymbols = stringToArray(chars),
	          start = charsStartIndex(strSymbols, chrSymbols),
	          end = charsEndIndex(strSymbols, chrSymbols) + 1;

	      return castSlice(strSymbols, start, end).join('');
	    }

	    /**
	     * Removes trailing whitespace or specified characters from `string`.
	     *
	     * @static
	     * @memberOf _
	     * @since 4.0.0
	     * @category String
	     * @param {string} [string=''] The string to trim.
	     * @param {string} [chars=whitespace] The characters to trim.
	     * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
	     * @returns {string} Returns the trimmed string.
	     * @example
	     *
	     * _.trimEnd('  abc  ');
	     * // => '  abc'
	     *
	     * _.trimEnd('-_-abc-_-', '_-');
	     * // => '-_-abc'
	     */
	    function trimEnd(string, chars, guard) {
	      string = toString(string);
	      if (!string) {
	        return string;
	      }
	      if (guard || chars === undefined) {
	        return string.replace(reTrimEnd, '');
	      }
	      if (!(chars += '')) {
	        return string;
	      }
	      var strSymbols = stringToArray(string),
	          end = charsEndIndex(strSymbols, stringToArray(chars)) + 1;

	      return castSlice(strSymbols, 0, end).join('');
	    }

	    /**
	     * Removes leading whitespace or specified characters from `string`.
	     *
	     * @static
	     * @memberOf _
	     * @since 4.0.0
	     * @category String
	     * @param {string} [string=''] The string to trim.
	     * @param {string} [chars=whitespace] The characters to trim.
	     * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
	     * @returns {string} Returns the trimmed string.
	     * @example
	     *
	     * _.trimStart('  abc  ');
	     * // => 'abc  '
	     *
	     * _.trimStart('-_-abc-_-', '_-');
	     * // => 'abc-_-'
	     */
	    function trimStart(string, chars, guard) {
	      string = toString(string);
	      if (!string) {
	        return string;
	      }
	      if (guard || chars === undefined) {
	        return string.replace(reTrimStart, '');
	      }
	      if (!(chars += '')) {
	        return string;
	      }
	      var strSymbols = stringToArray(string),
	          start = charsStartIndex(strSymbols, stringToArray(chars));

	      return castSlice(strSymbols, start).join('');
	    }

	    /**
	     * Truncates `string` if it's longer than the given maximum string length.
	     * The last characters of the truncated string are replaced with the omission
	     * string which defaults to "...".
	     *
	     * @static
	     * @memberOf _
	     * @since 4.0.0
	     * @category String
	     * @param {string} [string=''] The string to truncate.
	     * @param {Object} [options={}] The options object.
	     * @param {number} [options.length=30] The maximum string length.
	     * @param {string} [options.omission='...'] The string to indicate text is omitted.
	     * @param {RegExp|string} [options.separator] The separator pattern to truncate to.
	     * @returns {string} Returns the truncated string.
	     * @example
	     *
	     * _.truncate('hi-diddly-ho there, neighborino');
	     * // => 'hi-diddly-ho there, neighbo...'
	     *
	     * _.truncate('hi-diddly-ho there, neighborino', {
	     *   'length': 24,
	     *   'separator': ' '
	     * });
	     * // => 'hi-diddly-ho there,...'
	     *
	     * _.truncate('hi-diddly-ho there, neighborino', {
	     *   'length': 24,
	     *   'separator': /,? +/
	     * });
	     * // => 'hi-diddly-ho there...'
	     *
	     * _.truncate('hi-diddly-ho there, neighborino', {
	     *   'omission': ' [...]'
	     * });
	     * // => 'hi-diddly-ho there, neig [...]'
	     */
	    function truncate(string, options) {
	      var length = DEFAULT_TRUNC_LENGTH,
	          omission = DEFAULT_TRUNC_OMISSION;

	      if (isObject(options)) {
	        var separator = 'separator' in options ? options.separator : separator;
	        length = 'length' in options ? toInteger(options.length) : length;
	        omission = 'omission' in options ? toString(options.omission) : omission;
	      }
	      string = toString(string);

	      var strLength = string.length;
	      if (reHasComplexSymbol.test(string)) {
	        var strSymbols = stringToArray(string);
	        strLength = strSymbols.length;
	      }
	      if (length >= strLength) {
	        return string;
	      }
	      var end = length - stringSize(omission);
	      if (end < 1) {
	        return omission;
	      }
	      var result = strSymbols
	        ? castSlice(strSymbols, 0, end).join('')
	        : string.slice(0, end);

	      if (separator === undefined) {
	        return result + omission;
	      }
	      if (strSymbols) {
	        end += (result.length - end);
	      }
	      if (isRegExp(separator)) {
	        if (string.slice(end).search(separator)) {
	          var match,
	              substring = result;

	          if (!separator.global) {
	            separator = RegExp(separator.source, toString(reFlags.exec(separator)) + 'g');
	          }
	          separator.lastIndex = 0;
	          while ((match = separator.exec(substring))) {
	            var newEnd = match.index;
	          }
	          result = result.slice(0, newEnd === undefined ? end : newEnd);
	        }
	      } else if (string.indexOf(separator, end) != end) {
	        var index = result.lastIndexOf(separator);
	        if (index > -1) {
	          result = result.slice(0, index);
	        }
	      }
	      return result + omission;
	    }

	    /**
	     * The inverse of `_.escape`; this method converts the HTML entities
	     * `&amp;`, `&lt;`, `&gt;`, `&quot;`, `&#39;`, and `&#96;` in `string` to
	     * their corresponding characters.
	     *
	     * **Note:** No other HTML entities are unescaped. To unescape additional
	     * HTML entities use a third-party library like [_he_](https://mths.be/he).
	     *
	     * @static
	     * @memberOf _
	     * @since 0.6.0
	     * @category String
	     * @param {string} [string=''] The string to unescape.
	     * @returns {string} Returns the unescaped string.
	     * @example
	     *
	     * _.unescape('fred, barney, &amp; pebbles');
	     * // => 'fred, barney, & pebbles'
	     */
	    function unescape(string) {
	      string = toString(string);
	      return (string && reHasEscapedHtml.test(string))
	        ? string.replace(reEscapedHtml, unescapeHtmlChar)
	        : string;
	    }

	    /**
	     * Converts `string`, as space separated words, to upper case.
	     *
	     * @static
	     * @memberOf _
	     * @since 4.0.0
	     * @category String
	     * @param {string} [string=''] The string to convert.
	     * @returns {string} Returns the upper cased string.
	     * @example
	     *
	     * _.upperCase('--foo-bar');
	     * // => 'FOO BAR'
	     *
	     * _.upperCase('fooBar');
	     * // => 'FOO BAR'
	     *
	     * _.upperCase('__foo_bar__');
	     * // => 'FOO BAR'
	     */
	    var upperCase = createCompounder(function(result, word, index) {
	      return result + (index ? ' ' : '') + word.toUpperCase();
	    });

	    /**
	     * Converts the first character of `string` to upper case.
	     *
	     * @static
	     * @memberOf _
	     * @since 4.0.0
	     * @category String
	     * @param {string} [string=''] The string to convert.
	     * @returns {string} Returns the converted string.
	     * @example
	     *
	     * _.upperFirst('fred');
	     * // => 'Fred'
	     *
	     * _.upperFirst('FRED');
	     * // => 'FRED'
	     */
	    var upperFirst = createCaseFirst('toUpperCase');

	    /**
	     * Splits `string` into an array of its words.
	     *
	     * @static
	     * @memberOf _
	     * @since 3.0.0
	     * @category String
	     * @param {string} [string=''] The string to inspect.
	     * @param {RegExp|string} [pattern] The pattern to match words.
	     * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
	     * @returns {Array} Returns the words of `string`.
	     * @example
	     *
	     * _.words('fred, barney, & pebbles');
	     * // => ['fred', 'barney', 'pebbles']
	     *
	     * _.words('fred, barney, & pebbles', /[^, ]+/g);
	     * // => ['fred', 'barney', '&', 'pebbles']
	     */
	    function words(string, pattern, guard) {
	      string = toString(string);
	      pattern = guard ? undefined : pattern;

	      if (pattern === undefined) {
	        pattern = reHasComplexWord.test(string) ? reComplexWord : reBasicWord;
	      }
	      return string.match(pattern) || [];
	    }

	    /*------------------------------------------------------------------------*/

	    /**
	     * Attempts to invoke `func`, returning either the result or the caught error
	     * object. Any additional arguments are provided to `func` when it's invoked.
	     *
	     * @static
	     * @memberOf _
	     * @since 3.0.0
	     * @category Util
	     * @param {Function} func The function to attempt.
	     * @param {...*} [args] The arguments to invoke `func` with.
	     * @returns {*} Returns the `func` result or error object.
	     * @example
	     *
	     * // Avoid throwing errors for invalid selectors.
	     * var elements = _.attempt(function(selector) {
	     *   return document.querySelectorAll(selector);
	     * }, '>_>');
	     *
	     * if (_.isError(elements)) {
	     *   elements = [];
	     * }
	     */
	    var attempt = rest(function(func, args) {
	      try {
	        return apply(func, undefined, args);
	      } catch (e) {
	        return isError(e) ? e : new Error(e);
	      }
	    });

	    /**
	     * Binds methods of an object to the object itself, overwriting the existing
	     * method.
	     *
	     * **Note:** This method doesn't set the "length" property of bound functions.
	     *
	     * @static
	     * @since 0.1.0
	     * @memberOf _
	     * @category Util
	     * @param {Object} object The object to bind and assign the bound methods to.
	     * @param {...(string|string[])} methodNames The object method names to bind.
	     * @returns {Object} Returns `object`.
	     * @example
	     *
	     * var view = {
	     *   'label': 'docs',
	     *   'onClick': function() {
	     *     console.log('clicked ' + this.label);
	     *   }
	     * };
	     *
	     * _.bindAll(view, 'onClick');
	     * jQuery(element).on('click', view.onClick);
	     * // => Logs 'clicked docs' when clicked.
	     */
	    var bindAll = rest(function(object, methodNames) {
	      arrayEach(baseFlatten(methodNames, 1), function(key) {
	        object[key] = bind(object[key], object);
	      });
	      return object;
	    });

	    /**
	     * Creates a function that iterates over `pairs` and invokes the corresponding
	     * function of the first predicate to return truthy. The predicate-function
	     * pairs are invoked with the `this` binding and arguments of the created
	     * function.
	     *
	     * @static
	     * @memberOf _
	     * @since 4.0.0
	     * @category Util
	     * @param {Array} pairs The predicate-function pairs.
	     * @returns {Function} Returns the new function.
	     * @example
	     *
	     * var func = _.cond([
	     *   [_.matches({ 'a': 1 }),           _.constant('matches A')],
	     *   [_.conforms({ 'b': _.isNumber }), _.constant('matches B')],
	     *   [_.constant(true),                _.constant('no match')]
	     * ]);
	     *
	     * func({ 'a': 1, 'b': 2 });
	     * // => 'matches A'
	     *
	     * func({ 'a': 0, 'b': 1 });
	     * // => 'matches B'
	     *
	     * func({ 'a': '1', 'b': '2' });
	     * // => 'no match'
	     */
	    function cond(pairs) {
	      var length = pairs ? pairs.length : 0,
	          toIteratee = getIteratee();

	      pairs = !length ? [] : arrayMap(pairs, function(pair) {
	        if (typeof pair[1] != 'function') {
	          throw new TypeError(FUNC_ERROR_TEXT);
	        }
	        return [toIteratee(pair[0]), pair[1]];
	      });

	      return rest(function(args) {
	        var index = -1;
	        while (++index < length) {
	          var pair = pairs[index];
	          if (apply(pair[0], this, args)) {
	            return apply(pair[1], this, args);
	          }
	        }
	      });
	    }

	    /**
	     * Creates a function that invokes the predicate properties of `source` with
	     * the corresponding property values of a given object, returning `true` if
	     * all predicates return truthy, else `false`.
	     *
	     * @static
	     * @memberOf _
	     * @since 4.0.0
	     * @category Util
	     * @param {Object} source The object of property predicates to conform to.
	     * @returns {Function} Returns the new function.
	     * @example
	     *
	     * var users = [
	     *   { 'user': 'barney', 'age': 36 },
	     *   { 'user': 'fred',   'age': 40 }
	     * ];
	     *
	     * _.filter(users, _.conforms({ 'age': _.partial(_.gt, _, 38) }));
	     * // => [{ 'user': 'fred', 'age': 40 }]
	     */
	    function conforms(source) {
	      return baseConforms(baseClone(source, true));
	    }

	    /**
	     * Creates a function that returns `value`.
	     *
	     * @static
	     * @memberOf _
	     * @since 2.4.0
	     * @category Util
	     * @param {*} value The value to return from the new function.
	     * @returns {Function} Returns the new function.
	     * @example
	     *
	     * var object = { 'user': 'fred' };
	     * var getter = _.constant(object);
	     *
	     * getter() === object;
	     * // => true
	     */
	    function constant(value) {
	      return function() {
	        return value;
	      };
	    }

	    /**
	     * Creates a function that returns the result of invoking the given functions
	     * with the `this` binding of the created function, where each successive
	     * invocation is supplied the return value of the previous.
	     *
	     * @static
	     * @memberOf _
	     * @since 3.0.0
	     * @category Util
	     * @param {...(Function|Function[])} [funcs] Functions to invoke.
	     * @returns {Function} Returns the new function.
	     * @example
	     *
	     * function square(n) {
	     *   return n * n;
	     * }
	     *
	     * var addSquare = _.flow(_.add, square);
	     * addSquare(1, 2);
	     * // => 9
	     */
	    var flow = createFlow();

	    /**
	     * This method is like `_.flow` except that it creates a function that
	     * invokes the given functions from right to left.
	     *
	     * @static
	     * @since 0.1.0
	     * @memberOf _
	     * @category Util
	     * @param {...(Function|Function[])} [funcs] Functions to invoke.
	     * @returns {Function} Returns the new function.
	     * @example
	     *
	     * function square(n) {
	     *   return n * n;
	     * }
	     *
	     * var addSquare = _.flowRight(square, _.add);
	     * addSquare(1, 2);
	     * // => 9
	     */
	    var flowRight = createFlow(true);

	    /**
	     * This method returns the first argument given to it.
	     *
	     * @static
	     * @since 0.1.0
	     * @memberOf _
	     * @category Util
	     * @param {*} value Any value.
	     * @returns {*} Returns `value`.
	     * @example
	     *
	     * var object = { 'user': 'fred' };
	     *
	     * _.identity(object) === object;
	     * // => true
	     */
	    function identity(value) {
	      return value;
	    }

	    /**
	     * Creates a function that invokes `func` with the arguments of the created
	     * function. If `func` is a property name, the created function returns the
	     * property value for a given element. If `func` is an array or object, the
	     * created function returns `true` for elements that contain the equivalent
	     * source properties, otherwise it returns `false`.
	     *
	     * @static
	     * @since 4.0.0
	     * @memberOf _
	     * @category Util
	     * @param {*} [func=_.identity] The value to convert to a callback.
	     * @returns {Function} Returns the callback.
	     * @example
	     *
	     * var users = [
	     *   { 'user': 'barney', 'age': 36, 'active': true },
	     *   { 'user': 'fred',   'age': 40, 'active': false }
	     * ];
	     *
	     * // The `_.matches` iteratee shorthand.
	     * _.filter(users, _.iteratee({ 'user': 'barney', 'active': true }));
	     * // => [{ 'user': 'barney', 'age': 36, 'active': true }]
	     *
	     * // The `_.matchesProperty` iteratee shorthand.
	     * _.filter(users, _.iteratee(['user', 'fred']));
	     * // => [{ 'user': 'fred', 'age': 40 }]
	     *
	     * // The `_.property` iteratee shorthand.
	     * _.map(users, _.iteratee('user'));
	     * // => ['barney', 'fred']
	     *
	     * // Create custom iteratee shorthands.
	     * _.iteratee = _.wrap(_.iteratee, function(iteratee, func) {
	     *   return !_.isRegExp(func) ? iteratee(func) : function(string) {
	     *     return func.test(string);
	     *   };
	     * });
	     *
	     * _.filter(['abc', 'def'], /ef/);
	     * // => ['def']
	     */
	    function iteratee(func) {
	      return baseIteratee(typeof func == 'function' ? func : baseClone(func, true));
	    }

	    /**
	     * Creates a function that performs a partial deep comparison between a given
	     * object and `source`, returning `true` if the given object has equivalent
	     * property values, else `false`. The created function is equivalent to
	     * `_.isMatch` with a `source` partially applied.
	     *
	     * **Note:** This method supports comparing the same values as `_.isEqual`.
	     *
	     * @static
	     * @memberOf _
	     * @since 3.0.0
	     * @category Util
	     * @param {Object} source The object of property values to match.
	     * @returns {Function} Returns the new function.
	     * @example
	     *
	     * var users = [
	     *   { 'user': 'barney', 'age': 36, 'active': true },
	     *   { 'user': 'fred',   'age': 40, 'active': false }
	     * ];
	     *
	     * _.filter(users, _.matches({ 'age': 40, 'active': false }));
	     * // => [{ 'user': 'fred', 'age': 40, 'active': false }]
	     */
	    function matches(source) {
	      return baseMatches(baseClone(source, true));
	    }

	    /**
	     * Creates a function that performs a partial deep comparison between the
	     * value at `path` of a given object to `srcValue`, returning `true` if the
	     * object value is equivalent, else `false`.
	     *
	     * **Note:** This method supports comparing the same values as `_.isEqual`.
	     *
	     * @static
	     * @memberOf _
	     * @since 3.2.0
	     * @category Util
	     * @param {Array|string} path The path of the property to get.
	     * @param {*} srcValue The value to match.
	     * @returns {Function} Returns the new function.
	     * @example
	     *
	     * var users = [
	     *   { 'user': 'barney' },
	     *   { 'user': 'fred' }
	     * ];
	     *
	     * _.find(users, _.matchesProperty('user', 'fred'));
	     * // => { 'user': 'fred' }
	     */
	    function matchesProperty(path, srcValue) {
	      return baseMatchesProperty(path, baseClone(srcValue, true));
	    }

	    /**
	     * Creates a function that invokes the method at `path` of a given object.
	     * Any additional arguments are provided to the invoked method.
	     *
	     * @static
	     * @memberOf _
	     * @since 3.7.0
	     * @category Util
	     * @param {Array|string} path The path of the method to invoke.
	     * @param {...*} [args] The arguments to invoke the method with.
	     * @returns {Function} Returns the new function.
	     * @example
	     *
	     * var objects = [
	     *   { 'a': { 'b': _.constant(2) } },
	     *   { 'a': { 'b': _.constant(1) } }
	     * ];
	     *
	     * _.map(objects, _.method('a.b'));
	     * // => [2, 1]
	     *
	     * _.map(objects, _.method(['a', 'b']));
	     * // => [2, 1]
	     */
	    var method = rest(function(path, args) {
	      return function(object) {
	        return baseInvoke(object, path, args);
	      };
	    });

	    /**
	     * The opposite of `_.method`; this method creates a function that invokes
	     * the method at a given path of `object`. Any additional arguments are
	     * provided to the invoked method.
	     *
	     * @static
	     * @memberOf _
	     * @since 3.7.0
	     * @category Util
	     * @param {Object} object The object to query.
	     * @param {...*} [args] The arguments to invoke the method with.
	     * @returns {Function} Returns the new function.
	     * @example
	     *
	     * var array = _.times(3, _.constant),
	     *     object = { 'a': array, 'b': array, 'c': array };
	     *
	     * _.map(['a[2]', 'c[0]'], _.methodOf(object));
	     * // => [2, 0]
	     *
	     * _.map([['a', '2'], ['c', '0']], _.methodOf(object));
	     * // => [2, 0]
	     */
	    var methodOf = rest(function(object, args) {
	      return function(path) {
	        return baseInvoke(object, path, args);
	      };
	    });

	    /**
	     * Adds all own enumerable string keyed function properties of a source
	     * object to the destination object. If `object` is a function, then methods
	     * are added to its prototype as well.
	     *
	     * **Note:** Use `_.runInContext` to create a pristine `lodash` function to
	     * avoid conflicts caused by modifying the original.
	     *
	     * @static
	     * @since 0.1.0
	     * @memberOf _
	     * @category Util
	     * @param {Function|Object} [object=lodash] The destination object.
	     * @param {Object} source The object of functions to add.
	     * @param {Object} [options={}] The options object.
	     * @param {boolean} [options.chain=true] Specify whether mixins are chainable.
	     * @returns {Function|Object} Returns `object`.
	     * @example
	     *
	     * function vowels(string) {
	     *   return _.filter(string, function(v) {
	     *     return /[aeiou]/i.test(v);
	     *   });
	     * }
	     *
	     * _.mixin({ 'vowels': vowels });
	     * _.vowels('fred');
	     * // => ['e']
	     *
	     * _('fred').vowels().value();
	     * // => ['e']
	     *
	     * _.mixin({ 'vowels': vowels }, { 'chain': false });
	     * _('fred').vowels();
	     * // => ['e']
	     */
	    function mixin(object, source, options) {
	      var props = keys(source),
	          methodNames = baseFunctions(source, props);

	      if (options == null &&
	          !(isObject(source) && (methodNames.length || !props.length))) {
	        options = source;
	        source = object;
	        object = this;
	        methodNames = baseFunctions(source, keys(source));
	      }
	      var chain = !(isObject(options) && 'chain' in options) || !!options.chain,
	          isFunc = isFunction(object);

	      arrayEach(methodNames, function(methodName) {
	        var func = source[methodName];
	        object[methodName] = func;
	        if (isFunc) {
	          object.prototype[methodName] = function() {
	            var chainAll = this.__chain__;
	            if (chain || chainAll) {
	              var result = object(this.__wrapped__),
	                  actions = result.__actions__ = copyArray(this.__actions__);

	              actions.push({ 'func': func, 'args': arguments, 'thisArg': object });
	              result.__chain__ = chainAll;
	              return result;
	            }
	            return func.apply(object, arrayPush([this.value()], arguments));
	          };
	        }
	      });

	      return object;
	    }

	    /**
	     * Reverts the `_` variable to its previous value and returns a reference to
	     * the `lodash` function.
	     *
	     * @static
	     * @since 0.1.0
	     * @memberOf _
	     * @category Util
	     * @returns {Function} Returns the `lodash` function.
	     * @example
	     *
	     * var lodash = _.noConflict();
	     */
	    function noConflict() {
	      if (root._ === this) {
	        root._ = oldDash;
	      }
	      return this;
	    }

	    /**
	     * A no-operation function that returns `undefined` regardless of the
	     * arguments it receives.
	     *
	     * @static
	     * @memberOf _
	     * @since 2.3.0
	     * @category Util
	     * @example
	     *
	     * var object = { 'user': 'fred' };
	     *
	     * _.noop(object) === undefined;
	     * // => true
	     */
	    function noop() {
	      // No operation performed.
	    }

	    /**
	     * Creates a function that returns its nth argument. If `n` is negative,
	     * the nth argument from the end is returned.
	     *
	     * @static
	     * @memberOf _
	     * @since 4.0.0
	     * @category Util
	     * @param {number} [n=0] The index of the argument to return.
	     * @returns {Function} Returns the new function.
	     * @example
	     *
	     * var func = _.nthArg(1);
	     * func('a', 'b', 'c', 'd');
	     * // => 'b'
	     *
	     * var func = _.nthArg(-2);
	     * func('a', 'b', 'c', 'd');
	     * // => 'c'
	     */
	    function nthArg(n) {
	      n = toInteger(n);
	      return rest(function(args) {
	        return baseNth(args, n);
	      });
	    }

	    /**
	     * Creates a function that invokes `iteratees` with the arguments it receives
	     * and returns their results.
	     *
	     * @static
	     * @memberOf _
	     * @since 4.0.0
	     * @category Util
	     * @param {...(Array|Array[]|Function|Function[]|Object|Object[]|string|string[])}
	     *  [iteratees=[_.identity]] The iteratees to invoke.
	     * @returns {Function} Returns the new function.
	     * @example
	     *
	     * var func = _.over(Math.max, Math.min);
	     *
	     * func(1, 2, 3, 4);
	     * // => [4, 1]
	     */
	    var over = createOver(arrayMap);

	    /**
	     * Creates a function that checks if **all** of the `predicates` return
	     * truthy when invoked with the arguments it receives.
	     *
	     * @static
	     * @memberOf _
	     * @since 4.0.0
	     * @category Util
	     * @param {...(Array|Array[]|Function|Function[]|Object|Object[]|string|string[])}
	     *  [predicates=[_.identity]] The predicates to check.
	     * @returns {Function} Returns the new function.
	     * @example
	     *
	     * var func = _.overEvery(Boolean, isFinite);
	     *
	     * func('1');
	     * // => true
	     *
	     * func(null);
	     * // => false
	     *
	     * func(NaN);
	     * // => false
	     */
	    var overEvery = createOver(arrayEvery);

	    /**
	     * Creates a function that checks if **any** of the `predicates` return
	     * truthy when invoked with the arguments it receives.
	     *
	     * @static
	     * @memberOf _
	     * @since 4.0.0
	     * @category Util
	     * @param {...(Array|Array[]|Function|Function[]|Object|Object[]|string|string[])}
	     *  [predicates=[_.identity]] The predicates to check.
	     * @returns {Function} Returns the new function.
	     * @example
	     *
	     * var func = _.overSome(Boolean, isFinite);
	     *
	     * func('1');
	     * // => true
	     *
	     * func(null);
	     * // => true
	     *
	     * func(NaN);
	     * // => false
	     */
	    var overSome = createOver(arraySome);

	    /**
	     * Creates a function that returns the value at `path` of a given object.
	     *
	     * @static
	     * @memberOf _
	     * @since 2.4.0
	     * @category Util
	     * @param {Array|string} path The path of the property to get.
	     * @returns {Function} Returns the new function.
	     * @example
	     *
	     * var objects = [
	     *   { 'a': { 'b': 2 } },
	     *   { 'a': { 'b': 1 } }
	     * ];
	     *
	     * _.map(objects, _.property('a.b'));
	     * // => [2, 1]
	     *
	     * _.map(_.sortBy(objects, _.property(['a', 'b'])), 'a.b');
	     * // => [1, 2]
	     */
	    function property(path) {
	      return isKey(path) ? baseProperty(path) : basePropertyDeep(path);
	    }

	    /**
	     * The opposite of `_.property`; this method creates a function that returns
	     * the value at a given path of `object`.
	     *
	     * @static
	     * @memberOf _
	     * @since 3.0.0
	     * @category Util
	     * @param {Object} object The object to query.
	     * @returns {Function} Returns the new function.
	     * @example
	     *
	     * var array = [0, 1, 2],
	     *     object = { 'a': array, 'b': array, 'c': array };
	     *
	     * _.map(['a[2]', 'c[0]'], _.propertyOf(object));
	     * // => [2, 0]
	     *
	     * _.map([['a', '2'], ['c', '0']], _.propertyOf(object));
	     * // => [2, 0]
	     */
	    function propertyOf(object) {
	      return function(path) {
	        return object == null ? undefined : baseGet(object, path);
	      };
	    }

	    /**
	     * Creates an array of numbers (positive and/or negative) progressing from
	     * `start` up to, but not including, `end`. A step of `-1` is used if a negative
	     * `start` is specified without an `end` or `step`. If `end` is not specified,
	     * it's set to `start` with `start` then set to `0`.
	     *
	     * **Note:** JavaScript follows the IEEE-754 standard for resolving
	     * floating-point values which can produce unexpected results.
	     *
	     * @static
	     * @since 0.1.0
	     * @memberOf _
	     * @category Util
	     * @param {number} [start=0] The start of the range.
	     * @param {number} end The end of the range.
	     * @param {number} [step=1] The value to increment or decrement by.
	     * @returns {Array} Returns the new array of numbers.
	     * @example
	     *
	     * _.range(4);
	     * // => [0, 1, 2, 3]
	     *
	     * _.range(-4);
	     * // => [0, -1, -2, -3]
	     *
	     * _.range(1, 5);
	     * // => [1, 2, 3, 4]
	     *
	     * _.range(0, 20, 5);
	     * // => [0, 5, 10, 15]
	     *
	     * _.range(0, -4, -1);
	     * // => [0, -1, -2, -3]
	     *
	     * _.range(1, 4, 0);
	     * // => [1, 1, 1]
	     *
	     * _.range(0);
	     * // => []
	     */
	    var range = createRange();

	    /**
	     * This method is like `_.range` except that it populates values in
	     * descending order.
	     *
	     * @static
	     * @memberOf _
	     * @since 4.0.0
	     * @category Util
	     * @param {number} [start=0] The start of the range.
	     * @param {number} end The end of the range.
	     * @param {number} [step=1] The value to increment or decrement by.
	     * @returns {Array} Returns the new array of numbers.
	     * @example
	     *
	     * _.rangeRight(4);
	     * // => [3, 2, 1, 0]
	     *
	     * _.rangeRight(-4);
	     * // => [-3, -2, -1, 0]
	     *
	     * _.rangeRight(1, 5);
	     * // => [4, 3, 2, 1]
	     *
	     * _.rangeRight(0, 20, 5);
	     * // => [15, 10, 5, 0]
	     *
	     * _.rangeRight(0, -4, -1);
	     * // => [-3, -2, -1, 0]
	     *
	     * _.rangeRight(1, 4, 0);
	     * // => [1, 1, 1]
	     *
	     * _.rangeRight(0);
	     * // => []
	     */
	    var rangeRight = createRange(true);

	    /**
	     * Invokes the iteratee `n` times, returning an array of the results of
	     * each invocation. The iteratee is invoked with one argument; (index).
	     *
	     * @static
	     * @since 0.1.0
	     * @memberOf _
	     * @category Util
	     * @param {number} n The number of times to invoke `iteratee`.
	     * @param {Function} [iteratee=_.identity] The function invoked per iteration.
	     * @returns {Array} Returns the array of results.
	     * @example
	     *
	     * _.times(3, String);
	     * // => ['0', '1', '2']
	     *
	     *  _.times(4, _.constant(true));
	     * // => [true, true, true, true]
	     */
	    function times(n, iteratee) {
	      n = toInteger(n);
	      if (n < 1 || n > MAX_SAFE_INTEGER) {
	        return [];
	      }
	      var index = MAX_ARRAY_LENGTH,
	          length = nativeMin(n, MAX_ARRAY_LENGTH);

	      iteratee = getIteratee(iteratee);
	      n -= MAX_ARRAY_LENGTH;

	      var result = baseTimes(length, iteratee);
	      while (++index < n) {
	        iteratee(index);
	      }
	      return result;
	    }

	    /**
	     * Converts `value` to a property path array.
	     *
	     * @static
	     * @memberOf _
	     * @since 4.0.0
	     * @category Util
	     * @param {*} value The value to convert.
	     * @returns {Array} Returns the new property path array.
	     * @example
	     *
	     * _.toPath('a.b.c');
	     * // => ['a', 'b', 'c']
	     *
	     * _.toPath('a[0].b.c');
	     * // => ['a', '0', 'b', 'c']
	     *
	     * var path = ['a', 'b', 'c'],
	     *     newPath = _.toPath(path);
	     *
	     * console.log(newPath);
	     * // => ['a', 'b', 'c']
	     *
	     * console.log(path === newPath);
	     * // => false
	     */
	    function toPath(value) {
	      if (isArray(value)) {
	        return arrayMap(value, toKey);
	      }
	      return isSymbol(value) ? [value] : copyArray(stringToPath(value));
	    }

	    /**
	     * Generates a unique ID. If `prefix` is given, the ID is appended to it.
	     *
	     * @static
	     * @since 0.1.0
	     * @memberOf _
	     * @category Util
	     * @param {string} [prefix=''] The value to prefix the ID with.
	     * @returns {string} Returns the unique ID.
	     * @example
	     *
	     * _.uniqueId('contact_');
	     * // => 'contact_104'
	     *
	     * _.uniqueId();
	     * // => '105'
	     */
	    function uniqueId(prefix) {
	      var id = ++idCounter;
	      return toString(prefix) + id;
	    }

	    /*------------------------------------------------------------------------*/

	    /**
	     * Adds two numbers.
	     *
	     * @static
	     * @memberOf _
	     * @since 3.4.0
	     * @category Math
	     * @param {number} augend The first number in an addition.
	     * @param {number} addend The second number in an addition.
	     * @returns {number} Returns the total.
	     * @example
	     *
	     * _.add(6, 4);
	     * // => 10
	     */
	    var add = createMathOperation(function(augend, addend) {
	      return augend + addend;
	    });

	    /**
	     * Computes `number` rounded up to `precision`.
	     *
	     * @static
	     * @memberOf _
	     * @since 3.10.0
	     * @category Math
	     * @param {number} number The number to round up.
	     * @param {number} [precision=0] The precision to round up to.
	     * @returns {number} Returns the rounded up number.
	     * @example
	     *
	     * _.ceil(4.006);
	     * // => 5
	     *
	     * _.ceil(6.004, 2);
	     * // => 6.01
	     *
	     * _.ceil(6040, -2);
	     * // => 6100
	     */
	    var ceil = createRound('ceil');

	    /**
	     * Divide two numbers.
	     *
	     * @static
	     * @memberOf _
	     * @since 4.7.0
	     * @category Math
	     * @param {number} dividend The first number in a division.
	     * @param {number} divisor The second number in a division.
	     * @returns {number} Returns the quotient.
	     * @example
	     *
	     * _.divide(6, 4);
	     * // => 1.5
	     */
	    var divide = createMathOperation(function(dividend, divisor) {
	      return dividend / divisor;
	    });

	    /**
	     * Computes `number` rounded down to `precision`.
	     *
	     * @static
	     * @memberOf _
	     * @since 3.10.0
	     * @category Math
	     * @param {number} number The number to round down.
	     * @param {number} [precision=0] The precision to round down to.
	     * @returns {number} Returns the rounded down number.
	     * @example
	     *
	     * _.floor(4.006);
	     * // => 4
	     *
	     * _.floor(0.046, 2);
	     * // => 0.04
	     *
	     * _.floor(4060, -2);
	     * // => 4000
	     */
	    var floor = createRound('floor');

	    /**
	     * Computes the maximum value of `array`. If `array` is empty or falsey,
	     * `undefined` is returned.
	     *
	     * @static
	     * @since 0.1.0
	     * @memberOf _
	     * @category Math
	     * @param {Array} array The array to iterate over.
	     * @returns {*} Returns the maximum value.
	     * @example
	     *
	     * _.max([4, 2, 8, 6]);
	     * // => 8
	     *
	     * _.max([]);
	     * // => undefined
	     */
	    function max(array) {
	      return (array && array.length)
	        ? baseExtremum(array, identity, gt)
	        : undefined;
	    }

	    /**
	     * This method is like `_.max` except that it accepts `iteratee` which is
	     * invoked for each element in `array` to generate the criterion by which
	     * the value is ranked. The iteratee is invoked with one argument: (value).
	     *
	     * @static
	     * @memberOf _
	     * @since 4.0.0
	     * @category Math
	     * @param {Array} array The array to iterate over.
	     * @param {Array|Function|Object|string} [iteratee=_.identity]
	     *  The iteratee invoked per element.
	     * @returns {*} Returns the maximum value.
	     * @example
	     *
	     * var objects = [{ 'n': 1 }, { 'n': 2 }];
	     *
	     * _.maxBy(objects, function(o) { return o.n; });
	     * // => { 'n': 2 }
	     *
	     * // The `_.property` iteratee shorthand.
	     * _.maxBy(objects, 'n');
	     * // => { 'n': 2 }
	     */
	    function maxBy(array, iteratee) {
	      return (array && array.length)
	        ? baseExtremum(array, getIteratee(iteratee), gt)
	        : undefined;
	    }

	    /**
	     * Computes the mean of the values in `array`.
	     *
	     * @static
	     * @memberOf _
	     * @since 4.0.0
	     * @category Math
	     * @param {Array} array The array to iterate over.
	     * @returns {number} Returns the mean.
	     * @example
	     *
	     * _.mean([4, 2, 8, 6]);
	     * // => 5
	     */
	    function mean(array) {
	      return baseMean(array, identity);
	    }

	    /**
	     * This method is like `_.mean` except that it accepts `iteratee` which is
	     * invoked for each element in `array` to generate the value to be averaged.
	     * The iteratee is invoked with one argument: (value).
	     *
	     * @static
	     * @memberOf _
	     * @since 4.7.0
	     * @category Math
	     * @param {Array} array The array to iterate over.
	     * @param {Array|Function|Object|string} [iteratee=_.identity]
	     *  The iteratee invoked per element.
	     * @returns {number} Returns the mean.
	     * @example
	     *
	     * var objects = [{ 'n': 4 }, { 'n': 2 }, { 'n': 8 }, { 'n': 6 }];
	     *
	     * _.meanBy(objects, function(o) { return o.n; });
	     * // => 5
	     *
	     * // The `_.property` iteratee shorthand.
	     * _.meanBy(objects, 'n');
	     * // => 5
	     */
	    function meanBy(array, iteratee) {
	      return baseMean(array, getIteratee(iteratee));
	    }

	    /**
	     * Computes the minimum value of `array`. If `array` is empty or falsey,
	     * `undefined` is returned.
	     *
	     * @static
	     * @since 0.1.0
	     * @memberOf _
	     * @category Math
	     * @param {Array} array The array to iterate over.
	     * @returns {*} Returns the minimum value.
	     * @example
	     *
	     * _.min([4, 2, 8, 6]);
	     * // => 2
	     *
	     * _.min([]);
	     * // => undefined
	     */
	    function min(array) {
	      return (array && array.length)
	        ? baseExtremum(array, identity, lt)
	        : undefined;
	    }

	    /**
	     * This method is like `_.min` except that it accepts `iteratee` which is
	     * invoked for each element in `array` to generate the criterion by which
	     * the value is ranked. The iteratee is invoked with one argument: (value).
	     *
	     * @static
	     * @memberOf _
	     * @since 4.0.0
	     * @category Math
	     * @param {Array} array The array to iterate over.
	     * @param {Array|Function|Object|string} [iteratee=_.identity]
	     *  The iteratee invoked per element.
	     * @returns {*} Returns the minimum value.
	     * @example
	     *
	     * var objects = [{ 'n': 1 }, { 'n': 2 }];
	     *
	     * _.minBy(objects, function(o) { return o.n; });
	     * // => { 'n': 1 }
	     *
	     * // The `_.property` iteratee shorthand.
	     * _.minBy(objects, 'n');
	     * // => { 'n': 1 }
	     */
	    function minBy(array, iteratee) {
	      return (array && array.length)
	        ? baseExtremum(array, getIteratee(iteratee), lt)
	        : undefined;
	    }

	    /**
	     * Multiply two numbers.
	     *
	     * @static
	     * @memberOf _
	     * @since 4.7.0
	     * @category Math
	     * @param {number} multiplier The first number in a multiplication.
	     * @param {number} multiplicand The second number in a multiplication.
	     * @returns {number} Returns the product.
	     * @example
	     *
	     * _.multiply(6, 4);
	     * // => 24
	     */
	    var multiply = createMathOperation(function(multiplier, multiplicand) {
	      return multiplier * multiplicand;
	    });

	    /**
	     * Computes `number` rounded to `precision`.
	     *
	     * @static
	     * @memberOf _
	     * @since 3.10.0
	     * @category Math
	     * @param {number} number The number to round.
	     * @param {number} [precision=0] The precision to round to.
	     * @returns {number} Returns the rounded number.
	     * @example
	     *
	     * _.round(4.006);
	     * // => 4
	     *
	     * _.round(4.006, 2);
	     * // => 4.01
	     *
	     * _.round(4060, -2);
	     * // => 4100
	     */
	    var round = createRound('round');

	    /**
	     * Subtract two numbers.
	     *
	     * @static
	     * @memberOf _
	     * @since 4.0.0
	     * @category Math
	     * @param {number} minuend The first number in a subtraction.
	     * @param {number} subtrahend The second number in a subtraction.
	     * @returns {number} Returns the difference.
	     * @example
	     *
	     * _.subtract(6, 4);
	     * // => 2
	     */
	    var subtract = createMathOperation(function(minuend, subtrahend) {
	      return minuend - subtrahend;
	    });

	    /**
	     * Computes the sum of the values in `array`.
	     *
	     * @static
	     * @memberOf _
	     * @since 3.4.0
	     * @category Math
	     * @param {Array} array The array to iterate over.
	     * @returns {number} Returns the sum.
	     * @example
	     *
	     * _.sum([4, 2, 8, 6]);
	     * // => 20
	     */
	    function sum(array) {
	      return (array && array.length)
	        ? baseSum(array, identity)
	        : 0;
	    }

	    /**
	     * This method is like `_.sum` except that it accepts `iteratee` which is
	     * invoked for each element in `array` to generate the value to be summed.
	     * The iteratee is invoked with one argument: (value).
	     *
	     * @static
	     * @memberOf _
	     * @since 4.0.0
	     * @category Math
	     * @param {Array} array The array to iterate over.
	     * @param {Array|Function|Object|string} [iteratee=_.identity]
	     *  The iteratee invoked per element.
	     * @returns {number} Returns the sum.
	     * @example
	     *
	     * var objects = [{ 'n': 4 }, { 'n': 2 }, { 'n': 8 }, { 'n': 6 }];
	     *
	     * _.sumBy(objects, function(o) { return o.n; });
	     * // => 20
	     *
	     * // The `_.property` iteratee shorthand.
	     * _.sumBy(objects, 'n');
	     * // => 20
	     */
	    function sumBy(array, iteratee) {
	      return (array && array.length)
	        ? baseSum(array, getIteratee(iteratee))
	        : 0;
	    }

	    /*------------------------------------------------------------------------*/

	    // Add methods that return wrapped values in chain sequences.
	    lodash.after = after;
	    lodash.ary = ary;
	    lodash.assign = assign;
	    lodash.assignIn = assignIn;
	    lodash.assignInWith = assignInWith;
	    lodash.assignWith = assignWith;
	    lodash.at = at;
	    lodash.before = before;
	    lodash.bind = bind;
	    lodash.bindAll = bindAll;
	    lodash.bindKey = bindKey;
	    lodash.castArray = castArray;
	    lodash.chain = chain;
	    lodash.chunk = chunk;
	    lodash.compact = compact;
	    lodash.concat = concat;
	    lodash.cond = cond;
	    lodash.conforms = conforms;
	    lodash.constant = constant;
	    lodash.countBy = countBy;
	    lodash.create = create;
	    lodash.curry = curry;
	    lodash.curryRight = curryRight;
	    lodash.debounce = debounce;
	    lodash.defaults = defaults;
	    lodash.defaultsDeep = defaultsDeep;
	    lodash.defer = defer;
	    lodash.delay = delay;
	    lodash.difference = difference;
	    lodash.differenceBy = differenceBy;
	    lodash.differenceWith = differenceWith;
	    lodash.drop = drop;
	    lodash.dropRight = dropRight;
	    lodash.dropRightWhile = dropRightWhile;
	    lodash.dropWhile = dropWhile;
	    lodash.fill = fill;
	    lodash.filter = filter;
	    lodash.flatMap = flatMap;
	    lodash.flatMapDeep = flatMapDeep;
	    lodash.flatMapDepth = flatMapDepth;
	    lodash.flatten = flatten;
	    lodash.flattenDeep = flattenDeep;
	    lodash.flattenDepth = flattenDepth;
	    lodash.flip = flip;
	    lodash.flow = flow;
	    lodash.flowRight = flowRight;
	    lodash.fromPairs = fromPairs;
	    lodash.functions = functions;
	    lodash.functionsIn = functionsIn;
	    lodash.groupBy = groupBy;
	    lodash.initial = initial;
	    lodash.intersection = intersection;
	    lodash.intersectionBy = intersectionBy;
	    lodash.intersectionWith = intersectionWith;
	    lodash.invert = invert;
	    lodash.invertBy = invertBy;
	    lodash.invokeMap = invokeMap;
	    lodash.iteratee = iteratee;
	    lodash.keyBy = keyBy;
	    lodash.keys = keys;
	    lodash.keysIn = keysIn;
	    lodash.map = map;
	    lodash.mapKeys = mapKeys;
	    lodash.mapValues = mapValues;
	    lodash.matches = matches;
	    lodash.matchesProperty = matchesProperty;
	    lodash.memoize = memoize;
	    lodash.merge = merge;
	    lodash.mergeWith = mergeWith;
	    lodash.method = method;
	    lodash.methodOf = methodOf;
	    lodash.mixin = mixin;
	    lodash.negate = negate;
	    lodash.nthArg = nthArg;
	    lodash.omit = omit;
	    lodash.omitBy = omitBy;
	    lodash.once = once;
	    lodash.orderBy = orderBy;
	    lodash.over = over;
	    lodash.overArgs = overArgs;
	    lodash.overEvery = overEvery;
	    lodash.overSome = overSome;
	    lodash.partial = partial;
	    lodash.partialRight = partialRight;
	    lodash.partition = partition;
	    lodash.pick = pick;
	    lodash.pickBy = pickBy;
	    lodash.property = property;
	    lodash.propertyOf = propertyOf;
	    lodash.pull = pull;
	    lodash.pullAll = pullAll;
	    lodash.pullAllBy = pullAllBy;
	    lodash.pullAllWith = pullAllWith;
	    lodash.pullAt = pullAt;
	    lodash.range = range;
	    lodash.rangeRight = rangeRight;
	    lodash.rearg = rearg;
	    lodash.reject = reject;
	    lodash.remove = remove;
	    lodash.rest = rest;
	    lodash.reverse = reverse;
	    lodash.sampleSize = sampleSize;
	    lodash.set = set;
	    lodash.setWith = setWith;
	    lodash.shuffle = shuffle;
	    lodash.slice = slice;
	    lodash.sortBy = sortBy;
	    lodash.sortedUniq = sortedUniq;
	    lodash.sortedUniqBy = sortedUniqBy;
	    lodash.split = split;
	    lodash.spread = spread;
	    lodash.tail = tail;
	    lodash.take = take;
	    lodash.takeRight = takeRight;
	    lodash.takeRightWhile = takeRightWhile;
	    lodash.takeWhile = takeWhile;
	    lodash.tap = tap;
	    lodash.throttle = throttle;
	    lodash.thru = thru;
	    lodash.toArray = toArray;
	    lodash.toPairs = toPairs;
	    lodash.toPairsIn = toPairsIn;
	    lodash.toPath = toPath;
	    lodash.toPlainObject = toPlainObject;
	    lodash.transform = transform;
	    lodash.unary = unary;
	    lodash.union = union;
	    lodash.unionBy = unionBy;
	    lodash.unionWith = unionWith;
	    lodash.uniq = uniq;
	    lodash.uniqBy = uniqBy;
	    lodash.uniqWith = uniqWith;
	    lodash.unset = unset;
	    lodash.unzip = unzip;
	    lodash.unzipWith = unzipWith;
	    lodash.update = update;
	    lodash.updateWith = updateWith;
	    lodash.values = values;
	    lodash.valuesIn = valuesIn;
	    lodash.without = without;
	    lodash.words = words;
	    lodash.wrap = wrap;
	    lodash.xor = xor;
	    lodash.xorBy = xorBy;
	    lodash.xorWith = xorWith;
	    lodash.zip = zip;
	    lodash.zipObject = zipObject;
	    lodash.zipObjectDeep = zipObjectDeep;
	    lodash.zipWith = zipWith;

	    // Add aliases.
	    lodash.entries = toPairs;
	    lodash.entriesIn = toPairsIn;
	    lodash.extend = assignIn;
	    lodash.extendWith = assignInWith;

	    // Add methods to `lodash.prototype`.
	    mixin(lodash, lodash);

	    /*------------------------------------------------------------------------*/

	    // Add methods that return unwrapped values in chain sequences.
	    lodash.add = add;
	    lodash.attempt = attempt;
	    lodash.camelCase = camelCase;
	    lodash.capitalize = capitalize;
	    lodash.ceil = ceil;
	    lodash.clamp = clamp;
	    lodash.clone = clone;
	    lodash.cloneDeep = cloneDeep;
	    lodash.cloneDeepWith = cloneDeepWith;
	    lodash.cloneWith = cloneWith;
	    lodash.deburr = deburr;
	    lodash.divide = divide;
	    lodash.endsWith = endsWith;
	    lodash.eq = eq;
	    lodash.escape = escape;
	    lodash.escapeRegExp = escapeRegExp;
	    lodash.every = every;
	    lodash.find = find;
	    lodash.findIndex = findIndex;
	    lodash.findKey = findKey;
	    lodash.findLast = findLast;
	    lodash.findLastIndex = findLastIndex;
	    lodash.findLastKey = findLastKey;
	    lodash.floor = floor;
	    lodash.forEach = forEach;
	    lodash.forEachRight = forEachRight;
	    lodash.forIn = forIn;
	    lodash.forInRight = forInRight;
	    lodash.forOwn = forOwn;
	    lodash.forOwnRight = forOwnRight;
	    lodash.get = get;
	    lodash.gt = gt;
	    lodash.gte = gte;
	    lodash.has = has;
	    lodash.hasIn = hasIn;
	    lodash.head = head;
	    lodash.identity = identity;
	    lodash.includes = includes;
	    lodash.indexOf = indexOf;
	    lodash.inRange = inRange;
	    lodash.invoke = invoke;
	    lodash.isArguments = isArguments;
	    lodash.isArray = isArray;
	    lodash.isArrayBuffer = isArrayBuffer;
	    lodash.isArrayLike = isArrayLike;
	    lodash.isArrayLikeObject = isArrayLikeObject;
	    lodash.isBoolean = isBoolean;
	    lodash.isBuffer = isBuffer;
	    lodash.isDate = isDate;
	    lodash.isElement = isElement;
	    lodash.isEmpty = isEmpty;
	    lodash.isEqual = isEqual;
	    lodash.isEqualWith = isEqualWith;
	    lodash.isError = isError;
	    lodash.isFinite = isFinite;
	    lodash.isFunction = isFunction;
	    lodash.isInteger = isInteger;
	    lodash.isLength = isLength;
	    lodash.isMap = isMap;
	    lodash.isMatch = isMatch;
	    lodash.isMatchWith = isMatchWith;
	    lodash.isNaN = isNaN;
	    lodash.isNative = isNative;
	    lodash.isNil = isNil;
	    lodash.isNull = isNull;
	    lodash.isNumber = isNumber;
	    lodash.isObject = isObject;
	    lodash.isObjectLike = isObjectLike;
	    lodash.isPlainObject = isPlainObject;
	    lodash.isRegExp = isRegExp;
	    lodash.isSafeInteger = isSafeInteger;
	    lodash.isSet = isSet;
	    lodash.isString = isString;
	    lodash.isSymbol = isSymbol;
	    lodash.isTypedArray = isTypedArray;
	    lodash.isUndefined = isUndefined;
	    lodash.isWeakMap = isWeakMap;
	    lodash.isWeakSet = isWeakSet;
	    lodash.join = join;
	    lodash.kebabCase = kebabCase;
	    lodash.last = last;
	    lodash.lastIndexOf = lastIndexOf;
	    lodash.lowerCase = lowerCase;
	    lodash.lowerFirst = lowerFirst;
	    lodash.lt = lt;
	    lodash.lte = lte;
	    lodash.max = max;
	    lodash.maxBy = maxBy;
	    lodash.mean = mean;
	    lodash.meanBy = meanBy;
	    lodash.min = min;
	    lodash.minBy = minBy;
	    lodash.multiply = multiply;
	    lodash.nth = nth;
	    lodash.noConflict = noConflict;
	    lodash.noop = noop;
	    lodash.now = now;
	    lodash.pad = pad;
	    lodash.padEnd = padEnd;
	    lodash.padStart = padStart;
	    lodash.parseInt = parseInt;
	    lodash.random = random;
	    lodash.reduce = reduce;
	    lodash.reduceRight = reduceRight;
	    lodash.repeat = repeat;
	    lodash.replace = replace;
	    lodash.result = result;
	    lodash.round = round;
	    lodash.runInContext = runInContext;
	    lodash.sample = sample;
	    lodash.size = size;
	    lodash.snakeCase = snakeCase;
	    lodash.some = some;
	    lodash.sortedIndex = sortedIndex;
	    lodash.sortedIndexBy = sortedIndexBy;
	    lodash.sortedIndexOf = sortedIndexOf;
	    lodash.sortedLastIndex = sortedLastIndex;
	    lodash.sortedLastIndexBy = sortedLastIndexBy;
	    lodash.sortedLastIndexOf = sortedLastIndexOf;
	    lodash.startCase = startCase;
	    lodash.startsWith = startsWith;
	    lodash.subtract = subtract;
	    lodash.sum = sum;
	    lodash.sumBy = sumBy;
	    lodash.template = template;
	    lodash.times = times;
	    lodash.toInteger = toInteger;
	    lodash.toLength = toLength;
	    lodash.toLower = toLower;
	    lodash.toNumber = toNumber;
	    lodash.toSafeInteger = toSafeInteger;
	    lodash.toString = toString;
	    lodash.toUpper = toUpper;
	    lodash.trim = trim;
	    lodash.trimEnd = trimEnd;
	    lodash.trimStart = trimStart;
	    lodash.truncate = truncate;
	    lodash.unescape = unescape;
	    lodash.uniqueId = uniqueId;
	    lodash.upperCase = upperCase;
	    lodash.upperFirst = upperFirst;

	    // Add aliases.
	    lodash.each = forEach;
	    lodash.eachRight = forEachRight;
	    lodash.first = head;

	    mixin(lodash, (function() {
	      var source = {};
	      baseForOwn(lodash, function(func, methodName) {
	        if (!hasOwnProperty.call(lodash.prototype, methodName)) {
	          source[methodName] = func;
	        }
	      });
	      return source;
	    }()), { 'chain': false });

	    /*------------------------------------------------------------------------*/

	    /**
	     * The semantic version number.
	     *
	     * @static
	     * @memberOf _
	     * @type {string}
	     */
	    lodash.VERSION = VERSION;

	    // Assign default placeholders.
	    arrayEach(['bind', 'bindKey', 'curry', 'curryRight', 'partial', 'partialRight'], function(methodName) {
	      lodash[methodName].placeholder = lodash;
	    });

	    // Add `LazyWrapper` methods for `_.drop` and `_.take` variants.
	    arrayEach(['drop', 'take'], function(methodName, index) {
	      LazyWrapper.prototype[methodName] = function(n) {
	        var filtered = this.__filtered__;
	        if (filtered && !index) {
	          return new LazyWrapper(this);
	        }
	        n = n === undefined ? 1 : nativeMax(toInteger(n), 0);

	        var result = this.clone();
	        if (filtered) {
	          result.__takeCount__ = nativeMin(n, result.__takeCount__);
	        } else {
	          result.__views__.push({
	            'size': nativeMin(n, MAX_ARRAY_LENGTH),
	            'type': methodName + (result.__dir__ < 0 ? 'Right' : '')
	          });
	        }
	        return result;
	      };

	      LazyWrapper.prototype[methodName + 'Right'] = function(n) {
	        return this.reverse()[methodName](n).reverse();
	      };
	    });

	    // Add `LazyWrapper` methods that accept an `iteratee` value.
	    arrayEach(['filter', 'map', 'takeWhile'], function(methodName, index) {
	      var type = index + 1,
	          isFilter = type == LAZY_FILTER_FLAG || type == LAZY_WHILE_FLAG;

	      LazyWrapper.prototype[methodName] = function(iteratee) {
	        var result = this.clone();
	        result.__iteratees__.push({
	          'iteratee': getIteratee(iteratee, 3),
	          'type': type
	        });
	        result.__filtered__ = result.__filtered__ || isFilter;
	        return result;
	      };
	    });

	    // Add `LazyWrapper` methods for `_.head` and `_.last`.
	    arrayEach(['head', 'last'], function(methodName, index) {
	      var takeName = 'take' + (index ? 'Right' : '');

	      LazyWrapper.prototype[methodName] = function() {
	        return this[takeName](1).value()[0];
	      };
	    });

	    // Add `LazyWrapper` methods for `_.initial` and `_.tail`.
	    arrayEach(['initial', 'tail'], function(methodName, index) {
	      var dropName = 'drop' + (index ? '' : 'Right');

	      LazyWrapper.prototype[methodName] = function() {
	        return this.__filtered__ ? new LazyWrapper(this) : this[dropName](1);
	      };
	    });

	    LazyWrapper.prototype.compact = function() {
	      return this.filter(identity);
	    };

	    LazyWrapper.prototype.find = function(predicate) {
	      return this.filter(predicate).head();
	    };

	    LazyWrapper.prototype.findLast = function(predicate) {
	      return this.reverse().find(predicate);
	    };

	    LazyWrapper.prototype.invokeMap = rest(function(path, args) {
	      if (typeof path == 'function') {
	        return new LazyWrapper(this);
	      }
	      return this.map(function(value) {
	        return baseInvoke(value, path, args);
	      });
	    });

	    LazyWrapper.prototype.reject = function(predicate) {
	      predicate = getIteratee(predicate, 3);
	      return this.filter(function(value) {
	        return !predicate(value);
	      });
	    };

	    LazyWrapper.prototype.slice = function(start, end) {
	      start = toInteger(start);

	      var result = this;
	      if (result.__filtered__ && (start > 0 || end < 0)) {
	        return new LazyWrapper(result);
	      }
	      if (start < 0) {
	        result = result.takeRight(-start);
	      } else if (start) {
	        result = result.drop(start);
	      }
	      if (end !== undefined) {
	        end = toInteger(end);
	        result = end < 0 ? result.dropRight(-end) : result.take(end - start);
	      }
	      return result;
	    };

	    LazyWrapper.prototype.takeRightWhile = function(predicate) {
	      return this.reverse().takeWhile(predicate).reverse();
	    };

	    LazyWrapper.prototype.toArray = function() {
	      return this.take(MAX_ARRAY_LENGTH);
	    };

	    // Add `LazyWrapper` methods to `lodash.prototype`.
	    baseForOwn(LazyWrapper.prototype, function(func, methodName) {
	      var checkIteratee = /^(?:filter|find|map|reject)|While$/.test(methodName),
	          isTaker = /^(?:head|last)$/.test(methodName),
	          lodashFunc = lodash[isTaker ? ('take' + (methodName == 'last' ? 'Right' : '')) : methodName],
	          retUnwrapped = isTaker || /^find/.test(methodName);

	      if (!lodashFunc) {
	        return;
	      }
	      lodash.prototype[methodName] = function() {
	        var value = this.__wrapped__,
	            args = isTaker ? [1] : arguments,
	            isLazy = value instanceof LazyWrapper,
	            iteratee = args[0],
	            useLazy = isLazy || isArray(value);

	        var interceptor = function(value) {
	          var result = lodashFunc.apply(lodash, arrayPush([value], args));
	          return (isTaker && chainAll) ? result[0] : result;
	        };

	        if (useLazy && checkIteratee && typeof iteratee == 'function' && iteratee.length != 1) {
	          // Avoid lazy use if the iteratee has a "length" value other than `1`.
	          isLazy = useLazy = false;
	        }
	        var chainAll = this.__chain__,
	            isHybrid = !!this.__actions__.length,
	            isUnwrapped = retUnwrapped && !chainAll,
	            onlyLazy = isLazy && !isHybrid;

	        if (!retUnwrapped && useLazy) {
	          value = onlyLazy ? value : new LazyWrapper(this);
	          var result = func.apply(value, args);
	          result.__actions__.push({ 'func': thru, 'args': [interceptor], 'thisArg': undefined });
	          return new LodashWrapper(result, chainAll);
	        }
	        if (isUnwrapped && onlyLazy) {
	          return func.apply(this, args);
	        }
	        result = this.thru(interceptor);
	        return isUnwrapped ? (isTaker ? result.value()[0] : result.value()) : result;
	      };
	    });

	    // Add `Array` methods to `lodash.prototype`.
	    arrayEach(['pop', 'push', 'shift', 'sort', 'splice', 'unshift'], function(methodName) {
	      var func = arrayProto[methodName],
	          chainName = /^(?:push|sort|unshift)$/.test(methodName) ? 'tap' : 'thru',
	          retUnwrapped = /^(?:pop|shift)$/.test(methodName);

	      lodash.prototype[methodName] = function() {
	        var args = arguments;
	        if (retUnwrapped && !this.__chain__) {
	          var value = this.value();
	          return func.apply(isArray(value) ? value : [], args);
	        }
	        return this[chainName](function(value) {
	          return func.apply(isArray(value) ? value : [], args);
	        });
	      };
	    });

	    // Map minified method names to their real names.
	    baseForOwn(LazyWrapper.prototype, function(func, methodName) {
	      var lodashFunc = lodash[methodName];
	      if (lodashFunc) {
	        var key = (lodashFunc.name + ''),
	            names = realNames[key] || (realNames[key] = []);

	        names.push({ 'name': methodName, 'func': lodashFunc });
	      }
	    });

	    realNames[createHybridWrapper(undefined, BIND_KEY_FLAG).name] = [{
	      'name': 'wrapper',
	      'func': undefined
	    }];

	    // Add methods to `LazyWrapper`.
	    LazyWrapper.prototype.clone = lazyClone;
	    LazyWrapper.prototype.reverse = lazyReverse;
	    LazyWrapper.prototype.value = lazyValue;

	    // Add chain sequence methods to the `lodash` wrapper.
	    lodash.prototype.at = wrapperAt;
	    lodash.prototype.chain = wrapperChain;
	    lodash.prototype.commit = wrapperCommit;
	    lodash.prototype.next = wrapperNext;
	    lodash.prototype.plant = wrapperPlant;
	    lodash.prototype.reverse = wrapperReverse;
	    lodash.prototype.toJSON = lodash.prototype.valueOf = lodash.prototype.value = wrapperValue;

	    if (iteratorSymbol) {
	      lodash.prototype[iteratorSymbol] = wrapperToIterator;
	    }
	    return lodash;
	  }

	  /*--------------------------------------------------------------------------*/

	  // Export lodash.
	  var _ = runInContext();

	  // Expose lodash on the free variable `window` or `self` when available. This
	  // prevents errors in cases where lodash is loaded by a script tag in the presence
	  // of an AMD loader. See http://requirejs.org/docs/errors.html#mismatch for more details.
	  (freeWindow || freeSelf || {})._ = _;

	  // Some AMD build optimizers like r.js check for condition patterns like the following:
	  if (true) {
	    // Define as an anonymous module so, through path mapping, it can be
	    // referenced as the "underscore" module.
	    !(__WEBPACK_AMD_DEFINE_RESULT__ = function() {
	      return _;
	    }.call(exports, __webpack_require__, exports, module), __WEBPACK_AMD_DEFINE_RESULT__ !== undefined && (module.exports = __WEBPACK_AMD_DEFINE_RESULT__));
	  }
	  // Check for `exports` after `define` in case a build optimizer adds an `exports` object.
	  else if (freeExports && freeModule) {
	    // Export for Node.js.
	    if (moduleExports) {
	      (freeModule.exports = _)._ = _;
	    }
	    // Export for CommonJS support.
	    freeExports._ = _;
	  }
	  else {
	    // Export to the global object.
	    root._ = _;
	  }
	}.call(this));

	/* WEBPACK VAR INJECTION */}.call(exports, __webpack_require__(76)(module), (function() { return this; }())))

/***/ },
/* 226 */
/***/ function(module, exports, __webpack_require__) {

	var __WEBPACK_AMD_DEFINE_FACTORY__, __WEBPACK_AMD_DEFINE_RESULT__;/* WEBPACK VAR INJECTION */(function(setImmediate, clearImmediate) {/*
	 * @name Lazy.js
	 *
	 * @fileOverview
	 * Lazy.js is a lazy evaluation library for JavaScript.
	 *
	 * This has been done before. For examples see:
	 *
	 * - [wu.js](http://fitzgen.github.io/wu.js/)
	 * - [Linq.js](http://linqjs.codeplex.com/)
	 * - [from.js](https://github.com/suckgamoni/fromjs/)
	 * - [IxJS](http://rx.codeplex.com/)
	 * - [sloth.js](http://rfw.name/sloth.js/)
	 *
	 * However, at least at present, Lazy.js is faster (on average) than any of
	 * those libraries. It is also more complete, with nearly all of the
	 * functionality of [Underscore](http://underscorejs.org/) and
	 * [Lo-Dash](http://lodash.com/).
	 *
	 * Finding your way around the code
	 * --------------------------------
	 *
	 * At the heart of Lazy.js is the {@link Sequence} object. You create an initial
	 * sequence using {@link Lazy}, which can accept an array, object, or string.
	 * You can then "chain" together methods from this sequence, creating a new
	 * sequence with each call.
	 *
	 * Here's an example:
	 *
	 *     var data = getReallyBigArray();
	 *
	 *     var statistics = Lazy(data)
	 *       .map(transform)
	 *       .filter(validate)
	 *       .reduce(aggregate);
	 *
	 * {@link Sequence} is the foundation of other, more specific sequence types.
	 *
	 * An {@link ArrayLikeSequence} provides indexed access to its elements.
	 *
	 * An {@link ObjectLikeSequence} consists of key/value pairs.
	 *
	 * A {@link StringLikeSequence} is like a string (duh): actually, it is an
	 * {@link ArrayLikeSequence} whose elements happen to be characters.
	 *
	 * An {@link AsyncSequence} is special: it iterates over its elements
	 * asynchronously (so calling `each` generally begins an asynchronous loop and
	 * returns immediately).
	 *
	 * For more information
	 * --------------------
	 *
	 * I wrote a blog post that explains a little bit more about Lazy.js, which you
	 * can read [here](http://philosopherdeveloper.com/posts/introducing-lazy-js.html).
	 *
	 * You can also [create an issue on GitHub](https://github.com/dtao/lazy.js/issues)
	 * if you have any issues with the library. I work through them eventually.
	 *
	 * [@dtao](https://github.com/dtao)
	 */

	(function(root, factory) {
	  if (true) {
	    !(__WEBPACK_AMD_DEFINE_FACTORY__ = (factory), __WEBPACK_AMD_DEFINE_RESULT__ = (typeof __WEBPACK_AMD_DEFINE_FACTORY__ === 'function' ? (__WEBPACK_AMD_DEFINE_FACTORY__.call(exports, __webpack_require__, exports, module)) : __WEBPACK_AMD_DEFINE_FACTORY__), __WEBPACK_AMD_DEFINE_RESULT__ !== undefined && (module.exports = __WEBPACK_AMD_DEFINE_RESULT__));
	  } else if (typeof exports === 'object') {
	    module.exports = factory();
	  } else {
	    root.Lazy = factory();
	  }
	})(this, function(context) {
	  /**
	   * Wraps an object and returns a {@link Sequence}. For `null` or `undefined`,
	   * simply returns an empty sequence (see {@link Lazy.strict} for a stricter
	   * implementation).
	   *
	   * - For **arrays**, Lazy will create a sequence comprising the elements in
	   *   the array (an {@link ArrayLikeSequence}).
	   * - For **objects**, Lazy will create a sequence of key/value pairs
	   *   (an {@link ObjectLikeSequence}).
	   * - For **strings**, Lazy will create a sequence of characters (a
	   *   {@link StringLikeSequence}).
	   *
	   * @public
	   * @param {Array|Object|string} source An array, object, or string to wrap.
	   * @returns {Sequence} The wrapped lazy object.
	   *
	   * @exampleHelpers
	   * // Utility functions to provide to all examples
	   * function increment(x) { return x + 1; }
	   * function isEven(x) { return x % 2 === 0; }
	   * function isPositive(x) { return x > 0; }
	   * function isNegative(x) { return x < 0; }
	   *
	   * @examples
	   * Lazy([1, 2, 4])       // instanceof Lazy.ArrayLikeSequence
	   * Lazy({ foo: "bar" })  // instanceof Lazy.ObjectLikeSequence
	   * Lazy("hello, world!") // instanceof Lazy.StringLikeSequence
	   * Lazy()                // sequence: []
	   * Lazy(null)            // sequence: []
	   */
	  function Lazy(source) {
	    if (source instanceof Array) {
	      return new ArrayWrapper(source);

	    } else if (typeof source === "string") {
	      return new StringWrapper(source);

	    } else if (source instanceof Sequence) {
	      return source;
	    }

	    if (Lazy.extensions) {
	      var extensions = Lazy.extensions, length = extensions.length, result;
	      while (!result && length--) {
	        result = extensions[length](source);
	      }
	      if (result) {
	        return result;
	      }
	    }

	    return new ObjectWrapper(source);
	  }

	  Lazy.VERSION = '0.4.2';

	  /*** Utility methods of questionable value ***/

	  Lazy.noop = function noop() {};
	  Lazy.identity = function identity(x) { return x; };

	  /**
	   * Provides a stricter version of {@link Lazy} which throws an error when
	   * attempting to wrap `null`, `undefined`, or numeric or boolean values as a
	   * sequence.
	   *
	   * @public
	   * @returns {Function} A stricter version of the {@link Lazy} helper function.
	   *
	   * @examples
	   * var Strict = Lazy.strict();
	   *
	   * Strict()                  // throws
	   * Strict(null)              // throws
	   * Strict(true)              // throws
	   * Strict(5)                 // throws
	   * Strict([1, 2, 3])         // instanceof Lazy.ArrayLikeSequence
	   * Strict({ foo: "bar" })    // instanceof Lazy.ObjectLikeSequence
	   * Strict("hello, world!")   // instanceof Lazy.StringLikeSequence
	   *
	   * // Let's also ensure the static functions are still there.
	   * Strict.range(3)           // sequence: [0, 1, 2]
	   * Strict.generate(Date.now) // instanceof Lazy.GeneratedSequence
	   */
	  Lazy.strict = function strict() {
	    function StrictLazy(source) {
	      if (source == null) {
	        throw new Error("You cannot wrap null or undefined using Lazy.");
	      }

	      if (typeof source === "number" || typeof source === "boolean") {
	        throw new Error("You cannot wrap primitive values using Lazy.");
	      }

	      return Lazy(source);
	    };

	    Lazy(Lazy).each(function(property, name) {
	      StrictLazy[name] = property;
	    });

	    return StrictLazy;
	  };

	  /**
	   * The `Sequence` object provides a unified API encapsulating the notion of
	   * zero or more consecutive elements in a collection, stream, etc.
	   *
	   * Lazy evaluation
	   * ---------------
	   *
	   * Generally speaking, creating a sequence should not be an expensive operation,
	   * and should not iterate over an underlying source or trigger any side effects.
	   * This means that chaining together methods that return sequences incurs only
	   * the cost of creating the `Sequence` objects themselves and not the cost of
	   * iterating an underlying data source multiple times.
	   *
	   * The following code, for example, creates 4 sequences and does nothing with
	   * `source`:
	   *
	   *     var seq = Lazy(source) // 1st sequence
	   *       .map(func)           // 2nd
	   *       .filter(pred)        // 3rd
	   *       .reverse();          // 4th
	   *
	   * Lazy's convention is to hold off on iterating or otherwise *doing* anything
	   * (aside from creating `Sequence` objects) until you call `each`:
	   *
	   *     seq.each(function(x) { console.log(x); });
	   *
	   * Defining custom sequences
	   * -------------------------
	   *
	   * Defining your own type of sequence is relatively simple:
	   *
	   * 1. Pass a *method name* and an object containing *function overrides* to
	   *    {@link Sequence.define}. If the object includes a function called `init`,
	   *    this function will be called upon initialization.
	   * 2. The object should include at least either a `getIterator` method or an
	   *    `each` method. The former supports both asynchronous and synchronous
	   *    iteration, but is slightly more cumbersome to implement. The latter
	   *    supports synchronous iteration and can be automatically implemented in
	   *    terms of the former. You can also implement both if you want, e.g. to
	   *    optimize performance. For more info, see {@link Iterator} and
	   *    {@link AsyncSequence}.
	   *
	   * As a trivial example, the following code defines a new method, `sample`,
	   * which randomly may or may not include each element from its parent.
	   *
	   *     Lazy.Sequence.define("sample", {
	   *       each: function(fn) {
	   *         return this.parent.each(function(e) {
	   *           // 50/50 chance of including this element.
	   *           if (Math.random() > 0.5) {
	   *             return fn(e);
	   *           }
	   *         });
	   *       }
	   *     });
	   *
	   * (Of course, the above could also easily have been implemented using
	   * {@link #filter} instead of creating a custom sequence. But I *did* say this
	   * was a trivial example, to be fair.)
	   *
	   * Now it will be possible to create this type of sequence from any parent
	   * sequence by calling the method name you specified. In other words, you can
	   * now do this:
	   *
	   *     Lazy(arr).sample();
	   *     Lazy(arr).map(func).sample();
	   *     Lazy(arr).map(func).filter(pred).sample();
	   *
	   * Etc., etc.
	   *
	   * @public
	   * @constructor
	   */
	  function Sequence() {}

	  /**
	   * Create a new constructor function for a type inheriting from `Sequence`.
	   *
	   * @public
	   * @param {string|Array.<string>} methodName The name(s) of the method(s) to be
	   *     used for constructing the new sequence. The method will be attached to
	   *     the `Sequence` prototype so that it can be chained with any other
	   *     sequence methods, like {@link #map}, {@link #filter}, etc.
	   * @param {Object} overrides An object containing function overrides for this
	   *     new sequence type. **Must** include either `getIterator` or `each` (or
	   *     both). *May* include an `init` method as well. For these overrides,
	   *     `this` will be the new sequence, and `this.parent` will be the base
	   *     sequence from which the new sequence was constructed.
	   * @returns {Function} A constructor for a new type inheriting from `Sequence`.
	   *
	   * @examples
	   * // This sequence type logs every element to the specified logger as it
	   * // iterates over it.
	   * Lazy.Sequence.define("verbose", {
	   *   init: function(logger) {
	   *     this.logger = logger;
	   *   },
	   *
	   *   each: function(fn) {
	   *     var logger = this.logger;
	   *     return this.parent.each(function(e, i) {
	   *       logger(e);
	   *       return fn(e, i);
	   *     });
	   *   }
	   * });
	   *
	   * Lazy([1, 2, 3]).verbose(logger).each(Lazy.noop) // calls logger 3 times
	   */
	  Sequence.define = function define(methodName, overrides) {
	    if (!overrides || (!overrides.getIterator && !overrides.each)) {
	      throw new Error("A custom sequence must implement *at least* getIterator or each!");
	    }

	    return defineSequenceType(Sequence, methodName, overrides);
	  };

	  /**
	   * Gets the number of elements in the sequence. In some cases, this may
	   * require eagerly evaluating the sequence.
	   *
	   * @public
	   * @returns {number} The number of elements in the sequence.
	   *
	   * @examples
	   * Lazy([1, 2, 3]).size();                 // => 3
	   * Lazy([1, 2]).map(Lazy.identity).size(); // => 2
	   * Lazy([1, 2, 3]).reject(isEven).size();  // => 2
	   * Lazy([1, 2, 3]).take(1).size();         // => 1
	   * Lazy({ foo: 1, bar: 2 }).size();        // => 2
	   * Lazy('hello').size();                   // => 5
	   */
	  Sequence.prototype.size = function size() {
	    return this.getIndex().length();
	  };

	  /**
	   * Creates an {@link Iterator} object with two methods, `moveNext` -- returning
	   * true or false -- and `current` -- returning the current value.
	   *
	   * This method is used when asynchronously iterating over sequences. Any type
	   * inheriting from `Sequence` must implement this method or it can't support
	   * asynchronous iteration.
	   *
	   * Note that **this method is not intended to be used directly by application
	   * code.** Rather, it is intended as a means for implementors to potentially
	   * define custom sequence types that support either synchronous or
	   * asynchronous iteration.
	   *
	   * @public
	   * @returns {Iterator} An iterator object.
	   *
	   * @examples
	   * var iterator = Lazy([1, 2]).getIterator();
	   *
	   * iterator.moveNext(); // => true
	   * iterator.current();  // => 1
	   * iterator.moveNext(); // => true
	   * iterator.current();  // => 2
	   * iterator.moveNext(); // => false
	   */
	  Sequence.prototype.getIterator = function getIterator() {
	    return new Iterator(this);
	  };

	  /**
	   * Gets the root sequence underlying the current chain of sequences.
	   */
	  Sequence.prototype.root = function root() {
	    return this.parent.root();
	  };

	  /**
	   * Whether or not the current sequence is an asynchronous one. This is more
	   * accurate than checking `instanceof {@link AsyncSequence}` because, for
	   * example, `Lazy([1, 2, 3]).async().map(Lazy.identity)` returns a sequence
	   * that iterates asynchronously even though it's not an instance of
	   * `AsyncSequence`.
	   *
	   * @returns {boolean} Whether or not the current sequence is an asynchronous one.
	   */
	  Sequence.prototype.isAsync = function isAsync() {
	    return this.parent ? this.parent.isAsync() : false;
	  };

	  /**
	   * Evaluates the sequence and produces the appropriate value (an array in most
	   * cases, an object for {@link ObjectLikeSequence}s or a string for
	   * {@link StringLikeSequence}s).
	   *
	   * @returns {Array|string|Object} The value resulting from fully evaluating
	   *     the sequence.
	   */
	  Sequence.prototype.value = function value() {
	    return this.toArray();
	  };

	  /**
	   * Applies the current transformation chain to a given source, returning the
	   * resulting value.
	   *
	   * @examples
	   * var sequence = Lazy([])
	   *   .map(function(x) { return x * -1; })
	   *   .filter(function(x) { return x % 2 === 0; });
	   *
	   * sequence.apply([1, 2, 3, 4]); // => [-2, -4]
	   */
	  Sequence.prototype.apply = function apply(source) {
	    var root = this.root(),
	        previousSource = root.source,
	        result;

	    try {
	      root.source = source;
	      result = this.value();
	    } finally {
	      root.source = previousSource;
	    }

	    return result;
	  };

	  /**
	   * The Iterator object provides an API for iterating over a sequence.
	   *
	   * The purpose of the `Iterator` type is mainly to offer an agnostic way of
	   * iterating over a sequence -- either synchronous (i.e. with a `while` loop)
	   * or asynchronously (with recursive calls to either `setTimeout` or --- if
	   * available --- `setImmediate`). It is not intended to be used directly by
	   * application code.
	   *
	   * @public
	   * @constructor
	   * @param {Sequence} sequence The sequence to iterate over.
	   */
	  function Iterator(sequence) {
	    this.sequence = sequence;
	    this.index    = -1;
	  }

	  /**
	   * Gets the current item this iterator is pointing to.
	   *
	   * @public
	   * @returns {*} The current item.
	   */
	  Iterator.prototype.current = function current() {
	    return this.cachedIndex && this.cachedIndex.get(this.index);
	  };

	  /**
	   * Moves the iterator to the next item in a sequence, if possible.
	   *
	   * @public
	   * @returns {boolean} True if the iterator is able to move to a new item, or else
	   *     false.
	   */
	  Iterator.prototype.moveNext = function moveNext() {
	    var cachedIndex = this.cachedIndex;

	    if (!cachedIndex) {
	      cachedIndex = this.cachedIndex = this.sequence.getIndex();
	    }

	    if (this.index >= cachedIndex.length() - 1) {
	      return false;
	    }

	    ++this.index;
	    return true;
	  };

	  /**
	   * Creates an array snapshot of a sequence.
	   *
	   * Note that for indefinite sequences, this method may raise an exception or
	   * (worse) cause the environment to hang.
	   *
	   * @public
	   * @returns {Array} An array containing the current contents of the sequence.
	   *
	   * @examples
	   * Lazy([1, 2, 3]).toArray() // => [1, 2, 3]
	   */
	  Sequence.prototype.toArray = function toArray() {
	    return this.reduce(function(arr, element) {
	      arr.push(element);
	      return arr;
	    }, []);
	  };

	  /**
	   * Provides an indexed view into the sequence.
	   *
	   * For sequences that are already indexed, this will simply return the
	   * sequence. For non-indexed sequences, this will eagerly evaluate the
	   * sequence.
	   *
	   * @returns {ArrayLikeSequence} A sequence containing the current contents of
	   *     the sequence.
	   *
	   * @examples
	   * Lazy([1, 2, 3]).filter(isEven)            // instanceof Lazy.Sequence
	   * Lazy([1, 2, 3]).filter(isEven).getIndex() // instanceof Lazy.ArrayLikeSequence
	   */
	  Sequence.prototype.getIndex = function getIndex() {
	    return new ArrayWrapper(this.toArray());
	  };

	  /**
	   * Returns the element at the specified index. Note that, for sequences that
	   * are not {@link ArrayLikeSequence}s, this may require partially evaluating
	   * the sequence, iterating to reach the result. (In other words for such
	   * sequences this method is not O(1).)
	   *
	   * @public
	   * @param {number} i The index to access.
	   * @returns {*} The element.
	   *
	   */
	  Sequence.prototype.get = function get(i) {
	    var element;
	    this.each(function(e, index) {
	      if (index === i) {
	        element = e;
	        return false;
	      }
	    });
	    return element;
	  };

	  /**
	   * Provides an indexed, memoized view into the sequence. This will cache the
	   * result whenever the sequence is first iterated, so that subsequent
	   * iterations will access the same element objects.
	   *
	   * @public
	   * @returns {ArrayLikeSequence} An indexed, memoized sequence containing this
	   *     sequence's elements, cached after the first iteration.
	   *
	   * @example
	   * function createObject() { return new Object(); }
	   *
	   * var plain    = Lazy.generate(createObject, 10),
	   *     memoized = Lazy.generate(createObject, 10).memoize();
	   *
	   * plain.toArray()[0] === plain.toArray()[0];       // => false
	   * memoized.toArray()[0] === memoized.toArray()[0]; // => true
	   */
	  Sequence.prototype.memoize = function memoize() {
	    return new MemoizedSequence(this);
	  };

	  /**
	   * @constructor
	   */
	  function MemoizedSequence(parent) {
	    this.parent = parent;
	  }

	  // MemoizedSequence needs to have its prototype set up after ArrayLikeSequence

	  /**
	   * Creates an object from a sequence of key/value pairs.
	   *
	   * @public
	   * @returns {Object} An object with keys and values corresponding to the pairs
	   *     of elements in the sequence.
	   *
	   * @examples
	   * var details = [
	   *   ["first", "Dan"],
	   *   ["last", "Tao"],
	   *   ["age", 29]
	   * ];
	   *
	   * Lazy(details).toObject() // => { first: "Dan", last: "Tao", age: 29 }
	   */
	  Sequence.prototype.toObject = function toObject() {
	    return this.reduce(function(object, pair) {
	      object[pair[0]] = pair[1];
	      return object;
	    }, {});
	  };

	  /**
	   * Iterates over this sequence and executes a function for every element.
	   *
	   * @public
	   * @aka forEach
	   * @param {Function} fn The function to call on each element in the sequence.
	   *     Return false from the function to end the iteration.
	   * @returns {boolean} `true` if the iteration evaluated the entire sequence,
	   *     or `false` if iteration was ended early.
	   *
	   * @examples
	   * Lazy([1, 2, 3, 4]).each(fn) // calls fn 4 times
	   */
	  Sequence.prototype.each = function each(fn) {
	    var iterator = this.getIterator(),
	        i = -1;

	    while (iterator.moveNext()) {
	      if (fn(iterator.current(), ++i) === false) {
	        return false;
	      }
	    }

	    return true;
	  };

	  Sequence.prototype.forEach = function forEach(fn) {
	    return this.each(fn);
	  };

	  /**
	   * Creates a new sequence whose values are calculated by passing this sequence's
	   * elements through some mapping function.
	   *
	   * @public
	   * @aka collect
	   * @param {Function} mapFn The mapping function used to project this sequence's
	   *     elements onto a new sequence. This function takes up to two arguments:
	   *     the element, and the current index.
	   * @returns {Sequence} The new sequence.
	   *
	   * @examples
	   * function addIndexToValue(e, i) { return e + i; }
	   *
	   * Lazy([]).map(increment)              // sequence: []
	   * Lazy([1, 2, 3]).map(increment)       // sequence: [2, 3, 4]
	   * Lazy([1, 2, 3]).map(addIndexToValue) // sequence: [1, 3, 5]
	   *
	   * @benchmarks
	   * function increment(x) { return x + 1; }
	   *
	   * var smArr = Lazy.range(10).toArray(),
	   *     lgArr = Lazy.range(100).toArray();
	   *
	   * Lazy(smArr).map(increment).each(Lazy.noop) // lazy - 10 elements
	   * Lazy(lgArr).map(increment).each(Lazy.noop) // lazy - 100 elements
	   * _.each(_.map(smArr, increment), _.noop)    // lodash - 10 elements
	   * _.each(_.map(lgArr, increment), _.noop)    // lodash - 100 elements
	   */
	  Sequence.prototype.map = function map(mapFn) {
	    return new MappedSequence(this, createCallback(mapFn));
	  };

	  Sequence.prototype.collect = function collect(mapFn) {
	    return this.map(mapFn);
	  };

	  /**
	   * @constructor
	   */
	  function MappedSequence(parent, mapFn) {
	    this.parent = parent;
	    this.mapFn  = mapFn;
	  }

	  MappedSequence.prototype = new Sequence();

	  MappedSequence.prototype.getIterator = function getIterator() {
	    return new MappingIterator(this.parent, this.mapFn);
	  };

	  MappedSequence.prototype.each = function each(fn) {
	    var mapFn = this.mapFn;
	    return this.parent.each(function(e, i) {
	      return fn(mapFn(e, i), i);
	    });
	  };

	  /**
	   * @constructor
	   */
	  function MappingIterator(sequence, mapFn) {
	    this.iterator = sequence.getIterator();
	    this.mapFn    = mapFn;
	    this.index    = -1;
	  }

	  MappingIterator.prototype.current = function current() {
	    return this.mapFn(this.iterator.current(), this.index);
	  };

	  MappingIterator.prototype.moveNext = function moveNext() {
	    if (this.iterator.moveNext()) {
	      ++this.index;
	      return true;
	    }

	    return false;
	  };

	  /**
	   * Creates a new sequence whose values are calculated by accessing the specified
	   * property from each element in this sequence.
	   *
	   * @public
	   * @param {string} propertyName The name of the property to access for every
	   *     element in this sequence.
	   * @returns {Sequence} The new sequence.
	   *
	   * @examples
	   * var people = [
	   *   { first: "Dan", last: "Tao" },
	   *   { first: "Bob", last: "Smith" }
	   * ];
	   *
	   * Lazy(people).pluck("last") // sequence: ["Tao", "Smith"]
	   */
	  Sequence.prototype.pluck = function pluck(property) {
	    return this.map(property);
	  };

	  /**
	   * Creates a new sequence whose values are calculated by invoking the specified
	   * function on each element in this sequence.
	   *
	   * @public
	   * @param {string} methodName The name of the method to invoke for every element
	   *     in this sequence.
	   * @returns {Sequence} The new sequence.
	   *
	   * @examples
	   * function Person(first, last) {
	   *   this.fullName = function fullName() {
	   *     return first + " " + last;
	   *   };
	   * }
	   *
	   * var people = [
	   *   new Person("Dan", "Tao"),
	   *   new Person("Bob", "Smith")
	   * ];
	   *
	   * Lazy(people).invoke("fullName") // sequence: ["Dan Tao", "Bob Smith"]
	   */
	  Sequence.prototype.invoke = function invoke(methodName) {
	    return this.map(function(e) {
	      return e[methodName]();
	    });
	  };

	  /**
	   * Creates a new sequence whose values are the elements of this sequence which
	   * satisfy the specified predicate.
	   *
	   * @public
	   * @aka select
	   * @param {Function} filterFn The predicate to call on each element in this
	   *     sequence, which returns true if the element should be included.
	   * @returns {Sequence} The new sequence.
	   *
	   * @examples
	   * var numbers = [1, 2, 3, 4, 5, 6];
	   *
	   * Lazy(numbers).filter(isEven) // sequence: [2, 4, 6]
	   *
	   * @benchmarks
	   * function isEven(x) { return x % 2 === 0; }
	   *
	   * var smArr = Lazy.range(10).toArray(),
	   *     lgArr = Lazy.range(100).toArray();
	   *
	   * Lazy(smArr).filter(isEven).each(Lazy.noop) // lazy - 10 elements
	   * Lazy(lgArr).filter(isEven).each(Lazy.noop) // lazy - 100 elements
	   * _.each(_.filter(smArr, isEven), _.noop)    // lodash - 10 elements
	   * _.each(_.filter(lgArr, isEven), _.noop)    // lodash - 100 elements
	   */
	  Sequence.prototype.filter = function filter(filterFn) {
	    return new FilteredSequence(this, createCallback(filterFn));
	  };

	  Sequence.prototype.select = function select(filterFn) {
	    return this.filter(filterFn);
	  };

	  /**
	   * @constructor
	   */
	  function FilteredSequence(parent, filterFn) {
	    this.parent   = parent;
	    this.filterFn = filterFn;
	  }

	  FilteredSequence.prototype = new Sequence();

	  FilteredSequence.prototype.getIterator = function getIterator() {
	    return new FilteringIterator(this.parent, this.filterFn);
	  };

	  FilteredSequence.prototype.each = function each(fn) {
	    var filterFn = this.filterFn,
	        j = 0;

	    return this.parent.each(function(e, i) {
	      if (filterFn(e, i)) {
	        return fn(e, j++);
	      }
	    });
	  };

	  FilteredSequence.prototype.reverse = function reverse() {
	    return this.parent.reverse().filter(this.filterFn);
	  };

	  /**
	   * @constructor
	   */
	  function FilteringIterator(sequence, filterFn) {
	    this.iterator = sequence.getIterator();
	    this.filterFn = filterFn;
	    this.index    = 0;
	  }

	  FilteringIterator.prototype.current = function current() {
	    return this.value;
	  };

	  FilteringIterator.prototype.moveNext = function moveNext() {
	    var iterator = this.iterator,
	        filterFn = this.filterFn,
	        value;

	    while (iterator.moveNext()) {
	      value = iterator.current();
	      if (filterFn(value, this.index++)) {
	        this.value = value;
	        return true;
	      }
	    }

	    this.value = undefined;
	    return false;
	  };

	  /**
	   * Creates a new sequence whose values exclude the elements of this sequence
	   * identified by the specified predicate.
	   *
	   * @public
	   * @param {Function} rejectFn The predicate to call on each element in this
	   *     sequence, which returns true if the element should be omitted.
	   * @returns {Sequence} The new sequence.
	   *
	   * @examples
	   * Lazy([1, 2, 3, 4, 5]).reject(isEven)              // sequence: [1, 3, 5]
	   * Lazy([{ foo: 1 }, { bar: 2 }]).reject('foo')      // sequence: [{ bar: 2 }]
	   * Lazy([{ foo: 1 }, { foo: 2 }]).reject({ foo: 2 }) // sequence: [{ foo: 1 }]
	   */
	  Sequence.prototype.reject = function reject(rejectFn) {
	    rejectFn = createCallback(rejectFn);
	    return this.filter(function(e) { return !rejectFn(e); });
	  };

	  /**
	   * Creates a new sequence whose values have the specified type, as determined
	   * by the `typeof` operator.
	   *
	   * @public
	   * @param {string} type The type of elements to include from the underlying
	   *     sequence, i.e. where `typeof [element] === [type]`.
	   * @returns {Sequence} The new sequence, comprising elements of the specified
	   *     type.
	   *
	   * @examples
	   * Lazy([1, 2, 'foo', 'bar']).ofType('number')  // sequence: [1, 2]
	   * Lazy([1, 2, 'foo', 'bar']).ofType('string')  // sequence: ['foo', 'bar']
	   * Lazy([1, 2, 'foo', 'bar']).ofType('boolean') // sequence: []
	   */
	  Sequence.prototype.ofType = function ofType(type) {
	    return this.filter(function(e) { return typeof e === type; });
	  };

	  /**
	   * Creates a new sequence whose values are the elements of this sequence with
	   * property names and values matching those of the specified object.
	   *
	   * @public
	   * @param {Object} properties The properties that should be found on every
	   *     element that is to be included in this sequence.
	   * @returns {Sequence} The new sequence.
	   *
	   * @examples
	   * var people = [
	   *   { first: "Dan", last: "Tao" },
	   *   { first: "Bob", last: "Smith" }
	   * ];
	   *
	   * Lazy(people).where({ first: "Dan" }) // sequence: [{ first: "Dan", last: "Tao" }]
	   *
	   * @benchmarks
	   * var animals = ["dog", "cat", "mouse", "horse", "pig", "snake"];
	   *
	   * Lazy(animals).where({ length: 3 }).each(Lazy.noop) // lazy
	   * _.each(_.where(animals, { length: 3 }), _.noop)    // lodash
	   */
	  Sequence.prototype.where = function where(properties) {
	    return this.filter(properties);
	  };

	  /**
	   * Creates a new sequence with the same elements as this one, but to be iterated
	   * in the opposite order.
	   *
	   * Note that in some (but not all) cases, the only way to create such a sequence
	   * may require iterating the entire underlying source when `each` is called.
	   *
	   * @public
	   * @returns {Sequence} The new sequence.
	   *
	   * @examples
	   * Lazy([1, 2, 3]).reverse() // sequence: [3, 2, 1]
	   * Lazy([]).reverse()        // sequence: []
	   */
	  Sequence.prototype.reverse = function reverse() {
	    return new ReversedSequence(this);
	  };

	  /**
	   * @constructor
	   */
	  function ReversedSequence(parent) {
	    this.parent = parent;
	  }

	  ReversedSequence.prototype = new Sequence();

	  ReversedSequence.prototype.getIterator = function getIterator() {
	    return new ReversedIterator(this.parent);
	  };

	  /**
	   * @constuctor
	   */
	  function ReversedIterator(sequence) {
	    this.sequence = sequence;
	  }

	  ReversedIterator.prototype.current = function current() {
	    return this.getIndex().get(this.index);
	  };

	  ReversedIterator.prototype.moveNext = function moveNext() {
	    var index  = this.getIndex(),
	        length = index.length();

	    if (typeof this.index === "undefined") {
	      this.index = length;
	    }

	    return (--this.index >= 0);
	  };

	  ReversedIterator.prototype.getIndex = function getIndex() {
	    if (!this.cachedIndex) {
	      this.cachedIndex = this.sequence.getIndex();
	    }

	    return this.cachedIndex;
	  };

	  /**
	   * Creates a new sequence with all of the elements of this one, plus those of
	   * the given array(s).
	   *
	   * @public
	   * @param {...*} var_args One or more values (or arrays of values) to use for
	   *     additional items after this sequence.
	   * @returns {Sequence} The new sequence.
	   *
	   * @examples
	   * var left  = [1, 2, 3];
	   * var right = [4, 5, 6];
	   *
	   * Lazy(left).concat(right)         // sequence: [1, 2, 3, 4, 5, 6]
	   * Lazy(left).concat(Lazy(right))   // sequence: [1, 2, 3, 4, 5, 6]
	   * Lazy(left).concat(right, [7, 8]) // sequence: [1, 2, 3, 4, 5, 6, 7, 8]
	   */
	  Sequence.prototype.concat = function concat(var_args) {
	    return new ConcatenatedSequence(this, arraySlice.call(arguments, 0));
	  };

	  /**
	   * @constructor
	   */
	  function ConcatenatedSequence(parent, arrays) {
	    this.parent = parent;
	    this.arrays = arrays;
	  }

	  ConcatenatedSequence.prototype = new Sequence();

	  ConcatenatedSequence.prototype.each = function each(fn) {
	    var done = false,
	        i = 0;

	    this.parent.each(function(e) {
	      if (fn(e, i++) === false) {
	        done = true;
	        return false;
	      }
	    });

	    if (!done) {
	      Lazy(this.arrays).flatten().each(function(e) {
	        if (fn(e, i++) === false) {
	          return false;
	        }
	      });
	    }
	  };

	  /**
	   * Creates a new sequence comprising the first N elements from this sequence, OR
	   * (if N is `undefined`) simply returns the first element of this sequence.
	   *
	   * @public
	   * @aka head, take
	   * @param {number=} count The number of elements to take from this sequence. If
	   *     this value exceeds the length of the sequence, the resulting sequence
	   *     will be essentially the same as this one.
	   * @returns {*} The new sequence (or the first element from this sequence if
	   *     no count was given).
	   *
	   * @examples
	   * function powerOfTwo(exp) {
	   *   return Math.pow(2, exp);
	   * }
	   *
	   * Lazy.generate(powerOfTwo).first()          // => 1
	   * Lazy.generate(powerOfTwo).first(5)         // sequence: [1, 2, 4, 8, 16]
	   * Lazy.generate(powerOfTwo).skip(2).first()  // => 4
	   * Lazy.generate(powerOfTwo).skip(2).first(2) // sequence: [4, 8]
	   */
	  Sequence.prototype.first = function first(count) {
	    if (typeof count === "undefined") {
	      return getFirst(this);
	    }
	    return new TakeSequence(this, count);
	  };

	  Sequence.prototype.head =
	  Sequence.prototype.take = function (count) {
	    return this.first(count);
	  };

	  /**
	   * @constructor
	   */
	  function TakeSequence(parent, count) {
	    this.parent = parent;
	    this.count  = count;
	  }

	  TakeSequence.prototype = new Sequence();

	  TakeSequence.prototype.getIterator = function getIterator() {
	    return new TakeIterator(this.parent, this.count);
	  };

	  TakeSequence.prototype.each = function each(fn) {
	    var count = this.count,
	        i     = 0;

	    var result;
	    var handle = this.parent.each(function(e) {
	      if (i < count) { result = fn(e, i++); }
	      if (i >= count) { return false; }
	      return result;
	    });

	    if (handle instanceof AsyncHandle) {
	      return handle;
	    }

	    return i === count && result !== false;
	  };

	  /**
	   * @constructor
	   */
	  function TakeIterator(sequence, count) {
	    this.iterator = sequence.getIterator();
	    this.count    = count;
	  }

	  TakeIterator.prototype.current = function current() {
	    return this.iterator.current();
	  };

	  TakeIterator.prototype.moveNext = function moveNext() {
	    return ((--this.count >= 0) && this.iterator.moveNext());
	  };

	  /**
	   * Creates a new sequence comprising the elements from the head of this sequence
	   * that satisfy some predicate. Once an element is encountered that doesn't
	   * satisfy the predicate, iteration will stop.
	   *
	   * @public
	   * @param {Function} predicate
	   * @returns {Sequence} The new sequence
	   *
	   * @examples
	   * function lessThan(x) {
	   *   return function(y) {
	   *     return y < x;
	   *   };
	   * }
	   *
	   * Lazy([1, 2, 3, 4]).takeWhile(lessThan(3)) // sequence: [1, 2]
	   * Lazy([1, 2, 3, 4]).takeWhile(lessThan(0)) // sequence: []
	   */
	  Sequence.prototype.takeWhile = function takeWhile(predicate) {
	    return new TakeWhileSequence(this, predicate);
	  };

	  /**
	   * @constructor
	   */
	  function TakeWhileSequence(parent, predicate) {
	    this.parent    = parent;
	    this.predicate = predicate;
	  }

	  TakeWhileSequence.prototype = new Sequence();

	  TakeWhileSequence.prototype.each = function each(fn) {
	    var predicate = this.predicate,
	        finished = false,
	        j = 0;

	    var result = this.parent.each(function(e, i) {
	      if (!predicate(e, i)) {
	        finished = true;
	        return false;
	      }

	      return fn(e, j++);
	    });

	    if (result instanceof AsyncHandle) {
	      return result;
	    }

	    return finished;
	  };

	  /**
	   * Creates a new sequence comprising all but the last N elements of this
	   * sequence.
	   *
	   * @public
	   * @param {number=} count The number of items to omit from the end of the
	   *     sequence (defaults to 1).
	   * @returns {Sequence} The new sequence.
	   *
	   * @examples
	   * Lazy([1, 2, 3, 4]).initial()                    // sequence: [1, 2, 3]
	   * Lazy([1, 2, 3, 4]).initial(2)                   // sequence: [1, 2]
	   * Lazy([1, 2, 3]).filter(Lazy.identity).initial() // sequence: [1, 2]
	   */
	  Sequence.prototype.initial = function initial(count) {
	    return new InitialSequence(this, count);
	  };

	  function InitialSequence(parent, count) {
	    this.parent = parent;
	    this.count = typeof count === "number" ? count : 1;
	  }

	  InitialSequence.prototype = new Sequence();

	  InitialSequence.prototype.each = function each(fn) {
	    var index = this.parent.getIndex();
	    return index.take(index.length() - this.count).each(fn);
	  };

	  /**
	   * Creates a new sequence comprising the last N elements of this sequence, OR
	   * (if N is `undefined`) simply returns the last element of this sequence.
	   *
	   * @public
	   * @param {number=} count The number of items to take from the end of the
	   *     sequence.
	   * @returns {*} The new sequence (or the last element from this sequence
	   *     if no count was given).
	   *
	   * @examples
	   * Lazy([1, 2, 3]).last()                 // => 3
	   * Lazy([1, 2, 3]).last(2)                // sequence: [2, 3]
	   * Lazy([1, 2, 3]).filter(isEven).last(2) // sequence: [2]
	   */
	  Sequence.prototype.last = function last(count) {
	    if (typeof count === "undefined") {
	      return this.reverse().first();
	    }
	    return this.reverse().take(count).reverse();
	  };

	  /**
	   * Returns the first element in this sequence with property names and values
	   * matching those of the specified object.
	   *
	   * @public
	   * @param {Object} properties The properties that should be found on some
	   *     element in this sequence.
	   * @returns {*} The found element, or `undefined` if none exists in this
	   *     sequence.
	   *
	   * @examples
	   * var words = ["foo", "bar"];
	   *
	   * Lazy(words).findWhere({ 0: "f" }); // => "foo"
	   * Lazy(words).findWhere({ 0: "z" }); // => undefined
	   */
	  Sequence.prototype.findWhere = function findWhere(properties) {
	    return this.where(properties).first();
	  };

	  /**
	   * Creates a new sequence comprising all but the first N elements of this
	   * sequence.
	   *
	   * @public
	   * @aka skip, tail, rest
	   * @param {number=} count The number of items to omit from the beginning of the
	   *     sequence (defaults to 1).
	   * @returns {Sequence} The new sequence.
	   *
	   * @examples
	   * Lazy([1, 2, 3, 4]).rest()  // sequence: [2, 3, 4]
	   * Lazy([1, 2, 3, 4]).rest(0) // sequence: [1, 2, 3, 4]
	   * Lazy([1, 2, 3, 4]).rest(2) // sequence: [3, 4]
	   * Lazy([1, 2, 3, 4]).rest(5) // sequence: []
	   */
	  Sequence.prototype.rest = function rest(count) {
	    return new DropSequence(this, count);
	  };

	  Sequence.prototype.skip =
	  Sequence.prototype.tail =
	  Sequence.prototype.drop = function drop(count) {
	    return this.rest(count);
	  };

	  /**
	   * @constructor
	   */
	  function DropSequence(parent, count) {
	    this.parent = parent;
	    this.count  = typeof count === "number" ? count : 1;
	  }

	  DropSequence.prototype = new Sequence();

	  DropSequence.prototype.each = function each(fn) {
	    var count   = this.count,
	        dropped = 0,
	        i       = 0;

	    return this.parent.each(function(e) {
	      if (dropped++ < count) { return; }
	      return fn(e, i++);
	    });
	  };

	  /**
	   * Creates a new sequence comprising the elements from this sequence *after*
	   * those that satisfy some predicate. The sequence starts with the first
	   * element that does not match the predicate.
	   *
	   * @public
	   * @aka skipWhile
	   * @param {Function} predicate
	   * @returns {Sequence} The new sequence
	   */
	  Sequence.prototype.dropWhile = function dropWhile(predicate) {
	    return new DropWhileSequence(this, predicate);
	  };

	  Sequence.prototype.skipWhile = function skipWhile(predicate) {
	    return this.dropWhile(predicate);
	  };

	  /**
	   * @constructor
	   */
	  function DropWhileSequence(parent, predicate) {
	    this.parent    = parent;
	    this.predicate = predicate;
	  }

	  DropWhileSequence.prototype = new Sequence();

	  DropWhileSequence.prototype.each = function each(fn) {
	    var predicate = this.predicate,
	        done      = false;

	    return this.parent.each(function(e) {
	      if (!done) {
	        if (predicate(e)) {
	          return;
	        }

	        done = true;
	      }

	      return fn(e);
	    });
	  };

	  /**
	   * Creates a new sequence with the same elements as this one, but ordered
	   * using the specified comparison function.
	   *
	   * This has essentially the same behavior as calling
	   * [`Array#sort`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/sort),
	   * but obviously instead of modifying the collection it returns a new
	   * {@link Sequence} object.
	   *
	   * @public
	   * @param {Function=} sortFn The function used to compare elements in the
	   *     sequence. The function will be passed two elements and should return:
	   *     - 1 if the first is greater
	   *     - -1 if the second is greater
	   *     - 0 if the two values are the same
	   * @param {boolean} descending Whether or not the resulting sequence should be
	   *     in descending order (defaults to `false`).
	   * @returns {Sequence} The new sequence.
	   *
	   * @examples
	   * Lazy([5, 10, 1]).sort()                // sequence: [1, 5, 10]
	   * Lazy(['foo', 'bar']).sort()            // sequence: ['bar', 'foo']
	   * Lazy(['b', 'c', 'a']).sort(null, true) // sequence: ['c', 'b', 'a']
	   * Lazy([5, 10, 1]).sort(null, true)      // sequence: [10, 5, 1]
	   *
	   * // Sorting w/ custom comparison function
	   * Lazy(['a', 'ab', 'aa', 'ba', 'b', 'abc']).sort(function compare(x, y) {
	   *   if (x.length && (x.length !== y.length)) { return compare(x.length, y.length); }
	   *   if (x === y) { return 0; }
	   *   return x > y ? 1 : -1;
	   * });
	   * // => sequence: ['a', 'b', 'aa', 'ab', 'ba', 'abc']
	   */
	  Sequence.prototype.sort = function sort(sortFn, descending) {
	    sortFn || (sortFn = compare);
	    if (descending) { sortFn = reverseArguments(sortFn); }
	    return new SortedSequence(this, sortFn);
	  };

	  /**
	   * Creates a new sequence with the same elements as this one, but ordered by
	   * the results of the given function.
	   *
	   * You can pass:
	   *
	   * - a *string*, to sort by the named property
	   * - a function, to sort by the result of calling the function on each element
	   *
	   * @public
	   * @param {Function} sortFn The function to call on the elements in this
	   *     sequence, in order to sort them.
	   * @param {boolean} descending Whether or not the resulting sequence should be
	   *     in descending order (defaults to `false`).
	   * @returns {Sequence} The new sequence.
	   *
	   * @examples
	   * function population(country) {
	   *   return country.pop;
	   * }
	   *
	   * function area(country) {
	   *   return country.sqkm;
	   * }
	   *
	   * var countries = [
	   *   { name: "USA", pop: 320000000, sqkm: 9600000 },
	   *   { name: "Brazil", pop: 194000000, sqkm: 8500000 },
	   *   { name: "Nigeria", pop: 174000000, sqkm: 924000 },
	   *   { name: "China", pop: 1350000000, sqkm: 9700000 },
	   *   { name: "Russia", pop: 143000000, sqkm: 17000000 },
	   *   { name: "Australia", pop: 23000000, sqkm: 7700000 }
	   * ];
	   *
	   * Lazy(countries).sortBy(population).last(3).pluck('name') // sequence: ["Brazil", "USA", "China"]
	   * Lazy(countries).sortBy(area).last(3).pluck('name')       // sequence: ["USA", "China", "Russia"]
	   * Lazy(countries).sortBy(area, true).first(3).pluck('name') // sequence: ["Russia", "China", "USA"]
	   *
	   * @benchmarks
	   * var randoms = Lazy.generate(Math.random).take(100).toArray();
	   *
	   * Lazy(randoms).sortBy(Lazy.identity).each(Lazy.noop) // lazy
	   * _.each(_.sortBy(randoms, Lazy.identity), _.noop)    // lodash
	   */
	  Sequence.prototype.sortBy = function sortBy(sortFn, descending) {
	    sortFn = createComparator(sortFn);
	    if (descending) { sortFn = reverseArguments(sortFn); }
	    return new SortedSequence(this, sortFn);
	  };

	  /**
	   * @constructor
	   */
	  function SortedSequence(parent, sortFn) {
	    this.parent = parent;
	    this.sortFn = sortFn;
	  }

	  SortedSequence.prototype = new Sequence();

	  SortedSequence.prototype.each = function each(fn) {
	    var sortFn = this.sortFn,
	        result = this.parent.toArray();

	    result.sort(sortFn);

	    return forEach(result, fn);
	  };

	  /**
	   * @examples
	   * var items = [{ a: 4 }, { a: 3 }, { a: 5 }];
	   *
	   * Lazy(items).sortBy('a').reverse();
	   * // => sequence: [{ a: 5 }, { a: 4 }, { a: 3 }]
	   *
	   * Lazy(items).sortBy('a').reverse().reverse();
	   * // => sequence: [{ a: 3 }, { a: 4 }, { a: 5 }]
	   */
	  SortedSequence.prototype.reverse = function reverse() {
	    return new SortedSequence(this.parent, reverseArguments(this.sortFn));
	  };

	  /**
	   * Creates a new {@link ObjectLikeSequence} comprising the elements in this
	   * one, grouped together according to some key. The value associated with each
	   * key in the resulting object-like sequence is an array containing all of
	   * the elements in this sequence with that key.
	   *
	   * @public
	   * @param {Function|string} keyFn The function to call on the elements in this
	   *     sequence to obtain a key by which to group them, or a string representing
	   *     a parameter to read from all the elements in this sequence.
	   * @param {Function|string} valFn (Optional) The function to call on the elements
	   *     in this sequence to assign to the value for each instance to appear in the
	   *     group, or a string representing a parameter to read from all the elements
	   *     in this sequence.
	   * @returns {ObjectLikeSequence} The new sequence.
	   *
	   * @examples
	   * function oddOrEven(x) {
	   *   return x % 2 === 0 ? 'even' : 'odd';
	   * }
	   * function square(x) {
	   *   return x*x;
	   * }
	   *
	   * var numbers = [1, 2, 3, 4, 5];
	   *
	   * Lazy(numbers).groupBy(oddOrEven)                     // sequence: { odd: [1, 3, 5], even: [2, 4] }
	   * Lazy(numbers).groupBy(oddOrEven).get("odd")          // => [1, 3, 5]
	   * Lazy(numbers).groupBy(oddOrEven).get("foo")          // => undefined
	   * Lazy(numbers).groupBy(oddOrEven, square).get("even") // => [4, 16]
	   *
	   * Lazy([
	   *   { name: 'toString' },
	   *   { name: 'toString' }
	   * ]).groupBy('name');
	   * // => sequence: {
	   *   'toString': [
	   *     { name: 'toString' },
	   *     { name: 'toString' }
	   *   ]
	   * }
	   */
	  Sequence.prototype.groupBy = function groupBy(keyFn, valFn) {
	    return new GroupedSequence(this, keyFn, valFn);
	  };

	  /**
	   * @constructor
	   */
	  function GroupedSequence(parent, keyFn, valFn) {
	    this.parent = parent;
	    this.keyFn  = keyFn;
	    this.valFn  = valFn;
	  }

	  // GroupedSequence must have its prototype set after ObjectLikeSequence has
	  // been fully initialized.

	  /**
	   * Creates a new {@link ObjectLikeSequence} comprising the elements in this
	   * one, indexed according to some key.
	   *
	   * @public
	   * @param {Function|string} keyFn The function to call on the elements in this
	   *     sequence to obtain a key by which to index them, or a string
	   *     representing a property to read from all the elements in this sequence.
	   * @param {Function|string} valFn (Optional) The function to call on the elements
	   *     in this sequence to assign to the value of the indexed object, or a string
	   *     representing a parameter to read from all the elements in this sequence.
	   * @returns {Sequence} The new sequence.
	   *
	   * @examples
	   * var people = [
	   *   { name: 'Bob', age: 25 },
	   *   { name: 'Fred', age: 34 }
	   * ];
	   *
	   * var bob  = people[0],
	   *     fred = people[1];
	   *
	   * Lazy(people).indexBy('name')        // sequence: { 'Bob': bob, 'Fred': fred }
	   * Lazy(people).indexBy('name', 'age') // sequence: { 'Bob': 25, 'Fred': 34 }
	   */
	  Sequence.prototype.indexBy = function(keyFn, valFn) {
	    return new IndexedSequence(this, keyFn, valFn);
	  };

	  /**
	   * @constructor
	   */
	  function IndexedSequence(parent, keyFn, valFn) {
	    this.parent = parent;
	    this.keyFn  = keyFn;
	    this.valFn  = valFn;
	  }

	  // IndexedSequence must have its prototype set after ObjectLikeSequence has
	  // been fully initialized.

	  /**
	   * Creates a new {@link ObjectLikeSequence} containing the unique keys of all
	   * the elements in this sequence, each paired with the number of elements
	   * in this sequence having that key.
	   *
	   * @public
	   * @param {Function|string} keyFn The function to call on the elements in this
	   *     sequence to obtain a key by which to count them, or a string representing
	   *     a parameter to read from all the elements in this sequence.
	   * @returns {Sequence} The new sequence.
	   *
	   * @examples
	   * function oddOrEven(x) {
	   *   return x % 2 === 0 ? 'even' : 'odd';
	   * }
	   *
	   * var numbers = [1, 2, 3, 4, 5];
	   *
	   * Lazy(numbers).countBy(oddOrEven)            // sequence: { odd: 3, even: 2 }
	   * Lazy(numbers).countBy(oddOrEven).get("odd") // => 3
	   * Lazy(numbers).countBy(oddOrEven).get("foo") // => undefined
	   */
	  Sequence.prototype.countBy = function countBy(keyFn) {
	    return new CountedSequence(this, keyFn);
	  };

	  /**
	   * @constructor
	   */
	  function CountedSequence(parent, keyFn) {
	    this.parent = parent;
	    this.keyFn  = keyFn;
	  }

	  // CountedSequence, like GroupedSequence, must have its prototype set after
	  // ObjectLikeSequence has been fully initialized.

	  /**
	   * Creates a new sequence with every unique element from this one appearing
	   * exactly once (i.e., with duplicates removed).
	   *
	   * @public
	   * @aka unique
	   * @param {Function} keyFn An optional function to produce the key for each
	   *     object. This key is then tested for uniqueness as  opposed to the
	   *     object reference.
	   * @returns {Sequence} The new sequence.
	   *
	   * @examples
	   * Lazy([1, 2, 2, 3, 3, 3]).uniq() // sequence: [1, 2, 3]
	   * Lazy([{ name: 'mike' }, 
	   * 	{ name: 'sarah' }, 
	   * 	{ name: 'mike' }
	   * ]).uniq('name')
	   * // sequence: [{ name: 'mike' }, { name: 'sarah' }]
	   *
	   * @benchmarks
	   * function randomOf(array) {
	   *   return function() {
	   *     return array[Math.floor(Math.random() * array.length)];
	   *   };
	   * }
	   *
	   * var mostUnique = Lazy.generate(randomOf(_.range(100)), 100).toArray(),
	   *     someUnique = Lazy.generate(randomOf(_.range(50)), 100).toArray(),
	   *     mostDupes  = Lazy.generate(randomOf(_.range(5)), 100).toArray();
	   *
	   * Lazy(mostUnique).uniq().each(Lazy.noop) // lazy - mostly unique elements
	   * Lazy(someUnique).uniq().each(Lazy.noop) // lazy - some unique elements
	   * Lazy(mostDupes).uniq().each(Lazy.noop)  // lazy - mostly duplicate elements
	   * _.each(_.uniq(mostUnique), _.noop)      // lodash - mostly unique elements
	   * _.each(_.uniq(someUnique), _.noop)      // lodash - some unique elements
	   * _.each(_.uniq(mostDupes), _.noop)       // lodash - mostly duplicate elements
	   */
	  Sequence.prototype.uniq = function uniq(keyFn) {
	    return new UniqueSequence(this, keyFn);
	  };

	  Sequence.prototype.unique = function unique(keyFn) {
	    return this.uniq(keyFn);
	  };

	  /**
	   * @constructor
	   */
	  function UniqueSequence(parent, keyFn) {
	    this.parent = parent;
	    this.keyFn  = keyFn;
	  }

	  UniqueSequence.prototype = new Sequence();

	  UniqueSequence.prototype.each = function each(fn) {
	    var cache = new Set(),
	        keyFn = this.keyFn,
	        i     = 0;

	    if (keyFn) {
	      keyFn = createCallback(keyFn);
	      return this.parent.each(function(e) {
	        if (cache.add(keyFn(e))) {
	          return fn(e, i++);
	        }
	      });

	    } else {
	      return this.parent.each(function(e) {
	        if (cache.add(e)) {
	          return fn(e, i++);
	        }
	      });
	    }
	  };

	  /**
	   * Creates a new sequence by combining the elements from this sequence with
	   * corresponding elements from the specified array(s).
	   *
	   * @public
	   * @param {...Array} var_args One or more arrays of elements to combine with
	   *     those of this sequence.
	   * @returns {Sequence} The new sequence.
	   *
	   * @examples
	   * Lazy([1, 2]).zip([3, 4]) // sequence: [[1, 3], [2, 4]]
	   *
	   * @benchmarks
	   * var smArrL = Lazy.range(10).toArray(),
	   *     smArrR = Lazy.range(10, 20).toArray(),
	   *     lgArrL = Lazy.range(100).toArray(),
	   *     lgArrR = Lazy.range(100, 200).toArray();
	   *
	   * Lazy(smArrL).zip(smArrR).each(Lazy.noop) // lazy - zipping 10-element arrays
	   * Lazy(lgArrL).zip(lgArrR).each(Lazy.noop) // lazy - zipping 100-element arrays
	   * _.each(_.zip(smArrL, smArrR), _.noop)    // lodash - zipping 10-element arrays
	   * _.each(_.zip(lgArrL, lgArrR), _.noop)    // lodash - zipping 100-element arrays
	   */
	  Sequence.prototype.zip = function zip(var_args) {
	    if (arguments.length === 1) {
	      return new SimpleZippedSequence(this, (/** @type {Array} */ var_args));
	    } else {
	      return new ZippedSequence(this, arraySlice.call(arguments, 0));
	    }
	  };

	  /**
	   * @constructor
	   */
	  function ZippedSequence(parent, arrays) {
	    this.parent = parent;
	    this.arrays = arrays;
	  }

	  ZippedSequence.prototype = new Sequence();

	  ZippedSequence.prototype.each = function each(fn) {
	    var arrays = this.arrays,
	        i = 0;
	    this.parent.each(function(e) {
	      var group = [e];
	      for (var j = 0; j < arrays.length; ++j) {
	        if (arrays[j].length > i) {
	          group.push(arrays[j][i]);
	        }
	      }
	      return fn(group, i++);
	    });
	  };

	  /**
	   * Creates a new sequence with the same elements as this one, in a randomized
	   * order.
	   *
	   * @public
	   * @returns {Sequence} The new sequence.
	   *
	   * @examples
	   * Lazy([1, 2, 3, 4, 5]).shuffle().value() // =~ [1, 2, 3, 4, 5]
	   */
	  Sequence.prototype.shuffle = function shuffle() {
	    return new ShuffledSequence(this);
	  };

	  /**
	   * @constructor
	   */
	  function ShuffledSequence(parent) {
	    this.parent = parent;
	  }

	  ShuffledSequence.prototype = new Sequence();

	  ShuffledSequence.prototype.each = function each(fn) {
	    var shuffled = this.parent.toArray(),
	        floor = Math.floor,
	        random = Math.random,
	        j = 0;

	    for (var i = shuffled.length - 1; i > 0; --i) {
	      swap(shuffled, i, floor(random() * (i + 1)));
	      if (fn(shuffled[i], j++) === false) {
	        return;
	      }
	    }
	    fn(shuffled[0], j);
	  };

	  /**
	   * Creates a new sequence with every element from this sequence, and with arrays
	   * exploded so that a sequence of arrays (of arrays) becomes a flat sequence of
	   * values.
	   *
	   * @public
	   * @returns {Sequence} The new sequence.
	   *
	   * @examples
	   * Lazy([1, [2, 3], [4, [5]]]).flatten() // sequence: [1, 2, 3, 4, 5]
	   * Lazy([1, Lazy([2, 3])]).flatten()     // sequence: [1, 2, 3]
	   */
	  Sequence.prototype.flatten = function flatten() {
	    return new FlattenedSequence(this);
	  };

	  /**
	   * @constructor
	   */
	  function FlattenedSequence(parent) {
	    this.parent = parent;
	  }

	  FlattenedSequence.prototype = new Sequence();

	  FlattenedSequence.prototype.each = function each(fn) {
	    var index = 0;

	    return this.parent.each(function recurseVisitor(e) {
	      if (e instanceof Array) {
	        return forEach(e, recurseVisitor);
	      }

	      if (e instanceof Sequence) {
	        return e.each(recurseVisitor);
	      }

	      return fn(e, index++);
	    });
	  };

	  /**
	   * Creates a new sequence with the same elements as this one, except for all
	   * falsy values (`false`, `0`, `""`, `null`, and `undefined`).
	   *
	   * @public
	   * @returns {Sequence} The new sequence.
	   *
	   * @examples
	   * Lazy(["foo", null, "bar", undefined]).compact() // sequence: ["foo", "bar"]
	   */
	  Sequence.prototype.compact = function compact() {
	    return this.filter(function(e) { return !!e; });
	  };

	  /**
	   * Creates a new sequence with all the elements of this sequence that are not
	   * also among the specified arguments.
	   *
	   * @public
	   * @aka difference
	   * @param {...*} var_args The values, or array(s) of values, to be excluded from the
	   *     resulting sequence.
	   * @returns {Sequence} The new sequence.
	   *
	   * @examples
	   * Lazy([1, 2, 3, 4, 5]).without(2, 3)   // sequence: [1, 4, 5]
	   * Lazy([1, 2, 3, 4, 5]).without([4, 5]) // sequence: [1, 2, 3]
	   */
	  Sequence.prototype.without = function without(var_args) {
	    return new WithoutSequence(this, arraySlice.call(arguments, 0));
	  };

	  Sequence.prototype.difference = function difference(var_args) {
	    return this.without.apply(this, arguments);
	  };

	  /**
	   * @constructor
	   */
	  function WithoutSequence(parent, values) {
	    this.parent = parent;
	    this.values = values;
	  }

	  WithoutSequence.prototype = new Sequence();

	  WithoutSequence.prototype.each = function each(fn) {
	    var set = createSet(this.values),
	        i = 0;
	    return this.parent.each(function(e) {
	      if (!set.contains(e)) {
	        return fn(e, i++);
	      }
	    });
	  };

	  /**
	   * Creates a new sequence with all the unique elements either in this sequence
	   * or among the specified arguments.
	   *
	   * @public
	   * @param {...*} var_args The values, or array(s) of values, to be additionally
	   *     included in the resulting sequence.
	   * @returns {Sequence} The new sequence.
	   *
	   * @examples
	   * Lazy(["foo", "bar"]).union([])             // sequence: ["foo", "bar"]
	   * Lazy(["foo", "bar"]).union(["bar", "baz"]) // sequence: ["foo", "bar", "baz"]
	   */
	  Sequence.prototype.union = function union(var_args) {
	    return this.concat(var_args).uniq();
	  };

	  /**
	   * Creates a new sequence with all the elements of this sequence that also
	   * appear among the specified arguments.
	   *
	   * @public
	   * @param {...*} var_args The values, or array(s) of values, in which elements
	   *     from this sequence must also be included to end up in the resulting sequence.
	   * @returns {Sequence} The new sequence.
	   *
	   * @examples
	   * Lazy(["foo", "bar"]).intersection([])             // sequence: []
	   * Lazy(["foo", "bar"]).intersection(["bar", "baz"]) // sequence: ["bar"]
	   */
	  Sequence.prototype.intersection = function intersection(var_args) {
	    if (arguments.length === 1 && arguments[0] instanceof Array) {
	      return new SimpleIntersectionSequence(this, (/** @type {Array} */ var_args));
	    } else {
	      return new IntersectionSequence(this, arraySlice.call(arguments, 0));
	    }
	  };

	  /**
	   * @constructor
	   */
	  function IntersectionSequence(parent, arrays) {
	    this.parent = parent;
	    this.arrays = arrays;
	  }

	  IntersectionSequence.prototype = new Sequence();

	  IntersectionSequence.prototype.each = function each(fn) {
	    var sets = Lazy(this.arrays).map(function(values) {
	      return new UniqueMemoizer(Lazy(values).getIterator());
	    });

	    var setIterator = new UniqueMemoizer(sets.getIterator()),
	        i = 0;

	    return this.parent.each(function(e) {
	      var includedInAll = true;
	      setIterator.each(function(set) {
	        if (!set.contains(e)) {
	          includedInAll = false;
	          return false;
	        }
	      });

	      if (includedInAll) {
	        return fn(e, i++);
	      }
	    });
	  };

	  /**
	   * @constructor
	   */
	  function UniqueMemoizer(iterator) {
	    this.iterator     = iterator;
	    this.set          = new Set();
	    this.memo         = [];
	    this.currentValue = undefined;
	  }

	  UniqueMemoizer.prototype.current = function current() {
	    return this.currentValue;
	  };

	  UniqueMemoizer.prototype.moveNext = function moveNext() {
	    var iterator = this.iterator,
	        set = this.set,
	        memo = this.memo,
	        current;

	    while (iterator.moveNext()) {
	      current = iterator.current();
	      if (set.add(current)) {
	        memo.push(current);
	        this.currentValue = current;
	        return true;
	      }
	    }
	    return false;
	  };

	  UniqueMemoizer.prototype.each = function each(fn) {
	    var memo = this.memo,
	        length = memo.length,
	        i = -1;

	    while (++i < length) {
	      if (fn(memo[i], i) === false) {
	        return false;
	      }
	    }

	    while (this.moveNext()) {
	      if (fn(this.currentValue, i++) === false) {
	        break;
	      }
	    }
	  };

	  UniqueMemoizer.prototype.contains = function contains(e) {
	    if (this.set.contains(e)) {
	      return true;
	    }

	    while (this.moveNext()) {
	      if (this.currentValue === e) {
	        return true;
	      }
	    }

	    return false;
	  };

	  /**
	   * Checks whether every element in this sequence satisfies a given predicate.
	   *
	   * @public
	   * @aka all
	   * @param {Function} predicate A function to call on (potentially) every element
	   *     in this sequence.
	   * @returns {boolean} True if `predicate` returns true for every element in the
	   *     sequence (or the sequence is empty). False if `predicate` returns false
	   *     for at least one element.
	   *
	   * @examples
	   * var numbers = [1, 2, 3, 4, 5];
	   *
	   * var objects = [{ foo: true }, { foo: false, bar: true }];
	   *
	   * Lazy(numbers).every(isEven)     // => false
	   * Lazy(numbers).every(isPositive) // => true
	   * Lazy(objects).all('foo')        // => false
	   * Lazy(objects).all('bar')        // => false
	   */
	  Sequence.prototype.every = function every(predicate) {
	    predicate = createCallback(predicate);

	    return this.each(function(e, i) {
	      return !!predicate(e, i);
	    });
	  };

	  Sequence.prototype.all = function all(predicate) {
	    return this.every(predicate);
	  };

	  /**
	   * Checks whether at least one element in this sequence satisfies a given
	   * predicate (or, if no predicate is specified, whether the sequence contains at
	   * least one element).
	   *
	   * @public
	   * @aka any
	   * @param {Function=} predicate A function to call on (potentially) every element
	   *     in this sequence.
	   * @returns {boolean} True if `predicate` returns true for at least one element
	   *     in the sequence. False if `predicate` returns false for every element (or
	   *     the sequence is empty).
	   *
	   * @examples
	   * var numbers = [1, 2, 3, 4, 5];
	   *
	   * Lazy(numbers).some()           // => true
	   * Lazy(numbers).some(isEven)     // => true
	   * Lazy(numbers).some(isNegative) // => false
	   * Lazy([]).some()                // => false
	   */
	  Sequence.prototype.some = function some(predicate) {
	    predicate = createCallback(predicate, true);

	    var success = false;
	    this.each(function(e) {
	      if (predicate(e)) {
	        success = true;
	        return false;
	      }
	    });
	    return success;
	  };

	  Sequence.prototype.any = function any(predicate) {
	    return this.some(predicate);
	  };

	  /**
	   * Checks whether NO elements in this sequence satisfy the given predicate
	   * (the opposite of {@link Sequence#all}, basically).
	   *
	   * @public
	   * @param {Function=} predicate A function to call on (potentially) every element
	   *     in this sequence.
	   * @returns {boolean} True if `predicate` does not return true for any element
	   *     in the sequence. False if `predicate` returns true for at least one
	   *     element.
	   *
	   * @examples
	   * var numbers = [1, 2, 3, 4, 5];
	   *
	   * Lazy(numbers).none()           // => false
	   * Lazy(numbers).none(isEven)     // => false
	   * Lazy(numbers).none(isNegative) // => true
	   * Lazy([]).none(isEven)          // => true
	   * Lazy([]).none(isNegative)      // => true
	   * Lazy([]).none()                // => true
	   */
	  Sequence.prototype.none = function none(predicate) {
	    return !this.any(predicate);
	  };

	  /**
	   * Checks whether the sequence has no elements.
	   *
	   * @public
	   * @returns {boolean} True if the sequence is empty, false if it contains at
	   *     least one element.
	   *
	   * @examples
	   * Lazy([]).isEmpty()        // => true
	   * Lazy([1, 2, 3]).isEmpty() // => false
	   */
	  Sequence.prototype.isEmpty = function isEmpty() {
	    return !this.any();
	  };

	  /**
	   * Performs (at worst) a linear search from the head of this sequence,
	   * returning the first index at which the specified value is found.
	   *
	   * @public
	   * @param {*} value The element to search for in the sequence.
	   * @returns {number} The index within this sequence where the given value is
	   *     located, or -1 if the sequence doesn't contain the value.
	   *
	   * @examples
	   * function reciprocal(x) { return 1 / x; }
	   *
	   * Lazy(["foo", "bar", "baz"]).indexOf("bar")   // => 1
	   * Lazy([1, 2, 3]).indexOf(4)                   // => -1
	   * Lazy([1, 2, 3]).map(reciprocal).indexOf(0.5) // => 1
	   */
	  Sequence.prototype.indexOf = function indexOf(value) {
	    var foundIndex = -1;
	    this.each(function(e, i) {
	      if (e === value) {
	        foundIndex = i;
	        return false;
	      }
	    });
	    return foundIndex;
	  };

	  /**
	   * Performs (at worst) a linear search from the tail of this sequence,
	   * returning the last index at which the specified value is found.
	   *
	   * @public
	   * @param {*} value The element to search for in the sequence.
	   * @returns {number} The last index within this sequence where the given value
	   *     is located, or -1 if the sequence doesn't contain the value.
	   *
	   * @examples
	   * Lazy(["a", "b", "c", "b", "a"]).lastIndexOf("b")    // => 3
	   * Lazy([1, 2, 3]).lastIndexOf(0)                      // => -1
	   * Lazy([2, 2, 1, 2, 4]).filter(isEven).lastIndexOf(2) // 2
	   */
	  Sequence.prototype.lastIndexOf = function lastIndexOf(value) {
	    var reversed = this.getIndex().reverse(),
	        index    = reversed.indexOf(value);
	    if (index !== -1) {
	      index = reversed.length() - index - 1;
	    }
	    return index;
	  };

	  /**
	   * Performs a binary search of this sequence, returning the lowest index where
	   * the given value is either found, or where it belongs (if it is not already
	   * in the sequence).
	   *
	   * This method assumes the sequence is in sorted order and will fail otherwise.
	   *
	   * @public
	   * @param {*} value The element to search for in the sequence.
	   * @returns {number} An index within this sequence where the given value is
	   *     located, or where it belongs in sorted order.
	   *
	   * @examples
	   * Lazy([1, 3, 6, 9]).sortedIndex(3)                    // => 1
	   * Lazy([1, 3, 6, 9]).sortedIndex(7)                    // => 3
	   * Lazy([5, 10, 15, 20]).filter(isEven).sortedIndex(10) // => 0
	   * Lazy([5, 10, 15, 20]).filter(isEven).sortedIndex(12) // => 1
	   */
	  Sequence.prototype.sortedIndex = function sortedIndex(value) {
	    var indexed = this.getIndex(),
	        lower   = 0,
	        upper   = indexed.length(),
	        i;

	    while (lower < upper) {
	      i = (lower + upper) >>> 1;
	      if (compare(indexed.get(i), value) === -1) {
	        lower = i + 1;
	      } else {
	        upper = i;
	      }
	    }
	    return lower;
	  };

	  /**
	   * Checks whether the given value is in this sequence.
	   *
	   * @public
	   * @param {*} value The element to search for in the sequence.
	   * @returns {boolean} True if the sequence contains the value, false if not.
	   *
	   * @examples
	   * var numbers = [5, 10, 15, 20];
	   *
	   * Lazy(numbers).contains(15) // => true
	   * Lazy(numbers).contains(13) // => false
	   */
	  Sequence.prototype.contains = function contains(value) {
	    return this.indexOf(value) !== -1;
	  };

	  /**
	   * Aggregates a sequence into a single value according to some accumulator
	   * function.
	   *
	   * For an asynchronous sequence, instead of immediately returning a result
	   * (which it can't, obviously), this method returns an {@link AsyncHandle}
	   * whose `onComplete` method can be called to supply a callback to handle the
	   * final result once iteration has completed.
	   *
	   * @public
	   * @aka inject, foldl
	   * @param {Function} aggregator The function through which to pass every element
	   *     in the sequence. For every element, the function will be passed the total
	   *     aggregated result thus far and the element itself, and should return a
	   *     new aggregated result.
	   * @param {*=} memo The starting value to use for the aggregated result
	   *     (defaults to the first element in the sequence).
	   * @returns {*} The result of the aggregation, or, for asynchronous sequences,
	   *     an {@link AsyncHandle} whose `onComplete` method accepts a callback to
	   *     handle the final result.
	   *
	   * @examples
	   * function multiply(x, y) { return x * y; }
	   *
	   * var numbers = [1, 2, 3, 4];
	   *
	   * Lazy(numbers).reduce(multiply)    // => 24
	   * Lazy(numbers).reduce(multiply, 5) // => 120
	   */
	  Sequence.prototype.reduce = function reduce(aggregator, memo) {
	    if (arguments.length < 2) {
	      return this.tail().reduce(aggregator, this.head());
	    }

	    var eachResult = this.each(function(e, i) {
	      memo = aggregator(memo, e, i);
	    });

	    // TODO: Think of a way more efficient solution to this problem.
	    if (eachResult instanceof AsyncHandle) {
	      return eachResult.then(function() { return memo; });
	    }

	    return memo;
	  };

	  Sequence.prototype.inject =
	  Sequence.prototype.foldl = function foldl(aggregator, memo) {
	    return this.reduce(aggregator, memo);
	  };

	  /**
	   * Aggregates a sequence, from the tail, into a single value according to some
	   * accumulator function.
	   *
	   * @public
	   * @aka foldr
	   * @param {Function} aggregator The function through which to pass every element
	   *     in the sequence. For every element, the function will be passed the total
	   *     aggregated result thus far and the element itself, and should return a
	   *     new aggregated result.
	   * @param {*} memo The starting value to use for the aggregated result.
	   * @returns {*} The result of the aggregation.
	   *
	   * @examples
	   * function append(s1, s2) {
	   *   return s1 + s2;
	   * }
	   *
	   * function isVowel(str) {
	   *   return "aeiou".indexOf(str) !== -1;
	   * }
	   *
	   * Lazy("abcde").reduceRight(append)                 // => "edcba"
	   * Lazy("abcde").filter(isVowel).reduceRight(append) // => "ea"
	   */
	  Sequence.prototype.reduceRight = function reduceRight(aggregator, memo) {
	    if (arguments.length < 2) {
	      return this.initial(1).reduceRight(aggregator, this.last());
	    }

	    // This bothers me... but frankly, calling reverse().reduce() is potentially
	    // going to eagerly evaluate the sequence anyway; so it's really not an issue.
	    var indexed = this.getIndex(),
	        i = indexed.length() - 1;
	    return indexed.reverse().reduce(function(m, e) {
	      return aggregator(m, e, i--);
	    }, memo);
	  };

	  Sequence.prototype.foldr = function foldr(aggregator, memo) {
	    return this.reduceRight(aggregator, memo);
	  };

	  /**
	   * Groups this sequence into consecutive (overlapping) segments of a specified
	   * length. If the underlying sequence has fewer elements than the specfied
	   * length, then this sequence will be empty.
	   *
	   * @public
	   * @param {number} length The length of each consecutive segment.
	   * @returns {Sequence} The resulting sequence of consecutive segments.
	   *
	   * @examples
	   * Lazy([]).consecutive(2)        // => sequence: []
	   * Lazy([1]).consecutive(2)       // => sequence: []
	   * Lazy([1, 2]).consecutive(2)    // => sequence: [[1, 2]]
	   * Lazy([1, 2, 3]).consecutive(2) // => sequence: [[1, 2], [2, 3]]
	   * Lazy([1, 2, 3]).consecutive(0) // => sequence: [[]]
	   * Lazy([1, 2, 3]).consecutive(1) // => sequence: [[1], [2], [3]]
	   */
	  Sequence.prototype.consecutive = function consecutive(count) {
	    var queue    = new Queue(count);
	    var segments = this.map(function(element) {
	      if (queue.add(element).count === count) {
	        return queue.toArray();
	      }
	    });
	    return segments.compact();
	  };

	  /**
	   * Breaks this sequence into chunks (arrays) of a specified length.
	   *
	   * @public
	   * @param {number} size The size of each chunk.
	   * @returns {Sequence} The resulting sequence of chunks.
	   *
	   * @examples
	   * Lazy([]).chunk(2)        // sequence: []
	   * Lazy([1, 2, 3]).chunk(2) // sequence: [[1, 2], [3]]
	   * Lazy([1, 2, 3]).chunk(1) // sequence: [[1], [2], [3]]
	   * Lazy([1, 2, 3]).chunk(4) // sequence: [[1, 2, 3]]
	   * Lazy([1, 2, 3]).chunk(0) // throws
	   */
	  Sequence.prototype.chunk = function chunk(size) {
	    if (size < 1) {
	      throw new Error("You must specify a positive chunk size.");
	    }

	    return new ChunkedSequence(this, size);
	  };

	  /**
	   * @constructor
	   */
	  function ChunkedSequence(parent, size) {
	    this.parent    = parent;
	    this.chunkSize = size;
	  }

	  ChunkedSequence.prototype = new Sequence();

	  ChunkedSequence.prototype.getIterator = function getIterator() {
	    return new ChunkedIterator(this.parent, this.chunkSize);
	  };

	  /**
	   * @constructor
	   */
	  function ChunkedIterator(sequence, size) {
	    this.iterator = sequence.getIterator();
	    this.size     = size;
	  }

	  ChunkedIterator.prototype.current = function current() {
	    return this.currentChunk;
	  };

	  ChunkedIterator.prototype.moveNext = function moveNext() {
	    var iterator  = this.iterator,
	        chunkSize = this.size,
	        chunk     = [];

	    while (chunk.length < chunkSize && iterator.moveNext()) {
	      chunk.push(iterator.current());
	    }

	    if (chunk.length === 0) {
	      return false;
	    }

	    this.currentChunk = chunk;
	    return true;
	  };

	  /**
	   * Passes each element in the sequence to the specified callback during
	   * iteration. This is like {@link Sequence#each}, except that it can be
	   * inserted anywhere in the middle of a chain of methods to "intercept" the
	   * values in the sequence at that point.
	   *
	   * @public
	   * @param {Function} callback A function to call on every element in the
	   *     sequence during iteration. The return value of this function does not
	   *     matter.
	   * @returns {Sequence} A sequence comprising the same elements as this one.
	   *
	   * @examples
	   * Lazy([1, 2, 3]).tap(fn).each(Lazy.noop); // calls fn 3 times
	   */
	  Sequence.prototype.tap = function tap(callback) {
	    return new TappedSequence(this, callback);
	  };

	  /**
	   * @constructor
	   */
	  function TappedSequence(parent, callback) {
	    this.parent = parent;
	    this.callback = callback;
	  }

	  TappedSequence.prototype = new Sequence();

	  TappedSequence.prototype.each = function each(fn) {
	    var callback = this.callback;
	    return this.parent.each(function(e, i) {
	      callback(e, i);
	      return fn(e, i);
	    });
	  };

	  /**
	   * Seaches for the first element in the sequence satisfying a given predicate.
	   *
	   * @public
	   * @aka detect
	   * @param {Function} predicate A function to call on (potentially) every element
	   *     in the sequence.
	   * @returns {*} The first element in the sequence for which `predicate` returns
	   *     `true`, or `undefined` if no such element is found.
	   *
	   * @examples
	   * function divisibleBy3(x) {
	   *   return x % 3 === 0;
	   * }
	   *
	   * var numbers = [5, 6, 7, 8, 9, 10];
	   *
	   * Lazy(numbers).find(divisibleBy3) // => 6
	   * Lazy(numbers).find(isNegative)   // => undefined
	   */
	  Sequence.prototype.find = function find(predicate) {
	    return this.filter(predicate).first();
	  };

	  Sequence.prototype.detect = function detect(predicate) {
	    return this.find(predicate);
	  };

	  /**
	   * Gets the minimum value in the sequence.
	   *
	   * @public
	   * @param {Function=} valueFn The function by which the value for comparison is
	   *     calculated for each element in the sequence.
	   * @returns {*} The element with the lowest value in the sequence, or
	   *     `Infinity` if the sequence is empty.
	   *
	   * @examples
	   * function negate(x) { return x * -1; }
	   *
	   * Lazy([]).min()                       // => Infinity
	   * Lazy([6, 18, 2, 49, 34]).min()       // => 2
	   * Lazy([6, 18, 2, 49, 34]).min(negate) // => 49
	   */
	  Sequence.prototype.min = function min(valueFn) {
	    if (typeof valueFn !== "undefined") {
	      return this.minBy(valueFn);
	    }

	    return this.reduce(function(x, y) { return y < x ? y : x; }, Infinity);
	  };

	  Sequence.prototype.minBy = function minBy(valueFn) {
	    valueFn = createCallback(valueFn);
	    return this.reduce(function(x, y) { return valueFn(y) < valueFn(x) ? y : x; });
	  };

	  /**
	   * Gets the maximum value in the sequence.
	   *
	   * @public
	   * @param {Function=} valueFn The function by which the value for comparison is
	   *     calculated for each element in the sequence.
	   * @returns {*} The element with the highest value in the sequence, or
	   *     `-Infinity` if the sequence is empty.
	   *
	   * @examples
	   * function reverseDigits(x) {
	   *   return Number(String(x).split('').reverse().join(''));
	   * }
	   *
	   * Lazy([]).max()                              // => -Infinity
	   * Lazy([6, 18, 2, 48, 29]).max()              // => 48
	   * Lazy([6, 18, 2, 48, 29]).max(reverseDigits) // => 29
	   */
	  Sequence.prototype.max = function max(valueFn) {
	    if (typeof valueFn !== "undefined") {
	      return this.maxBy(valueFn);
	    }

	    return this.reduce(function(x, y) { return y > x ? y : x; }, -Infinity);
	  };

	  Sequence.prototype.maxBy = function maxBy(valueFn) {
	    valueFn = createCallback(valueFn);
	    return this.reduce(function(x, y) { return valueFn(y) > valueFn(x) ? y : x; });
	  };

	  /**
	   * Gets the sum of the values in the sequence.
	   *
	   * @public
	   * @param {Function=} valueFn The function used to select the values that will
	   *     be summed up.
	   * @returns {*} The sum.
	   *
	   * @examples
	   * Lazy([]).sum()                     // => 0
	   * Lazy([1, 2, 3, 4]).sum()           // => 10
	   * Lazy([1.2, 3.4]).sum(Math.floor)   // => 4
	   * Lazy(['foo', 'bar']).sum('length') // => 6
	   */
	  Sequence.prototype.sum = function sum(valueFn) {
	    if (typeof valueFn !== "undefined") {
	      return this.sumBy(valueFn);
	    }

	    return this.reduce(function(x, y) { return x + y; }, 0);
	  };

	  Sequence.prototype.sumBy = function sumBy(valueFn) {
	    valueFn = createCallback(valueFn);
	    return this.reduce(function(x, y) { return x + valueFn(y); }, 0);
	  };

	  /**
	   * Creates a string from joining together all of the elements in this sequence,
	   * separated by the given delimiter.
	   *
	   * @public
	   * @aka toString
	   * @param {string=} delimiter The separator to insert between every element from
	   *     this sequence in the resulting string (defaults to `","`).
	   * @returns {string} The delimited string.
	   *
	   * @examples
	   * Lazy([6, 29, 1984]).join("/")  // => "6/29/1984"
	   * Lazy(["a", "b", "c"]).join()   // => "a,b,c"
	   * Lazy(["a", "b", "c"]).join("") // => "abc"
	   * Lazy([1, 2, 3]).join()         // => "1,2,3"
	   * Lazy([1, 2, 3]).join("")       // => "123"
	   * Lazy(["", "", ""]).join(",")   // => ",,"
	   */
	  Sequence.prototype.join = function join(delimiter) {
	    delimiter = typeof delimiter === "string" ? delimiter : ",";

	    return this.reduce(function(str, e, i) {
	      if (i > 0) {
	        str += delimiter;
	      }
	      return str + e;
	    }, "");
	  };

	  Sequence.prototype.toString = function toString(delimiter) {
	    return this.join(delimiter);
	  };

	  /**
	   * Creates a sequence, with the same elements as this one, that will be iterated
	   * over asynchronously when calling `each`.
	   *
	   * @public
	   * @param {number=} interval The approximate period, in milliseconds, that
	   *     should elapse between each element in the resulting sequence. Omitting
	   *     this argument will result in the fastest possible asynchronous iteration.
	   * @returns {AsyncSequence} The new asynchronous sequence.
	   *
	   * @examples
	   * Lazy([1, 2, 3]).async(100).each(fn) // calls fn 3 times asynchronously
	   */
	  Sequence.prototype.async = function async(interval) {
	    return new AsyncSequence(this, interval);
	  };

	  /**
	   * @constructor
	   */
	  function SimpleIntersectionSequence(parent, array) {
	    this.parent = parent;
	    this.array  = array;
	    this.each   = getEachForIntersection(array);
	  }

	  SimpleIntersectionSequence.prototype = new Sequence();

	  SimpleIntersectionSequence.prototype.eachMemoizerCache = function eachMemoizerCache(fn) {
	    var iterator = new UniqueMemoizer(Lazy(this.array).getIterator()),
	        i = 0;

	    return this.parent.each(function(e) {
	      if (iterator.contains(e)) {
	        return fn(e, i++);
	      }
	    });
	  };

	  SimpleIntersectionSequence.prototype.eachArrayCache = function eachArrayCache(fn) {
	    var array = this.array,
	        find  = arrayContains,
	        i = 0;

	    return this.parent.each(function(e) {
	      if (find(array, e)) {
	        return fn(e, i++);
	      }
	    });
	  };

	  function getEachForIntersection(source) {
	    if (source.length < 40) {
	      return SimpleIntersectionSequence.prototype.eachArrayCache;
	    } else {
	      return SimpleIntersectionSequence.prototype.eachMemoizerCache;
	    }
	  }

	  /**
	   * An optimized version of {@link ZippedSequence}, when zipping a sequence with
	   * only one array.
	   *
	   * @param {Sequence} parent The underlying sequence.
	   * @param {Array} array The array with which to zip the sequence.
	   * @constructor
	   */
	  function SimpleZippedSequence(parent, array) {
	    this.parent = parent;
	    this.array  = array;
	  }

	  SimpleZippedSequence.prototype = new Sequence();

	  SimpleZippedSequence.prototype.each = function each(fn) {
	    var array = this.array;
	    return this.parent.each(function(e, i) {
	      return fn([e, array[i]], i);
	    });
	  };

	  /**
	   * An `ArrayLikeSequence` is a {@link Sequence} that provides random access to
	   * its elements. This extends the API for iterating with the additional methods
	   * {@link #get} and {@link #length}, allowing a sequence to act as a "view" into
	   * a collection or other indexed data source.
	   *
	   * The initial sequence created by wrapping an array with `Lazy(array)` is an
	   * `ArrayLikeSequence`.
	   *
	   * All methods of `ArrayLikeSequence` that conceptually should return
	   * something like a array (with indexed access) return another
	   * `ArrayLikeSequence`, for example:
	   *
	   * - {@link Sequence#map}
	   * - {@link ArrayLikeSequence#slice}
	   * - {@link Sequence#take} and {@link Sequence#drop}
	   * - {@link Sequence#reverse}
	   *
	   * The above is not an exhaustive list. There are also certain other cases
	   * where it might be possible to return an `ArrayLikeSequence` (e.g., calling
	   * {@link Sequence#concat} with a single array argument), but this is not
	   * guaranteed by the API.
	   *
	   * Note that in many cases, it is not possible to provide indexed access
	   * without first performing at least a partial iteration of the underlying
	   * sequence. In these cases an `ArrayLikeSequence` will not be returned:
	   *
	   * - {@link Sequence#filter}
	   * - {@link Sequence#uniq}
	   * - {@link Sequence#union}
	   * - {@link Sequence#intersect}
	   *
	   * etc. The above methods only return ordinary {@link Sequence} objects.
	   *
	   * Defining custom array-like sequences
	   * ------------------------------------
	   *
	   * Creating a custom `ArrayLikeSequence` is essentially the same as creating a
	   * custom {@link Sequence}. You just have a couple more methods you need to
	   * implement: `get` and (optionally) `length`.
	   *
	   * Here's an example. Let's define a sequence type called `OffsetSequence` that
	   * offsets each of its parent's elements by a set distance, and circles back to
	   * the beginning after reaching the end. **Remember**: the initialization
	   * function you pass to {@link #define} should always accept a `parent` as its
	   * first parameter.
	   *
	   *     ArrayLikeSequence.define("offset", {
	   *       init: function(parent, offset) {
	   *         this.offset = offset;
	   *       },
	   *
	   *       get: function(i) {
	   *         return this.parent.get((i + this.offset) % this.parent.length());
	   *       }
	   *     });
	   *
	   * It's worth noting a couple of things here.
	   *
	   * First, Lazy's default implementation of `length` simply returns the parent's
	   * length. In this case, since an `OffsetSequence` will always have the same
	   * number of elements as its parent, that implementation is fine; so we don't
	   * need to override it.
	   *
	   * Second, the default implementation of `each` uses `get` and `length` to
	   * essentially create a `for` loop, which is fine here. If you want to implement
	   * `each` your own way, you can do that; but in most cases (as here), you can
	   * probably just stick with the default.
	   *
	   * So we're already done, after only implementing `get`! Pretty easy, huh?
	   *
	   * Now the `offset` method will be chainable from any `ArrayLikeSequence`. So
	   * for example:
	   *
	   *     Lazy([1, 2, 3]).map(mapFn).offset(3);
	   *
	   * ...will work, but:
	   *
	   *     Lazy([1, 2, 3]).filter(mapFn).offset(3);
	   *
	   * ...will not (because `filter` does not return an `ArrayLikeSequence`).
	   *
	   * (Also, as with the example provided for defining custom {@link Sequence}
	   * types, this example really could have been implemented using a function
	   * already available as part of Lazy.js: in this case, {@link Sequence#map}.)
	   *
	   * @public
	   * @constructor
	   *
	   * @examples
	   * Lazy([1, 2, 3])                    // instanceof Lazy.ArrayLikeSequence
	   * Lazy([1, 2, 3]).map(Lazy.identity) // instanceof Lazy.ArrayLikeSequence
	   * Lazy([1, 2, 3]).take(2)            // instanceof Lazy.ArrayLikeSequence
	   * Lazy([1, 2, 3]).drop(2)            // instanceof Lazy.ArrayLikeSequence
	   * Lazy([1, 2, 3]).reverse()          // instanceof Lazy.ArrayLikeSequence
	   * Lazy([1, 2, 3]).slice(1, 2)        // instanceof Lazy.ArrayLikeSequence
	   */
	  function ArrayLikeSequence() {}

	  ArrayLikeSequence.prototype = new Sequence();

	  /**
	   * Create a new constructor function for a type inheriting from
	   * `ArrayLikeSequence`.
	   *
	   * @public
	   * @param {string|Array.<string>} methodName The name(s) of the method(s) to be
	   *     used for constructing the new sequence. The method will be attached to
	   *     the `ArrayLikeSequence` prototype so that it can be chained with any other
	   *     methods that return array-like sequences.
	   * @param {Object} overrides An object containing function overrides for this
	   *     new sequence type. **Must** include `get`. *May* include `init`,
	   *     `length`, `getIterator`, and `each`. For each function, `this` will be
	   *     the new sequence and `this.parent` will be the source sequence.
	   * @returns {Function} A constructor for a new type inheriting from
	   *     `ArrayLikeSequence`.
	   *
	   * @examples
	   * Lazy.ArrayLikeSequence.define("offset", {
	   *   init: function(offset) {
	   *     this.offset = offset;
	   *   },
	   *
	   *   get: function(i) {
	   *     return this.parent.get((i + this.offset) % this.parent.length());
	   *   }
	   * });
	   *
	   * Lazy([1, 2, 3]).offset(1) // sequence: [2, 3, 1]
	   */
	  ArrayLikeSequence.define = function define(methodName, overrides) {
	    if (!overrides || typeof overrides.get !== 'function') {
	      throw new Error("A custom array-like sequence must implement *at least* get!");
	    }

	    return defineSequenceType(ArrayLikeSequence, methodName, overrides);
	  };

	  /**
	   * Returns the element at the specified index.
	   *
	   * @public
	   * @param {number} i The index to access.
	   * @returns {*} The element.
	   *
	   * @examples
	   * function increment(x) { return x + 1; }
	   *
	   * Lazy([1, 2, 3]).get(1)                // => 2
	   * Lazy([1, 2, 3]).get(-1)               // => undefined
	   * Lazy([1, 2, 3]).map(increment).get(1) // => 3
	   */
	  ArrayLikeSequence.prototype.get = function get(i) {
	    return this.parent.get(i);
	  };

	  /**
	   * Returns the length of the sequence.
	   *
	   * @public
	   * @returns {number} The length.
	   *
	   * @examples
	   * function increment(x) { return x + 1; }
	   *
	   * Lazy([]).length()                       // => 0
	   * Lazy([1, 2, 3]).length()                // => 3
	   * Lazy([1, 2, 3]).map(increment).length() // => 3
	   */
	  ArrayLikeSequence.prototype.length = function length() {
	    return this.parent.length();
	  };

	  /**
	   * Returns the current sequence (since it is already indexed).
	   */
	  ArrayLikeSequence.prototype.getIndex = function getIndex() {
	    return this;
	  };

	  /**
	   * An optimized version of {@link Sequence#getIterator}.
	   */
	  ArrayLikeSequence.prototype.getIterator = function getIterator() {
	    return new IndexedIterator(this);
	  };

	  /**
	   * An optimized version of {@link Iterator} meant to work with already-indexed
	   * sequences.
	   *
	   * @param {ArrayLikeSequence} sequence The sequence to iterate over.
	   * @constructor
	   */
	  function IndexedIterator(sequence) {
	    this.sequence = sequence;
	    this.index    = -1;
	  }

	  IndexedIterator.prototype.current = function current() {
	    return this.sequence.get(this.index);
	  };

	  IndexedIterator.prototype.moveNext = function moveNext() {
	    if (this.index >= this.sequence.length() - 1) {
	      return false;
	    }

	    ++this.index;
	    return true;
	  };

	  /**
	   * An optimized version of {@link Sequence#each}.
	   */
	  ArrayLikeSequence.prototype.each = function each(fn) {
	    var length = this.length(),
	        i = -1;

	    while (++i < length) {
	      if (fn(this.get(i), i) === false) {
	        return false;
	      }
	    }

	    return true;
	  };

	  /**
	   * Returns a new sequence with the same elements as this one, minus the last
	   * element.
	   *
	   * @public
	   * @returns {ArrayLikeSequence} The new array-like sequence.
	   *
	   * @examples
	   * Lazy([1, 2, 3]).pop() // sequence: [1, 2]
	   * Lazy([]).pop()        // sequence: []
	   */
	  ArrayLikeSequence.prototype.pop = function pop() {
	    return this.initial();
	  };

	  /**
	   * Returns a new sequence with the same elements as this one, minus the first
	   * element.
	   *
	   * @public
	   * @returns {ArrayLikeSequence} The new array-like sequence.
	   *
	   * @examples
	   * Lazy([1, 2, 3]).shift() // sequence: [2, 3]
	   * Lazy([]).shift()        // sequence: []
	   */
	  ArrayLikeSequence.prototype.shift = function shift() {
	    return this.drop();
	  };

	  /**
	   * Returns a new sequence comprising the portion of this sequence starting
	   * from the specified starting index and continuing until the specified ending
	   * index or to the end of the sequence.
	   *
	   * @public
	   * @param {number} begin The index at which the new sequence should start.
	   * @param {number=} end The index at which the new sequence should end.
	   * @returns {ArrayLikeSequence} The new array-like sequence.
	   *
	   * @examples
	   * Lazy([1, 2, 3, 4, 5]).slice(0)     // sequence: [1, 2, 3, 4, 5]
	   * Lazy([1, 2, 3, 4, 5]).slice(2)     // sequence: [3, 4, 5]
	   * Lazy([1, 2, 3, 4, 5]).slice(2, 4)  // sequence: [3, 4]
	   * Lazy([1, 2, 3, 4, 5]).slice(-1)    // sequence: [5]
	   * Lazy([1, 2, 3, 4, 5]).slice(1, -1) // sequence: [2, 3, 4]
	   * Lazy([1, 2, 3, 4, 5]).slice(0, 10) // sequence: [1, 2, 3, 4, 5]
	   */
	  ArrayLikeSequence.prototype.slice = function slice(begin, end) {
	    var length = this.length();

	    if (begin < 0) {
	      begin = length + begin;
	    }

	    var result = this.drop(begin);

	    if (typeof end === "number") {
	      if (end < 0) {
	        end = length + end;
	      }
	      result = result.take(end - begin);
	    }

	    return result;
	  };

	  /**
	   * An optimized version of {@link Sequence#map}, which creates an
	   * {@link ArrayLikeSequence} so that the result still provides random access.
	   *
	   * @public
	   *
	   * @examples
	   * Lazy([1, 2, 3]).map(Lazy.identity) // instanceof Lazy.ArrayLikeSequence
	   */
	  ArrayLikeSequence.prototype.map = function map(mapFn) {
	    return new IndexedMappedSequence(this, createCallback(mapFn));
	  };

	  /**
	   * @constructor
	   */
	  function IndexedMappedSequence(parent, mapFn) {
	    this.parent = parent;
	    this.mapFn  = mapFn;
	  }

	  IndexedMappedSequence.prototype = new ArrayLikeSequence();

	  IndexedMappedSequence.prototype.get = function get(i) {
	    if (i < 0 || i >= this.parent.length()) {
	      return undefined;
	    }

	    return this.mapFn(this.parent.get(i), i);
	  };

	  /**
	   * An optimized version of {@link Sequence#filter}.
	   */
	  ArrayLikeSequence.prototype.filter = function filter(filterFn) {
	    return new IndexedFilteredSequence(this, createCallback(filterFn));
	  };

	  /**
	   * @constructor
	   */
	  function IndexedFilteredSequence(parent, filterFn) {
	    this.parent   = parent;
	    this.filterFn = filterFn;
	  }

	  IndexedFilteredSequence.prototype = new FilteredSequence();

	  IndexedFilteredSequence.prototype.each = function each(fn) {
	    var parent = this.parent,
	        filterFn = this.filterFn,
	        length = this.parent.length(),
	        i = -1,
	        j = 0,
	        e;

	    while (++i < length) {
	      e = parent.get(i);
	      if (filterFn(e, i) && fn(e, j++) === false) {
	        return false;
	      }
	    }

	    return true;
	  };

	  /**
	   * An optimized version of {@link Sequence#reverse}, which creates an
	   * {@link ArrayLikeSequence} so that the result still provides random access.
	   *
	   * @public
	   *
	   * @examples
	   * Lazy([1, 2, 3]).reverse() // instanceof Lazy.ArrayLikeSequence
	   */
	  ArrayLikeSequence.prototype.reverse = function reverse() {
	    return new IndexedReversedSequence(this);
	  };

	  /**
	   * @constructor
	   */
	  function IndexedReversedSequence(parent) {
	    this.parent = parent;
	  }

	  IndexedReversedSequence.prototype = new ArrayLikeSequence();

	  IndexedReversedSequence.prototype.get = function get(i) {
	    return this.parent.get(this.length() - i - 1);
	  };

	  /**
	   * An optimized version of {@link Sequence#first}, which creates an
	   * {@link ArrayLikeSequence} so that the result still provides random access.
	   *
	   * @public
	   *
	   * @examples
	   * Lazy([1, 2, 3]).first(2) // instanceof Lazy.ArrayLikeSequence
	   */
	  ArrayLikeSequence.prototype.first = function first(count) {
	    if (typeof count === "undefined") {
	      return this.get(0);
	    }

	    return new IndexedTakeSequence(this, count);
	  };

	  /**
	   * @constructor
	   */
	  function IndexedTakeSequence(parent, count) {
	    this.parent = parent;
	    this.count  = count;
	  }

	  IndexedTakeSequence.prototype = new ArrayLikeSequence();

	  IndexedTakeSequence.prototype.length = function length() {
	    var parentLength = this.parent.length();
	    return this.count <= parentLength ? this.count : parentLength;
	  };

	  /**
	   * An optimized version of {@link Sequence#rest}, which creates an
	   * {@link ArrayLikeSequence} so that the result still provides random access.
	   *
	   * @public
	   *
	   * @examples
	   * Lazy([1, 2, 3]).rest() // instanceof Lazy.ArrayLikeSequence
	   */
	  ArrayLikeSequence.prototype.rest = function rest(count) {
	    return new IndexedDropSequence(this, count);
	  };

	  /**
	   * @constructor
	   */
	  function IndexedDropSequence(parent, count) {
	    this.parent = parent;
	    this.count  = typeof count === "number" ? count : 1;
	  }

	  IndexedDropSequence.prototype = new ArrayLikeSequence();

	  IndexedDropSequence.prototype.get = function get(i) {
	    return this.parent.get(this.count + i);
	  };

	  IndexedDropSequence.prototype.length = function length() {
	    var parentLength = this.parent.length();
	    return this.count <= parentLength ? parentLength - this.count : 0;
	  };

	  /**
	   * An optimized version of {@link Sequence#concat} that returns another
	   * {@link ArrayLikeSequence} *if* the argument is an array.
	   *
	   * @public
	   * @param {...*} var_args
	   *
	   * @examples
	   * Lazy([1, 2]).concat([3, 4]) // instanceof Lazy.ArrayLikeSequence
	   * Lazy([1, 2]).concat([3, 4]) // sequence: [1, 2, 3, 4]
	   */
	  ArrayLikeSequence.prototype.concat = function concat(var_args) {
	    if (arguments.length === 1 && arguments[0] instanceof Array) {
	      return new IndexedConcatenatedSequence(this, (/** @type {Array} */ var_args));
	    } else {
	      return Sequence.prototype.concat.apply(this, arguments);
	    }
	  };

	  /**
	   * @constructor
	   */
	  function IndexedConcatenatedSequence(parent, other) {
	    this.parent = parent;
	    this.other  = other;
	  }

	  IndexedConcatenatedSequence.prototype = new ArrayLikeSequence();

	  IndexedConcatenatedSequence.prototype.get = function get(i) {
	    var parentLength = this.parent.length();
	    if (i < parentLength) {
	      return this.parent.get(i);
	    } else {
	      return this.other[i - parentLength];
	    }
	  };

	  IndexedConcatenatedSequence.prototype.length = function length() {
	    return this.parent.length() + this.other.length;
	  };

	  /**
	   * An optimized version of {@link Sequence#uniq}.
	   */
	  ArrayLikeSequence.prototype.uniq = function uniq(keyFn) {
	    return new IndexedUniqueSequence(this, createCallback(keyFn));
	  };

	  /**
	   * @param {ArrayLikeSequence} parent
	   * @constructor
	   */
	  function IndexedUniqueSequence(parent, keyFn) {
	    this.parent = parent;
	    this.each   = getEachForParent(parent);
	    this.keyFn  = keyFn;
	  }

	  IndexedUniqueSequence.prototype = new Sequence();

	  IndexedUniqueSequence.prototype.eachArrayCache = function eachArrayCache(fn) {
	    // Basically the same implementation as w/ the set, but using an array because
	    // it's cheaper for smaller sequences.
	    var parent = this.parent,
	        keyFn  = this.keyFn,
	        length = parent.length(),
	        cache  = [],
	        find   = arrayContains,
	        key, value,
	        i = -1,
	        j = 0;

	    while (++i < length) {
	      value = parent.get(i);
	      key = keyFn(value);
	      if (!find(cache, key)) {
	        cache.push(key);
	        if (fn(value, j++) === false) {
	          return false;
	        }
	      }
	    }
	  };

	  IndexedUniqueSequence.prototype.eachSetCache = UniqueSequence.prototype.each;

	  function getEachForParent(parent) {
	    if (parent.length() < 100) {
	      return IndexedUniqueSequence.prototype.eachArrayCache;
	    } else {
	      return UniqueSequence.prototype.each;
	    }
	  }

	  // Now that we've fully initialized the ArrayLikeSequence prototype, we can
	  // set the prototype for MemoizedSequence.

	  MemoizedSequence.prototype = new ArrayLikeSequence();

	  MemoizedSequence.prototype.cache = function cache() {
	    return this.cachedResult || (this.cachedResult = this.parent.toArray());
	  };

	  MemoizedSequence.prototype.get = function get(i) {
	    return this.cache()[i];
	  };

	  MemoizedSequence.prototype.length = function length() {
	    return this.cache().length;
	  };

	  MemoizedSequence.prototype.slice = function slice(begin, end) {
	    return this.cache().slice(begin, end);
	  };

	  MemoizedSequence.prototype.toArray = function toArray() {
	    return this.cache().slice(0);
	  };

	  /**
	   * ArrayWrapper is the most basic {@link Sequence}. It directly wraps an array
	   * and implements the same methods as {@link ArrayLikeSequence}, but more
	   * efficiently.
	   *
	   * @constructor
	   */
	  function ArrayWrapper(source) {
	    this.source = source;
	  }

	  ArrayWrapper.prototype = new ArrayLikeSequence();

	  ArrayWrapper.prototype.root = function root() {
	    return this;
	  };

	  ArrayWrapper.prototype.isAsync = function isAsync() {
	    return false;
	  };

	  /**
	   * Returns the element at the specified index in the source array.
	   *
	   * @param {number} i The index to access.
	   * @returns {*} The element.
	   */
	  ArrayWrapper.prototype.get = function get(i) {
	    return this.source[i];
	  };

	  /**
	   * Returns the length of the source array.
	   *
	   * @returns {number} The length.
	   */
	  ArrayWrapper.prototype.length = function length() {
	    return this.source.length;
	  };

	  /**
	   * An optimized version of {@link Sequence#each}.
	   */
	  ArrayWrapper.prototype.each = function each(fn) {
	    return forEach(this.source, fn);
	  };

	  /**
	   * An optimized version of {@link Sequence#map}.
	   */
	  ArrayWrapper.prototype.map = function map(mapFn) {
	    return new MappedArrayWrapper(this, createCallback(mapFn));
	  };

	  /**
	   * An optimized version of {@link Sequence#filter}.
	   */
	  ArrayWrapper.prototype.filter = function filter(filterFn) {
	    return new FilteredArrayWrapper(this, createCallback(filterFn));
	  };

	  /**
	   * An optimized version of {@link Sequence#uniq}.
	   */
	  ArrayWrapper.prototype.uniq = function uniq(keyFn) {
	    return new UniqueArrayWrapper(this, keyFn);
	  };

	  /**
	   * An optimized version of {@link ArrayLikeSequence#concat}.
	   *
	   * @param {...*} var_args
	   */
	  ArrayWrapper.prototype.concat = function concat(var_args) {
	    if (arguments.length === 1 && arguments[0] instanceof Array) {
	      return new ConcatArrayWrapper(this, (/** @type {Array} */ var_args));
	    } else {
	      return ArrayLikeSequence.prototype.concat.apply(this, arguments);
	    }
	  };

	  /**
	   * An optimized version of {@link Sequence#toArray}.
	   */
	  ArrayWrapper.prototype.toArray = function toArray() {
	    return this.source.slice(0);
	  };

	  /**
	   * @constructor
	   */
	  function MappedArrayWrapper(parent, mapFn) {
	    this.parent = parent;
	    this.mapFn  = mapFn;
	  }

	  MappedArrayWrapper.prototype = new ArrayLikeSequence();

	  MappedArrayWrapper.prototype.get = function get(i) {
	    var source = this.parent.source;

	    if (i < 0 || i >= source.length) {
	      return undefined;
	    }

	    return this.mapFn(source[i]);
	  };

	  MappedArrayWrapper.prototype.length = function length() {
	    return this.parent.source.length;
	  };

	  MappedArrayWrapper.prototype.each = function each(fn) {
	    var source = this.parent.source,
	        length = source.length,
	        mapFn  = this.mapFn,
	        i = -1;

	    while (++i < length) {
	      if (fn(mapFn(source[i], i), i) === false) {
	        return false;
	      }
	    }

	    return true;
	  };

	  /**
	   * @constructor
	   */
	  function FilteredArrayWrapper(parent, filterFn) {
	    this.parent   = parent;
	    this.filterFn = filterFn;
	  }

	  FilteredArrayWrapper.prototype = new FilteredSequence();

	  FilteredArrayWrapper.prototype.each = function each(fn) {
	    var source = this.parent.source,
	        filterFn = this.filterFn,
	        length = source.length,
	        i = -1,
	        j = 0,
	        e;

	    while (++i < length) {
	      e = source[i];
	      if (filterFn(e, i) && fn(e, j++) === false) {
	        return false;
	      }
	    }

	    return true;
	  };

	  /**
	   * @constructor
	   */
	  function UniqueArrayWrapper(parent, keyFn) {
	    this.parent = parent;
	    this.each   = getEachForSource(parent.source);
	    this.keyFn  = keyFn;
	  }

	  UniqueArrayWrapper.prototype = new Sequence();

	  UniqueArrayWrapper.prototype.eachNoCache = function eachNoCache(fn) {
	    var source = this.parent.source,
	        keyFn  = this.keyFn,
	        length = source.length,
	        find   = arrayContainsBefore,
	        value,

	        // Yes, this is hideous.
	        // Trying to get performance first, will refactor next!
	        i = -1,
	        k = 0;

	    while (++i < length) {
	      value = source[i];
	      if (!find(source, value, i, keyFn) && fn(value, k++) === false) {
	        return false;
	      }
	    }

	    return true;
	  };

	  UniqueArrayWrapper.prototype.eachArrayCache = function eachArrayCache(fn) {
	    // Basically the same implementation as w/ the set, but using an array because
	    // it's cheaper for smaller sequences.
	    var source = this.parent.source,
	        keyFn  = this.keyFn,
	        length = source.length,
	        cache  = [],
	        find   = arrayContains,
	        key, value,
	        i = -1,
	        j = 0;

	    if (keyFn) {
	      keyFn = createCallback(keyFn);
	      while (++i < length) {
	        value = source[i];
	        key = keyFn(value);
	        if (!find(cache, key)) {
	          cache.push(key);
	          if (fn(value, j++) === false) {
	            return false;
	          }
	        }
	      }

	    } else {
	      while (++i < length) {
	        value = source[i];
	        if (!find(cache, value)) {
	          cache.push(value);
	          if (fn(value, j++) === false) {
	            return false;
	          }
	        }
	      }
	    }

	    return true;
	  };

	  UniqueArrayWrapper.prototype.eachSetCache = UniqueSequence.prototype.each;

	  /**
	   * My latest findings here...
	   *
	   * So I hadn't really given the set-based approach enough credit. The main issue
	   * was that my Set implementation was totally not optimized at all. After pretty
	   * heavily optimizing it (just take a look; it's a monstrosity now!), it now
	   * becomes the fastest option for much smaller values of N.
	   */
	  function getEachForSource(source) {
	    if (source.length < 40) {
	      return UniqueArrayWrapper.prototype.eachNoCache;
	    } else if (source.length < 100) {
	      return UniqueArrayWrapper.prototype.eachArrayCache;
	    } else {
	      return UniqueArrayWrapper.prototype.eachSetCache;
	    }
	  }

	  /**
	   * @constructor
	   */
	  function ConcatArrayWrapper(parent, other) {
	    this.parent = parent;
	    this.other  = other;
	  }

	  ConcatArrayWrapper.prototype = new ArrayLikeSequence();

	  ConcatArrayWrapper.prototype.get = function get(i) {
	    var source = this.parent.source,
	        sourceLength = source.length;

	    if (i < sourceLength) {
	      return source[i];
	    } else {
	      return this.other[i - sourceLength];
	    }
	  };

	  ConcatArrayWrapper.prototype.length = function length() {
	    return this.parent.source.length + this.other.length;
	  };

	  ConcatArrayWrapper.prototype.each = function each(fn) {
	    var source = this.parent.source,
	        sourceLength = source.length,
	        other = this.other,
	        otherLength = other.length,
	        i = 0,
	        j = -1;

	    while (++j < sourceLength) {
	      if (fn(source[j], i++) === false) {
	        return false;
	      }
	    }

	    j = -1;
	    while (++j < otherLength) {
	      if (fn(other[j], i++) === false) {
	        return false;
	      }
	    }

	    return true;
	  };

	  /**
	   * An `ObjectLikeSequence` object represents a sequence of key/value pairs.
	   *
	   * The initial sequence you get by wrapping an object with `Lazy(object)` is
	   * an `ObjectLikeSequence`.
	   *
	   * All methods of `ObjectLikeSequence` that conceptually should return
	   * something like an object return another `ObjectLikeSequence`.
	   *
	   * @public
	   * @constructor
	   *
	   * @examples
	   * var obj = { foo: 'bar' };
	   *
	   * Lazy(obj).assign({ bar: 'baz' })   // instanceof Lazy.ObjectLikeSequence
	   * Lazy(obj).defaults({ bar: 'baz' }) // instanceof Lazy.ObjectLikeSequence
	   * Lazy(obj).invert()                 // instanceof Lazy.ObjectLikeSequence
	   */
	  function ObjectLikeSequence() {}

	  ObjectLikeSequence.prototype = new Sequence();

	  /**
	   * Create a new constructor function for a type inheriting from
	   * `ObjectLikeSequence`.
	   *
	   * @public
	   * @param {string|Array.<string>} methodName The name(s) of the method(s) to be
	   *     used for constructing the new sequence. The method will be attached to
	   *     the `ObjectLikeSequence` prototype so that it can be chained with any other
	   *     methods that return object-like sequences.
	   * @param {Object} overrides An object containing function overrides for this
	   *     new sequence type. **Must** include `each`. *May* include `init` and
	   *     `get` (for looking up an element by key).
	   * @returns {Function} A constructor for a new type inheriting from
	   *     `ObjectLikeSequence`.
	   *
	   * @examples
	   * function downcaseKey(value, key) {
	   *   return [key.toLowerCase(), value];
	   * }
	   *
	   * Lazy.ObjectLikeSequence.define("caseInsensitive", {
	   *   init: function() {
	   *     var downcased = this.parent
	   *       .map(downcaseKey)
	   *       .toObject();
	   *     this.downcased = Lazy(downcased);
	   *   },
	   *
	   *   get: function(key) {
	   *     return this.downcased.get(key.toLowerCase());
	   *   },
	   *
	   *   each: function(fn) {
	   *     return this.downcased.each(fn);
	   *   }
	   * });
	   *
	   * Lazy({ Foo: 'bar' }).caseInsensitive()            // sequence: { foo: 'bar' }
	   * Lazy({ FOO: 'bar' }).caseInsensitive().get('foo') // => 'bar'
	   * Lazy({ FOO: 'bar' }).caseInsensitive().get('FOO') // => 'bar'
	   */
	  ObjectLikeSequence.define = function define(methodName, overrides) {
	    if (!overrides || typeof overrides.each !== 'function') {
	      throw new Error("A custom object-like sequence must implement *at least* each!");
	    }

	    return defineSequenceType(ObjectLikeSequence, methodName, overrides);
	  };

	  ObjectLikeSequence.prototype.value = function value() {
	    return this.toObject();
	  };

	  /**
	   * Gets the element at the specified key in this sequence.
	   *
	   * @public
	   * @param {string} key The key.
	   * @returns {*} The element.
	   *
	   * @examples
	   * Lazy({ foo: "bar" }).get("foo")                          // => "bar"
	   * Lazy({ foo: "bar" }).extend({ foo: "baz" }).get("foo")   // => "baz"
	   * Lazy({ foo: "bar" }).defaults({ bar: "baz" }).get("bar") // => "baz"
	   * Lazy({ foo: "bar" }).invert().get("bar")                 // => "foo"
	   * Lazy({ foo: 1, bar: 2 }).pick(["foo"]).get("foo")        // => 1
	   * Lazy({ foo: 1, bar: 2 }).pick(["foo"]).get("bar")        // => undefined
	   * Lazy({ foo: 1, bar: 2 }).omit(["foo"]).get("bar")        // => 2
	   * Lazy({ foo: 1, bar: 2 }).omit(["foo"]).get("foo")        // => undefined
	   */
	  ObjectLikeSequence.prototype.get = function get(key) {
	    var pair = this.pairs().find(function(pair) {
	      return pair[0] === key;
	    });

	    return pair ? pair[1] : undefined;
	  };

	  /**
	   * Returns a {@link Sequence} whose elements are the keys of this object-like
	   * sequence.
	   *
	   * @public
	   * @returns {Sequence} The sequence based on this sequence's keys.
	   *
	   * @examples
	   * Lazy({ hello: "hola", goodbye: "hasta luego" }).keys() // sequence: ["hello", "goodbye"]
	   */
	  ObjectLikeSequence.prototype.keys = function keys() {
	    return this.map(function(v, k) { return k; });
	  };

	  /**
	   * Returns a {@link Sequence} whose elements are the values of this object-like
	   * sequence.
	   *
	   * @public
	   * @returns {Sequence} The sequence based on this sequence's values.
	   *
	   * @examples
	   * Lazy({ hello: "hola", goodbye: "hasta luego" }).values() // sequence: ["hola", "hasta luego"]
	   */
	  ObjectLikeSequence.prototype.values = function values() {
	    return this.map(function(v, k) { return v; });
	  };

	  /**
	   * Throws an exception. Asynchronous iteration over object-like sequences is
	   * not supported.
	   *
	   * @public
	   * @examples
	   * Lazy({ foo: 'bar' }).async() // throws
	   */
	  ObjectLikeSequence.prototype.async = function async() {
	    throw new Error('An ObjectLikeSequence does not support asynchronous iteration.');
	  };

	  ObjectLikeSequence.prototype.filter = function filter(filterFn) {
	    return new FilteredObjectLikeSequence(this, createCallback(filterFn));
	  };

	  function FilteredObjectLikeSequence(parent, filterFn) {
	    this.parent = parent;
	    this.filterFn = filterFn;
	  }

	  FilteredObjectLikeSequence.prototype = new ObjectLikeSequence();

	  FilteredObjectLikeSequence.prototype.each = function each(fn) {
	    var filterFn = this.filterFn;

	    return this.parent.each(function(v, k) {
	      if (filterFn(v, k)) {
	        return fn(v, k);
	      }
	    });
	  };

	  /**
	   * Returns this same sequence. (Reversing an object-like sequence doesn't make
	   * any sense.)
	   */
	  ObjectLikeSequence.prototype.reverse = function reverse() {
	    return this;
	  };

	  /**
	   * Returns an {@link ObjectLikeSequence} whose elements are the combination of
	   * this sequence and another object. In the case of a key appearing in both this
	   * sequence and the given object, the other object's value will override the
	   * one in this sequence.
	   *
	   * @public
	   * @aka extend
	   * @param {Object} other The other object to assign to this sequence.
	   * @returns {ObjectLikeSequence} A new sequence comprising elements from this
	   *     sequence plus the contents of `other`.
	   *
	   * @examples
	   * Lazy({ "uno": 1, "dos": 2 }).assign({ "tres": 3 }) // sequence: { uno: 1, dos: 2, tres: 3 }
	   * Lazy({ foo: "bar" }).assign({ foo: "baz" });       // sequence: { foo: "baz" }
	   */
	  ObjectLikeSequence.prototype.assign = function assign(other) {
	    return new AssignSequence(this, other);
	  };

	  ObjectLikeSequence.prototype.extend = function extend(other) {
	    return this.assign(other);
	  };

	  /**
	   * @constructor
	   */
	  function AssignSequence(parent, other) {
	    this.parent = parent;
	    this.other  = other;
	  }

	  AssignSequence.prototype = new ObjectLikeSequence();

	  AssignSequence.prototype.get = function get(key) {
	    return this.other[key] || this.parent.get(key);
	  };

	  AssignSequence.prototype.each = function each(fn) {
	    var merged = new Set(),
	        done   = false;

	    Lazy(this.other).each(function(value, key) {
	      if (fn(value, key) === false) {
	        done = true;
	        return false;
	      }

	      merged.add(key);
	    });

	    if (!done) {
	      return this.parent.each(function(value, key) {
	        if (!merged.contains(key) && fn(value, key) === false) {
	          return false;
	        }
	      });
	    }
	  };

	  /**
	   * Returns an {@link ObjectLikeSequence} whose elements are the combination of
	   * this sequence and a 'default' object. In the case of a key appearing in both
	   * this sequence and the given object, this sequence's value will override the
	   * default object's.
	   *
	   * @public
	   * @param {Object} defaults The 'default' object to use for missing keys in this
	   *     sequence.
	   * @returns {ObjectLikeSequence} A new sequence comprising elements from this
	   *     sequence supplemented by the contents of `defaults`.
	   *
	   * @examples
	   * Lazy({ name: "Dan" }).defaults({ name: "User", password: "passw0rd" }) // sequence: { name: "Dan", password: "passw0rd" }
	   */
	  ObjectLikeSequence.prototype.defaults = function defaults(defaults) {
	    return new DefaultsSequence(this, defaults);
	  };

	  /**
	   * @constructor
	   */
	  function DefaultsSequence(parent, defaults) {
	    this.parent   = parent;
	    this.defaults = defaults;
	  }

	  DefaultsSequence.prototype = new ObjectLikeSequence();

	  DefaultsSequence.prototype.get = function get(key) {
	    return this.parent.get(key) || this.defaults[key];
	  };

	  DefaultsSequence.prototype.each = function each(fn) {
	    var merged = new Set(),
	        done   = false;

	    this.parent.each(function(value, key) {
	      if (fn(value, key) === false) {
	        done = true;
	        return false;
	      }

	      if (typeof value !== "undefined") {
	        merged.add(key);
	      }
	    });

	    if (!done) {
	      Lazy(this.defaults).each(function(value, key) {
	        if (!merged.contains(key) && fn(value, key) === false) {
	          return false;
	        }
	      });
	    }
	  };

	  /**
	   * Returns an {@link ObjectLikeSequence} whose values are this sequence's keys,
	   * and whose keys are this sequence's values.
	   *
	   * @public
	   * @returns {ObjectLikeSequence} A new sequence comprising the inverted keys and
	   *     values from this sequence.
	   *
	   * @examples
	   * Lazy({ first: "Dan", last: "Tao" }).invert() // sequence: { Dan: "first", Tao: "last" }
	   */
	  ObjectLikeSequence.prototype.invert = function invert() {
	    return new InvertedSequence(this);
	  };

	  /**
	   * @constructor
	   */
	  function InvertedSequence(parent) {
	    this.parent = parent;
	  }

	  InvertedSequence.prototype = new ObjectLikeSequence();

	  InvertedSequence.prototype.each = function each(fn) {
	    this.parent.each(function(value, key) {
	      return fn(key, value);
	    });
	  };

	  /**
	   * Produces an {@link ObjectLikeSequence} consisting of all the recursively
	   * merged values from this and the given object(s) or sequence(s).
	   *
	   * Note that by default this method only merges "vanilla" objects (bags of
	   * key/value pairs), not arrays or any other custom object types. To customize
	   * how merging works, you can provide the mergeFn argument, e.g. to handling
	   * merging arrays, strings, or other types of objects.
	   *
	   * @public
	   * @param {...Object|ObjectLikeSequence} others The other object(s) or
	   *     sequence(s) whose values will be merged into this one.
	   * @param {Function=} mergeFn An optional function used to customize merging
	   *     behavior. The function should take two values as parameters and return
	   *     whatever the "merged" form of those values is. If the function returns
	   *     undefined then the new value will simply replace the old one in the
	   *     final result.
	   * @returns {ObjectLikeSequence} The new sequence consisting of merged values.
	   *
	   * @examples
	   * // These examples are completely stolen from Lo-Dash's documentation:
	   * // lodash.com/docs#merge
	   *
	   * var names = {
	   *   'characters': [
	   *     { 'name': 'barney' },
	   *     { 'name': 'fred' }
	   *   ]
	   * };
	   *
	   * var ages = {
	   *   'characters': [
	   *     { 'age': 36 },
	   *     { 'age': 40 }
	   *   ]
	   * };
	   *
	   * var food = {
	   *   'fruits': ['apple'],
	   *   'vegetables': ['beet']
	   * };
	   *
	   * var otherFood = {
	   *   'fruits': ['banana'],
	   *   'vegetables': ['carrot']
	   * };
	   *
	   * function mergeArrays(a, b) {
	   *   return Array.isArray(a) ? a.concat(b) : undefined;
	   * }
	   *
	   * Lazy(names).merge(ages); // => sequence: { 'characters': [{ 'name': 'barney', 'age': 36 }, { 'name': 'fred', 'age': 40 }] }
	   * Lazy(food).merge(otherFood, mergeArrays); // => sequence: { 'fruits': ['apple', 'banana'], 'vegetables': ['beet', 'carrot'] }
	   *
	   * // ----- Now for my own tests: -----
	   *
	   * // merges objects
	   * Lazy({ foo: 1 }).merge({ foo: 2 }); // => sequence: { foo: 2 }
	   * Lazy({ foo: 1 }).merge({ bar: 2 }); // => sequence: { foo: 1, bar: 2 }
	   *
	   * // goes deep
	   * Lazy({ foo: { bar: 1 } }).merge({ foo: { bar: 2 } }); // => sequence: { foo: { bar: 2 } }
	   * Lazy({ foo: { bar: 1 } }).merge({ foo: { baz: 2 } }); // => sequence: { foo: { bar: 1, baz: 2 } }
	   * Lazy({ foo: { bar: 1 } }).merge({ foo: { baz: 2 } }); // => sequence: { foo: { bar: 1, baz: 2 } }
	   *
	   * // gives precedence to later sources
	   * Lazy({ foo: 1 }).merge({ bar: 2 }, { bar: 3 }); // => sequence: { foo: 1, bar: 3 }
	   *
	   * // undefined gets passed over
	   * Lazy({ foo: 1 }).merge({ foo: undefined }); // => sequence: { foo: 1 }
	   *
	   * // null doesn't get passed over
	   * Lazy({ foo: 1 }).merge({ foo: null }); // => sequence: { foo: null }
	   *
	   * // array contents get merged as well
	   * Lazy({ foo: [{ bar: 1 }] }).merge({ foo: [{ baz: 2 }] }); // => sequence: { foo: [{ bar: 1, baz: 2}] }
	   */
	  ObjectLikeSequence.prototype.merge = function merge(var_args) {
	    var mergeFn = arguments.length > 1 && typeof arguments[arguments.length - 1] === "function" ?
	      arrayPop.call(arguments) : null;
	    return new MergedSequence(this, arraySlice.call(arguments, 0), mergeFn);
	  };

	  /**
	   * @constructor
	   */
	  function MergedSequence(parent, others, mergeFn) {
	    this.parent  = parent;
	    this.others  = others;
	    this.mergeFn = mergeFn;
	  }

	  MergedSequence.prototype = new ObjectLikeSequence();

	  MergedSequence.prototype.each = function each(fn) {
	    var others  = this.others,
	        mergeFn = this.mergeFn || mergeObjects,
	        keys    = {};

	    var iteratedFullSource = this.parent.each(function(value, key) {
	      var merged = value;

	      forEach(others, function(other) {
	        if (key in other) {
	          merged = mergeFn(merged, other[key]);
	        }
	      });

	      keys[key] = true;

	      return fn(merged, key);
	    });

	    if (iteratedFullSource === false) {
	      return false;
	    }

	    var remaining = {};

	    forEach(others, function(other) {
	      for (var k in other) {
	        if (!keys[k]) {
	          remaining[k] = mergeFn(remaining[k], other[k]);
	        }
	      }
	    });

	    return Lazy(remaining).each(fn);
	  };

	  /**
	   * @private
	   * @examples
	   * mergeObjects({ foo: 1 }, { bar: 2 }); // => { foo: 1, bar: 2 }
	   * mergeObjects({ foo: { bar: 1 } }, { foo: { baz: 2 } }); // => { foo: { bar: 1, baz: 2 } }
	   * mergeObjects({ foo: { bar: 1 } }, { foo: undefined }); // => { foo: { bar: 1 } }
	   * mergeObjects({ foo: { bar: 1 } }, { foo: null }); // => { foo: null }
	   * mergeObjects({ array: [0, 1, 2] }, { array: [3, 4, 5] }).array; // instanceof Array
	   * mergeObjects({ date: new Date() }, { date: new Date() }).date; // instanceof Date
	   * mergeObjects([{ foo: 1 }], [{ bar: 2 }]); // => [{ foo: 1, bar: 2 }]
	   */
	  function mergeObjects(a, b) {
	    var merged, prop;

	    if (typeof b === 'undefined') {
	      return a;
	    }

	    // Check that we're dealing with two objects or two arrays.
	    if (isVanillaObject(a) && isVanillaObject(b)) {
	      merged = {};
	    } else if (a instanceof Array && b instanceof Array) {
	      merged = [];
	    } else {
	      // Otherwise there's no merging to do -- just replace a w/ b.
	      return b;
	    }

	    for (prop in a) {
	      merged[prop] = mergeObjects(a[prop], b[prop]);
	    }
	    for (prop in b) {
	      if (!merged[prop]) {
	        merged[prop] = b[prop];
	      }
	    }
	    return merged;
	  }

	  /**
	   * Checks whether an object is a "vanilla" object, i.e. {'foo': 'bar'} as
	   * opposed to an array, date, etc.
	   *
	   * @private
	   * @examples
	   * isVanillaObject({foo: 'bar'}); // => true
	   * isVanillaObject(new Date());   // => false
	   * isVanillaObject([1, 2, 3]);    // => false
	   */
	  function isVanillaObject(object) {
	    return object && object.constructor === Object;
	  }

	  /**
	   * Creates a {@link Sequence} consisting of the keys from this sequence whose
	   *     values are functions.
	   *
	   * @public
	   * @aka methods
	   * @returns {Sequence} The new sequence.
	   *
	   * @examples
	   * var dog = {
	   *   name: "Fido",
	   *   breed: "Golden Retriever",
	   *   bark: function() { console.log("Woof!"); },
	   *   wagTail: function() { console.log("TODO: implement robotic dog interface"); }
	   * };
	   *
	   * Lazy(dog).functions() // sequence: ["bark", "wagTail"]
	   */
	  ObjectLikeSequence.prototype.functions = function functions() {
	    return this
	      .filter(function(v, k) { return typeof(v) === "function"; })
	      .map(function(v, k) { return k; });
	  };

	  ObjectLikeSequence.prototype.methods = function methods() {
	    return this.functions();
	  };

	  /**
	   * Creates an {@link ObjectLikeSequence} consisting of the key/value pairs from
	   * this sequence whose keys are included in the given array of property names.
	   *
	   * @public
	   * @param {Array} properties An array of the properties to "pick" from this
	   *     sequence.
	   * @returns {ObjectLikeSequence} The new sequence.
	   *
	   * @examples
	   * var players = {
	   *   "who": "first",
	   *   "what": "second",
	   *   "i don't know": "third"
	   * };
	   *
	   * Lazy(players).pick(["who", "what"]) // sequence: { who: "first", what: "second" }
	   */
	  ObjectLikeSequence.prototype.pick = function pick(properties) {
	    return new PickSequence(this, properties);
	  };

	  /**
	   * @constructor
	   */
	  function PickSequence(parent, properties) {
	    this.parent     = parent;
	    this.properties = properties;
	  }

	  PickSequence.prototype = new ObjectLikeSequence();

	  PickSequence.prototype.get = function get(key) {
	    return arrayContains(this.properties, key) ? this.parent.get(key) : undefined;
	  };

	  PickSequence.prototype.each = function each(fn) {
	    var inArray    = arrayContains,
	        properties = this.properties;

	    return this.parent.each(function(value, key) {
	      if (inArray(properties, key)) {
	        return fn(value, key);
	      }
	    });
	  };

	  /**
	   * Creates an {@link ObjectLikeSequence} consisting of the key/value pairs from
	   * this sequence excluding those with the specified keys.
	   *
	   * @public
	   * @param {Array} properties An array of the properties to *omit* from this
	   *     sequence.
	   * @returns {ObjectLikeSequence} The new sequence.
	   *
	   * @examples
	   * var players = {
	   *   "who": "first",
	   *   "what": "second",
	   *   "i don't know": "third"
	   * };
	   *
	   * Lazy(players).omit(["who", "what"]) // sequence: { "i don't know": "third" }
	   */
	  ObjectLikeSequence.prototype.omit = function omit(properties) {
	    return new OmitSequence(this, properties);
	  };

	  /**
	   * @constructor
	   */
	  function OmitSequence(parent, properties) {
	    this.parent     = parent;
	    this.properties = properties;
	  }

	  OmitSequence.prototype = new ObjectLikeSequence();

	  OmitSequence.prototype.get = function get(key) {
	    return arrayContains(this.properties, key) ? undefined : this.parent.get(key);
	  };

	  OmitSequence.prototype.each = function each(fn) {
	    var inArray    = arrayContains,
	        properties = this.properties;

	    return this.parent.each(function(value, key) {
	      if (!inArray(properties, key)) {
	        return fn(value, key);
	      }
	    });
	  };

	  /**
	   * Maps the key/value pairs in this sequence to arrays.
	   *
	   * @public
	   * @aka toArray
	   * @returns {Sequence} An sequence of `[key, value]` pairs.
	   *
	   * @examples
	   * var colorCodes = {
	   *   red: "#f00",
	   *   green: "#0f0",
	   *   blue: "#00f"
	   * };
	   *
	   * Lazy(colorCodes).pairs() // sequence: [["red", "#f00"], ["green", "#0f0"], ["blue", "#00f"]]
	   */
	  ObjectLikeSequence.prototype.pairs = function pairs() {
	    return this.map(function(v, k) { return [k, v]; });
	  };

	  /**
	   * Creates an array from the key/value pairs in this sequence.
	   *
	   * @public
	   * @returns {Array} An array of `[key, value]` elements.
	   *
	   * @examples
	   * var colorCodes = {
	   *   red: "#f00",
	   *   green: "#0f0",
	   *   blue: "#00f"
	   * };
	   *
	   * Lazy(colorCodes).toArray() // => [["red", "#f00"], ["green", "#0f0"], ["blue", "#00f"]]
	   */
	  ObjectLikeSequence.prototype.toArray = function toArray() {
	    return this.pairs().toArray();
	  };

	  /**
	   * Creates an object with the key/value pairs from this sequence.
	   *
	   * @public
	   * @returns {Object} An object with the same key/value pairs as this sequence.
	   *
	   * @examples
	   * var colorCodes = {
	   *   red: "#f00",
	   *   green: "#0f0",
	   *   blue: "#00f"
	   * };
	   *
	   * Lazy(colorCodes).toObject() // => { red: "#f00", green: "#0f0", blue: "#00f" }
	   */
	  ObjectLikeSequence.prototype.toObject = function toObject() {
	    return this.reduce(function(object, value, key) {
	      object[key] = value;
	      return object;
	    }, {});
	  };

	  // Now that we've fully initialized the ObjectLikeSequence prototype, we can
	  // actually set the prototypes for GroupedSequence, IndexedSequence, and
	  // CountedSequence.

	  GroupedSequence.prototype = new ObjectLikeSequence();

	  GroupedSequence.prototype.each = function each(fn) {
	    var keyFn   = createCallback(this.keyFn),
	        valFn   = createCallback(this.valFn),
	        result;

	    result = this.parent.reduce(function(grouped,e) {
	      var key = keyFn(e),
	          val = valFn(e);
	      if (!(grouped[key] instanceof Array)) {
	        grouped[key] = [val];
	      } else {
	        grouped[key].push(val);
	      }
	      return grouped;
	    },{});

	    return transform(function(grouped) {
	      for (var key in grouped) {
	        if (fn(grouped[key], key) === false) {
	          return false;
	        }
	      }
	    }, result);
	  };

	  IndexedSequence.prototype = new ObjectLikeSequence();

	  IndexedSequence.prototype.each = function each(fn) {
	    var keyFn   = createCallback(this.keyFn),
	        valFn   = createCallback(this.valFn),
	        indexed = {};

	    return this.parent.each(function(e) {
	      var key = keyFn(e),
	          val = valFn(e);

	      if (!indexed[key]) {
	        indexed[key] = val;
	        return fn(val, key);
	      }
	    });
	  };

	  CountedSequence.prototype = new ObjectLikeSequence();

	  CountedSequence.prototype.each = function each(fn) {
	    var keyFn   = createCallback(this.keyFn),
	        counted = {};

	    this.parent.each(function(e) {
	      var key = keyFn(e);
	      if (!counted[key]) {
	        counted[key] = 1;
	      } else {
	        counted[key] += 1;
	      }
	    });

	    for (var key in counted) {
	      if (fn(counted[key], key) === false) {
	        return false;
	      }
	    }

	    return true;
	  };

	  /**
	   * Watches for all changes to a specified property (or properties) of an
	   * object and produces a sequence whose elements have the properties
	   * `{ property, value }` indicating which property changed and what it was
	   * changed to.
	   *
	   * Note that this method **only works on directly wrapped objects**; it will
	   * *not* work on any arbitrary {@link ObjectLikeSequence}.
	   *
	   * @public
	   * @param {(string|Array)=} propertyNames A property name or array of property
	   *     names to watch. If this parameter is `undefined`, all of the object's
	   *     current (enumerable) properties will be watched.
	   * @returns {Sequence} A sequence comprising `{ property, value }` objects
	   *     describing each change to the specified property/properties.
	   *
	   * @examples
	   * var obj = {},
	   *     changes = [];
	   *
	   * Lazy(obj).watch('foo').each(function(change) {
	   *   changes.push(change);
	   * });
	   *
	   * obj.foo = 1;
	   * obj.bar = 2;
	   * obj.foo = 3;
	   *
	   * obj.foo; // => 3
	   * changes; // => [{ property: 'foo', value: 1 }, { property: 'foo', value: 3 }]
	   */
	  ObjectLikeSequence.prototype.watch = function watch(propertyNames) {
	    throw new Error('You can only call #watch on a directly wrapped object.');
	  };

	  /**
	   * @constructor
	   */
	  function ObjectWrapper(source) {
	    this.source = source;
	  }

	  ObjectWrapper.prototype = new ObjectLikeSequence();

	  ObjectWrapper.prototype.root = function root() {
	    return this;
	  };

	  ObjectWrapper.prototype.isAsync = function isAsync() {
	    return false;
	  };

	  ObjectWrapper.prototype.get = function get(key) {
	    return this.source[key];
	  };

	  ObjectWrapper.prototype.each = function each(fn) {
	    var source = this.source,
	        key;

	    for (key in source) {
	      if (fn(source[key], key) === false) {
	        return false;
	      }
	    }

	    return true;
	  };

	  /**
	   * A `StringLikeSequence` represents a sequence of characters.
	   *
	   * The initial sequence you get by wrapping a string with `Lazy(string)` is a
	   * `StringLikeSequence`.
	   *
	   * All methods of `StringLikeSequence` that conceptually should return
	   * something like a string return another `StringLikeSequence`.
	   *
	   * @public
	   * @constructor
	   *
	   * @examples
	   * function upcase(str) { return str.toUpperCase(); }
	   *
	   * Lazy('foo')               // instanceof Lazy.StringLikeSequence
	   * Lazy('foo').toUpperCase() // instanceof Lazy.StringLikeSequence
	   * Lazy('foo').reverse()     // instanceof Lazy.StringLikeSequence
	   * Lazy('foo').take(2)       // instanceof Lazy.StringLikeSequence
	   * Lazy('foo').drop(1)       // instanceof Lazy.StringLikeSequence
	   * Lazy('foo').substring(1)  // instanceof Lazy.StringLikeSequence
	   *
	   * // Note that `map` does not create a `StringLikeSequence` because there's
	   * // no guarantee the mapping function will return characters. In the event
	   * // you do want to map a string onto a string-like sequence, use
	   * // `mapString`:
	   * Lazy('foo').map(Lazy.identity)       // instanceof Lazy.ArrayLikeSequence
	   * Lazy('foo').mapString(Lazy.identity) // instanceof Lazy.StringLikeSequence
	   */
	  function StringLikeSequence() {}

	  StringLikeSequence.prototype = new ArrayLikeSequence();

	  /**
	   * Create a new constructor function for a type inheriting from
	   * `StringLikeSequence`.
	   *
	   * @public
	   * @param {string|Array.<string>} methodName The name(s) of the method(s) to be
	   *     used for constructing the new sequence. The method will be attached to
	   *     the `StringLikeSequence` prototype so that it can be chained with any other
	   *     methods that return string-like sequences.
	   * @param {Object} overrides An object containing function overrides for this
	   *     new sequence type. Has the same requirements as
	   *     {@link ArrayLikeSequence.define}.
	   * @returns {Function} A constructor for a new type inheriting from
	   *     `StringLikeSequence`.
	   *
	   * @examples
	   * Lazy.StringLikeSequence.define("zomg", {
	   *   length: function() {
	   *     return this.parent.length() + "!!ZOMG!!!1".length;
	   *   },
	   *
	   *   get: function(i) {
	   *     if (i < this.parent.length()) {
	   *       return this.parent.get(i);
	   *     }
	   *     return "!!ZOMG!!!1".charAt(i - this.parent.length());
	   *   }
	   * });
	   *
	   * Lazy('foo').zomg() // sequence: "foo!!ZOMG!!!1"
	   */
	  StringLikeSequence.define = function define(methodName, overrides) {
	    if (!overrides || typeof overrides.get !== 'function') {
	      throw new Error("A custom string-like sequence must implement *at least* get!");
	    }

	    return defineSequenceType(StringLikeSequence, methodName, overrides);
	  };

	  StringLikeSequence.prototype.value = function value() {
	    return this.toString();
	  };

	  /**
	   * Returns an {@link IndexedIterator} that will step over each character in this
	   * sequence one by one.
	   *
	   * @returns {IndexedIterator} The iterator.
	   */
	  StringLikeSequence.prototype.getIterator = function getIterator() {
	    return new CharIterator(this);
	  };

	  /**
	   * @constructor
	   */
	  function CharIterator(source) {
	    this.source = Lazy(source);
	    this.index = -1;
	  }

	  CharIterator.prototype.current = function current() {
	    return this.source.charAt(this.index);
	  };

	  CharIterator.prototype.moveNext = function moveNext() {
	    return (++this.index < this.source.length());
	  };

	  /**
	   * Returns the character at the given index of this sequence, or the empty
	   * string if the specified index lies outside the bounds of the sequence.
	   *
	   * @public
	   * @param {number} i The index of this sequence.
	   * @returns {string} The character at the specified index.
	   *
	   * @examples
	   * Lazy("foo").charAt(0)  // => "f"
	   * Lazy("foo").charAt(-1) // => ""
	   * Lazy("foo").charAt(10) // => ""
	   */
	  StringLikeSequence.prototype.charAt = function charAt(i) {
	    return this.get(i);
	  };

	  /**
	   * Returns the character code at the given index of this sequence, or `NaN` if
	   * the index lies outside the bounds of the sequence.
	   *
	   * @public
	   * @param {number} i The index of the character whose character code you want.
	   * @returns {number} The character code.
	   *
	   * @examples
	   * Lazy("abc").charCodeAt(0)  // => 97
	   * Lazy("abc").charCodeAt(-1) // => NaN
	   * Lazy("abc").charCodeAt(10) // => NaN
	   */
	  StringLikeSequence.prototype.charCodeAt = function charCodeAt(i) {
	    var char = this.charAt(i);
	    if (!char) { return NaN; }

	    return char.charCodeAt(0);
	  };

	  /**
	   * Returns a {@link StringLikeSequence} comprising the characters from *this*
	   * sequence starting at `start` and ending at `stop` (exclusive), or---if
	   * `stop` is `undefined`, including the rest of the sequence.
	   *
	   * @public
	   * @param {number} start The index where this sequence should begin.
	   * @param {number=} stop The index (exclusive) where this sequence should end.
	   * @returns {StringLikeSequence} The new sequence.
	   *
	   * @examples
	   * Lazy("foo").substring(1)      // sequence: "oo"
	   * Lazy("foo").substring(-1)     // sequence: "foo"
	   * Lazy("hello").substring(1, 3) // sequence: "el"
	   * Lazy("hello").substring(1, 9) // sequence: "ello"
	   */
	  StringLikeSequence.prototype.substring = function substring(start, stop) {
	    return new StringSegment(this, start, stop);
	  };

	  /**
	   * @constructor
	   */
	  function StringSegment(parent, start, stop) {
	    this.parent = parent;
	    this.start  = Math.max(0, start);
	    this.stop   = stop;
	  }

	  StringSegment.prototype = new StringLikeSequence();

	  StringSegment.prototype.get = function get(i) {
	    return this.parent.get(i + this.start);
	  };

	  StringSegment.prototype.length = function length() {
	    return (typeof this.stop === "number" ? this.stop : this.parent.length()) - this.start;
	  };

	  /**
	   * An optimized version of {@link Sequence#first} that returns another
	   * {@link StringLikeSequence} (or just the first character, if `count` is
	   * undefined).
	   *
	   * @public
	   * @examples
	   * Lazy('foo').first()                // => 'f'
	   * Lazy('fo').first(2)                // sequence: 'fo'
	   * Lazy('foo').first(10)              // sequence: 'foo'
	   * Lazy('foo').toUpperCase().first()  // => 'F'
	   * Lazy('foo').toUpperCase().first(2) // sequence: 'FO'
	   */
	  StringLikeSequence.prototype.first = function first(count) {
	    if (typeof count === "undefined") {
	      return this.charAt(0);
	    }

	    return this.substring(0, count);
	  };

	  /**
	   * An optimized version of {@link Sequence#last} that returns another
	   * {@link StringLikeSequence} (or just the last character, if `count` is
	   * undefined).
	   *
	   * @public
	   * @examples
	   * Lazy('foo').last()                // => 'o'
	   * Lazy('foo').last(2)               // sequence: 'oo'
	   * Lazy('foo').last(10)              // sequence: 'foo'
	   * Lazy('foo').toUpperCase().last()  // => 'O'
	   * Lazy('foo').toUpperCase().last(2) // sequence: 'OO'
	   */
	  StringLikeSequence.prototype.last = function last(count) {
	    if (typeof count === "undefined") {
	      return this.charAt(this.length() - 1);
	    }

	    return this.substring(this.length() - count);
	  };

	  StringLikeSequence.prototype.drop = function drop(count) {
	    return this.substring(count);
	  };

	  /**
	   * Finds the index of the first occurrence of the given substring within this
	   * sequence, starting from the specified index (or the beginning of the
	   * sequence).
	   *
	   * @public
	   * @param {string} substring The substring to search for.
	   * @param {number=} startIndex The index from which to start the search.
	   * @returns {number} The first index where the given substring is found, or
	   *     -1 if it isn't in the sequence.
	   *
	   * @examples
	   * Lazy('canal').indexOf('a')    // => 1
	   * Lazy('canal').indexOf('a', 2) // => 3
	   * Lazy('canal').indexOf('ana')  // => 1
	   * Lazy('canal').indexOf('andy') // => -1
	   * Lazy('canal').indexOf('x')    // => -1
	   */
	  StringLikeSequence.prototype.indexOf = function indexOf(substring, startIndex) {
	    return this.toString().indexOf(substring, startIndex);
	  };

	  /**
	   * Finds the index of the last occurrence of the given substring within this
	   * sequence, starting from the specified index (or the end of the sequence)
	   * and working backwards.
	   *
	   * @public
	   * @param {string} substring The substring to search for.
	   * @param {number=} startIndex The index from which to start the search.
	   * @returns {number} The last index where the given substring is found, or
	   *     -1 if it isn't in the sequence.
	   *
	   * @examples
	   * Lazy('canal').lastIndexOf('a')    // => 3
	   * Lazy('canal').lastIndexOf('a', 2) // => 1
	   * Lazy('canal').lastIndexOf('ana')  // => 1
	   * Lazy('canal').lastIndexOf('andy') // => -1
	   * Lazy('canal').lastIndexOf('x')    // => -1
	   */
	  StringLikeSequence.prototype.lastIndexOf = function lastIndexOf(substring, startIndex) {
	    return this.toString().lastIndexOf(substring, startIndex);
	  };

	  /**
	   * Checks if this sequence contains a given substring.
	   *
	   * @public
	   * @param {string} substring The substring to check for.
	   * @returns {boolean} Whether or not this sequence contains `substring`.
	   *
	   * @examples
	   * Lazy('hello').contains('ell') // => true
	   * Lazy('hello').contains('')    // => true
	   * Lazy('hello').contains('abc') // => false
	   */
	  StringLikeSequence.prototype.contains = function contains(substring) {
	    return this.indexOf(substring) !== -1;
	  };

	  /**
	   * Checks if this sequence ends with a given suffix.
	   *
	   * @public
	   * @param {string} suffix The suffix to check for.
	   * @returns {boolean} Whether or not this sequence ends with `suffix`.
	   *
	   * @examples
	   * Lazy('foo').endsWith('oo')  // => true
	   * Lazy('foo').endsWith('')    // => true
	   * Lazy('foo').endsWith('abc') // => false
	   */
	  StringLikeSequence.prototype.endsWith = function endsWith(suffix) {
	    return this.substring(this.length() - suffix.length).toString() === suffix;
	  };

	  /**
	   * Checks if this sequence starts with a given prefix.
	   *
	   * @public
	   * @param {string} prefix The prefix to check for.
	   * @returns {boolean} Whether or not this sequence starts with `prefix`.
	   *
	   * @examples
	   * Lazy('foo').startsWith('fo')  // => true
	   * Lazy('foo').startsWith('')    // => true
	   * Lazy('foo').startsWith('abc') // => false
	   */
	  StringLikeSequence.prototype.startsWith = function startsWith(prefix) {
	    return this.substring(0, prefix.length).toString() === prefix;
	  };

	  /**
	   * Converts all of the characters in this string to uppercase.
	   *
	   * @public
	   * @returns {StringLikeSequence} A new sequence with the same characters as
	   *     this sequence, all uppercase.
	   *
	   * @examples
	   * function nextLetter(a) {
	   *   return String.fromCharCode(a.charCodeAt(0) + 1);
	   * }
	   *
	   * Lazy('foo').toUpperCase()                       // sequence: 'FOO'
	   * Lazy('foo').substring(1).toUpperCase()          // sequence: 'OO'
	   * Lazy('abc').mapString(nextLetter).toUpperCase() // sequence: 'BCD'
	   */
	  StringLikeSequence.prototype.toUpperCase = function toUpperCase() {
	    return this.mapString(function(char) { return char.toUpperCase(); });
	  };

	  /**
	   * Converts all of the characters in this string to lowercase.
	   *
	   * @public
	   * @returns {StringLikeSequence} A new sequence with the same characters as
	   *     this sequence, all lowercase.
	   *
	   * @examples
	   * function nextLetter(a) {
	   *   return String.fromCharCode(a.charCodeAt(0) + 1);
	   * }
	   *
	   * Lazy('FOO').toLowerCase()                       // sequence: 'foo'
	   * Lazy('FOO').substring(1).toLowerCase()          // sequence: 'oo'
	   * Lazy('ABC').mapString(nextLetter).toLowerCase() // sequence: 'bcd'
	   */
	  StringLikeSequence.prototype.toLowerCase = function toLowerCase() {
	    return this.mapString(function(char) { return char.toLowerCase(); });
	  };

	  /**
	   * Maps the characters of this sequence onto a new {@link StringLikeSequence}.
	   *
	   * @public
	   * @param {Function} mapFn The function used to map characters from this
	   *     sequence onto the new sequence.
	   * @returns {StringLikeSequence} The new sequence.
	   *
	   * @examples
	   * function upcase(char) { return char.toUpperCase(); }
	   *
	   * Lazy("foo").mapString(upcase)               // sequence: "FOO"
	   * Lazy("foo").mapString(upcase).charAt(0)     // => "F"
	   * Lazy("foo").mapString(upcase).charCodeAt(0) // => 70
	   * Lazy("foo").mapString(upcase).substring(1)  // sequence: "OO"
	   */
	  StringLikeSequence.prototype.mapString = function mapString(mapFn) {
	    return new MappedStringLikeSequence(this, mapFn);
	  };

	  /**
	   * @constructor
	   */
	  function MappedStringLikeSequence(parent, mapFn) {
	    this.parent = parent;
	    this.mapFn  = mapFn;
	  }

	  MappedStringLikeSequence.prototype = new StringLikeSequence();
	  MappedStringLikeSequence.prototype.get = IndexedMappedSequence.prototype.get;
	  MappedStringLikeSequence.prototype.length = IndexedMappedSequence.prototype.length;

	  /**
	   * Returns a copy of this sequence that reads back to front.
	   *
	   * @public
	   *
	   * @examples
	   * Lazy("abcdefg").reverse() // sequence: "gfedcba"
	   */
	  StringLikeSequence.prototype.reverse = function reverse() {
	    return new ReversedStringLikeSequence(this);
	  };

	  /**
	   * @constructor
	   */
	  function ReversedStringLikeSequence(parent) {
	    this.parent = parent;
	  }

	  ReversedStringLikeSequence.prototype = new StringLikeSequence();
	  ReversedStringLikeSequence.prototype.get = IndexedReversedSequence.prototype.get;
	  ReversedStringLikeSequence.prototype.length = IndexedReversedSequence.prototype.length;

	  StringLikeSequence.prototype.toString = function toString() {
	    return this.join("");
	  };

	  /**
	   * Creates a {@link Sequence} comprising all of the matches for the specified
	   * pattern in the underlying string.
	   *
	   * @public
	   * @param {RegExp} pattern The pattern to match.
	   * @returns {Sequence} A sequence of all the matches.
	   *
	   * @examples
	   * Lazy("abracadabra").match(/a[bcd]/) // sequence: ["ab", "ac", "ad", "ab"]
	   * Lazy("fee fi fo fum").match(/\w+/)  // sequence: ["fee", "fi", "fo", "fum"]
	   * Lazy("hello").match(/xyz/)          // sequence: []
	   */
	  StringLikeSequence.prototype.match = function match(pattern) {
	    return new StringMatchSequence(this, pattern);
	  };

	  /**
	   * @constructor
	   */
	  function StringMatchSequence(parent, pattern) {
	    this.parent = parent;
	    this.pattern = pattern;
	  }

	  StringMatchSequence.prototype = new Sequence();

	  StringMatchSequence.prototype.getIterator = function getIterator() {
	    return new StringMatchIterator(this.parent.toString(), this.pattern);
	  };

	  /**
	   * @constructor
	   */
	  function StringMatchIterator(source, pattern) {
	    this.source  = source;
	    this.pattern = cloneRegex(pattern);
	  }

	  StringMatchIterator.prototype.current = function current() {
	    return this.match[0];
	  };

	  StringMatchIterator.prototype.moveNext = function moveNext() {
	    return !!(this.match = this.pattern.exec(this.source));
	  };

	  /**
	   * Creates a {@link Sequence} comprising all of the substrings of this string
	   * separated by the given delimiter, which can be either a string or a regular
	   * expression.
	   *
	   * @public
	   * @param {string|RegExp} delimiter The delimiter to use for recognizing
	   *     substrings.
	   * @returns {Sequence} A sequence of all the substrings separated by the given
	   *     delimiter.
	   *
	   * @examples
	   * Lazy("foo").split("")                      // sequence: ["f", "o", "o"]
	   * Lazy("yo dawg").split(" ")                 // sequence: ["yo", "dawg"]
	   * Lazy("bah bah\tblack  sheep").split(/\s+/) // sequence: ["bah", "bah", "black", "sheep"]
	   */
	  StringLikeSequence.prototype.split = function split(delimiter) {
	    return new SplitStringSequence(this, delimiter);
	  };

	  /**
	   * @constructor
	   */
	  function SplitStringSequence(parent, pattern) {
	    this.parent = parent;
	    this.pattern = pattern;
	  }

	  SplitStringSequence.prototype = new Sequence();

	  SplitStringSequence.prototype.getIterator = function getIterator() {
	    var source = this.parent.toString();

	    if (this.pattern instanceof RegExp) {
	      if (this.pattern.source === "" || this.pattern.source === "(?:)") {
	        return new CharIterator(source);
	      } else {
	        return new SplitWithRegExpIterator(source, this.pattern);
	      }
	    } else if (this.pattern === "") {
	      return new CharIterator(source);
	    } else {
	      return new SplitWithStringIterator(source, this.pattern);
	    }
	  };

	  /**
	   * @constructor
	   */
	  function SplitWithRegExpIterator(source, pattern) {
	    this.source  = source;
	    this.pattern = cloneRegex(pattern);
	  }

	  SplitWithRegExpIterator.prototype.current = function current() {
	    return this.source.substring(this.start, this.end);
	  };

	  SplitWithRegExpIterator.prototype.moveNext = function moveNext() {
	    if (!this.pattern) {
	      return false;
	    }

	    var match = this.pattern.exec(this.source);

	    if (match) {
	      this.start = this.nextStart ? this.nextStart : 0;
	      this.end = match.index;
	      this.nextStart = match.index + match[0].length;
	      return true;

	    } else if (this.pattern) {
	      this.start = this.nextStart;
	      this.end = undefined;
	      this.nextStart = undefined;
	      this.pattern = undefined;
	      return true;
	    }

	    return false;
	  };

	  /**
	   * @constructor
	   */
	  function SplitWithStringIterator(source, delimiter) {
	    this.source = source;
	    this.delimiter = delimiter;
	  }

	  SplitWithStringIterator.prototype.current = function current() {
	    return this.source.substring(this.leftIndex, this.rightIndex);
	  };

	  SplitWithStringIterator.prototype.moveNext = function moveNext() {
	    if (!this.finished) {
	      this.leftIndex = typeof this.leftIndex !== "undefined" ?
	        this.rightIndex + this.delimiter.length :
	        0;
	      this.rightIndex = this.source.indexOf(this.delimiter, this.leftIndex);
	    }

	    if (this.rightIndex === -1) {
	      this.finished = true;
	      this.rightIndex = undefined;
	      return true;
	    }

	    return !this.finished;
	  };

	  /**
	   * Wraps a string exposing {@link #match} and {@link #split} methods that return
	   * {@link Sequence} objects instead of arrays, improving on the efficiency of
	   * JavaScript's built-in `String#split` and `String.match` methods and
	   * supporting asynchronous iteration.
	   *
	   * @param {string} source The string to wrap.
	   * @constructor
	   */
	  function StringWrapper(source) {
	    this.source = source;
	  }

	  StringWrapper.prototype = new StringLikeSequence();

	  StringWrapper.prototype.root = function root() {
	    return this;
	  };

	  StringWrapper.prototype.isAsync = function isAsync() {
	    return false;
	  };

	  StringWrapper.prototype.get = function get(i) {
	    return this.source.charAt(i);
	  };

	  StringWrapper.prototype.length = function length() {
	    return this.source.length;
	  };

	  StringWrapper.prototype.toString = function toString() {
	    return this.source;
	  };

	  /**
	   * A `GeneratedSequence` does not wrap an in-memory colllection but rather
	   * determines its elements on-the-fly during iteration according to a generator
	   * function.
	   *
	   * You create a `GeneratedSequence` by calling {@link Lazy.generate}.
	   *
	   * @public
	   * @constructor
	   * @param {function(number):*} generatorFn A function which accepts an index
	   *     and returns a value for the element at that position in the sequence.
	   * @param {number=} length The length of the sequence. If this argument is
	   *     omitted, the sequence will go on forever.
	   */
	  function GeneratedSequence(generatorFn, length) {
	    this.get = generatorFn;
	    this.fixedLength = length;
	  }

	  GeneratedSequence.prototype = new Sequence();

	  GeneratedSequence.prototype.isAsync = function isAsync() {
	    return false;
	  };

	  /**
	   * Returns the length of this sequence.
	   *
	   * @public
	   * @returns {number} The length, or `undefined` if this is an indefinite
	   *     sequence.
	   */
	  GeneratedSequence.prototype.length = function length() {
	    return this.fixedLength;
	  };

	  /**
	   * Iterates over the sequence produced by invoking this sequence's generator
	   * function up to its specified length, or, if length is `undefined`,
	   * indefinitely (in which case the sequence will go on forever--you would need
	   * to call, e.g., {@link Sequence#take} to limit iteration).
	   *
	   * @public
	   * @param {Function} fn The function to call on each output from the generator
	   *     function.
	   */
	  GeneratedSequence.prototype.each = function each(fn) {
	    var generatorFn = this.get,
	        length = this.fixedLength,
	        i = 0;

	    while (typeof length === "undefined" || i < length) {
	      if (fn(generatorFn(i), i++) === false) {
	        return false;
	      }
	    }

	    return true;
	  };

	  GeneratedSequence.prototype.getIterator = function getIterator() {
	    return new GeneratedIterator(this);
	  };

	  /**
	   * Iterates over a generated sequence. (This allows generated sequences to be
	   * iterated asynchronously.)
	   *
	   * @param {GeneratedSequence} sequence The generated sequence to iterate over.
	   * @constructor
	   */
	  function GeneratedIterator(sequence) {
	    this.sequence     = sequence;
	    this.index        = 0;
	    this.currentValue = null;
	  }

	  GeneratedIterator.prototype.current = function current() {
	    return this.currentValue;
	  };

	  GeneratedIterator.prototype.moveNext = function moveNext() {
	    var sequence = this.sequence;

	    if (typeof sequence.fixedLength === "number" && this.index >= sequence.fixedLength) {
	      return false;
	    }

	    this.currentValue = sequence.get(this.index++);
	    return true;
	  };

	  /**
	   * An `AsyncSequence` iterates over its elements asynchronously when
	   * {@link #each} is called.
	   *
	   * You get an `AsyncSequence` by calling {@link Sequence#async} on any
	   * sequence. Note that some sequence types may not support asynchronous
	   * iteration.
	   *
	   * Returning values
	   * ----------------
	   *
	   * Because of its asynchronous nature, an `AsyncSequence` cannot be used in the
	   * same way as other sequences for functions that return values directly (e.g.,
	   * `reduce`, `max`, `any`, even `toArray`).
	   *
	   * Instead, these methods return an `AsyncHandle` whose `onComplete` method
	   * accepts a callback that will be called with the final result once iteration
	   * has finished.
	   *
	   * Defining custom asynchronous sequences
	   * --------------------------------------
	   *
	   * There are plenty of ways to define an asynchronous sequence. Here's one.
	   *
	   * 1. First, implement an {@link Iterator}. This is an object whose prototype
	   *    has the methods {@link Iterator#moveNext} (which returns a `boolean`) and
	   *    {@link current} (which returns the current value).
	   * 2. Next, create a simple wrapper that inherits from `AsyncSequence`, whose
	   *    `getIterator` function returns an instance of the iterator type you just
	   *    defined.
	   *
	   * The default implementation for {@link #each} on an `AsyncSequence` is to
	   * create an iterator and then asynchronously call {@link Iterator#moveNext}
	   * (using `setImmediate`, if available, otherwise `setTimeout`) until the iterator
	   * can't move ahead any more.
	   *
	   * @public
	   * @constructor
	   * @param {Sequence} parent A {@link Sequence} to wrap, to expose asynchronous
	   *     iteration.
	   * @param {number=} interval How many milliseconds should elapse between each
	   *     element when iterating over this sequence. If this argument is omitted,
	   *     asynchronous iteration will be executed as fast as possible.
	   */
	  function AsyncSequence(parent, interval) {
	    if (parent instanceof AsyncSequence) {
	      throw new Error("Sequence is already asynchronous!");
	    }

	    this.parent         = parent;
	    this.interval       = interval;
	    this.onNextCallback = getOnNextCallback(interval);
	    this.cancelCallback = getCancelCallback(interval);
	  }

	  AsyncSequence.prototype = new Sequence();

	  AsyncSequence.prototype.isAsync = function isAsync() {
	    return true;
	  };

	  /**
	   * Throws an exception. You cannot manually iterate over an asynchronous
	   * sequence.
	   *
	   * @public
	   * @example
	   * Lazy([1, 2, 3]).async().getIterator() // throws
	   */
	  AsyncSequence.prototype.getIterator = function getIterator() {
	    throw new Error('An AsyncSequence does not support synchronous iteration.');
	  };

	  /**
	   * An asynchronous version of {@link Sequence#each}.
	   *
	   * @public
	   * @param {Function} fn The function to invoke asynchronously on each element in
	   *     the sequence one by one.
	   * @returns {AsyncHandle} An {@link AsyncHandle} providing the ability to
	   *     cancel the asynchronous iteration (by calling `cancel()`) as well as
	   *     supply callback(s) for when an error is encountered (`onError`) or when
	   *     iteration is complete (`onComplete`).
	   */
	  AsyncSequence.prototype.each = function each(fn) {
	    var iterator = this.parent.getIterator(),
	        onNextCallback = this.onNextCallback,
	        cancelCallback = this.cancelCallback,
	        i = 0;

	    var handle = new AsyncHandle(function cancel() {
	      if (cancellationId) {
	        cancelCallback(cancellationId);
	      }
	    });

	    var cancellationId = onNextCallback(function iterate() {
	      cancellationId = null;

	      try {
	        if (iterator.moveNext() && fn(iterator.current(), i++) !== false) {
	          cancellationId = onNextCallback(iterate);

	        } else {
	          handle._resolve();
	        }

	      } catch (e) {
	        handle._reject(e);
	      }
	    });

	    return handle;
	  };

	  /**
	   * An `AsyncHandle` provides a [Promises/A+](http://promises-aplus.github.io/promises-spec/)
	   * compliant interface for an {@link AsyncSequence} that is currently (or was)
	   * iterating over its elements.
	   *
	   * In addition to behaving as a promise, an `AsyncHandle` provides the ability
	   * to {@link AsyncHandle#cancel} iteration (if `cancelFn` is provided)
	   * and also offers convenient {@link AsyncHandle#onComplete} and
	   * {@link AsyncHandle#onError} methods to attach listeners for when iteration
	   * is complete or an error is thrown during iteration.
	   *
	   * @public
	   * @param {Function} cancelFn A function to cancel asynchronous iteration.
	   *     This is passed in to support different cancellation mechanisms for
	   *     different forms of asynchronous sequences (e.g., timeout-based
	   *     sequences, sequences based on I/O, etc.).
	   * @constructor
	   *
	   * @example
	   * // Create a sequence of 100,000 random numbers, in chunks of 100.
	   * var sequence = Lazy.generate(Math.random)
	   *   .chunk(100)
	   *   .async()
	   *   .take(1000);
	   *
	   * // Reduce-style operations -- i.e., operations that return a *value* (as
	   * // opposed to a *sequence*) -- return an AsyncHandle for async sequences.
	   * var handle = sequence.toArray();
	   *
	   * handle.onComplete(function(array) {
	   *   // Do something w/ 1,000-element array.
	   * });
	   *
	   * // Since an AsyncHandle is a promise, you can also use it to create
	   * // subsequent promises using `then` (see the Promises/A+ spec for more
	   * // info).
	   * var flattened = handle.then(function(array) {
	   *   return Lazy(array).flatten();
	   * });
	   */
	  function AsyncHandle(cancelFn) {
	    this.resolveListeners = [];
	    this.rejectListeners = [];
	    this.state = PENDING;
	    this.cancelFn = cancelFn;
	  }

	  // Async handle states
	  var PENDING  = 1,
	      RESOLVED = 2,
	      REJECTED = 3;

	  AsyncHandle.prototype.then = function then(onFulfilled, onRejected) {
	    var promise = new AsyncHandle(this.cancelFn);

	    this.resolveListeners.push(function(value) {
	      try {
	        if (typeof onFulfilled !== 'function') {
	          resolve(promise, value);
	          return;
	        }

	        resolve(promise, onFulfilled(value));

	      } catch (e) {
	        promise._reject(e);
	      }
	    });

	    this.rejectListeners.push(function(reason) {
	      try {
	        if (typeof onRejected !== 'function') {
	          promise._reject(reason);
	          return;
	        }

	        resolve(promise, onRejected(reason));

	      } catch (e) {
	        promise._reject(e);
	      }
	    });

	    if (this.state === RESOLVED) {
	      this._resolve(this.value);
	    }

	    if (this.state === REJECTED) {
	      this._reject(this.reason);
	    }

	    return promise;
	  };

	  AsyncHandle.prototype._resolve = function _resolve(value) {
	    if (this.state === REJECTED) {
	      return;
	    }

	    if (this.state === PENDING) {
	      this.state = RESOLVED;
	      this.value = value;
	    }

	    consumeListeners(this.resolveListeners, this.value);
	  };

	  AsyncHandle.prototype._reject = function _reject(reason) {
	    if (this.state === RESOLVED) {
	      return;
	    }

	    if (this.state === PENDING) {
	      this.state = REJECTED;
	      this.reason = reason;
	    }

	    consumeListeners(this.rejectListeners, this.reason);
	  };

	  /**
	   * Cancels asynchronous iteration.
	   *
	   * @public
	   */
	  AsyncHandle.prototype.cancel = function cancel() {
	    if (this.cancelFn) {
	      this.cancelFn();
	      this.cancelFn = null;
	      this._resolve(false);
	    }
	  };

	  /**
	   * Updates the handle with a callback to execute when iteration is completed.
	   *
	   * @public
	   * @param {Function} callback The function to call when the asynchronous
	   *     iteration is completed.
	   * @return {AsyncHandle} A reference to the handle (for chaining).
	   */
	  AsyncHandle.prototype.onComplete = function onComplete(callback) {
	    this.resolveListeners.push(callback);
	    return this;
	  };

	  /**
	   * Updates the handle with a callback to execute if/when any error is
	   * encountered during asynchronous iteration.
	   *
	   * @public
	   * @param {Function} callback The function to call, with any associated error
	   *     object, when an error occurs.
	   * @return {AsyncHandle} A reference to the handle (for chaining).
	   */
	  AsyncHandle.prototype.onError = function onError(callback) {
	    this.rejectListeners.push(callback);
	    return this;
	  };

	  /**
	   * Promise resolution procedure:
	   * http://promises-aplus.github.io/promises-spec/#the_promise_resolution_procedure
	   */
	  function resolve(promise, x) {
	    if (promise === x) {
	      promise._reject(new TypeError('Cannot resolve a promise to itself'));
	      return;
	    }

	    if (x instanceof AsyncHandle) {
	      x.then(
	        function(value) { resolve(promise, value); },
	        function(reason) { promise._reject(reason); }
	      );
	      return;
	    }

	    var then;
	    try {
	      then = (/function|object/).test(typeof x) && x != null && x.then;
	    } catch (e) {
	      promise._reject(e);
	      return;
	    }

	    var thenableState = PENDING;
	    if (typeof then === 'function') {
	      try {
	        then.call(
	          x,
	          function resolvePromise(value) {
	            if (thenableState !== PENDING) {
	              return;
	            }
	            thenableState = RESOLVED;
	            resolve(promise, value);
	          },
	          function rejectPromise(reason) {
	            if (thenableState !== PENDING) {
	              return;
	            }
	            thenableState = REJECTED;
	            promise._reject(reason);
	          }
	        );
	      } catch (e) {
	        if (thenableState !== PENDING) {
	          return;
	        }

	        promise._reject(e);
	      }

	      return;
	    }

	    promise._resolve(x);
	  }

	  function consumeListeners(listeners, value, callback) {
	    callback || (callback = getOnNextCallback());

	    callback(function() {
	      if (listeners.length > 0) {
	        listeners.shift()(value);
	        consumeListeners(listeners, value, callback);
	      }
	    });
	  }

	  function getOnNextCallback(interval) {
	    if (typeof interval === "undefined") {
	      if (typeof setImmediate === "function") {
	        return setImmediate;
	      }
	    }

	    interval = interval || 0;
	    return function(fn) {
	      return setTimeout(fn, interval);
	    };
	  }

	  function getCancelCallback(interval) {
	    if (typeof interval === "undefined") {
	      if (typeof clearImmediate === "function") {
	        return clearImmediate;
	      }
	    }

	    return clearTimeout;
	  }

	  /**
	   * Transform a value, whether the value is retrieved asynchronously or directly.
	   *
	   * @private
	   * @param {Function} fn The function that transforms the value.
	   * @param {*} value The value to be transformed. This can be an {@link AsyncHandle} when the value
	   *     is retrieved asynchronously, otherwise it can be anything.
	   * @returns {*} An {@link AsyncHandle} when `value` is also an {@link AsyncHandle}, otherwise
	   *     whatever `fn` resulted in.
	   */
	  function transform(fn, value) {
	    if (value instanceof AsyncHandle) {
	      return value.then(function() { fn(value); });
	    }
	    return fn(value);
	  }

	  /**
	   * An async version of {@link Sequence#reverse}.
	   */
	  AsyncSequence.prototype.reverse = function reverse() {
	    return this.parent.reverse().async();
	  };

	  /**
	   * A version of {@link Sequence#find} which returns an {@link AsyncHandle}.
	   *
	   * @public
	   * @param {Function} predicate A function to call on (potentially) every element
	   *     in the sequence.
	   * @returns {AsyncHandle} An {@link AsyncHandle} (promise) which resolves to
	   *     the found element, once it is detected, or else `undefined`.
	   */
	  AsyncSequence.prototype.find = function find(predicate) {
	    var found;

	    var handle = this.each(function(e, i) {
	      if (predicate(e, i)) {
	        found = e;
	        return false;
	      }
	    });

	    return handle.then(function() { return found; });
	  };

	  /**
	   * A version of {@link Sequence#indexOf} which returns an {@link AsyncHandle}.
	   *
	   * @public
	   * @param {*} value The element to search for in the sequence.
	   * @returns {AsyncHandle} An {@link AsyncHandle} (promise) which resolves to
	   *     the found index, once it is detected, or -1.
	   */
	  AsyncSequence.prototype.indexOf = function indexOf(value) {
	    var foundIndex = -1;

	    var handle = this.each(function(e, i) {
	      if (e === value) {
	        foundIndex = i;
	        return false;
	      }
	    });

	    return handle.then(function() {
	      return foundIndex;
	    });
	  };

	  /**
	   * A version of {@link Sequence#contains} which returns an {@link AsyncHandle}.
	   *
	   * @public
	   * @param {*} value The element to search for in the sequence.
	   * @returns {AsyncHandle} An {@link AsyncHandle} (promise) which resolves to
	   *     either `true` or `false` to indicate whether the element was found.
	   */
	  AsyncSequence.prototype.contains = function contains(value) {
	    var found = false;

	    var handle = this.each(function(e) {
	      if (e === value) {
	        found = true;
	        return false;
	      }
	    });

	    return handle.then(function() {
	      return found;
	    });
	  };

	  /**
	   * Just return the same sequence for `AsyncSequence#async` (I see no harm in this).
	   */
	  AsyncSequence.prototype.async = function async() {
	    return this;
	  };

	  /**
	   * See {@link ObjectLikeSequence#watch} for docs.
	   */
	  ObjectWrapper.prototype.watch = function watch(propertyNames) {
	    return new WatchedPropertySequence(this.source, propertyNames);
	  };

	  function WatchedPropertySequence(object, propertyNames) {
	    this.listeners = [];

	    if (!propertyNames) {
	      propertyNames = Lazy(object).keys().toArray();
	    } else if (!(propertyNames instanceof Array)) {
	      propertyNames = [propertyNames];
	    }

	    var listeners = this.listeners,
	        index     = 0;

	    Lazy(propertyNames).each(function(propertyName) {
	      var propertyValue = object[propertyName];

	      Object.defineProperty(object, propertyName, {
	        get: function() {
	          return propertyValue;
	        },

	        set: function(value) {
	          for (var i = listeners.length - 1; i >= 0; --i) {
	            if (listeners[i]({ property: propertyName, value: value }, index) === false) {
	              listeners.splice(i, 1);
	            }
	          }
	          propertyValue = value;
	          ++index;
	        }
	      });
	    });
	  }

	  WatchedPropertySequence.prototype = new AsyncSequence();

	  WatchedPropertySequence.prototype.each = function each(fn) {
	    this.listeners.push(fn);
	  };

	  /**
	   * A StreamLikeSequence comprises a sequence of 'chunks' of data, which are
	   * typically multiline strings.
	   *
	   * @constructor
	   */
	  function StreamLikeSequence() {}

	  StreamLikeSequence.prototype = new AsyncSequence();

	  StreamLikeSequence.prototype.isAsync = function isAsync() {
	    return true;
	  };

	  StreamLikeSequence.prototype.split = function split(delimiter) {
	    return new SplitStreamSequence(this, delimiter);
	  };

	  /**
	   * @constructor
	   */
	  function SplitStreamSequence(parent, delimiter) {
	    this.parent    = parent;
	    this.delimiter = delimiter;
	    this.each      = this.getEachForDelimiter(delimiter);
	  }

	  SplitStreamSequence.prototype = new Sequence();

	  SplitStreamSequence.prototype.getEachForDelimiter = function getEachForDelimiter(delimiter) {
	    if (delimiter instanceof RegExp) {
	      return this.regexEach;
	    }

	    return this.stringEach;
	  };

	  SplitStreamSequence.prototype.regexEach = function each(fn) {
	    var delimiter = cloneRegex(this.delimiter),
	        buffer = '',
	        start = 0, end,
	        index = 0;

	    var handle = this.parent.each(function(chunk) {
	      buffer += chunk;

	      var match;
	      while (match = delimiter.exec(buffer)) {
	        end = match.index;
	        if (fn(buffer.substring(start, end), index++) === false) {
	          return false;
	        }
	        start = end + match[0].length;
	      }

	      buffer = buffer.substring(start);
	      start = 0;
	    });

	    handle.onComplete(function() {
	      if (buffer.length > 0) {
	        fn(buffer, index++);
	      }
	    });

	    return handle;
	  };

	  SplitStreamSequence.prototype.stringEach = function each(fn) {
	    var delimiter  = this.delimiter,
	        pieceIndex = 0,
	        buffer = '',
	        bufferIndex = 0;

	    var handle = this.parent.each(function(chunk) {
	      buffer += chunk;
	      var delimiterIndex;
	      while ((delimiterIndex = buffer.indexOf(delimiter)) >= 0) {
	        var piece = buffer.substr(0,delimiterIndex);
	        buffer = buffer.substr(delimiterIndex+delimiter.length);
	        if (fn(piece,pieceIndex++) === false) {
	          return false;
	        }
	      }
	      return true;
	    });

	    handle.onComplete(function() {
	      fn(buffer, pieceIndex++);
	    });

	    return handle;
	  };

	  StreamLikeSequence.prototype.lines = function lines() {
	    return this.split("\n");
	  };

	  StreamLikeSequence.prototype.match = function match(pattern) {
	    return new MatchedStreamSequence(this, pattern);
	  };

	  /**
	   * @constructor
	   */
	  function MatchedStreamSequence(parent, pattern) {
	    this.parent  = parent;
	    this.pattern = cloneRegex(pattern);
	  }

	  MatchedStreamSequence.prototype = new AsyncSequence();

	  MatchedStreamSequence.prototype.each = function each(fn) {
	    var pattern = this.pattern,
	        done      = false,
	        i         = 0;

	    return this.parent.each(function(chunk) {
	      Lazy(chunk).match(pattern).each(function(match) {
	        if (fn(match, i++) === false) {
	          done = true;
	          return false;
	        }
	      });

	      return !done;
	    });
	  };

	  /**
	   * Defines a wrapper for custom {@link StreamLikeSequence}s. This is useful
	   * if you want a way to handle a stream of events as a sequence, but you can't
	   * use Lazy's existing interface (i.e., you're wrapping an object from a
	   * library with its own custom events).
	   *
	   * This method defines a *factory*: that is, it produces a function that can
	   * be used to wrap objects and return a {@link Sequence}. Hopefully the
	   * example will make this clear.
	   *
	   * @public
	   * @param {Function} initializer An initialization function called on objects
	   *     created by this factory. `this` will be bound to the created object,
	   *     which is an instance of {@link StreamLikeSequence}. Use `emit` to
	   *     generate data for the sequence.
	   * @returns {Function} A function that creates a new {@link StreamLikeSequence},
	   *     initializes it using the specified function, and returns it.
	   *
	   * @example
	   * var factory = Lazy.createWrapper(function(eventSource) {
	   *   var sequence = this;
	   *
	   *   eventSource.handleEvent(function(data) {
	   *     sequence.emit(data);
	   *   });
	   * });
	   *
	   * var eventEmitter = {
	   *   triggerEvent: function(data) {
	   *     eventEmitter.eventHandler(data);
	   *   },
	   *   handleEvent: function(handler) {
	   *     eventEmitter.eventHandler = handler;
	   *   },
	   *   eventHandler: function() {}
	   * };
	   *
	   * var events = [];
	   *
	   * factory(eventEmitter).each(function(e) {
	   *   events.push(e);
	   * });
	   *
	   * eventEmitter.triggerEvent('foo');
	   * eventEmitter.triggerEvent('bar');
	   *
	   * events // => ['foo', 'bar']
	   */
	  Lazy.createWrapper = function createWrapper(initializer) {
	    var ctor = function() {
	      this.listeners = [];
	    };

	    ctor.prototype = new StreamLikeSequence();

	    ctor.prototype.each = function(listener) {
	      this.listeners.push(listener);
	    };

	    ctor.prototype.emit = function(data) {
	      var listeners = this.listeners;

	      for (var len = listeners.length, i = len - 1; i >= 0; --i) {
	        if (listeners[i](data) === false) {
	          listeners.splice(i, 1);
	        }
	      }
	    };

	    return function() {
	      var sequence = new ctor();
	      initializer.apply(sequence, arguments);
	      return sequence;
	    };
	  };

	  /**
	   * Creates a {@link GeneratedSequence} using the specified generator function
	   * and (optionally) length.
	   *
	   * @public
	   * @param {function(number):*} generatorFn The function used to generate the
	   *     sequence. This function accepts an index as a parameter and should return
	   *     a value for that index in the resulting sequence.
	   * @param {number=} length The length of the sequence, for sequences with a
	   *     definite length.
	   * @returns {GeneratedSequence} The generated sequence.
	   *
	   * @examples
	   * var randomNumbers = Lazy.generate(Math.random);
	   * var countingNumbers = Lazy.generate(function(i) { return i + 1; }, 5);
	   *
	   * randomNumbers          // instanceof Lazy.GeneratedSequence
	   * randomNumbers.length() // => undefined
	   * countingNumbers          // sequence: [1, 2, 3, 4, 5]
	   * countingNumbers.length() // => 5
	   */
	  Lazy.generate = function generate(generatorFn, length) {
	    return new GeneratedSequence(generatorFn, length);
	  };

	  /**
	   * Creates a sequence from a given starting value, up to a specified stopping
	   * value, incrementing by a given step. Invalid values for any of these
	   * arguments (e.g., a step of 0) result in an empty sequence.
	   *
	   * @public
	   * @returns {GeneratedSequence} The sequence defined by the given ranges.
	   *
	   * @examples
	   * Lazy.range(3)         // sequence: [0, 1, 2]
	   * Lazy.range(1, 4)      // sequence: [1, 2, 3]
	   * Lazy.range(2, 10, 2)  // sequence: [2, 4, 6, 8]
	   * Lazy.range(5, 1, 2)   // sequence: []
	   * Lazy.range(5, 15, -2) // sequence: []
	   * Lazy.range(3, 10, 3)  // sequence: [3, 6, 9]
	   * Lazy.range(5, 2)      // sequence: [5, 4, 3]
	   * Lazy.range(7, 2, -2)  // sequence: [7, 5, 3]
	   * Lazy.range(3, 5, 0)   // sequence: []
	   */
	  Lazy.range = function range() {
	    var start = arguments.length > 1 ? arguments[0] : 0,
	        stop  = arguments.length > 1 ? arguments[1] : arguments[0],
	        step  = arguments.length > 2 && arguments[2];

	    if (step === false) {
	      step = stop > start ? 1 : -1;
	    }

	    if (step === 0) {
	      return Lazy([]);
	    }

	    return Lazy.generate(function(i) { return start + (step * i); })
	      .take(Math.ceil((stop - start) / step));
	  };

	  /**
	   * Creates a sequence consisting of the given value repeated a specified number
	   * of times.
	   *
	   * @public
	   * @param {*} value The value to repeat.
	   * @param {number=} count The number of times the value should be repeated in
	   *     the sequence. If this argument is omitted, the value will repeat forever.
	   * @returns {GeneratedSequence} The sequence containing the repeated value.
	   *
	   * @examples
	   * Lazy.repeat("hi", 3)          // sequence: ["hi", "hi", "hi"]
	   * Lazy.repeat("young")          // instanceof Lazy.GeneratedSequence
	   * Lazy.repeat("young").length() // => undefined
	   * Lazy.repeat("young").take(3)  // sequence: ["young", "young", "young"]
	   */
	  Lazy.repeat = function repeat(value, count) {
	    return Lazy.generate(function() { return value; }, count);
	  };

	  Lazy.Sequence           = Sequence;
	  Lazy.ArrayLikeSequence  = ArrayLikeSequence;
	  Lazy.ObjectLikeSequence = ObjectLikeSequence;
	  Lazy.StringLikeSequence = StringLikeSequence;
	  Lazy.StreamLikeSequence = StreamLikeSequence;
	  Lazy.GeneratedSequence  = GeneratedSequence;
	  Lazy.AsyncSequence      = AsyncSequence;
	  Lazy.AsyncHandle        = AsyncHandle;

	  /*** Useful utility methods ***/

	  /**
	   * Creates a shallow copy of an array or object.
	   *
	   * @examples
	   * var array  = [1, 2, 3], clonedArray,
	   *     object = { foo: 1, bar: 2 }, clonedObject;
	   *
	   * clonedArray = Lazy.clone(array); // => [1, 2, 3]
	   * clonedArray.push(4); // clonedArray == [1, 2, 3, 4]
	   * array; // => [1, 2, 3]
	   *
	   * clonedObject = Lazy.clone(object); // => { foo: 1, bar: 2 }
	   * clonedObject.baz = 3; // clonedObject == { foo: 1, bar: 2, baz: 3 }
	   * object; // => { foo: 1, bar: 2 }
	   */
	  Lazy.clone = function clone(target) {
	    return Lazy(target).value();
	  };

	  /**
	   * Marks a method as deprecated, so calling it will issue a console warning.
	   */
	  Lazy.deprecate = function deprecate(message, fn) {
	    return function() {
	      console.warn(message);
	      return fn.apply(this, arguments);
	    };
	  };

	  var arrayPop   = Array.prototype.pop,
	      arraySlice = Array.prototype.slice;

	  /**
	   * Creates a callback... you know, Lo-Dash style.
	   *
	   * - for functions, just returns the function
	   * - for strings, returns a pluck-style callback
	   * - for objects, returns a where-style callback
	   *
	   * @private
	   * @param {Function|string|Object} callback A function, string, or object to
	   *     convert to a callback.
	   * @param {*} defaultReturn If the callback is undefined, a default return
	   *     value to use for the function.
	   * @returns {Function} The callback function.
	   *
	   * @examples
	   * createCallback(function() {})                  // instanceof Function
	   * createCallback('foo')                          // instanceof Function
	   * createCallback('foo')({ foo: 'bar'})           // => 'bar'
	   * createCallback({ foo: 'bar' })({ foo: 'bar' }) // => true
	   * createCallback({ foo: 'bar' })({ foo: 'baz' }) // => false
	   */
	  function createCallback(callback, defaultValue) {
	    switch (typeof callback) {
	      case "function":
	        return callback;

	      case "string":
	        return function(e) {
	          return e[callback];
	        };

	      case "object":
	        return function(e) {
	          return Lazy(callback).all(function(value, key) {
	            return e[key] === value;
	          });
	        };

	      case "undefined":
	        return defaultValue ?
	          function() { return defaultValue; } :
	          Lazy.identity;

	      default:
	        throw new Error("Don't know how to make a callback from a " + typeof callback + "!");
	    }
	  }

	  /**
	   * Takes a function that returns a value for one argument and produces a
	   * function that compares two arguments.
	   *
	   * @private
	   * @param {Function|string|Object} callback A function, string, or object to
	   *     convert to a callback using `createCallback`.
	   * @returns {Function} A function that accepts two values and returns 1 if
	   *     the first is greater, -1 if the second is greater, or 0 if they are
	   *     equivalent.
	   *
	   * @examples
	   * createComparator('a')({ a: 1 }, { a: 2 });       // => -1
	   * createComparator('a')({ a: 6 }, { a: 2 });       // => 1
	   * createComparator('a')({ a: 1 }, { a: 1 });       // => 0
	   * createComparator()(3, 5);                        // => -1
	   * createComparator()(7, 5);                        // => 1
	   * createComparator()(3, 3);                        // => 0
	   */
	  function createComparator(callback, descending) {
	    if (!callback) { return compare; }

	    callback = createCallback(callback);

	    return function(x, y) {
	      return compare(callback(x), callback(y));
	    };
	  }

	  /**
	   * Takes a function and returns a function with the same logic but the
	   * arguments reversed. Only applies to functions w/ arity=2 as this is private
	   * and I can do what I want.
	   *
	   * @private
	   * @param {Function} fn The function to "reverse"
	   * @returns {Function} The "reversed" function
	   *
	   * @examples
	   * reverseArguments(function(x, y) { return x + y; })('a', 'b'); // => 'ba'
	   */
	  function reverseArguments(fn) {
	    return function(x, y) { return fn(y, x); };
	  }

	  /**
	   * Creates a Set containing the specified values.
	   *
	   * @param {...Array} values One or more array(s) of values used to populate the
	   *     set.
	   * @returns {Set} A new set containing the values passed in.
	   */
	  function createSet(values) {
	    var set = new Set();
	    Lazy(values || []).flatten().each(function(e) {
	      set.add(e);
	    });
	    return set;
	  }

	  /**
	   * Compares two elements for sorting purposes.
	   *
	   * @private
	   * @param {*} x The left element to compare.
	   * @param {*} y The right element to compare.
	   * @returns {number} 1 if x > y, -1 if x < y, or 0 if x and y are equal.
	   *
	   * @examples
	   * compare(1, 2)     // => -1
	   * compare(1, 1)     // => 0
	   * compare(2, 1)     // => 1
	   * compare('a', 'b') // => -1
	   */
	  function compare(x, y) {
	    if (x === y) {
	      return 0;
	    }

	    return x > y ? 1 : -1;
	  }

	  /**
	   * Iterates over every element in an array.
	   *
	   * @param {Array} array The array.
	   * @param {Function} fn The function to call on every element, which can return
	   *     false to stop the iteration early.
	   * @returns {boolean} True if every element in the entire sequence was iterated,
	   *     otherwise false.
	   */
	  function forEach(array, fn) {
	    var i = -1,
	        len = array.length;

	    while (++i < len) {
	      if (fn(array[i], i) === false) {
	        return false;
	      }
	    }

	    return true;
	  }

	  function getFirst(sequence) {
	    var result;
	    sequence.each(function(e) {
	      result = e;
	      return false;
	    });
	    return result;
	  }

	  /**
	   * Checks if an element exists in an array.
	   *
	   * @private
	   * @param {Array} array
	   * @param {*} element
	   * @returns {boolean} Whether or not the element exists in the array.
	   *
	   * @examples
	   * arrayContains([1, 2], 2)              // => true
	   * arrayContains([1, 2], 3)              // => false
	   * arrayContains([undefined], undefined) // => true
	   * arrayContains([NaN], NaN)             // => true
	   */
	  function arrayContains(array, element) {
	    var i = -1,
	        length = array.length;

	    // Special handling for NaN
	    if (element !== element) {
	      while (++i < length) {
	        if (array[i] !== array[i]) {
	          return true;
	        }
	      }
	      return false;
	    }

	    while (++i < length) {
	      if (array[i] === element) {
	        return true;
	      }
	    }
	    return false;
	  }

	  /**
	   * Checks if an element exists in an array before a given index.
	   *
	   * @private
	   * @param {Array} array
	   * @param {*} element
	   * @param {number} index
	   * @param {Function} keyFn
	   * @returns {boolean}
	   *
	   * @examples
	   * arrayContainsBefore([1, 2, 3], 3, 2) // => false
	   * arrayContainsBefore([1, 2, 3], 3, 3) // => true
	   */
	  function arrayContainsBefore(array, element, index, keyFn) {
	    var i = -1;

	    if (keyFn) {
	      keyFn = createCallback(keyFn);
	      while (++i < index) {
	        if (keyFn(array[i]) === keyFn(element)) {
	          return true;
	        }
	      }

	    } else {
	      while (++i < index) {
	        if (array[i] === element) {
	          return true;
	        }
	      }
	    }

	    return false;
	  }

	  /**
	   * Swaps the elements at two specified positions of an array.
	   *
	   * @private
	   * @param {Array} array
	   * @param {number} i
	   * @param {number} j
	   *
	   * @examples
	   * var array = [1, 2, 3, 4, 5];
	   *
	   * swap(array, 2, 3) // array == [1, 2, 4, 3, 5]
	   */
	  function swap(array, i, j) {
	    var temp = array[i];
	    array[i] = array[j];
	    array[j] = temp;
	  }

	  /**
	   * "Clones" a regular expression (but makes it always global).
	   *
	   * @private
	   * @param {RegExp|string} pattern
	   * @returns {RegExp}
	   */
	  function cloneRegex(pattern) {
	    return eval("" + pattern + (!pattern.global ? "g" : ""));
	  };

	  /**
	   * A collection of unique elements.
	   *
	   * @private
	   * @constructor
	   *
	   * @examples
	   * var set  = new Set(),
	   *     obj1 = {},
	   *     obj2 = {},
	   *     fn1 = function fn1() {},
	   *     fn2 = function fn2() {};
	   *
	   * set.add('foo')            // => true
	   * set.add('foo')            // => false
	   * set.add(1)                // => true
	   * set.add(1)                // => false
	   * set.add('1')              // => true
	   * set.add('1')              // => false
	   * set.add(obj1)             // => true
	   * set.add(obj1)             // => false
	   * set.add(obj2)             // => true
	   * set.add(fn1)              // => true
	   * set.add(fn2)              // => true
	   * set.add(fn2)              // => false
	   * set.contains('__proto__') // => false
	   * set.add('__proto__')      // => true
	   * set.add('__proto__')      // => false
	   * set.contains('add')       // => false
	   * set.add('add')            // => true
	   * set.add('add')            // => false
	   * set.contains(undefined)   // => false
	   * set.add(undefined)        // => true
	   * set.contains(undefined)   // => true
	   * set.contains('undefined') // => false
	   * set.add('undefined')      // => true
	   * set.contains('undefined') // => true
	   * set.contains(NaN)         // => false
	   * set.add(NaN)              // => true
	   * set.contains(NaN)         // => true
	   * set.contains('NaN')       // => false
	   * set.add('NaN')            // => true
	   * set.contains('NaN')       // => true
	   * set.contains('@foo')      // => false
	   * set.add('@foo')           // => true
	   * set.contains('@foo')      // => true
	   */
	  function Set() {
	    this.table   = {};
	    this.objects = [];
	  }

	  /**
	   * Attempts to add a unique value to the set.
	   *
	   * @param {*} value The value to add.
	   * @returns {boolean} True if the value was added to the set (meaning an equal
	   *     value was not already present), or else false.
	   */
	  Set.prototype.add = function add(value) {
	    var table = this.table,
	        type  = typeof value,

	        // only applies for strings
	        firstChar,

	        // only applies for objects
	        objects;

	    switch (type) {
	      case "number":
	      case "boolean":
	      case "undefined":
	        if (!table[value]) {
	          table[value] = true;
	          return true;
	        }
	        return false;

	      case "string":
	        // Essentially, escape the first character if it could possibly collide
	        // with a number, boolean, or undefined (or a string that happens to start
	        // with the escape character!), OR if it could override a special property
	        // such as '__proto__' or 'constructor'.
	        switch (value.charAt(0)) {
	          case "_": // e.g., __proto__
	          case "f": // for 'false'
	          case "t": // for 'true'
	          case "c": // for 'constructor'
	          case "u": // for 'undefined'
	          case "@": // escaped
	          case "0":
	          case "1":
	          case "2":
	          case "3":
	          case "4":
	          case "5":
	          case "6":
	          case "7":
	          case "8":
	          case "9":
	          case "N": // for NaN
	            value = "@" + value;
	        }
	        if (!table[value]) {
	          table[value] = true;
	          return true;
	        }
	        return false;

	      default:
	        // For objects and functions, we can't really do anything other than store
	        // them in an array and do a linear search for reference equality.
	        objects = this.objects;
	        if (!arrayContains(objects, value)) {
	          objects.push(value);
	          return true;
	        }
	        return false;
	    }
	  };

	  /**
	   * Checks whether the set contains a value.
	   *
	   * @param {*} value The value to check for.
	   * @returns {boolean} True if the set contains the value, or else false.
	   */
	  Set.prototype.contains = function contains(value) {
	    var type = typeof value,

	        // only applies for strings
	        firstChar;

	    switch (type) {
	      case "number":
	      case "boolean":
	      case "undefined":
	        return !!this.table[value];

	      case "string":
	        // Essentially, escape the first character if it could possibly collide
	        // with a number, boolean, or undefined (or a string that happens to start
	        // with the escape character!), OR if it could override a special property
	        // such as '__proto__' or 'constructor'.
	        switch (value.charAt(0)) {
	          case "_": // e.g., __proto__
	          case "f": // for 'false'
	          case "t": // for 'true'
	          case "c": // for 'constructor'
	          case "u": // for 'undefined'
	          case "@": // escaped
	          case "0":
	          case "1":
	          case "2":
	          case "3":
	          case "4":
	          case "5":
	          case "6":
	          case "7":
	          case "8":
	          case "9":
	          case "N": // for NaN
	            value = "@" + value;
	        }
	        return !!this.table[value];

	      default:
	        // For objects and functions, we can't really do anything other than store
	        // them in an array and do a linear search for reference equality.
	        return arrayContains(this.objects, value);
	    }
	  };

	  /**
	   * A "rolling" queue, with a fixed capacity. As items are added to the head,
	   * excess items are dropped from the tail.
	   *
	   * @private
	   * @constructor
	   *
	   * @examples
	   * var queue = new Queue(3);
	   *
	   * queue.add(1).toArray()        // => [1]
	   * queue.add(2).toArray()        // => [1, 2]
	   * queue.add(3).toArray()        // => [1, 2, 3]
	   * queue.add(4).toArray()        // => [2, 3, 4]
	   * queue.add(5).add(6).toArray() // => [4, 5, 6]
	   * queue.add(7).add(8).toArray() // => [6, 7, 8]
	   *
	   * // also want to check corner cases
	   * new Queue(1).add('foo').add('bar').toArray() // => ['bar']
	   * new Queue(0).add('foo').toArray()            // => []
	   * new Queue(-1)                                // throws
	   *
	   * @benchmarks
	   * function populateQueue(count, capacity) {
	   *   var q = new Queue(capacity);
	   *   for (var i = 0; i < count; ++i) {
	   *     q.add(i);
	   *   }
	   * }
	   *
	   * function populateArray(count, capacity) {
	   *   var arr = [];
	   *   for (var i = 0; i < count; ++i) {
	   *     if (arr.length === capacity) { arr.shift(); }
	   *     arr.push(i);
	   *   }
	   * }
	   *
	   * populateQueue(100, 10); // populating a Queue
	   * populateArray(100, 10); // populating an Array
	   */
	  function Queue(capacity) {
	    this.contents = new Array(capacity);
	    this.start    = 0;
	    this.count    = 0;
	  }

	  /**
	   * Adds an item to the queue, and returns the queue.
	   */
	  Queue.prototype.add = function add(element) {
	    var contents = this.contents,
	        capacity = contents.length,
	        start    = this.start;

	    if (this.count === capacity) {
	      contents[start] = element;
	      this.start = (start + 1) % capacity;

	    } else {
	      contents[this.count++] = element;
	    }

	    return this;
	  };

	  /**
	   * Returns an array containing snapshot of the queue's contents.
	   */
	  Queue.prototype.toArray = function toArray() {
	    var contents = this.contents,
	        start    = this.start,
	        count    = this.count;

	    var snapshot = contents.slice(start, start + count);
	    if (snapshot.length < count) {
	      snapshot = snapshot.concat(contents.slice(0, count - snapshot.length));
	    }

	    return snapshot;
	  };

	  /**
	   * Shared base method for defining new sequence types.
	   */
	  function defineSequenceType(base, name, overrides) {
	    /** @constructor */
	    var ctor = function ctor() {};

	    // Make this type inherit from the specified base.
	    ctor.prototype = new base();

	    // Attach overrides to the new sequence type's prototype.
	    for (var override in overrides) {
	      ctor.prototype[override] = overrides[override];
	    }

	    // Define a factory method that sets the new sequence's parent to the caller
	    // and (optionally) applies any additional initialization logic.
	    // Expose this as a chainable method so that we can do:
	    // Lazy(...).map(...).filter(...).blah(...);
	    var factory = function factory() {
	      var sequence = new ctor();

	      // Every sequence needs a reference to its parent in order to work.
	      sequence.parent = this;

	      // If a custom init function was supplied, call it now.
	      if (sequence.init) {
	        sequence.init.apply(sequence, arguments);
	      }

	      return sequence;
	    };

	    var methodNames = typeof name === 'string' ? [name] : name;
	    for (var i = 0; i < methodNames.length; ++i) {
	      base.prototype[methodNames[i]] = factory;
	    }

	    return ctor;
	  }

	  return Lazy;
	});

	/* WEBPACK VAR INJECTION */}.call(exports, __webpack_require__(227).setImmediate, __webpack_require__(227).clearImmediate))

/***/ },
/* 227 */
/***/ function(module, exports, __webpack_require__) {

	/* WEBPACK VAR INJECTION */(function(setImmediate, clearImmediate) {var nextTick = __webpack_require__(228).nextTick;
	var apply = Function.prototype.apply;
	var slice = Array.prototype.slice;
	var immediateIds = {};
	var nextImmediateId = 0;

	// DOM APIs, for completeness

	exports.setTimeout = function() {
	  return new Timeout(apply.call(setTimeout, window, arguments), clearTimeout);
	};
	exports.setInterval = function() {
	  return new Timeout(apply.call(setInterval, window, arguments), clearInterval);
	};
	exports.clearTimeout =
	exports.clearInterval = function(timeout) { timeout.close(); };

	function Timeout(id, clearFn) {
	  this._id = id;
	  this._clearFn = clearFn;
	}
	Timeout.prototype.unref = Timeout.prototype.ref = function() {};
	Timeout.prototype.close = function() {
	  this._clearFn.call(window, this._id);
	};

	// Does not start the time, just sets up the members needed.
	exports.enroll = function(item, msecs) {
	  clearTimeout(item._idleTimeoutId);
	  item._idleTimeout = msecs;
	};

	exports.unenroll = function(item) {
	  clearTimeout(item._idleTimeoutId);
	  item._idleTimeout = -1;
	};

	exports._unrefActive = exports.active = function(item) {
	  clearTimeout(item._idleTimeoutId);

	  var msecs = item._idleTimeout;
	  if (msecs >= 0) {
	    item._idleTimeoutId = setTimeout(function onTimeout() {
	      if (item._onTimeout)
	        item._onTimeout();
	    }, msecs);
	  }
	};

	// That's not how node.js implements it but the exposed api is the same.
	exports.setImmediate = typeof setImmediate === "function" ? setImmediate : function(fn) {
	  var id = nextImmediateId++;
	  var args = arguments.length < 2 ? false : slice.call(arguments, 1);

	  immediateIds[id] = true;

	  nextTick(function onNextTick() {
	    if (immediateIds[id]) {
	      // fn.call() is faster so we optimize for the common use-case
	      // @see http://jsperf.com/call-apply-segu
	      if (args) {
	        fn.apply(null, args);
	      } else {
	        fn.call(null);
	      }
	      // Prevent ids from leaking
	      exports.clearImmediate(id);
	    }
	  });

	  return id;
	};

	exports.clearImmediate = typeof clearImmediate === "function" ? clearImmediate : function(id) {
	  delete immediateIds[id];
	};
	/* WEBPACK VAR INJECTION */}.call(exports, __webpack_require__(227).setImmediate, __webpack_require__(227).clearImmediate))

/***/ },
/* 228 */
/***/ function(module, exports) {

	// shim for using process in browser

	var process = module.exports = {};
	var queue = [];
	var draining = false;
	var currentQueue;
	var queueIndex = -1;

	function cleanUpNextTick() {
	    draining = false;
	    if (currentQueue.length) {
	        queue = currentQueue.concat(queue);
	    } else {
	        queueIndex = -1;
	    }
	    if (queue.length) {
	        drainQueue();
	    }
	}

	function drainQueue() {
	    if (draining) {
	        return;
	    }
	    var timeout = setTimeout(cleanUpNextTick);
	    draining = true;

	    var len = queue.length;
	    while(len) {
	        currentQueue = queue;
	        queue = [];
	        while (++queueIndex < len) {
	            if (currentQueue) {
	                currentQueue[queueIndex].run();
	            }
	        }
	        queueIndex = -1;
	        len = queue.length;
	    }
	    currentQueue = null;
	    draining = false;
	    clearTimeout(timeout);
	}

	process.nextTick = function (fun) {
	    var args = new Array(arguments.length - 1);
	    if (arguments.length > 1) {
	        for (var i = 1; i < arguments.length; i++) {
	            args[i - 1] = arguments[i];
	        }
	    }
	    queue.push(new Item(fun, args));
	    if (queue.length === 1 && !draining) {
	        setTimeout(drainQueue, 0);
	    }
	};

	// v8 likes predictible objects
	function Item(fun, array) {
	    this.fun = fun;
	    this.array = array;
	}
	Item.prototype.run = function () {
	    this.fun.apply(null, this.array);
	};
	process.title = 'browser';
	process.browser = true;
	process.env = {};
	process.argv = [];
	process.version = ''; // empty string to avoid regexp issues
	process.versions = {};

	function noop() {}

	process.on = noop;
	process.addListener = noop;
	process.once = noop;
	process.off = noop;
	process.removeListener = noop;
	process.removeAllListeners = noop;
	process.emit = noop;

	process.binding = function (name) {
	    throw new Error('process.binding is not supported');
	};

	process.cwd = function () { return '/' };
	process.chdir = function (dir) {
	    throw new Error('process.chdir is not supported');
	};
	process.umask = function() { return 0; };


/***/ },
/* 229 */
/***/ function(module, exports, __webpack_require__) {

	/* WEBPACK VAR INJECTION */(function(Buffer, global) {/*!
	 * The buffer module from node.js, for the browser.
	 *
	 * @author   Feross Aboukhadijeh <feross@feross.org> <http://feross.org>
	 * @license  MIT
	 */
	/* eslint-disable no-proto */

	'use strict'

	var base64 = __webpack_require__(230)
	var ieee754 = __webpack_require__(231)
	var isArray = __webpack_require__(232)

	exports.Buffer = Buffer
	exports.SlowBuffer = SlowBuffer
	exports.INSPECT_MAX_BYTES = 50

	/**
	 * If `Buffer.TYPED_ARRAY_SUPPORT`:
	 *   === true    Use Uint8Array implementation (fastest)
	 *   === false   Use Object implementation (most compatible, even IE6)
	 *
	 * Browsers that support typed arrays are IE 10+, Firefox 4+, Chrome 7+, Safari 5.1+,
	 * Opera 11.6+, iOS 4.2+.
	 *
	 * Due to various browser bugs, sometimes the Object implementation will be used even
	 * when the browser supports typed arrays.
	 *
	 * Note:
	 *
	 *   - Firefox 4-29 lacks support for adding new properties to `Uint8Array` instances,
	 *     See: https://bugzilla.mozilla.org/show_bug.cgi?id=695438.
	 *
	 *   - Chrome 9-10 is missing the `TypedArray.prototype.subarray` function.
	 *
	 *   - IE10 has a broken `TypedArray.prototype.subarray` function which returns arrays of
	 *     incorrect length in some situations.

	 * We detect these buggy browsers and set `Buffer.TYPED_ARRAY_SUPPORT` to `false` so they
	 * get the Object implementation, which is slower but behaves correctly.
	 */
	Buffer.TYPED_ARRAY_SUPPORT = global.TYPED_ARRAY_SUPPORT !== undefined
	  ? global.TYPED_ARRAY_SUPPORT
	  : typedArraySupport()

	/*
	 * Export kMaxLength after typed array support is determined.
	 */
	exports.kMaxLength = kMaxLength()

	function typedArraySupport () {
	  try {
	    var arr = new Uint8Array(1)
	    arr.foo = function () { return 42 }
	    return arr.foo() === 42 && // typed array instances can be augmented
	        typeof arr.subarray === 'function' && // chrome 9-10 lack `subarray`
	        arr.subarray(1, 1).byteLength === 0 // ie10 has broken `subarray`
	  } catch (e) {
	    return false
	  }
	}

	function kMaxLength () {
	  return Buffer.TYPED_ARRAY_SUPPORT
	    ? 0x7fffffff
	    : 0x3fffffff
	}

	function createBuffer (that, length) {
	  if (kMaxLength() < length) {
	    throw new RangeError('Invalid typed array length')
	  }
	  if (Buffer.TYPED_ARRAY_SUPPORT) {
	    // Return an augmented `Uint8Array` instance, for best performance
	    that = new Uint8Array(length)
	    that.__proto__ = Buffer.prototype
	  } else {
	    // Fallback: Return an object instance of the Buffer class
	    if (that === null) {
	      that = new Buffer(length)
	    }
	    that.length = length
	  }

	  return that
	}

	/**
	 * The Buffer constructor returns instances of `Uint8Array` that have their
	 * prototype changed to `Buffer.prototype`. Furthermore, `Buffer` is a subclass of
	 * `Uint8Array`, so the returned instances will have all the node `Buffer` methods
	 * and the `Uint8Array` methods. Square bracket notation works as expected -- it
	 * returns a single octet.
	 *
	 * The `Uint8Array` prototype remains unmodified.
	 */

	function Buffer (arg, encodingOrOffset, length) {
	  if (!Buffer.TYPED_ARRAY_SUPPORT && !(this instanceof Buffer)) {
	    return new Buffer(arg, encodingOrOffset, length)
	  }

	  // Common case.
	  if (typeof arg === 'number') {
	    if (typeof encodingOrOffset === 'string') {
	      throw new Error(
	        'If encoding is specified then the first argument must be a string'
	      )
	    }
	    return allocUnsafe(this, arg)
	  }
	  return from(this, arg, encodingOrOffset, length)
	}

	Buffer.poolSize = 8192 // not used by this implementation

	// TODO: Legacy, not needed anymore. Remove in next major version.
	Buffer._augment = function (arr) {
	  arr.__proto__ = Buffer.prototype
	  return arr
	}

	function from (that, value, encodingOrOffset, length) {
	  if (typeof value === 'number') {
	    throw new TypeError('"value" argument must not be a number')
	  }

	  if (typeof ArrayBuffer !== 'undefined' && value instanceof ArrayBuffer) {
	    return fromArrayBuffer(that, value, encodingOrOffset, length)
	  }

	  if (typeof value === 'string') {
	    return fromString(that, value, encodingOrOffset)
	  }

	  return fromObject(that, value)
	}

	/**
	 * Functionally equivalent to Buffer(arg, encoding) but throws a TypeError
	 * if value is a number.
	 * Buffer.from(str[, encoding])
	 * Buffer.from(array)
	 * Buffer.from(buffer)
	 * Buffer.from(arrayBuffer[, byteOffset[, length]])
	 **/
	Buffer.from = function (value, encodingOrOffset, length) {
	  return from(null, value, encodingOrOffset, length)
	}

	if (Buffer.TYPED_ARRAY_SUPPORT) {
	  Buffer.prototype.__proto__ = Uint8Array.prototype
	  Buffer.__proto__ = Uint8Array
	  if (typeof Symbol !== 'undefined' && Symbol.species &&
	      Buffer[Symbol.species] === Buffer) {
	    // Fix subarray() in ES2016. See: https://github.com/feross/buffer/pull/97
	    Object.defineProperty(Buffer, Symbol.species, {
	      value: null,
	      configurable: true
	    })
	  }
	}

	function assertSize (size) {
	  if (typeof size !== 'number') {
	    throw new TypeError('"size" argument must be a number')
	  }
	}

	function alloc (that, size, fill, encoding) {
	  assertSize(size)
	  if (size <= 0) {
	    return createBuffer(that, size)
	  }
	  if (fill !== undefined) {
	    // Only pay attention to encoding if it's a string. This
	    // prevents accidentally sending in a number that would
	    // be interpretted as a start offset.
	    return typeof encoding === 'string'
	      ? createBuffer(that, size).fill(fill, encoding)
	      : createBuffer(that, size).fill(fill)
	  }
	  return createBuffer(that, size)
	}

	/**
	 * Creates a new filled Buffer instance.
	 * alloc(size[, fill[, encoding]])
	 **/
	Buffer.alloc = function (size, fill, encoding) {
	  return alloc(null, size, fill, encoding)
	}

	function allocUnsafe (that, size) {
	  assertSize(size)
	  that = createBuffer(that, size < 0 ? 0 : checked(size) | 0)
	  if (!Buffer.TYPED_ARRAY_SUPPORT) {
	    for (var i = 0; i < size; i++) {
	      that[i] = 0
	    }
	  }
	  return that
	}

	/**
	 * Equivalent to Buffer(num), by default creates a non-zero-filled Buffer instance.
	 * */
	Buffer.allocUnsafe = function (size) {
	  return allocUnsafe(null, size)
	}
	/**
	 * Equivalent to SlowBuffer(num), by default creates a non-zero-filled Buffer instance.
	 */
	Buffer.allocUnsafeSlow = function (size) {
	  return allocUnsafe(null, size)
	}

	function fromString (that, string, encoding) {
	  if (typeof encoding !== 'string' || encoding === '') {
	    encoding = 'utf8'
	  }

	  if (!Buffer.isEncoding(encoding)) {
	    throw new TypeError('"encoding" must be a valid string encoding')
	  }

	  var length = byteLength(string, encoding) | 0
	  that = createBuffer(that, length)

	  that.write(string, encoding)
	  return that
	}

	function fromArrayLike (that, array) {
	  var length = checked(array.length) | 0
	  that = createBuffer(that, length)
	  for (var i = 0; i < length; i += 1) {
	    that[i] = array[i] & 255
	  }
	  return that
	}

	function fromArrayBuffer (that, array, byteOffset, length) {
	  array.byteLength // this throws if `array` is not a valid ArrayBuffer

	  if (byteOffset < 0 || array.byteLength < byteOffset) {
	    throw new RangeError('\'offset\' is out of bounds')
	  }

	  if (array.byteLength < byteOffset + (length || 0)) {
	    throw new RangeError('\'length\' is out of bounds')
	  }

	  if (length === undefined) {
	    array = new Uint8Array(array, byteOffset)
	  } else {
	    array = new Uint8Array(array, byteOffset, length)
	  }

	  if (Buffer.TYPED_ARRAY_SUPPORT) {
	    // Return an augmented `Uint8Array` instance, for best performance
	    that = array
	    that.__proto__ = Buffer.prototype
	  } else {
	    // Fallback: Return an object instance of the Buffer class
	    that = fromArrayLike(that, array)
	  }
	  return that
	}

	function fromObject (that, obj) {
	  if (Buffer.isBuffer(obj)) {
	    var len = checked(obj.length) | 0
	    that = createBuffer(that, len)

	    if (that.length === 0) {
	      return that
	    }

	    obj.copy(that, 0, 0, len)
	    return that
	  }

	  if (obj) {
	    if ((typeof ArrayBuffer !== 'undefined' &&
	        obj.buffer instanceof ArrayBuffer) || 'length' in obj) {
	      if (typeof obj.length !== 'number' || isnan(obj.length)) {
	        return createBuffer(that, 0)
	      }
	      return fromArrayLike(that, obj)
	    }

	    if (obj.type === 'Buffer' && isArray(obj.data)) {
	      return fromArrayLike(that, obj.data)
	    }
	  }

	  throw new TypeError('First argument must be a string, Buffer, ArrayBuffer, Array, or array-like object.')
	}

	function checked (length) {
	  // Note: cannot use `length < kMaxLength` here because that fails when
	  // length is NaN (which is otherwise coerced to zero.)
	  if (length >= kMaxLength()) {
	    throw new RangeError('Attempt to allocate Buffer larger than maximum ' +
	                         'size: 0x' + kMaxLength().toString(16) + ' bytes')
	  }
	  return length | 0
	}

	function SlowBuffer (length) {
	  if (+length != length) { // eslint-disable-line eqeqeq
	    length = 0
	  }
	  return Buffer.alloc(+length)
	}

	Buffer.isBuffer = function isBuffer (b) {
	  return !!(b != null && b._isBuffer)
	}

	Buffer.compare = function compare (a, b) {
	  if (!Buffer.isBuffer(a) || !Buffer.isBuffer(b)) {
	    throw new TypeError('Arguments must be Buffers')
	  }

	  if (a === b) return 0

	  var x = a.length
	  var y = b.length

	  for (var i = 0, len = Math.min(x, y); i < len; ++i) {
	    if (a[i] !== b[i]) {
	      x = a[i]
	      y = b[i]
	      break
	    }
	  }

	  if (x < y) return -1
	  if (y < x) return 1
	  return 0
	}

	Buffer.isEncoding = function isEncoding (encoding) {
	  switch (String(encoding).toLowerCase()) {
	    case 'hex':
	    case 'utf8':
	    case 'utf-8':
	    case 'ascii':
	    case 'binary':
	    case 'base64':
	    case 'raw':
	    case 'ucs2':
	    case 'ucs-2':
	    case 'utf16le':
	    case 'utf-16le':
	      return true
	    default:
	      return false
	  }
	}

	Buffer.concat = function concat (list, length) {
	  if (!isArray(list)) {
	    throw new TypeError('"list" argument must be an Array of Buffers')
	  }

	  if (list.length === 0) {
	    return Buffer.alloc(0)
	  }

	  var i
	  if (length === undefined) {
	    length = 0
	    for (i = 0; i < list.length; i++) {
	      length += list[i].length
	    }
	  }

	  var buffer = Buffer.allocUnsafe(length)
	  var pos = 0
	  for (i = 0; i < list.length; i++) {
	    var buf = list[i]
	    if (!Buffer.isBuffer(buf)) {
	      throw new TypeError('"list" argument must be an Array of Buffers')
	    }
	    buf.copy(buffer, pos)
	    pos += buf.length
	  }
	  return buffer
	}

	function byteLength (string, encoding) {
	  if (Buffer.isBuffer(string)) {
	    return string.length
	  }
	  if (typeof ArrayBuffer !== 'undefined' && typeof ArrayBuffer.isView === 'function' &&
	      (ArrayBuffer.isView(string) || string instanceof ArrayBuffer)) {
	    return string.byteLength
	  }
	  if (typeof string !== 'string') {
	    string = '' + string
	  }

	  var len = string.length
	  if (len === 0) return 0

	  // Use a for loop to avoid recursion
	  var loweredCase = false
	  for (;;) {
	    switch (encoding) {
	      case 'ascii':
	      case 'binary':
	      // Deprecated
	      case 'raw':
	      case 'raws':
	        return len
	      case 'utf8':
	      case 'utf-8':
	      case undefined:
	        return utf8ToBytes(string).length
	      case 'ucs2':
	      case 'ucs-2':
	      case 'utf16le':
	      case 'utf-16le':
	        return len * 2
	      case 'hex':
	        return len >>> 1
	      case 'base64':
	        return base64ToBytes(string).length
	      default:
	        if (loweredCase) return utf8ToBytes(string).length // assume utf8
	        encoding = ('' + encoding).toLowerCase()
	        loweredCase = true
	    }
	  }
	}
	Buffer.byteLength = byteLength

	function slowToString (encoding, start, end) {
	  var loweredCase = false

	  // No need to verify that "this.length <= MAX_UINT32" since it's a read-only
	  // property of a typed array.

	  // This behaves neither like String nor Uint8Array in that we set start/end
	  // to their upper/lower bounds if the value passed is out of range.
	  // undefined is handled specially as per ECMA-262 6th Edition,
	  // Section 13.3.3.7 Runtime Semantics: KeyedBindingInitialization.
	  if (start === undefined || start < 0) {
	    start = 0
	  }
	  // Return early if start > this.length. Done here to prevent potential uint32
	  // coercion fail below.
	  if (start > this.length) {
	    return ''
	  }

	  if (end === undefined || end > this.length) {
	    end = this.length
	  }

	  if (end <= 0) {
	    return ''
	  }

	  // Force coersion to uint32. This will also coerce falsey/NaN values to 0.
	  end >>>= 0
	  start >>>= 0

	  if (end <= start) {
	    return ''
	  }

	  if (!encoding) encoding = 'utf8'

	  while (true) {
	    switch (encoding) {
	      case 'hex':
	        return hexSlice(this, start, end)

	      case 'utf8':
	      case 'utf-8':
	        return utf8Slice(this, start, end)

	      case 'ascii':
	        return asciiSlice(this, start, end)

	      case 'binary':
	        return binarySlice(this, start, end)

	      case 'base64':
	        return base64Slice(this, start, end)

	      case 'ucs2':
	      case 'ucs-2':
	      case 'utf16le':
	      case 'utf-16le':
	        return utf16leSlice(this, start, end)

	      default:
	        if (loweredCase) throw new TypeError('Unknown encoding: ' + encoding)
	        encoding = (encoding + '').toLowerCase()
	        loweredCase = true
	    }
	  }
	}

	// The property is used by `Buffer.isBuffer` and `is-buffer` (in Safari 5-7) to detect
	// Buffer instances.
	Buffer.prototype._isBuffer = true

	function swap (b, n, m) {
	  var i = b[n]
	  b[n] = b[m]
	  b[m] = i
	}

	Buffer.prototype.swap16 = function swap16 () {
	  var len = this.length
	  if (len % 2 !== 0) {
	    throw new RangeError('Buffer size must be a multiple of 16-bits')
	  }
	  for (var i = 0; i < len; i += 2) {
	    swap(this, i, i + 1)
	  }
	  return this
	}

	Buffer.prototype.swap32 = function swap32 () {
	  var len = this.length
	  if (len % 4 !== 0) {
	    throw new RangeError('Buffer size must be a multiple of 32-bits')
	  }
	  for (var i = 0; i < len; i += 4) {
	    swap(this, i, i + 3)
	    swap(this, i + 1, i + 2)
	  }
	  return this
	}

	Buffer.prototype.toString = function toString () {
	  var length = this.length | 0
	  if (length === 0) return ''
	  if (arguments.length === 0) return utf8Slice(this, 0, length)
	  return slowToString.apply(this, arguments)
	}

	Buffer.prototype.equals = function equals (b) {
	  if (!Buffer.isBuffer(b)) throw new TypeError('Argument must be a Buffer')
	  if (this === b) return true
	  return Buffer.compare(this, b) === 0
	}

	Buffer.prototype.inspect = function inspect () {
	  var str = ''
	  var max = exports.INSPECT_MAX_BYTES
	  if (this.length > 0) {
	    str = this.toString('hex', 0, max).match(/.{2}/g).join(' ')
	    if (this.length > max) str += ' ... '
	  }
	  return '<Buffer ' + str + '>'
	}

	Buffer.prototype.compare = function compare (target, start, end, thisStart, thisEnd) {
	  if (!Buffer.isBuffer(target)) {
	    throw new TypeError('Argument must be a Buffer')
	  }

	  if (start === undefined) {
	    start = 0
	  }
	  if (end === undefined) {
	    end = target ? target.length : 0
	  }
	  if (thisStart === undefined) {
	    thisStart = 0
	  }
	  if (thisEnd === undefined) {
	    thisEnd = this.length
	  }

	  if (start < 0 || end > target.length || thisStart < 0 || thisEnd > this.length) {
	    throw new RangeError('out of range index')
	  }

	  if (thisStart >= thisEnd && start >= end) {
	    return 0
	  }
	  if (thisStart >= thisEnd) {
	    return -1
	  }
	  if (start >= end) {
	    return 1
	  }

	  start >>>= 0
	  end >>>= 0
	  thisStart >>>= 0
	  thisEnd >>>= 0

	  if (this === target) return 0

	  var x = thisEnd - thisStart
	  var y = end - start
	  var len = Math.min(x, y)

	  var thisCopy = this.slice(thisStart, thisEnd)
	  var targetCopy = target.slice(start, end)

	  for (var i = 0; i < len; ++i) {
	    if (thisCopy[i] !== targetCopy[i]) {
	      x = thisCopy[i]
	      y = targetCopy[i]
	      break
	    }
	  }

	  if (x < y) return -1
	  if (y < x) return 1
	  return 0
	}

	function arrayIndexOf (arr, val, byteOffset, encoding) {
	  var indexSize = 1
	  var arrLength = arr.length
	  var valLength = val.length

	  if (encoding !== undefined) {
	    encoding = String(encoding).toLowerCase()
	    if (encoding === 'ucs2' || encoding === 'ucs-2' ||
	        encoding === 'utf16le' || encoding === 'utf-16le') {
	      if (arr.length < 2 || val.length < 2) {
	        return -1
	      }
	      indexSize = 2
	      arrLength /= 2
	      valLength /= 2
	      byteOffset /= 2
	    }
	  }

	  function read (buf, i) {
	    if (indexSize === 1) {
	      return buf[i]
	    } else {
	      return buf.readUInt16BE(i * indexSize)
	    }
	  }

	  var foundIndex = -1
	  for (var i = 0; byteOffset + i < arrLength; i++) {
	    if (read(arr, byteOffset + i) === read(val, foundIndex === -1 ? 0 : i - foundIndex)) {
	      if (foundIndex === -1) foundIndex = i
	      if (i - foundIndex + 1 === valLength) return (byteOffset + foundIndex) * indexSize
	    } else {
	      if (foundIndex !== -1) i -= i - foundIndex
	      foundIndex = -1
	    }
	  }
	  return -1
	}

	Buffer.prototype.indexOf = function indexOf (val, byteOffset, encoding) {
	  if (typeof byteOffset === 'string') {
	    encoding = byteOffset
	    byteOffset = 0
	  } else if (byteOffset > 0x7fffffff) {
	    byteOffset = 0x7fffffff
	  } else if (byteOffset < -0x80000000) {
	    byteOffset = -0x80000000
	  }
	  byteOffset >>= 0

	  if (this.length === 0) return -1
	  if (byteOffset >= this.length) return -1

	  // Negative offsets start from the end of the buffer
	  if (byteOffset < 0) byteOffset = Math.max(this.length + byteOffset, 0)

	  if (typeof val === 'string') {
	    val = Buffer.from(val, encoding)
	  }

	  if (Buffer.isBuffer(val)) {
	    // special case: looking for empty string/buffer always fails
	    if (val.length === 0) {
	      return -1
	    }
	    return arrayIndexOf(this, val, byteOffset, encoding)
	  }
	  if (typeof val === 'number') {
	    if (Buffer.TYPED_ARRAY_SUPPORT && Uint8Array.prototype.indexOf === 'function') {
	      return Uint8Array.prototype.indexOf.call(this, val, byteOffset)
	    }
	    return arrayIndexOf(this, [ val ], byteOffset, encoding)
	  }

	  throw new TypeError('val must be string, number or Buffer')
	}

	Buffer.prototype.includes = function includes (val, byteOffset, encoding) {
	  return this.indexOf(val, byteOffset, encoding) !== -1
	}

	function hexWrite (buf, string, offset, length) {
	  offset = Number(offset) || 0
	  var remaining = buf.length - offset
	  if (!length) {
	    length = remaining
	  } else {
	    length = Number(length)
	    if (length > remaining) {
	      length = remaining
	    }
	  }

	  // must be an even number of digits
	  var strLen = string.length
	  if (strLen % 2 !== 0) throw new Error('Invalid hex string')

	  if (length > strLen / 2) {
	    length = strLen / 2
	  }
	  for (var i = 0; i < length; i++) {
	    var parsed = parseInt(string.substr(i * 2, 2), 16)
	    if (isNaN(parsed)) return i
	    buf[offset + i] = parsed
	  }
	  return i
	}

	function utf8Write (buf, string, offset, length) {
	  return blitBuffer(utf8ToBytes(string, buf.length - offset), buf, offset, length)
	}

	function asciiWrite (buf, string, offset, length) {
	  return blitBuffer(asciiToBytes(string), buf, offset, length)
	}

	function binaryWrite (buf, string, offset, length) {
	  return asciiWrite(buf, string, offset, length)
	}

	function base64Write (buf, string, offset, length) {
	  return blitBuffer(base64ToBytes(string), buf, offset, length)
	}

	function ucs2Write (buf, string, offset, length) {
	  return blitBuffer(utf16leToBytes(string, buf.length - offset), buf, offset, length)
	}

	Buffer.prototype.write = function write (string, offset, length, encoding) {
	  // Buffer#write(string)
	  if (offset === undefined) {
	    encoding = 'utf8'
	    length = this.length
	    offset = 0
	  // Buffer#write(string, encoding)
	  } else if (length === undefined && typeof offset === 'string') {
	    encoding = offset
	    length = this.length
	    offset = 0
	  // Buffer#write(string, offset[, length][, encoding])
	  } else if (isFinite(offset)) {
	    offset = offset | 0
	    if (isFinite(length)) {
	      length = length | 0
	      if (encoding === undefined) encoding = 'utf8'
	    } else {
	      encoding = length
	      length = undefined
	    }
	  // legacy write(string, encoding, offset, length) - remove in v0.13
	  } else {
	    throw new Error(
	      'Buffer.write(string, encoding, offset[, length]) is no longer supported'
	    )
	  }

	  var remaining = this.length - offset
	  if (length === undefined || length > remaining) length = remaining

	  if ((string.length > 0 && (length < 0 || offset < 0)) || offset > this.length) {
	    throw new RangeError('Attempt to write outside buffer bounds')
	  }

	  if (!encoding) encoding = 'utf8'

	  var loweredCase = false
	  for (;;) {
	    switch (encoding) {
	      case 'hex':
	        return hexWrite(this, string, offset, length)

	      case 'utf8':
	      case 'utf-8':
	        return utf8Write(this, string, offset, length)

	      case 'ascii':
	        return asciiWrite(this, string, offset, length)

	      case 'binary':
	        return binaryWrite(this, string, offset, length)

	      case 'base64':
	        // Warning: maxLength not taken into account in base64Write
	        return base64Write(this, string, offset, length)

	      case 'ucs2':
	      case 'ucs-2':
	      case 'utf16le':
	      case 'utf-16le':
	        return ucs2Write(this, string, offset, length)

	      default:
	        if (loweredCase) throw new TypeError('Unknown encoding: ' + encoding)
	        encoding = ('' + encoding).toLowerCase()
	        loweredCase = true
	    }
	  }
	}

	Buffer.prototype.toJSON = function toJSON () {
	  return {
	    type: 'Buffer',
	    data: Array.prototype.slice.call(this._arr || this, 0)
	  }
	}

	function base64Slice (buf, start, end) {
	  if (start === 0 && end === buf.length) {
	    return base64.fromByteArray(buf)
	  } else {
	    return base64.fromByteArray(buf.slice(start, end))
	  }
	}

	function utf8Slice (buf, start, end) {
	  end = Math.min(buf.length, end)
	  var res = []

	  var i = start
	  while (i < end) {
	    var firstByte = buf[i]
	    var codePoint = null
	    var bytesPerSequence = (firstByte > 0xEF) ? 4
	      : (firstByte > 0xDF) ? 3
	      : (firstByte > 0xBF) ? 2
	      : 1

	    if (i + bytesPerSequence <= end) {
	      var secondByte, thirdByte, fourthByte, tempCodePoint

	      switch (bytesPerSequence) {
	        case 1:
	          if (firstByte < 0x80) {
	            codePoint = firstByte
	          }
	          break
	        case 2:
	          secondByte = buf[i + 1]
	          if ((secondByte & 0xC0) === 0x80) {
	            tempCodePoint = (firstByte & 0x1F) << 0x6 | (secondByte & 0x3F)
	            if (tempCodePoint > 0x7F) {
	              codePoint = tempCodePoint
	            }
	          }
	          break
	        case 3:
	          secondByte = buf[i + 1]
	          thirdByte = buf[i + 2]
	          if ((secondByte & 0xC0) === 0x80 && (thirdByte & 0xC0) === 0x80) {
	            tempCodePoint = (firstByte & 0xF) << 0xC | (secondByte & 0x3F) << 0x6 | (thirdByte & 0x3F)
	            if (tempCodePoint > 0x7FF && (tempCodePoint < 0xD800 || tempCodePoint > 0xDFFF)) {
	              codePoint = tempCodePoint
	            }
	          }
	          break
	        case 4:
	          secondByte = buf[i + 1]
	          thirdByte = buf[i + 2]
	          fourthByte = buf[i + 3]
	          if ((secondByte & 0xC0) === 0x80 && (thirdByte & 0xC0) === 0x80 && (fourthByte & 0xC0) === 0x80) {
	            tempCodePoint = (firstByte & 0xF) << 0x12 | (secondByte & 0x3F) << 0xC | (thirdByte & 0x3F) << 0x6 | (fourthByte & 0x3F)
	            if (tempCodePoint > 0xFFFF && tempCodePoint < 0x110000) {
	              codePoint = tempCodePoint
	            }
	          }
	      }
	    }

	    if (codePoint === null) {
	      // we did not generate a valid codePoint so insert a
	      // replacement char (U+FFFD) and advance only 1 byte
	      codePoint = 0xFFFD
	      bytesPerSequence = 1
	    } else if (codePoint > 0xFFFF) {
	      // encode to utf16 (surrogate pair dance)
	      codePoint -= 0x10000
	      res.push(codePoint >>> 10 & 0x3FF | 0xD800)
	      codePoint = 0xDC00 | codePoint & 0x3FF
	    }

	    res.push(codePoint)
	    i += bytesPerSequence
	  }

	  return decodeCodePointsArray(res)
	}

	// Based on http://stackoverflow.com/a/22747272/680742, the browser with
	// the lowest limit is Chrome, with 0x10000 args.
	// We go 1 magnitude less, for safety
	var MAX_ARGUMENTS_LENGTH = 0x1000

	function decodeCodePointsArray (codePoints) {
	  var len = codePoints.length
	  if (len <= MAX_ARGUMENTS_LENGTH) {
	    return String.fromCharCode.apply(String, codePoints) // avoid extra slice()
	  }

	  // Decode in chunks to avoid "call stack size exceeded".
	  var res = ''
	  var i = 0
	  while (i < len) {
	    res += String.fromCharCode.apply(
	      String,
	      codePoints.slice(i, i += MAX_ARGUMENTS_LENGTH)
	    )
	  }
	  return res
	}

	function asciiSlice (buf, start, end) {
	  var ret = ''
	  end = Math.min(buf.length, end)

	  for (var i = start; i < end; i++) {
	    ret += String.fromCharCode(buf[i] & 0x7F)
	  }
	  return ret
	}

	function binarySlice (buf, start, end) {
	  var ret = ''
	  end = Math.min(buf.length, end)

	  for (var i = start; i < end; i++) {
	    ret += String.fromCharCode(buf[i])
	  }
	  return ret
	}

	function hexSlice (buf, start, end) {
	  var len = buf.length

	  if (!start || start < 0) start = 0
	  if (!end || end < 0 || end > len) end = len

	  var out = ''
	  for (var i = start; i < end; i++) {
	    out += toHex(buf[i])
	  }
	  return out
	}

	function utf16leSlice (buf, start, end) {
	  var bytes = buf.slice(start, end)
	  var res = ''
	  for (var i = 0; i < bytes.length; i += 2) {
	    res += String.fromCharCode(bytes[i] + bytes[i + 1] * 256)
	  }
	  return res
	}

	Buffer.prototype.slice = function slice (start, end) {
	  var len = this.length
	  start = ~~start
	  end = end === undefined ? len : ~~end

	  if (start < 0) {
	    start += len
	    if (start < 0) start = 0
	  } else if (start > len) {
	    start = len
	  }

	  if (end < 0) {
	    end += len
	    if (end < 0) end = 0
	  } else if (end > len) {
	    end = len
	  }

	  if (end < start) end = start

	  var newBuf
	  if (Buffer.TYPED_ARRAY_SUPPORT) {
	    newBuf = this.subarray(start, end)
	    newBuf.__proto__ = Buffer.prototype
	  } else {
	    var sliceLen = end - start
	    newBuf = new Buffer(sliceLen, undefined)
	    for (var i = 0; i < sliceLen; i++) {
	      newBuf[i] = this[i + start]
	    }
	  }

	  return newBuf
	}

	/*
	 * Need to make sure that buffer isn't trying to write out of bounds.
	 */
	function checkOffset (offset, ext, length) {
	  if ((offset % 1) !== 0 || offset < 0) throw new RangeError('offset is not uint')
	  if (offset + ext > length) throw new RangeError('Trying to access beyond buffer length')
	}

	Buffer.prototype.readUIntLE = function readUIntLE (offset, byteLength, noAssert) {
	  offset = offset | 0
	  byteLength = byteLength | 0
	  if (!noAssert) checkOffset(offset, byteLength, this.length)

	  var val = this[offset]
	  var mul = 1
	  var i = 0
	  while (++i < byteLength && (mul *= 0x100)) {
	    val += this[offset + i] * mul
	  }

	  return val
	}

	Buffer.prototype.readUIntBE = function readUIntBE (offset, byteLength, noAssert) {
	  offset = offset | 0
	  byteLength = byteLength | 0
	  if (!noAssert) {
	    checkOffset(offset, byteLength, this.length)
	  }

	  var val = this[offset + --byteLength]
	  var mul = 1
	  while (byteLength > 0 && (mul *= 0x100)) {
	    val += this[offset + --byteLength] * mul
	  }

	  return val
	}

	Buffer.prototype.readUInt8 = function readUInt8 (offset, noAssert) {
	  if (!noAssert) checkOffset(offset, 1, this.length)
	  return this[offset]
	}

	Buffer.prototype.readUInt16LE = function readUInt16LE (offset, noAssert) {
	  if (!noAssert) checkOffset(offset, 2, this.length)
	  return this[offset] | (this[offset + 1] << 8)
	}

	Buffer.prototype.readUInt16BE = function readUInt16BE (offset, noAssert) {
	  if (!noAssert) checkOffset(offset, 2, this.length)
	  return (this[offset] << 8) | this[offset + 1]
	}

	Buffer.prototype.readUInt32LE = function readUInt32LE (offset, noAssert) {
	  if (!noAssert) checkOffset(offset, 4, this.length)

	  return ((this[offset]) |
	      (this[offset + 1] << 8) |
	      (this[offset + 2] << 16)) +
	      (this[offset + 3] * 0x1000000)
	}

	Buffer.prototype.readUInt32BE = function readUInt32BE (offset, noAssert) {
	  if (!noAssert) checkOffset(offset, 4, this.length)

	  return (this[offset] * 0x1000000) +
	    ((this[offset + 1] << 16) |
	    (this[offset + 2] << 8) |
	    this[offset + 3])
	}

	Buffer.prototype.readIntLE = function readIntLE (offset, byteLength, noAssert) {
	  offset = offset | 0
	  byteLength = byteLength | 0
	  if (!noAssert) checkOffset(offset, byteLength, this.length)

	  var val = this[offset]
	  var mul = 1
	  var i = 0
	  while (++i < byteLength && (mul *= 0x100)) {
	    val += this[offset + i] * mul
	  }
	  mul *= 0x80

	  if (val >= mul) val -= Math.pow(2, 8 * byteLength)

	  return val
	}

	Buffer.prototype.readIntBE = function readIntBE (offset, byteLength, noAssert) {
	  offset = offset | 0
	  byteLength = byteLength | 0
	  if (!noAssert) checkOffset(offset, byteLength, this.length)

	  var i = byteLength
	  var mul = 1
	  var val = this[offset + --i]
	  while (i > 0 && (mul *= 0x100)) {
	    val += this[offset + --i] * mul
	  }
	  mul *= 0x80

	  if (val >= mul) val -= Math.pow(2, 8 * byteLength)

	  return val
	}

	Buffer.prototype.readInt8 = function readInt8 (offset, noAssert) {
	  if (!noAssert) checkOffset(offset, 1, this.length)
	  if (!(this[offset] & 0x80)) return (this[offset])
	  return ((0xff - this[offset] + 1) * -1)
	}

	Buffer.prototype.readInt16LE = function readInt16LE (offset, noAssert) {
	  if (!noAssert) checkOffset(offset, 2, this.length)
	  var val = this[offset] | (this[offset + 1] << 8)
	  return (val & 0x8000) ? val | 0xFFFF0000 : val
	}

	Buffer.prototype.readInt16BE = function readInt16BE (offset, noAssert) {
	  if (!noAssert) checkOffset(offset, 2, this.length)
	  var val = this[offset + 1] | (this[offset] << 8)
	  return (val & 0x8000) ? val | 0xFFFF0000 : val
	}

	Buffer.prototype.readInt32LE = function readInt32LE (offset, noAssert) {
	  if (!noAssert) checkOffset(offset, 4, this.length)

	  return (this[offset]) |
	    (this[offset + 1] << 8) |
	    (this[offset + 2] << 16) |
	    (this[offset + 3] << 24)
	}

	Buffer.prototype.readInt32BE = function readInt32BE (offset, noAssert) {
	  if (!noAssert) checkOffset(offset, 4, this.length)

	  return (this[offset] << 24) |
	    (this[offset + 1] << 16) |
	    (this[offset + 2] << 8) |
	    (this[offset + 3])
	}

	Buffer.prototype.readFloatLE = function readFloatLE (offset, noAssert) {
	  if (!noAssert) checkOffset(offset, 4, this.length)
	  return ieee754.read(this, offset, true, 23, 4)
	}

	Buffer.prototype.readFloatBE = function readFloatBE (offset, noAssert) {
	  if (!noAssert) checkOffset(offset, 4, this.length)
	  return ieee754.read(this, offset, false, 23, 4)
	}

	Buffer.prototype.readDoubleLE = function readDoubleLE (offset, noAssert) {
	  if (!noAssert) checkOffset(offset, 8, this.length)
	  return ieee754.read(this, offset, true, 52, 8)
	}

	Buffer.prototype.readDoubleBE = function readDoubleBE (offset, noAssert) {
	  if (!noAssert) checkOffset(offset, 8, this.length)
	  return ieee754.read(this, offset, false, 52, 8)
	}

	function checkInt (buf, value, offset, ext, max, min) {
	  if (!Buffer.isBuffer(buf)) throw new TypeError('"buffer" argument must be a Buffer instance')
	  if (value > max || value < min) throw new RangeError('"value" argument is out of bounds')
	  if (offset + ext > buf.length) throw new RangeError('Index out of range')
	}

	Buffer.prototype.writeUIntLE = function writeUIntLE (value, offset, byteLength, noAssert) {
	  value = +value
	  offset = offset | 0
	  byteLength = byteLength | 0
	  if (!noAssert) {
	    var maxBytes = Math.pow(2, 8 * byteLength) - 1
	    checkInt(this, value, offset, byteLength, maxBytes, 0)
	  }

	  var mul = 1
	  var i = 0
	  this[offset] = value & 0xFF
	  while (++i < byteLength && (mul *= 0x100)) {
	    this[offset + i] = (value / mul) & 0xFF
	  }

	  return offset + byteLength
	}

	Buffer.prototype.writeUIntBE = function writeUIntBE (value, offset, byteLength, noAssert) {
	  value = +value
	  offset = offset | 0
	  byteLength = byteLength | 0
	  if (!noAssert) {
	    var maxBytes = Math.pow(2, 8 * byteLength) - 1
	    checkInt(this, value, offset, byteLength, maxBytes, 0)
	  }

	  var i = byteLength - 1
	  var mul = 1
	  this[offset + i] = value & 0xFF
	  while (--i >= 0 && (mul *= 0x100)) {
	    this[offset + i] = (value / mul) & 0xFF
	  }

	  return offset + byteLength
	}

	Buffer.prototype.writeUInt8 = function writeUInt8 (value, offset, noAssert) {
	  value = +value
	  offset = offset | 0
	  if (!noAssert) checkInt(this, value, offset, 1, 0xff, 0)
	  if (!Buffer.TYPED_ARRAY_SUPPORT) value = Math.floor(value)
	  this[offset] = (value & 0xff)
	  return offset + 1
	}

	function objectWriteUInt16 (buf, value, offset, littleEndian) {
	  if (value < 0) value = 0xffff + value + 1
	  for (var i = 0, j = Math.min(buf.length - offset, 2); i < j; i++) {
	    buf[offset + i] = (value & (0xff << (8 * (littleEndian ? i : 1 - i)))) >>>
	      (littleEndian ? i : 1 - i) * 8
	  }
	}

	Buffer.prototype.writeUInt16LE = function writeUInt16LE (value, offset, noAssert) {
	  value = +value
	  offset = offset | 0
	  if (!noAssert) checkInt(this, value, offset, 2, 0xffff, 0)
	  if (Buffer.TYPED_ARRAY_SUPPORT) {
	    this[offset] = (value & 0xff)
	    this[offset + 1] = (value >>> 8)
	  } else {
	    objectWriteUInt16(this, value, offset, true)
	  }
	  return offset + 2
	}

	Buffer.prototype.writeUInt16BE = function writeUInt16BE (value, offset, noAssert) {
	  value = +value
	  offset = offset | 0
	  if (!noAssert) checkInt(this, value, offset, 2, 0xffff, 0)
	  if (Buffer.TYPED_ARRAY_SUPPORT) {
	    this[offset] = (value >>> 8)
	    this[offset + 1] = (value & 0xff)
	  } else {
	    objectWriteUInt16(this, value, offset, false)
	  }
	  return offset + 2
	}

	function objectWriteUInt32 (buf, value, offset, littleEndian) {
	  if (value < 0) value = 0xffffffff + value + 1
	  for (var i = 0, j = Math.min(buf.length - offset, 4); i < j; i++) {
	    buf[offset + i] = (value >>> (littleEndian ? i : 3 - i) * 8) & 0xff
	  }
	}

	Buffer.prototype.writeUInt32LE = function writeUInt32LE (value, offset, noAssert) {
	  value = +value
	  offset = offset | 0
	  if (!noAssert) checkInt(this, value, offset, 4, 0xffffffff, 0)
	  if (Buffer.TYPED_ARRAY_SUPPORT) {
	    this[offset + 3] = (value >>> 24)
	    this[offset + 2] = (value >>> 16)
	    this[offset + 1] = (value >>> 8)
	    this[offset] = (value & 0xff)
	  } else {
	    objectWriteUInt32(this, value, offset, true)
	  }
	  return offset + 4
	}

	Buffer.prototype.writeUInt32BE = function writeUInt32BE (value, offset, noAssert) {
	  value = +value
	  offset = offset | 0
	  if (!noAssert) checkInt(this, value, offset, 4, 0xffffffff, 0)
	  if (Buffer.TYPED_ARRAY_SUPPORT) {
	    this[offset] = (value >>> 24)
	    this[offset + 1] = (value >>> 16)
	    this[offset + 2] = (value >>> 8)
	    this[offset + 3] = (value & 0xff)
	  } else {
	    objectWriteUInt32(this, value, offset, false)
	  }
	  return offset + 4
	}

	Buffer.prototype.writeIntLE = function writeIntLE (value, offset, byteLength, noAssert) {
	  value = +value
	  offset = offset | 0
	  if (!noAssert) {
	    var limit = Math.pow(2, 8 * byteLength - 1)

	    checkInt(this, value, offset, byteLength, limit - 1, -limit)
	  }

	  var i = 0
	  var mul = 1
	  var sub = 0
	  this[offset] = value & 0xFF
	  while (++i < byteLength && (mul *= 0x100)) {
	    if (value < 0 && sub === 0 && this[offset + i - 1] !== 0) {
	      sub = 1
	    }
	    this[offset + i] = ((value / mul) >> 0) - sub & 0xFF
	  }

	  return offset + byteLength
	}

	Buffer.prototype.writeIntBE = function writeIntBE (value, offset, byteLength, noAssert) {
	  value = +value
	  offset = offset | 0
	  if (!noAssert) {
	    var limit = Math.pow(2, 8 * byteLength - 1)

	    checkInt(this, value, offset, byteLength, limit - 1, -limit)
	  }

	  var i = byteLength - 1
	  var mul = 1
	  var sub = 0
	  this[offset + i] = value & 0xFF
	  while (--i >= 0 && (mul *= 0x100)) {
	    if (value < 0 && sub === 0 && this[offset + i + 1] !== 0) {
	      sub = 1
	    }
	    this[offset + i] = ((value / mul) >> 0) - sub & 0xFF
	  }

	  return offset + byteLength
	}

	Buffer.prototype.writeInt8 = function writeInt8 (value, offset, noAssert) {
	  value = +value
	  offset = offset | 0
	  if (!noAssert) checkInt(this, value, offset, 1, 0x7f, -0x80)
	  if (!Buffer.TYPED_ARRAY_SUPPORT) value = Math.floor(value)
	  if (value < 0) value = 0xff + value + 1
	  this[offset] = (value & 0xff)
	  return offset + 1
	}

	Buffer.prototype.writeInt16LE = function writeInt16LE (value, offset, noAssert) {
	  value = +value
	  offset = offset | 0
	  if (!noAssert) checkInt(this, value, offset, 2, 0x7fff, -0x8000)
	  if (Buffer.TYPED_ARRAY_SUPPORT) {
	    this[offset] = (value & 0xff)
	    this[offset + 1] = (value >>> 8)
	  } else {
	    objectWriteUInt16(this, value, offset, true)
	  }
	  return offset + 2
	}

	Buffer.prototype.writeInt16BE = function writeInt16BE (value, offset, noAssert) {
	  value = +value
	  offset = offset | 0
	  if (!noAssert) checkInt(this, value, offset, 2, 0x7fff, -0x8000)
	  if (Buffer.TYPED_ARRAY_SUPPORT) {
	    this[offset] = (value >>> 8)
	    this[offset + 1] = (value & 0xff)
	  } else {
	    objectWriteUInt16(this, value, offset, false)
	  }
	  return offset + 2
	}

	Buffer.prototype.writeInt32LE = function writeInt32LE (value, offset, noAssert) {
	  value = +value
	  offset = offset | 0
	  if (!noAssert) checkInt(this, value, offset, 4, 0x7fffffff, -0x80000000)
	  if (Buffer.TYPED_ARRAY_SUPPORT) {
	    this[offset] = (value & 0xff)
	    this[offset + 1] = (value >>> 8)
	    this[offset + 2] = (value >>> 16)
	    this[offset + 3] = (value >>> 24)
	  } else {
	    objectWriteUInt32(this, value, offset, true)
	  }
	  return offset + 4
	}

	Buffer.prototype.writeInt32BE = function writeInt32BE (value, offset, noAssert) {
	  value = +value
	  offset = offset | 0
	  if (!noAssert) checkInt(this, value, offset, 4, 0x7fffffff, -0x80000000)
	  if (value < 0) value = 0xffffffff + value + 1
	  if (Buffer.TYPED_ARRAY_SUPPORT) {
	    this[offset] = (value >>> 24)
	    this[offset + 1] = (value >>> 16)
	    this[offset + 2] = (value >>> 8)
	    this[offset + 3] = (value & 0xff)
	  } else {
	    objectWriteUInt32(this, value, offset, false)
	  }
	  return offset + 4
	}

	function checkIEEE754 (buf, value, offset, ext, max, min) {
	  if (offset + ext > buf.length) throw new RangeError('Index out of range')
	  if (offset < 0) throw new RangeError('Index out of range')
	}

	function writeFloat (buf, value, offset, littleEndian, noAssert) {
	  if (!noAssert) {
	    checkIEEE754(buf, value, offset, 4, 3.4028234663852886e+38, -3.4028234663852886e+38)
	  }
	  ieee754.write(buf, value, offset, littleEndian, 23, 4)
	  return offset + 4
	}

	Buffer.prototype.writeFloatLE = function writeFloatLE (value, offset, noAssert) {
	  return writeFloat(this, value, offset, true, noAssert)
	}

	Buffer.prototype.writeFloatBE = function writeFloatBE (value, offset, noAssert) {
	  return writeFloat(this, value, offset, false, noAssert)
	}

	function writeDouble (buf, value, offset, littleEndian, noAssert) {
	  if (!noAssert) {
	    checkIEEE754(buf, value, offset, 8, 1.7976931348623157E+308, -1.7976931348623157E+308)
	  }
	  ieee754.write(buf, value, offset, littleEndian, 52, 8)
	  return offset + 8
	}

	Buffer.prototype.writeDoubleLE = function writeDoubleLE (value, offset, noAssert) {
	  return writeDouble(this, value, offset, true, noAssert)
	}

	Buffer.prototype.writeDoubleBE = function writeDoubleBE (value, offset, noAssert) {
	  return writeDouble(this, value, offset, false, noAssert)
	}

	// copy(targetBuffer, targetStart=0, sourceStart=0, sourceEnd=buffer.length)
	Buffer.prototype.copy = function copy (target, targetStart, start, end) {
	  if (!start) start = 0
	  if (!end && end !== 0) end = this.length
	  if (targetStart >= target.length) targetStart = target.length
	  if (!targetStart) targetStart = 0
	  if (end > 0 && end < start) end = start

	  // Copy 0 bytes; we're done
	  if (end === start) return 0
	  if (target.length === 0 || this.length === 0) return 0

	  // Fatal error conditions
	  if (targetStart < 0) {
	    throw new RangeError('targetStart out of bounds')
	  }
	  if (start < 0 || start >= this.length) throw new RangeError('sourceStart out of bounds')
	  if (end < 0) throw new RangeError('sourceEnd out of bounds')

	  // Are we oob?
	  if (end > this.length) end = this.length
	  if (target.length - targetStart < end - start) {
	    end = target.length - targetStart + start
	  }

	  var len = end - start
	  var i

	  if (this === target && start < targetStart && targetStart < end) {
	    // descending copy from end
	    for (i = len - 1; i >= 0; i--) {
	      target[i + targetStart] = this[i + start]
	    }
	  } else if (len < 1000 || !Buffer.TYPED_ARRAY_SUPPORT) {
	    // ascending copy from start
	    for (i = 0; i < len; i++) {
	      target[i + targetStart] = this[i + start]
	    }
	  } else {
	    Uint8Array.prototype.set.call(
	      target,
	      this.subarray(start, start + len),
	      targetStart
	    )
	  }

	  return len
	}

	// Usage:
	//    buffer.fill(number[, offset[, end]])
	//    buffer.fill(buffer[, offset[, end]])
	//    buffer.fill(string[, offset[, end]][, encoding])
	Buffer.prototype.fill = function fill (val, start, end, encoding) {
	  // Handle string cases:
	  if (typeof val === 'string') {
	    if (typeof start === 'string') {
	      encoding = start
	      start = 0
	      end = this.length
	    } else if (typeof end === 'string') {
	      encoding = end
	      end = this.length
	    }
	    if (val.length === 1) {
	      var code = val.charCodeAt(0)
	      if (code < 256) {
	        val = code
	      }
	    }
	    if (encoding !== undefined && typeof encoding !== 'string') {
	      throw new TypeError('encoding must be a string')
	    }
	    if (typeof encoding === 'string' && !Buffer.isEncoding(encoding)) {
	      throw new TypeError('Unknown encoding: ' + encoding)
	    }
	  } else if (typeof val === 'number') {
	    val = val & 255
	  }

	  // Invalid ranges are not set to a default, so can range check early.
	  if (start < 0 || this.length < start || this.length < end) {
	    throw new RangeError('Out of range index')
	  }

	  if (end <= start) {
	    return this
	  }

	  start = start >>> 0
	  end = end === undefined ? this.length : end >>> 0

	  if (!val) val = 0

	  var i
	  if (typeof val === 'number') {
	    for (i = start; i < end; i++) {
	      this[i] = val
	    }
	  } else {
	    var bytes = Buffer.isBuffer(val)
	      ? val
	      : utf8ToBytes(new Buffer(val, encoding).toString())
	    var len = bytes.length
	    for (i = 0; i < end - start; i++) {
	      this[i + start] = bytes[i % len]
	    }
	  }

	  return this
	}

	// HELPER FUNCTIONS
	// ================

	var INVALID_BASE64_RE = /[^+\/0-9A-Za-z-_]/g

	function base64clean (str) {
	  // Node strips out invalid characters like \n and \t from the string, base64-js does not
	  str = stringtrim(str).replace(INVALID_BASE64_RE, '')
	  // Node converts strings with length < 2 to ''
	  if (str.length < 2) return ''
	  // Node allows for non-padded base64 strings (missing trailing ===), base64-js does not
	  while (str.length % 4 !== 0) {
	    str = str + '='
	  }
	  return str
	}

	function stringtrim (str) {
	  if (str.trim) return str.trim()
	  return str.replace(/^\s+|\s+$/g, '')
	}

	function toHex (n) {
	  if (n < 16) return '0' + n.toString(16)
	  return n.toString(16)
	}

	function utf8ToBytes (string, units) {
	  units = units || Infinity
	  var codePoint
	  var length = string.length
	  var leadSurrogate = null
	  var bytes = []

	  for (var i = 0; i < length; i++) {
	    codePoint = string.charCodeAt(i)

	    // is surrogate component
	    if (codePoint > 0xD7FF && codePoint < 0xE000) {
	      // last char was a lead
	      if (!leadSurrogate) {
	        // no lead yet
	        if (codePoint > 0xDBFF) {
	          // unexpected trail
	          if ((units -= 3) > -1) bytes.push(0xEF, 0xBF, 0xBD)
	          continue
	        } else if (i + 1 === length) {
	          // unpaired lead
	          if ((units -= 3) > -1) bytes.push(0xEF, 0xBF, 0xBD)
	          continue
	        }

	        // valid lead
	        leadSurrogate = codePoint

	        continue
	      }

	      // 2 leads in a row
	      if (codePoint < 0xDC00) {
	        if ((units -= 3) > -1) bytes.push(0xEF, 0xBF, 0xBD)
	        leadSurrogate = codePoint
	        continue
	      }

	      // valid surrogate pair
	      codePoint = (leadSurrogate - 0xD800 << 10 | codePoint - 0xDC00) + 0x10000
	    } else if (leadSurrogate) {
	      // valid bmp char, but last char was a lead
	      if ((units -= 3) > -1) bytes.push(0xEF, 0xBF, 0xBD)
	    }

	    leadSurrogate = null

	    // encode utf8
	    if (codePoint < 0x80) {
	      if ((units -= 1) < 0) break
	      bytes.push(codePoint)
	    } else if (codePoint < 0x800) {
	      if ((units -= 2) < 0) break
	      bytes.push(
	        codePoint >> 0x6 | 0xC0,
	        codePoint & 0x3F | 0x80
	      )
	    } else if (codePoint < 0x10000) {
	      if ((units -= 3) < 0) break
	      bytes.push(
	        codePoint >> 0xC | 0xE0,
	        codePoint >> 0x6 & 0x3F | 0x80,
	        codePoint & 0x3F | 0x80
	      )
	    } else if (codePoint < 0x110000) {
	      if ((units -= 4) < 0) break
	      bytes.push(
	        codePoint >> 0x12 | 0xF0,
	        codePoint >> 0xC & 0x3F | 0x80,
	        codePoint >> 0x6 & 0x3F | 0x80,
	        codePoint & 0x3F | 0x80
	      )
	    } else {
	      throw new Error('Invalid code point')
	    }
	  }

	  return bytes
	}

	function asciiToBytes (str) {
	  var byteArray = []
	  for (var i = 0; i < str.length; i++) {
	    // Node's code seems to be doing this and not & 0x7F..
	    byteArray.push(str.charCodeAt(i) & 0xFF)
	  }
	  return byteArray
	}

	function utf16leToBytes (str, units) {
	  var c, hi, lo
	  var byteArray = []
	  for (var i = 0; i < str.length; i++) {
	    if ((units -= 2) < 0) break

	    c = str.charCodeAt(i)
	    hi = c >> 8
	    lo = c % 256
	    byteArray.push(lo)
	    byteArray.push(hi)
	  }

	  return byteArray
	}

	function base64ToBytes (str) {
	  return base64.toByteArray(base64clean(str))
	}

	function blitBuffer (src, dst, offset, length) {
	  for (var i = 0; i < length; i++) {
	    if ((i + offset >= dst.length) || (i >= src.length)) break
	    dst[i + offset] = src[i]
	  }
	  return i
	}

	function isnan (val) {
	  return val !== val // eslint-disable-line no-self-compare
	}

	/* WEBPACK VAR INJECTION */}.call(exports, __webpack_require__(229).Buffer, (function() { return this; }())))

/***/ },
/* 230 */
/***/ function(module, exports) {

	'use strict'

	exports.toByteArray = toByteArray
	exports.fromByteArray = fromByteArray

	var lookup = []
	var revLookup = []
	var Arr = typeof Uint8Array !== 'undefined' ? Uint8Array : Array

	function init () {
	  var code = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/'
	  for (var i = 0, len = code.length; i < len; ++i) {
	    lookup[i] = code[i]
	    revLookup[code.charCodeAt(i)] = i
	  }

	  revLookup['-'.charCodeAt(0)] = 62
	  revLookup['_'.charCodeAt(0)] = 63
	}

	init()

	function toByteArray (b64) {
	  var i, j, l, tmp, placeHolders, arr
	  var len = b64.length

	  if (len % 4 > 0) {
	    throw new Error('Invalid string. Length must be a multiple of 4')
	  }

	  // the number of equal signs (place holders)
	  // if there are two placeholders, than the two characters before it
	  // represent one byte
	  // if there is only one, then the three characters before it represent 2 bytes
	  // this is just a cheap hack to not do indexOf twice
	  placeHolders = b64[len - 2] === '=' ? 2 : b64[len - 1] === '=' ? 1 : 0

	  // base64 is 4/3 + up to two characters of the original data
	  arr = new Arr(len * 3 / 4 - placeHolders)

	  // if there are placeholders, only get up to the last complete 4 chars
	  l = placeHolders > 0 ? len - 4 : len

	  var L = 0

	  for (i = 0, j = 0; i < l; i += 4, j += 3) {
	    tmp = (revLookup[b64.charCodeAt(i)] << 18) | (revLookup[b64.charCodeAt(i + 1)] << 12) | (revLookup[b64.charCodeAt(i + 2)] << 6) | revLookup[b64.charCodeAt(i + 3)]
	    arr[L++] = (tmp >> 16) & 0xFF
	    arr[L++] = (tmp >> 8) & 0xFF
	    arr[L++] = tmp & 0xFF
	  }

	  if (placeHolders === 2) {
	    tmp = (revLookup[b64.charCodeAt(i)] << 2) | (revLookup[b64.charCodeAt(i + 1)] >> 4)
	    arr[L++] = tmp & 0xFF
	  } else if (placeHolders === 1) {
	    tmp = (revLookup[b64.charCodeAt(i)] << 10) | (revLookup[b64.charCodeAt(i + 1)] << 4) | (revLookup[b64.charCodeAt(i + 2)] >> 2)
	    arr[L++] = (tmp >> 8) & 0xFF
	    arr[L++] = tmp & 0xFF
	  }

	  return arr
	}

	function tripletToBase64 (num) {
	  return lookup[num >> 18 & 0x3F] + lookup[num >> 12 & 0x3F] + lookup[num >> 6 & 0x3F] + lookup[num & 0x3F]
	}

	function encodeChunk (uint8, start, end) {
	  var tmp
	  var output = []
	  for (var i = start; i < end; i += 3) {
	    tmp = (uint8[i] << 16) + (uint8[i + 1] << 8) + (uint8[i + 2])
	    output.push(tripletToBase64(tmp))
	  }
	  return output.join('')
	}

	function fromByteArray (uint8) {
	  var tmp
	  var len = uint8.length
	  var extraBytes = len % 3 // if we have 1 byte left, pad 2 bytes
	  var output = ''
	  var parts = []
	  var maxChunkLength = 16383 // must be multiple of 3

	  // go through the array every three bytes, we'll deal with trailing stuff later
	  for (var i = 0, len2 = len - extraBytes; i < len2; i += maxChunkLength) {
	    parts.push(encodeChunk(uint8, i, (i + maxChunkLength) > len2 ? len2 : (i + maxChunkLength)))
	  }

	  // pad the end with zeros, but make sure to not forget the extra bytes
	  if (extraBytes === 1) {
	    tmp = uint8[len - 1]
	    output += lookup[tmp >> 2]
	    output += lookup[(tmp << 4) & 0x3F]
	    output += '=='
	  } else if (extraBytes === 2) {
	    tmp = (uint8[len - 2] << 8) + (uint8[len - 1])
	    output += lookup[tmp >> 10]
	    output += lookup[(tmp >> 4) & 0x3F]
	    output += lookup[(tmp << 2) & 0x3F]
	    output += '='
	  }

	  parts.push(output)

	  return parts.join('')
	}


/***/ },
/* 231 */
/***/ function(module, exports) {

	exports.read = function (buffer, offset, isLE, mLen, nBytes) {
	  var e, m
	  var eLen = nBytes * 8 - mLen - 1
	  var eMax = (1 << eLen) - 1
	  var eBias = eMax >> 1
	  var nBits = -7
	  var i = isLE ? (nBytes - 1) : 0
	  var d = isLE ? -1 : 1
	  var s = buffer[offset + i]

	  i += d

	  e = s & ((1 << (-nBits)) - 1)
	  s >>= (-nBits)
	  nBits += eLen
	  for (; nBits > 0; e = e * 256 + buffer[offset + i], i += d, nBits -= 8) {}

	  m = e & ((1 << (-nBits)) - 1)
	  e >>= (-nBits)
	  nBits += mLen
	  for (; nBits > 0; m = m * 256 + buffer[offset + i], i += d, nBits -= 8) {}

	  if (e === 0) {
	    e = 1 - eBias
	  } else if (e === eMax) {
	    return m ? NaN : ((s ? -1 : 1) * Infinity)
	  } else {
	    m = m + Math.pow(2, mLen)
	    e = e - eBias
	  }
	  return (s ? -1 : 1) * m * Math.pow(2, e - mLen)
	}

	exports.write = function (buffer, value, offset, isLE, mLen, nBytes) {
	  var e, m, c
	  var eLen = nBytes * 8 - mLen - 1
	  var eMax = (1 << eLen) - 1
	  var eBias = eMax >> 1
	  var rt = (mLen === 23 ? Math.pow(2, -24) - Math.pow(2, -77) : 0)
	  var i = isLE ? 0 : (nBytes - 1)
	  var d = isLE ? 1 : -1
	  var s = value < 0 || (value === 0 && 1 / value < 0) ? 1 : 0

	  value = Math.abs(value)

	  if (isNaN(value) || value === Infinity) {
	    m = isNaN(value) ? 1 : 0
	    e = eMax
	  } else {
	    e = Math.floor(Math.log(value) / Math.LN2)
	    if (value * (c = Math.pow(2, -e)) < 1) {
	      e--
	      c *= 2
	    }
	    if (e + eBias >= 1) {
	      value += rt / c
	    } else {
	      value += rt * Math.pow(2, 1 - eBias)
	    }
	    if (value * c >= 2) {
	      e++
	      c /= 2
	    }

	    if (e + eBias >= eMax) {
	      m = 0
	      e = eMax
	    } else if (e + eBias >= 1) {
	      m = (value * c - 1) * Math.pow(2, mLen)
	      e = e + eBias
	    } else {
	      m = value * Math.pow(2, eBias - 1) * Math.pow(2, mLen)
	      e = 0
	    }
	  }

	  for (; mLen >= 8; buffer[offset + i] = m & 0xff, i += d, m /= 256, mLen -= 8) {}

	  e = (e << mLen) | m
	  eLen += mLen
	  for (; eLen > 0; buffer[offset + i] = e & 0xff, i += d, e /= 256, eLen -= 8) {}

	  buffer[offset + i - d] |= s * 128
	}


/***/ },
/* 232 */
/***/ function(module, exports) {

	var toString = {}.toString;

	module.exports = Array.isArray || function (arr) {
	  return toString.call(arr) == '[object Array]';
	};


/***/ },
/* 233 */
/***/ function(module, exports, __webpack_require__) {

	'use strict';

	var _stringify = __webpack_require__(150);

	var _stringify2 = _interopRequireDefault(_stringify);

	var _assign = __webpack_require__(234);

	var _assign2 = _interopRequireDefault(_assign);

	var _classCallCheck2 = __webpack_require__(220);

	var _classCallCheck3 = _interopRequireDefault(_classCallCheck2);

	var _createClass2 = __webpack_require__(221);

	var _createClass3 = _interopRequireDefault(_createClass2);

	function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

	var Buffer = __webpack_require__(229).Buffer;

	var Node = function () {
	  function Node(payload, next) {
	    (0, _classCallCheck3.default)(this, Node);

	    this.payload = payload || null;
	    this.hash = null;
	    this.next = next ? next instanceof Array ? next : [next] : [];

	    // Convert instances of Node to its hash
	    this.next = this.next.map(function (f) {
	      if (f instanceof Node) return f.hash;
	      return f;
	    });
	  }

	  (0, _createClass3.default)(Node, [{
	    key: 'hasChild',
	    value: function hasChild(a) {
	      for (var i = 0; i < this.next.length; i++) {
	        if (this.next[i] === a.hash) return true;
	      }
	      return false;
	    }
	  }, {
	    key: 'asJson',
	    get: function get() {
	      var res = { payload: this.payload };
	      var next = this.next.map(function (f) {
	        if (f instanceof Node) return f.hash;
	        return f;
	      });
	      (0, _assign2.default)(res, { next: next });
	      return res;
	    }
	  }], [{
	    key: 'create',
	    value: function create(ipfs, data, next) {
	      if (!ipfs) throw new Error("Node requires ipfs instance");
	      var node = new Node(data, next);
	      return Node.getIpfsHash(ipfs, node).then(function (hash) {
	        node.hash = hash;
	        return node;
	      });
	    }
	  }, {
	    key: 'fromIpfsHash',
	    value: function fromIpfsHash(ipfs, hash) {
	      if (!ipfs) throw new Error("Node requires ipfs instance");
	      if (!hash) throw new Error("Invalid hash: " + hash);
	      return ipfs.object.get(hash).then(function (obj) {
	        var f = JSON.parse(obj.Data);
	        return Node.create(ipfs, f.payload, f.next);
	      });
	    }
	  }, {
	    key: 'getIpfsHash',
	    value: function getIpfsHash(ipfs, node) {
	      if (!ipfs) throw new Error("Node requires ipfs instance");
	      return ipfs.object.put(new Buffer((0, _stringify2.default)({ Data: (0, _stringify2.default)(node.asJson) }))).then(function (res) {
	        return res.Hash;
	      });
	    }
	  }, {
	    key: 'equals',
	    value: function equals(a, b) {
	      return a.hash === b.hash;
	    }
	  }]);
	  return Node;
	}();

	module.exports = Node;

/***/ },
/* 234 */
/***/ function(module, exports, __webpack_require__) {

	module.exports = { "default": __webpack_require__(235), __esModule: true };

/***/ },
/* 235 */
/***/ function(module, exports, __webpack_require__) {

	__webpack_require__(236);
	module.exports = __webpack_require__(152).Object.assign;

/***/ },
/* 236 */
/***/ function(module, exports, __webpack_require__) {

	// 19.1.3.1 Object.assign(target, source)
	var $export = __webpack_require__(162);

	$export($export.S + $export.F, 'Object', {assign: __webpack_require__(237)});

/***/ },
/* 237 */
/***/ function(module, exports, __webpack_require__) {

	'use strict';
	// 19.1.2.1 Object.assign(target, source, ...)
	var getKeys  = __webpack_require__(182)
	  , gOPS     = __webpack_require__(238)
	  , pIE      = __webpack_require__(212)
	  , toObject = __webpack_require__(198)
	  , IObject  = __webpack_require__(185)
	  , $assign  = Object.assign;

	// should work with symbols and should have deterministic property order (V8 bug)
	module.exports = !$assign || __webpack_require__(172)(function(){
	  var A = {}
	    , B = {}
	    , S = Symbol()
	    , K = 'abcdefghijklmnopqrst';
	  A[S] = 7;
	  K.split('').forEach(function(k){ B[k] = k; });
	  return $assign({}, A)[S] != 7 || Object.keys($assign({}, B)).join('') != K;
	}) ? function assign(target, source){ // eslint-disable-line no-unused-vars
	  var T     = toObject(target)
	    , aLen  = arguments.length
	    , index = 1
	    , getSymbols = gOPS.f
	    , isEnum     = pIE.f;
	  while(aLen > index){
	    var S      = IObject(arguments[index++])
	      , keys   = getSymbols ? getKeys(S).concat(getSymbols(S)) : getKeys(S)
	      , length = keys.length
	      , j      = 0
	      , key;
	    while(length > j)if(isEnum.call(S, key = keys[j++]))T[key] = S[key];
	  } return T;
	} : $assign;

/***/ },
/* 238 */
/***/ function(module, exports) {

	exports.f = Object.getOwnPropertySymbols;

/***/ },
/* 239 */
/***/ function(module, exports, __webpack_require__) {

	'use strict';

	var _stringify = __webpack_require__(66);

	var _stringify2 = _interopRequireDefault(_stringify);

	var _promise = __webpack_require__(1);

	var _promise2 = _interopRequireDefault(_promise);

	var _classCallCheck2 = __webpack_require__(56);

	var _classCallCheck3 = _interopRequireDefault(_classCallCheck2);

	var _createClass2 = __webpack_require__(57);

	var _createClass3 = _interopRequireDefault(_createClass2);

	function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

	var fs = __webpack_require__(64);
	var path = __webpack_require__(63);
	var logger = __webpack_require__(61).create("orbit-db.Cache");

	// const defaultFilepath = path.resolve('./orbit-db-cache.json');
	// let filePath = defaultFilepath;
	var filePath = void 0;
	var cache = {};

	var Cache = function () {
	  function Cache() {
	    (0, _classCallCheck3.default)(this, Cache);
	  }

	  (0, _createClass3.default)(Cache, null, [{
	    key: 'set',
	    value: function set(key, value) {
	      return new _promise2.default(function (resolve, reject) {
	        cache[key] = value;
	        if (filePath) {
	          // fs.writeFileSync(filePath, JSON.stringify(cache, null, 2) + "\n");
	          fs.writeFile(filePath, (0, _stringify2.default)(cache, null, 2) + "\n", resolve);
	        } else {
	          resolve();
	        }
	      });
	    }
	  }, {
	    key: 'get',
	    value: function get(key) {
	      return cache[key];
	    }
	  }, {
	    key: 'loadCache',
	    value: function loadCache(cacheFile) {
	      return new _promise2.default(function (resolve, reject) {
	        // filePath = cacheFile ? cacheFile : defaultFilepath;
	        if (cacheFile) {
	          fs.exists(cacheFile, function (err, res) {
	            if (res) {
	              filePath = cacheFile;
	              logger.debug('Load cache from ' + cacheFile);
	              cache = JSON.parse(fs.readFileSync(cacheFile));
	            } else {
	              resolve();
	            }
	          });
	        } else {
	          resolve();
	        }
	      });
	    }
	  }]);
	  return Cache;
	}();

	module.exports = Cache;

/***/ },
/* 240 */
/***/ function(module, exports, __webpack_require__) {

	'use strict';

	var _classCallCheck2 = __webpack_require__(56);

	var _classCallCheck3 = _interopRequireDefault(_classCallCheck2);

	var _createClass2 = __webpack_require__(57);

	var _createClass3 = _interopRequireDefault(_createClass2);

	function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

	var DefaultIndex = function () {
	  function DefaultIndex() {
	    (0, _classCallCheck3.default)(this, DefaultIndex);

	    this._index = [];
	  }

	  (0, _createClass3.default)(DefaultIndex, [{
	    key: 'get',
	    value: function get() {
	      return this._index;
	    }
	  }, {
	    key: 'updateIndex',
	    value: function updateIndex(oplog) {
	      this._index = oplog.ops;
	    }
	  }]);
	  return DefaultIndex;
	}();

	module.exports = DefaultIndex;

/***/ },
/* 241 */
/***/ function(module, exports, __webpack_require__) {

	'use strict';

	var _classCallCheck2 = __webpack_require__(56);

	var _classCallCheck3 = _interopRequireDefault(_classCallCheck2);

	var _createClass2 = __webpack_require__(57);

	var _createClass3 = _interopRequireDefault(_createClass2);

	function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

	var Counter = __webpack_require__(242);

	var CounterIndex = function () {
	  function CounterIndex() {
	    (0, _classCallCheck3.default)(this, CounterIndex);

	    this._counter = null;
	  }

	  (0, _createClass3.default)(CounterIndex, [{
	    key: 'createCounter',
	    value: function createCounter(id) {
	      this._counter = new Counter(id);
	    }
	  }, {
	    key: 'get',
	    value: function get() {
	      return this._counter;
	    }
	  }, {
	    key: 'updateIndex',
	    value: function updateIndex(oplog, updated) {
	      var _this = this;

	      if (this._counter) {
	        updated.filter(function (f) {
	          return f && f.op === 'COUNTER';
	        }).map(function (f) {
	          return Counter.from(f.value);
	        }).forEach(function (f) {
	          return _this._counter.merge(f);
	        });
	      }
	    }
	  }]);
	  return CounterIndex;
	}();

	module.exports = CounterIndex;

/***/ },
/* 242 */
/***/ function(module, exports, __webpack_require__) {

	'use strict';

	var _keys = __webpack_require__(243);

	var _keys2 = _interopRequireDefault(_keys);

	var _classCallCheck2 = __webpack_require__(56);

	var _classCallCheck3 = _interopRequireDefault(_classCallCheck2);

	var _createClass2 = __webpack_require__(57);

	var _createClass3 = _interopRequireDefault(_createClass2);

	function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

	var isEqual = __webpack_require__(246).isEqual;

	var GCounter = function () {
	  function GCounter(id, payload) {
	    (0, _classCallCheck3.default)(this, GCounter);

	    this.id = id;
	    this._counters = payload ? payload : {};
	    this._counters[this.id] = this._counters[this.id] ? this._counters[this.id] : 0;
	  }

	  (0, _createClass3.default)(GCounter, [{
	    key: 'increment',
	    value: function increment(amount) {
	      if (!amount) amount = 1;
	      this._counters[this.id] = this._counters[this.id] + amount;
	    }
	  }, {
	    key: 'compare',
	    value: function compare(other) {
	      if (other.id !== this.id) return false;

	      return isEqual(other._counters, this._counters);
	    }
	  }, {
	    key: 'merge',
	    value: function merge(other) {
	      var _this = this;

	      (0, _keys2.default)(other._counters).forEach(function (f) {
	        _this._counters[f] = Math.max(_this._counters[f] ? _this._counters[f] : 0, other._counters[f]);
	      });
	    }
	  }, {
	    key: 'value',
	    get: function get() {
	      var _this2 = this;

	      return (0, _keys2.default)(this._counters).map(function (f) {
	        return _this2._counters[f];
	      }).reduce(function (previousValue, currentValue) {
	        return previousValue + currentValue;
	      }, 0);
	    }
	  }, {
	    key: 'payload',
	    get: function get() {
	      return { id: this.id, counters: this._counters };
	    }
	  }], [{
	    key: 'from',
	    value: function from(payload) {
	      return new GCounter(payload.id, payload.counters);
	    }
	  }]);
	  return GCounter;
	}();

	module.exports = GCounter;

/***/ },
/* 243 */
/***/ function(module, exports, __webpack_require__) {

	module.exports = { "default": __webpack_require__(244), __esModule: true };

/***/ },
/* 244 */
/***/ function(module, exports, __webpack_require__) {

	__webpack_require__(245);
	module.exports = __webpack_require__(12).Object.keys;

/***/ },
/* 245 */
/***/ function(module, exports, __webpack_require__) {

	// 19.1.2.14 Object.keys(O)
	var toObject = __webpack_require__(122);

	__webpack_require__(123)('keys', function($keys){
	  return function keys(it){
	    return $keys(toObject(it));
	  };
	});

/***/ },
/* 246 */
/***/ function(module, exports, __webpack_require__) {

	'use strict';

	var _getOwnPropertyNames = __webpack_require__(247);

	var _getOwnPropertyNames2 = _interopRequireDefault(_getOwnPropertyNames);

	function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

	exports.isEqual = function (a, b) {
	  var propsA = (0, _getOwnPropertyNames2.default)(a);
	  var propsB = (0, _getOwnPropertyNames2.default)(b);

	  if (propsA.length !== propsB.length) return false;

	  for (var i = 0; i < propsA.length; i++) {
	    var prop = propsA[i];
	    if (a[prop] !== b[prop]) return false;
	  }

	  return true;
	};

/***/ },
/* 247 */
/***/ function(module, exports, __webpack_require__) {

	module.exports = { "default": __webpack_require__(248), __esModule: true };

/***/ },
/* 248 */
/***/ function(module, exports, __webpack_require__) {

	var $ = __webpack_require__(17);
	__webpack_require__(249);
	module.exports = function getOwnPropertyNames(it){
	  return $.getNames(it);
	};

/***/ },
/* 249 */
/***/ function(module, exports, __webpack_require__) {

	// 19.1.2.7 Object.getOwnPropertyNames(O)
	__webpack_require__(123)('getOwnPropertyNames', function(){
	  return __webpack_require__(130).get;
	});

/***/ },
/* 250 */
/***/ function(module, exports, __webpack_require__) {

	'use strict';

	var _getPrototypeOf = __webpack_require__(119);

	var _getPrototypeOf2 = _interopRequireDefault(_getPrototypeOf);

	var _classCallCheck2 = __webpack_require__(56);

	var _classCallCheck3 = _interopRequireDefault(_classCallCheck2);

	var _createClass2 = __webpack_require__(57);

	var _createClass3 = _interopRequireDefault(_createClass2);

	var _possibleConstructorReturn2 = __webpack_require__(124);

	var _possibleConstructorReturn3 = _interopRequireDefault(_possibleConstructorReturn2);

	var _get2 = __webpack_require__(133);

	var _get3 = _interopRequireDefault(_get2);

	var _inherits2 = __webpack_require__(137);

	var _inherits3 = _interopRequireDefault(_inherits2);

	function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

	var Store = __webpack_require__(143);
	var KVIndex = __webpack_require__(251);

	var KeyValueStore = function (_Store) {
	  (0, _inherits3.default)(KeyValueStore, _Store);

	  function KeyValueStore(ipfs, dbname, options) {
	    (0, _classCallCheck3.default)(this, KeyValueStore);

	    var _this = (0, _possibleConstructorReturn3.default)(this, (0, _getPrototypeOf2.default)(KeyValueStore).call(this, ipfs, dbname, options));

	    _this._index = new KVIndex();
	    return _this;
	  }

	  (0, _createClass3.default)(KeyValueStore, [{
	    key: 'delete',
	    value: function _delete() {
	      (0, _get3.default)((0, _getPrototypeOf2.default)(KeyValueStore.prototype), 'delete', this).call(this);
	      this._index = new KVIndex();
	    }
	  }, {
	    key: 'get',
	    value: function get(key) {
	      return this._index.get(key);
	    }
	  }, {
	    key: 'set',
	    value: function set(key, data) {
	      this.put(key, data);
	    }
	  }, {
	    key: 'put',
	    value: function put(key, data) {
	      return this._addOperation('PUT', key, data);
	    }
	  }, {
	    key: 'del',
	    value: function del(key) {
	      return this._addOperation('DELETE', key);
	    }
	  }]);
	  return KeyValueStore;
	}(Store);

	module.exports = KeyValueStore;

/***/ },
/* 251 */
/***/ function(module, exports, __webpack_require__) {

	'use strict';

	var _classCallCheck2 = __webpack_require__(56);

	var _classCallCheck3 = _interopRequireDefault(_classCallCheck2);

	var _createClass2 = __webpack_require__(57);

	var _createClass3 = _interopRequireDefault(_createClass2);

	function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

	var KeyValueIndex = function () {
	  function KeyValueIndex() {
	    (0, _classCallCheck3.default)(this, KeyValueIndex);

	    this._index = {};
	  }

	  (0, _createClass3.default)(KeyValueIndex, [{
	    key: 'get',
	    value: function get(key) {
	      return this._index[key];
	    }
	  }, {
	    key: 'updateIndex',
	    value: function updateIndex(oplog, updated) {
	      var _this = this;

	      var handled = [];

	      updated.reverse().forEach(function (item) {
	        if (handled.indexOf(item.key) === -1) {
	          handled.push(item.key);
	          if (item.op === 'PUT') {
	            _this._index[item.key] = item.value;
	          } else if (item.op === 'DELETE') {
	            delete _this._index[item.key];
	          }
	        }
	      });
	    }
	  }]);
	  return KeyValueIndex;
	}();

	module.exports = KeyValueIndex;

/***/ },
/* 252 */
/***/ function(module, exports, __webpack_require__) {

	'use strict';

	var _defineProperty2 = __webpack_require__(253);

	var _defineProperty3 = _interopRequireDefault(_defineProperty2);

	var _iterator2 = __webpack_require__(254);

	var _iterator3 = _interopRequireDefault(_iterator2);

	var _getPrototypeOf = __webpack_require__(119);

	var _getPrototypeOf2 = _interopRequireDefault(_getPrototypeOf);

	var _classCallCheck2 = __webpack_require__(56);

	var _classCallCheck3 = _interopRequireDefault(_classCallCheck2);

	var _createClass2 = __webpack_require__(57);

	var _createClass3 = _interopRequireDefault(_createClass2);

	var _possibleConstructorReturn2 = __webpack_require__(124);

	var _possibleConstructorReturn3 = _interopRequireDefault(_possibleConstructorReturn2);

	var _get2 = __webpack_require__(133);

	var _get3 = _interopRequireDefault(_get2);

	var _inherits2 = __webpack_require__(137);

	var _inherits3 = _interopRequireDefault(_inherits2);

	function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

	var Lazy = __webpack_require__(256);
	var Store = __webpack_require__(143);
	var EventLogIndex = __webpack_require__(257);

	var EventStore = function (_Store) {
	  (0, _inherits3.default)(EventStore, _Store);

	  function EventStore(ipfs, dbname, options) {
	    (0, _classCallCheck3.default)(this, EventStore);

	    var _this = (0, _possibleConstructorReturn3.default)(this, (0, _getPrototypeOf2.default)(EventStore).call(this, ipfs, dbname, options));

	    _this._index = new EventLogIndex();
	    return _this;
	  }

	  (0, _createClass3.default)(EventStore, [{
	    key: 'delete',
	    value: function _delete(dbname) {
	      (0, _get3.default)((0, _getPrototypeOf2.default)(EventStore.prototype), 'delete', this).call(this);
	      this._index = new EventLogIndex();
	    }
	  }, {
	    key: 'add',
	    value: function add(data) {
	      return this._addOperation('ADD', null, data);
	    }
	  }, {
	    key: 'remove',
	    value: function remove(hash) {
	      return this._addOperation('DELETE', hash);
	    }
	  }, {
	    key: 'iterator',
	    value: function iterator(options) {
	      var _iterator;

	      var messages = this._query(this.dbname, options);
	      var currentIndex = 0;
	      var iterator = (_iterator = {}, (0, _defineProperty3.default)(_iterator, _iterator3.default, function () {
	        return this;
	      }), (0, _defineProperty3.default)(_iterator, 'next', function next() {
	        var item = { value: null, done: true };
	        if (currentIndex < messages.length) {
	          item = { value: messages[currentIndex], done: false };
	          currentIndex++;
	        }
	        return item;
	      }), (0, _defineProperty3.default)(_iterator, 'collect', function collect() {
	        return messages;
	      }), _iterator);

	      return iterator;
	    }
	  }, {
	    key: '_query',
	    value: function _query(dbname, opts) {
	      if (!opts) opts = {};

	      var amount = opts.limit ? opts.limit > -1 ? opts.limit : this._index.get().length : 1; // Return 1 if no limit is provided
	      var result = [];

	      if (opts.gt || opts.gte) {
	        // Greater than case
	        result = this._read(this._index.get(), opts.gt ? opts.gt : opts.gte, amount, opts.gte ? true : false);
	      } else {
	        // Lower than and lastN case, search latest first by reversing the sequence
	        result = this._read(this._index.get().reverse(), opts.lt ? opts.lt : opts.lte, amount, opts.lte || !opts.lt).reverse();
	      }

	      if (opts.reverse) result.reverse();

	      return result.toArray();
	    }
	  }, {
	    key: '_read',
	    value: function _read(ops, key, amount, inclusive) {
	      return Lazy(ops).skipWhile(function (f) {
	        return key && f.key !== key;
	      }).drop(inclusive ? 0 : 1).take(amount);
	    }
	  }]);
	  return EventStore;
	}(Store);

	module.exports = EventStore;

/***/ },
/* 253 */
/***/ function(module, exports, __webpack_require__) {

	"use strict";

	exports.__esModule = true;

	var _defineProperty = __webpack_require__(58);

	var _defineProperty2 = _interopRequireDefault(_defineProperty);

	function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

	exports.default = function (obj, key, value) {
	  if (key in obj) {
	    (0, _defineProperty2.default)(obj, key, {
	      value: value,
	      enumerable: true,
	      configurable: true,
	      writable: true
	    });
	  } else {
	    obj[key] = value;
	  }

	  return obj;
	};

/***/ },
/* 254 */
/***/ function(module, exports, __webpack_require__) {

	module.exports = { "default": __webpack_require__(255), __esModule: true };

/***/ },
/* 255 */
/***/ function(module, exports, __webpack_require__) {

	__webpack_require__(4);
	__webpack_require__(28);
	module.exports = __webpack_require__(25)('iterator');

/***/ },
/* 256 */
/***/ function(module, exports, __webpack_require__) {

	var __WEBPACK_AMD_DEFINE_FACTORY__, __WEBPACK_AMD_DEFINE_RESULT__;/* WEBPACK VAR INJECTION */(function(setImmediate, clearImmediate) {/*
	 * @name Lazy.js
	 *
	 * @fileOverview
	 * Lazy.js is a lazy evaluation library for JavaScript.
	 *
	 * This has been done before. For examples see:
	 *
	 * - [wu.js](http://fitzgen.github.io/wu.js/)
	 * - [Linq.js](http://linqjs.codeplex.com/)
	 * - [from.js](https://github.com/suckgamoni/fromjs/)
	 * - [IxJS](http://rx.codeplex.com/)
	 * - [sloth.js](http://rfw.name/sloth.js/)
	 *
	 * However, at least at present, Lazy.js is faster (on average) than any of
	 * those libraries. It is also more complete, with nearly all of the
	 * functionality of [Underscore](http://underscorejs.org/) and
	 * [Lo-Dash](http://lodash.com/).
	 *
	 * Finding your way around the code
	 * --------------------------------
	 *
	 * At the heart of Lazy.js is the {@link Sequence} object. You create an initial
	 * sequence using {@link Lazy}, which can accept an array, object, or string.
	 * You can then "chain" together methods from this sequence, creating a new
	 * sequence with each call.
	 *
	 * Here's an example:
	 *
	 *     var data = getReallyBigArray();
	 *
	 *     var statistics = Lazy(data)
	 *       .map(transform)
	 *       .filter(validate)
	 *       .reduce(aggregate);
	 *
	 * {@link Sequence} is the foundation of other, more specific sequence types.
	 *
	 * An {@link ArrayLikeSequence} provides indexed access to its elements.
	 *
	 * An {@link ObjectLikeSequence} consists of key/value pairs.
	 *
	 * A {@link StringLikeSequence} is like a string (duh): actually, it is an
	 * {@link ArrayLikeSequence} whose elements happen to be characters.
	 *
	 * An {@link AsyncSequence} is special: it iterates over its elements
	 * asynchronously (so calling `each` generally begins an asynchronous loop and
	 * returns immediately).
	 *
	 * For more information
	 * --------------------
	 *
	 * I wrote a blog post that explains a little bit more about Lazy.js, which you
	 * can read [here](http://philosopherdeveloper.com/posts/introducing-lazy-js.html).
	 *
	 * You can also [create an issue on GitHub](https://github.com/dtao/lazy.js/issues)
	 * if you have any issues with the library. I work through them eventually.
	 *
	 * [@dtao](https://github.com/dtao)
	 */

	(function(root, factory) {
	  if (true) {
	    !(__WEBPACK_AMD_DEFINE_FACTORY__ = (factory), __WEBPACK_AMD_DEFINE_RESULT__ = (typeof __WEBPACK_AMD_DEFINE_FACTORY__ === 'function' ? (__WEBPACK_AMD_DEFINE_FACTORY__.call(exports, __webpack_require__, exports, module)) : __WEBPACK_AMD_DEFINE_FACTORY__), __WEBPACK_AMD_DEFINE_RESULT__ !== undefined && (module.exports = __WEBPACK_AMD_DEFINE_RESULT__));
	  } else if (typeof exports === 'object') {
	    module.exports = factory();
	  } else {
	    root.Lazy = factory();
	  }
	})(this, function(context) {
	  /**
	   * Wraps an object and returns a {@link Sequence}. For `null` or `undefined`,
	   * simply returns an empty sequence (see {@link Lazy.strict} for a stricter
	   * implementation).
	   *
	   * - For **arrays**, Lazy will create a sequence comprising the elements in
	   *   the array (an {@link ArrayLikeSequence}).
	   * - For **objects**, Lazy will create a sequence of key/value pairs
	   *   (an {@link ObjectLikeSequence}).
	   * - For **strings**, Lazy will create a sequence of characters (a
	   *   {@link StringLikeSequence}).
	   *
	   * @public
	   * @param {Array|Object|string} source An array, object, or string to wrap.
	   * @returns {Sequence} The wrapped lazy object.
	   *
	   * @exampleHelpers
	   * // Utility functions to provide to all examples
	   * function increment(x) { return x + 1; }
	   * function isEven(x) { return x % 2 === 0; }
	   * function isPositive(x) { return x > 0; }
	   * function isNegative(x) { return x < 0; }
	   *
	   * @examples
	   * Lazy([1, 2, 4])       // instanceof Lazy.ArrayLikeSequence
	   * Lazy({ foo: "bar" })  // instanceof Lazy.ObjectLikeSequence
	   * Lazy("hello, world!") // instanceof Lazy.StringLikeSequence
	   * Lazy()                // sequence: []
	   * Lazy(null)            // sequence: []
	   */
	  function Lazy(source) {
	    if (source instanceof Array) {
	      return new ArrayWrapper(source);

	    } else if (typeof source === "string") {
	      return new StringWrapper(source);

	    } else if (source instanceof Sequence) {
	      return source;
	    }

	    if (Lazy.extensions) {
	      var extensions = Lazy.extensions, length = extensions.length, result;
	      while (!result && length--) {
	        result = extensions[length](source);
	      }
	      if (result) {
	        return result;
	      }
	    }

	    return new ObjectWrapper(source);
	  }

	  Lazy.VERSION = '0.4.2';

	  /*** Utility methods of questionable value ***/

	  Lazy.noop = function noop() {};
	  Lazy.identity = function identity(x) { return x; };

	  /**
	   * Provides a stricter version of {@link Lazy} which throws an error when
	   * attempting to wrap `null`, `undefined`, or numeric or boolean values as a
	   * sequence.
	   *
	   * @public
	   * @returns {Function} A stricter version of the {@link Lazy} helper function.
	   *
	   * @examples
	   * var Strict = Lazy.strict();
	   *
	   * Strict()                  // throws
	   * Strict(null)              // throws
	   * Strict(true)              // throws
	   * Strict(5)                 // throws
	   * Strict([1, 2, 3])         // instanceof Lazy.ArrayLikeSequence
	   * Strict({ foo: "bar" })    // instanceof Lazy.ObjectLikeSequence
	   * Strict("hello, world!")   // instanceof Lazy.StringLikeSequence
	   *
	   * // Let's also ensure the static functions are still there.
	   * Strict.range(3)           // sequence: [0, 1, 2]
	   * Strict.generate(Date.now) // instanceof Lazy.GeneratedSequence
	   */
	  Lazy.strict = function strict() {
	    function StrictLazy(source) {
	      if (source == null) {
	        throw new Error("You cannot wrap null or undefined using Lazy.");
	      }

	      if (typeof source === "number" || typeof source === "boolean") {
	        throw new Error("You cannot wrap primitive values using Lazy.");
	      }

	      return Lazy(source);
	    };

	    Lazy(Lazy).each(function(property, name) {
	      StrictLazy[name] = property;
	    });

	    return StrictLazy;
	  };

	  /**
	   * The `Sequence` object provides a unified API encapsulating the notion of
	   * zero or more consecutive elements in a collection, stream, etc.
	   *
	   * Lazy evaluation
	   * ---------------
	   *
	   * Generally speaking, creating a sequence should not be an expensive operation,
	   * and should not iterate over an underlying source or trigger any side effects.
	   * This means that chaining together methods that return sequences incurs only
	   * the cost of creating the `Sequence` objects themselves and not the cost of
	   * iterating an underlying data source multiple times.
	   *
	   * The following code, for example, creates 4 sequences and does nothing with
	   * `source`:
	   *
	   *     var seq = Lazy(source) // 1st sequence
	   *       .map(func)           // 2nd
	   *       .filter(pred)        // 3rd
	   *       .reverse();          // 4th
	   *
	   * Lazy's convention is to hold off on iterating or otherwise *doing* anything
	   * (aside from creating `Sequence` objects) until you call `each`:
	   *
	   *     seq.each(function(x) { console.log(x); });
	   *
	   * Defining custom sequences
	   * -------------------------
	   *
	   * Defining your own type of sequence is relatively simple:
	   *
	   * 1. Pass a *method name* and an object containing *function overrides* to
	   *    {@link Sequence.define}. If the object includes a function called `init`,
	   *    this function will be called upon initialization.
	   * 2. The object should include at least either a `getIterator` method or an
	   *    `each` method. The former supports both asynchronous and synchronous
	   *    iteration, but is slightly more cumbersome to implement. The latter
	   *    supports synchronous iteration and can be automatically implemented in
	   *    terms of the former. You can also implement both if you want, e.g. to
	   *    optimize performance. For more info, see {@link Iterator} and
	   *    {@link AsyncSequence}.
	   *
	   * As a trivial example, the following code defines a new method, `sample`,
	   * which randomly may or may not include each element from its parent.
	   *
	   *     Lazy.Sequence.define("sample", {
	   *       each: function(fn) {
	   *         return this.parent.each(function(e) {
	   *           // 50/50 chance of including this element.
	   *           if (Math.random() > 0.5) {
	   *             return fn(e);
	   *           }
	   *         });
	   *       }
	   *     });
	   *
	   * (Of course, the above could also easily have been implemented using
	   * {@link #filter} instead of creating a custom sequence. But I *did* say this
	   * was a trivial example, to be fair.)
	   *
	   * Now it will be possible to create this type of sequence from any parent
	   * sequence by calling the method name you specified. In other words, you can
	   * now do this:
	   *
	   *     Lazy(arr).sample();
	   *     Lazy(arr).map(func).sample();
	   *     Lazy(arr).map(func).filter(pred).sample();
	   *
	   * Etc., etc.
	   *
	   * @public
	   * @constructor
	   */
	  function Sequence() {}

	  /**
	   * Create a new constructor function for a type inheriting from `Sequence`.
	   *
	   * @public
	   * @param {string|Array.<string>} methodName The name(s) of the method(s) to be
	   *     used for constructing the new sequence. The method will be attached to
	   *     the `Sequence` prototype so that it can be chained with any other
	   *     sequence methods, like {@link #map}, {@link #filter}, etc.
	   * @param {Object} overrides An object containing function overrides for this
	   *     new sequence type. **Must** include either `getIterator` or `each` (or
	   *     both). *May* include an `init` method as well. For these overrides,
	   *     `this` will be the new sequence, and `this.parent` will be the base
	   *     sequence from which the new sequence was constructed.
	   * @returns {Function} A constructor for a new type inheriting from `Sequence`.
	   *
	   * @examples
	   * // This sequence type logs every element to the specified logger as it
	   * // iterates over it.
	   * Lazy.Sequence.define("verbose", {
	   *   init: function(logger) {
	   *     this.logger = logger;
	   *   },
	   *
	   *   each: function(fn) {
	   *     var logger = this.logger;
	   *     return this.parent.each(function(e, i) {
	   *       logger(e);
	   *       return fn(e, i);
	   *     });
	   *   }
	   * });
	   *
	   * Lazy([1, 2, 3]).verbose(logger).each(Lazy.noop) // calls logger 3 times
	   */
	  Sequence.define = function define(methodName, overrides) {
	    if (!overrides || (!overrides.getIterator && !overrides.each)) {
	      throw new Error("A custom sequence must implement *at least* getIterator or each!");
	    }

	    return defineSequenceType(Sequence, methodName, overrides);
	  };

	  /**
	   * Gets the number of elements in the sequence. In some cases, this may
	   * require eagerly evaluating the sequence.
	   *
	   * @public
	   * @returns {number} The number of elements in the sequence.
	   *
	   * @examples
	   * Lazy([1, 2, 3]).size();                 // => 3
	   * Lazy([1, 2]).map(Lazy.identity).size(); // => 2
	   * Lazy([1, 2, 3]).reject(isEven).size();  // => 2
	   * Lazy([1, 2, 3]).take(1).size();         // => 1
	   * Lazy({ foo: 1, bar: 2 }).size();        // => 2
	   * Lazy('hello').size();                   // => 5
	   */
	  Sequence.prototype.size = function size() {
	    return this.getIndex().length();
	  };

	  /**
	   * Creates an {@link Iterator} object with two methods, `moveNext` -- returning
	   * true or false -- and `current` -- returning the current value.
	   *
	   * This method is used when asynchronously iterating over sequences. Any type
	   * inheriting from `Sequence` must implement this method or it can't support
	   * asynchronous iteration.
	   *
	   * Note that **this method is not intended to be used directly by application
	   * code.** Rather, it is intended as a means for implementors to potentially
	   * define custom sequence types that support either synchronous or
	   * asynchronous iteration.
	   *
	   * @public
	   * @returns {Iterator} An iterator object.
	   *
	   * @examples
	   * var iterator = Lazy([1, 2]).getIterator();
	   *
	   * iterator.moveNext(); // => true
	   * iterator.current();  // => 1
	   * iterator.moveNext(); // => true
	   * iterator.current();  // => 2
	   * iterator.moveNext(); // => false
	   */
	  Sequence.prototype.getIterator = function getIterator() {
	    return new Iterator(this);
	  };

	  /**
	   * Gets the root sequence underlying the current chain of sequences.
	   */
	  Sequence.prototype.root = function root() {
	    return this.parent.root();
	  };

	  /**
	   * Whether or not the current sequence is an asynchronous one. This is more
	   * accurate than checking `instanceof {@link AsyncSequence}` because, for
	   * example, `Lazy([1, 2, 3]).async().map(Lazy.identity)` returns a sequence
	   * that iterates asynchronously even though it's not an instance of
	   * `AsyncSequence`.
	   *
	   * @returns {boolean} Whether or not the current sequence is an asynchronous one.
	   */
	  Sequence.prototype.isAsync = function isAsync() {
	    return this.parent ? this.parent.isAsync() : false;
	  };

	  /**
	   * Evaluates the sequence and produces the appropriate value (an array in most
	   * cases, an object for {@link ObjectLikeSequence}s or a string for
	   * {@link StringLikeSequence}s).
	   *
	   * @returns {Array|string|Object} The value resulting from fully evaluating
	   *     the sequence.
	   */
	  Sequence.prototype.value = function value() {
	    return this.toArray();
	  };

	  /**
	   * Applies the current transformation chain to a given source, returning the
	   * resulting value.
	   *
	   * @examples
	   * var sequence = Lazy([])
	   *   .map(function(x) { return x * -1; })
	   *   .filter(function(x) { return x % 2 === 0; });
	   *
	   * sequence.apply([1, 2, 3, 4]); // => [-2, -4]
	   */
	  Sequence.prototype.apply = function apply(source) {
	    var root = this.root(),
	        previousSource = root.source,
	        result;

	    try {
	      root.source = source;
	      result = this.value();
	    } finally {
	      root.source = previousSource;
	    }

	    return result;
	  };

	  /**
	   * The Iterator object provides an API for iterating over a sequence.
	   *
	   * The purpose of the `Iterator` type is mainly to offer an agnostic way of
	   * iterating over a sequence -- either synchronous (i.e. with a `while` loop)
	   * or asynchronously (with recursive calls to either `setTimeout` or --- if
	   * available --- `setImmediate`). It is not intended to be used directly by
	   * application code.
	   *
	   * @public
	   * @constructor
	   * @param {Sequence} sequence The sequence to iterate over.
	   */
	  function Iterator(sequence) {
	    this.sequence = sequence;
	    this.index    = -1;
	  }

	  /**
	   * Gets the current item this iterator is pointing to.
	   *
	   * @public
	   * @returns {*} The current item.
	   */
	  Iterator.prototype.current = function current() {
	    return this.cachedIndex && this.cachedIndex.get(this.index);
	  };

	  /**
	   * Moves the iterator to the next item in a sequence, if possible.
	   *
	   * @public
	   * @returns {boolean} True if the iterator is able to move to a new item, or else
	   *     false.
	   */
	  Iterator.prototype.moveNext = function moveNext() {
	    var cachedIndex = this.cachedIndex;

	    if (!cachedIndex) {
	      cachedIndex = this.cachedIndex = this.sequence.getIndex();
	    }

	    if (this.index >= cachedIndex.length() - 1) {
	      return false;
	    }

	    ++this.index;
	    return true;
	  };

	  /**
	   * Creates an array snapshot of a sequence.
	   *
	   * Note that for indefinite sequences, this method may raise an exception or
	   * (worse) cause the environment to hang.
	   *
	   * @public
	   * @returns {Array} An array containing the current contents of the sequence.
	   *
	   * @examples
	   * Lazy([1, 2, 3]).toArray() // => [1, 2, 3]
	   */
	  Sequence.prototype.toArray = function toArray() {
	    return this.reduce(function(arr, element) {
	      arr.push(element);
	      return arr;
	    }, []);
	  };

	  /**
	   * Provides an indexed view into the sequence.
	   *
	   * For sequences that are already indexed, this will simply return the
	   * sequence. For non-indexed sequences, this will eagerly evaluate the
	   * sequence.
	   *
	   * @returns {ArrayLikeSequence} A sequence containing the current contents of
	   *     the sequence.
	   *
	   * @examples
	   * Lazy([1, 2, 3]).filter(isEven)            // instanceof Lazy.Sequence
	   * Lazy([1, 2, 3]).filter(isEven).getIndex() // instanceof Lazy.ArrayLikeSequence
	   */
	  Sequence.prototype.getIndex = function getIndex() {
	    return new ArrayWrapper(this.toArray());
	  };

	  /**
	   * Returns the element at the specified index. Note that, for sequences that
	   * are not {@link ArrayLikeSequence}s, this may require partially evaluating
	   * the sequence, iterating to reach the result. (In other words for such
	   * sequences this method is not O(1).)
	   *
	   * @public
	   * @param {number} i The index to access.
	   * @returns {*} The element.
	   *
	   */
	  Sequence.prototype.get = function get(i) {
	    var element;
	    this.each(function(e, index) {
	      if (index === i) {
	        element = e;
	        return false;
	      }
	    });
	    return element;
	  };

	  /**
	   * Provides an indexed, memoized view into the sequence. This will cache the
	   * result whenever the sequence is first iterated, so that subsequent
	   * iterations will access the same element objects.
	   *
	   * @public
	   * @returns {ArrayLikeSequence} An indexed, memoized sequence containing this
	   *     sequence's elements, cached after the first iteration.
	   *
	   * @example
	   * function createObject() { return new Object(); }
	   *
	   * var plain    = Lazy.generate(createObject, 10),
	   *     memoized = Lazy.generate(createObject, 10).memoize();
	   *
	   * plain.toArray()[0] === plain.toArray()[0];       // => false
	   * memoized.toArray()[0] === memoized.toArray()[0]; // => true
	   */
	  Sequence.prototype.memoize = function memoize() {
	    return new MemoizedSequence(this);
	  };

	  /**
	   * @constructor
	   */
	  function MemoizedSequence(parent) {
	    this.parent = parent;
	  }

	  // MemoizedSequence needs to have its prototype set up after ArrayLikeSequence

	  /**
	   * Creates an object from a sequence of key/value pairs.
	   *
	   * @public
	   * @returns {Object} An object with keys and values corresponding to the pairs
	   *     of elements in the sequence.
	   *
	   * @examples
	   * var details = [
	   *   ["first", "Dan"],
	   *   ["last", "Tao"],
	   *   ["age", 29]
	   * ];
	   *
	   * Lazy(details).toObject() // => { first: "Dan", last: "Tao", age: 29 }
	   */
	  Sequence.prototype.toObject = function toObject() {
	    return this.reduce(function(object, pair) {
	      object[pair[0]] = pair[1];
	      return object;
	    }, {});
	  };

	  /**
	   * Iterates over this sequence and executes a function for every element.
	   *
	   * @public
	   * @aka forEach
	   * @param {Function} fn The function to call on each element in the sequence.
	   *     Return false from the function to end the iteration.
	   * @returns {boolean} `true` if the iteration evaluated the entire sequence,
	   *     or `false` if iteration was ended early.
	   *
	   * @examples
	   * Lazy([1, 2, 3, 4]).each(fn) // calls fn 4 times
	   */
	  Sequence.prototype.each = function each(fn) {
	    var iterator = this.getIterator(),
	        i = -1;

	    while (iterator.moveNext()) {
	      if (fn(iterator.current(), ++i) === false) {
	        return false;
	      }
	    }

	    return true;
	  };

	  Sequence.prototype.forEach = function forEach(fn) {
	    return this.each(fn);
	  };

	  /**
	   * Creates a new sequence whose values are calculated by passing this sequence's
	   * elements through some mapping function.
	   *
	   * @public
	   * @aka collect
	   * @param {Function} mapFn The mapping function used to project this sequence's
	   *     elements onto a new sequence. This function takes up to two arguments:
	   *     the element, and the current index.
	   * @returns {Sequence} The new sequence.
	   *
	   * @examples
	   * function addIndexToValue(e, i) { return e + i; }
	   *
	   * Lazy([]).map(increment)              // sequence: []
	   * Lazy([1, 2, 3]).map(increment)       // sequence: [2, 3, 4]
	   * Lazy([1, 2, 3]).map(addIndexToValue) // sequence: [1, 3, 5]
	   *
	   * @benchmarks
	   * function increment(x) { return x + 1; }
	   *
	   * var smArr = Lazy.range(10).toArray(),
	   *     lgArr = Lazy.range(100).toArray();
	   *
	   * Lazy(smArr).map(increment).each(Lazy.noop) // lazy - 10 elements
	   * Lazy(lgArr).map(increment).each(Lazy.noop) // lazy - 100 elements
	   * _.each(_.map(smArr, increment), _.noop)    // lodash - 10 elements
	   * _.each(_.map(lgArr, increment), _.noop)    // lodash - 100 elements
	   */
	  Sequence.prototype.map = function map(mapFn) {
	    return new MappedSequence(this, createCallback(mapFn));
	  };

	  Sequence.prototype.collect = function collect(mapFn) {
	    return this.map(mapFn);
	  };

	  /**
	   * @constructor
	   */
	  function MappedSequence(parent, mapFn) {
	    this.parent = parent;
	    this.mapFn  = mapFn;
	  }

	  MappedSequence.prototype = new Sequence();

	  MappedSequence.prototype.getIterator = function getIterator() {
	    return new MappingIterator(this.parent, this.mapFn);
	  };

	  MappedSequence.prototype.each = function each(fn) {
	    var mapFn = this.mapFn;
	    return this.parent.each(function(e, i) {
	      return fn(mapFn(e, i), i);
	    });
	  };

	  /**
	   * @constructor
	   */
	  function MappingIterator(sequence, mapFn) {
	    this.iterator = sequence.getIterator();
	    this.mapFn    = mapFn;
	    this.index    = -1;
	  }

	  MappingIterator.prototype.current = function current() {
	    return this.mapFn(this.iterator.current(), this.index);
	  };

	  MappingIterator.prototype.moveNext = function moveNext() {
	    if (this.iterator.moveNext()) {
	      ++this.index;
	      return true;
	    }

	    return false;
	  };

	  /**
	   * Creates a new sequence whose values are calculated by accessing the specified
	   * property from each element in this sequence.
	   *
	   * @public
	   * @param {string} propertyName The name of the property to access for every
	   *     element in this sequence.
	   * @returns {Sequence} The new sequence.
	   *
	   * @examples
	   * var people = [
	   *   { first: "Dan", last: "Tao" },
	   *   { first: "Bob", last: "Smith" }
	   * ];
	   *
	   * Lazy(people).pluck("last") // sequence: ["Tao", "Smith"]
	   */
	  Sequence.prototype.pluck = function pluck(property) {
	    return this.map(property);
	  };

	  /**
	   * Creates a new sequence whose values are calculated by invoking the specified
	   * function on each element in this sequence.
	   *
	   * @public
	   * @param {string} methodName The name of the method to invoke for every element
	   *     in this sequence.
	   * @returns {Sequence} The new sequence.
	   *
	   * @examples
	   * function Person(first, last) {
	   *   this.fullName = function fullName() {
	   *     return first + " " + last;
	   *   };
	   * }
	   *
	   * var people = [
	   *   new Person("Dan", "Tao"),
	   *   new Person("Bob", "Smith")
	   * ];
	   *
	   * Lazy(people).invoke("fullName") // sequence: ["Dan Tao", "Bob Smith"]
	   */
	  Sequence.prototype.invoke = function invoke(methodName) {
	    return this.map(function(e) {
	      return e[methodName]();
	    });
	  };

	  /**
	   * Creates a new sequence whose values are the elements of this sequence which
	   * satisfy the specified predicate.
	   *
	   * @public
	   * @aka select
	   * @param {Function} filterFn The predicate to call on each element in this
	   *     sequence, which returns true if the element should be included.
	   * @returns {Sequence} The new sequence.
	   *
	   * @examples
	   * var numbers = [1, 2, 3, 4, 5, 6];
	   *
	   * Lazy(numbers).filter(isEven) // sequence: [2, 4, 6]
	   *
	   * @benchmarks
	   * function isEven(x) { return x % 2 === 0; }
	   *
	   * var smArr = Lazy.range(10).toArray(),
	   *     lgArr = Lazy.range(100).toArray();
	   *
	   * Lazy(smArr).filter(isEven).each(Lazy.noop) // lazy - 10 elements
	   * Lazy(lgArr).filter(isEven).each(Lazy.noop) // lazy - 100 elements
	   * _.each(_.filter(smArr, isEven), _.noop)    // lodash - 10 elements
	   * _.each(_.filter(lgArr, isEven), _.noop)    // lodash - 100 elements
	   */
	  Sequence.prototype.filter = function filter(filterFn) {
	    return new FilteredSequence(this, createCallback(filterFn));
	  };

	  Sequence.prototype.select = function select(filterFn) {
	    return this.filter(filterFn);
	  };

	  /**
	   * @constructor
	   */
	  function FilteredSequence(parent, filterFn) {
	    this.parent   = parent;
	    this.filterFn = filterFn;
	  }

	  FilteredSequence.prototype = new Sequence();

	  FilteredSequence.prototype.getIterator = function getIterator() {
	    return new FilteringIterator(this.parent, this.filterFn);
	  };

	  FilteredSequence.prototype.each = function each(fn) {
	    var filterFn = this.filterFn,
	        j = 0;

	    return this.parent.each(function(e, i) {
	      if (filterFn(e, i)) {
	        return fn(e, j++);
	      }
	    });
	  };

	  FilteredSequence.prototype.reverse = function reverse() {
	    return this.parent.reverse().filter(this.filterFn);
	  };

	  /**
	   * @constructor
	   */
	  function FilteringIterator(sequence, filterFn) {
	    this.iterator = sequence.getIterator();
	    this.filterFn = filterFn;
	    this.index    = 0;
	  }

	  FilteringIterator.prototype.current = function current() {
	    return this.value;
	  };

	  FilteringIterator.prototype.moveNext = function moveNext() {
	    var iterator = this.iterator,
	        filterFn = this.filterFn,
	        value;

	    while (iterator.moveNext()) {
	      value = iterator.current();
	      if (filterFn(value, this.index++)) {
	        this.value = value;
	        return true;
	      }
	    }

	    this.value = undefined;
	    return false;
	  };

	  /**
	   * Creates a new sequence whose values exclude the elements of this sequence
	   * identified by the specified predicate.
	   *
	   * @public
	   * @param {Function} rejectFn The predicate to call on each element in this
	   *     sequence, which returns true if the element should be omitted.
	   * @returns {Sequence} The new sequence.
	   *
	   * @examples
	   * Lazy([1, 2, 3, 4, 5]).reject(isEven)              // sequence: [1, 3, 5]
	   * Lazy([{ foo: 1 }, { bar: 2 }]).reject('foo')      // sequence: [{ bar: 2 }]
	   * Lazy([{ foo: 1 }, { foo: 2 }]).reject({ foo: 2 }) // sequence: [{ foo: 1 }]
	   */
	  Sequence.prototype.reject = function reject(rejectFn) {
	    rejectFn = createCallback(rejectFn);
	    return this.filter(function(e) { return !rejectFn(e); });
	  };

	  /**
	   * Creates a new sequence whose values have the specified type, as determined
	   * by the `typeof` operator.
	   *
	   * @public
	   * @param {string} type The type of elements to include from the underlying
	   *     sequence, i.e. where `typeof [element] === [type]`.
	   * @returns {Sequence} The new sequence, comprising elements of the specified
	   *     type.
	   *
	   * @examples
	   * Lazy([1, 2, 'foo', 'bar']).ofType('number')  // sequence: [1, 2]
	   * Lazy([1, 2, 'foo', 'bar']).ofType('string')  // sequence: ['foo', 'bar']
	   * Lazy([1, 2, 'foo', 'bar']).ofType('boolean') // sequence: []
	   */
	  Sequence.prototype.ofType = function ofType(type) {
	    return this.filter(function(e) { return typeof e === type; });
	  };

	  /**
	   * Creates a new sequence whose values are the elements of this sequence with
	   * property names and values matching those of the specified object.
	   *
	   * @public
	   * @param {Object} properties The properties that should be found on every
	   *     element that is to be included in this sequence.
	   * @returns {Sequence} The new sequence.
	   *
	   * @examples
	   * var people = [
	   *   { first: "Dan", last: "Tao" },
	   *   { first: "Bob", last: "Smith" }
	   * ];
	   *
	   * Lazy(people).where({ first: "Dan" }) // sequence: [{ first: "Dan", last: "Tao" }]
	   *
	   * @benchmarks
	   * var animals = ["dog", "cat", "mouse", "horse", "pig", "snake"];
	   *
	   * Lazy(animals).where({ length: 3 }).each(Lazy.noop) // lazy
	   * _.each(_.where(animals, { length: 3 }), _.noop)    // lodash
	   */
	  Sequence.prototype.where = function where(properties) {
	    return this.filter(properties);
	  };

	  /**
	   * Creates a new sequence with the same elements as this one, but to be iterated
	   * in the opposite order.
	   *
	   * Note that in some (but not all) cases, the only way to create such a sequence
	   * may require iterating the entire underlying source when `each` is called.
	   *
	   * @public
	   * @returns {Sequence} The new sequence.
	   *
	   * @examples
	   * Lazy([1, 2, 3]).reverse() // sequence: [3, 2, 1]
	   * Lazy([]).reverse()        // sequence: []
	   */
	  Sequence.prototype.reverse = function reverse() {
	    return new ReversedSequence(this);
	  };

	  /**
	   * @constructor
	   */
	  function ReversedSequence(parent) {
	    this.parent = parent;
	  }

	  ReversedSequence.prototype = new Sequence();

	  ReversedSequence.prototype.getIterator = function getIterator() {
	    return new ReversedIterator(this.parent);
	  };

	  /**
	   * @constuctor
	   */
	  function ReversedIterator(sequence) {
	    this.sequence = sequence;
	  }

	  ReversedIterator.prototype.current = function current() {
	    return this.getIndex().get(this.index);
	  };

	  ReversedIterator.prototype.moveNext = function moveNext() {
	    var index  = this.getIndex(),
	        length = index.length();

	    if (typeof this.index === "undefined") {
	      this.index = length;
	    }

	    return (--this.index >= 0);
	  };

	  ReversedIterator.prototype.getIndex = function getIndex() {
	    if (!this.cachedIndex) {
	      this.cachedIndex = this.sequence.getIndex();
	    }

	    return this.cachedIndex;
	  };

	  /**
	   * Creates a new sequence with all of the elements of this one, plus those of
	   * the given array(s).
	   *
	   * @public
	   * @param {...*} var_args One or more values (or arrays of values) to use for
	   *     additional items after this sequence.
	   * @returns {Sequence} The new sequence.
	   *
	   * @examples
	   * var left  = [1, 2, 3];
	   * var right = [4, 5, 6];
	   *
	   * Lazy(left).concat(right)         // sequence: [1, 2, 3, 4, 5, 6]
	   * Lazy(left).concat(Lazy(right))   // sequence: [1, 2, 3, 4, 5, 6]
	   * Lazy(left).concat(right, [7, 8]) // sequence: [1, 2, 3, 4, 5, 6, 7, 8]
	   */
	  Sequence.prototype.concat = function concat(var_args) {
	    return new ConcatenatedSequence(this, arraySlice.call(arguments, 0));
	  };

	  /**
	   * @constructor
	   */
	  function ConcatenatedSequence(parent, arrays) {
	    this.parent = parent;
	    this.arrays = arrays;
	  }

	  ConcatenatedSequence.prototype = new Sequence();

	  ConcatenatedSequence.prototype.each = function each(fn) {
	    var done = false,
	        i = 0;

	    this.parent.each(function(e) {
	      if (fn(e, i++) === false) {
	        done = true;
	        return false;
	      }
	    });

	    if (!done) {
	      Lazy(this.arrays).flatten().each(function(e) {
	        if (fn(e, i++) === false) {
	          return false;
	        }
	      });
	    }
	  };

	  /**
	   * Creates a new sequence comprising the first N elements from this sequence, OR
	   * (if N is `undefined`) simply returns the first element of this sequence.
	   *
	   * @public
	   * @aka head, take
	   * @param {number=} count The number of elements to take from this sequence. If
	   *     this value exceeds the length of the sequence, the resulting sequence
	   *     will be essentially the same as this one.
	   * @returns {*} The new sequence (or the first element from this sequence if
	   *     no count was given).
	   *
	   * @examples
	   * function powerOfTwo(exp) {
	   *   return Math.pow(2, exp);
	   * }
	   *
	   * Lazy.generate(powerOfTwo).first()          // => 1
	   * Lazy.generate(powerOfTwo).first(5)         // sequence: [1, 2, 4, 8, 16]
	   * Lazy.generate(powerOfTwo).skip(2).first()  // => 4
	   * Lazy.generate(powerOfTwo).skip(2).first(2) // sequence: [4, 8]
	   */
	  Sequence.prototype.first = function first(count) {
	    if (typeof count === "undefined") {
	      return getFirst(this);
	    }
	    return new TakeSequence(this, count);
	  };

	  Sequence.prototype.head =
	  Sequence.prototype.take = function (count) {
	    return this.first(count);
	  };

	  /**
	   * @constructor
	   */
	  function TakeSequence(parent, count) {
	    this.parent = parent;
	    this.count  = count;
	  }

	  TakeSequence.prototype = new Sequence();

	  TakeSequence.prototype.getIterator = function getIterator() {
	    return new TakeIterator(this.parent, this.count);
	  };

	  TakeSequence.prototype.each = function each(fn) {
	    var count = this.count,
	        i     = 0;

	    var result;
	    var handle = this.parent.each(function(e) {
	      if (i < count) { result = fn(e, i++); }
	      if (i >= count) { return false; }
	      return result;
	    });

	    if (handle instanceof AsyncHandle) {
	      return handle;
	    }

	    return i === count && result !== false;
	  };

	  /**
	   * @constructor
	   */
	  function TakeIterator(sequence, count) {
	    this.iterator = sequence.getIterator();
	    this.count    = count;
	  }

	  TakeIterator.prototype.current = function current() {
	    return this.iterator.current();
	  };

	  TakeIterator.prototype.moveNext = function moveNext() {
	    return ((--this.count >= 0) && this.iterator.moveNext());
	  };

	  /**
	   * Creates a new sequence comprising the elements from the head of this sequence
	   * that satisfy some predicate. Once an element is encountered that doesn't
	   * satisfy the predicate, iteration will stop.
	   *
	   * @public
	   * @param {Function} predicate
	   * @returns {Sequence} The new sequence
	   *
	   * @examples
	   * function lessThan(x) {
	   *   return function(y) {
	   *     return y < x;
	   *   };
	   * }
	   *
	   * Lazy([1, 2, 3, 4]).takeWhile(lessThan(3)) // sequence: [1, 2]
	   * Lazy([1, 2, 3, 4]).takeWhile(lessThan(0)) // sequence: []
	   */
	  Sequence.prototype.takeWhile = function takeWhile(predicate) {
	    return new TakeWhileSequence(this, predicate);
	  };

	  /**
	   * @constructor
	   */
	  function TakeWhileSequence(parent, predicate) {
	    this.parent    = parent;
	    this.predicate = predicate;
	  }

	  TakeWhileSequence.prototype = new Sequence();

	  TakeWhileSequence.prototype.each = function each(fn) {
	    var predicate = this.predicate,
	        finished = false,
	        j = 0;

	    var result = this.parent.each(function(e, i) {
	      if (!predicate(e, i)) {
	        finished = true;
	        return false;
	      }

	      return fn(e, j++);
	    });

	    if (result instanceof AsyncHandle) {
	      return result;
	    }

	    return finished;
	  };

	  /**
	   * Creates a new sequence comprising all but the last N elements of this
	   * sequence.
	   *
	   * @public
	   * @param {number=} count The number of items to omit from the end of the
	   *     sequence (defaults to 1).
	   * @returns {Sequence} The new sequence.
	   *
	   * @examples
	   * Lazy([1, 2, 3, 4]).initial()                    // sequence: [1, 2, 3]
	   * Lazy([1, 2, 3, 4]).initial(2)                   // sequence: [1, 2]
	   * Lazy([1, 2, 3]).filter(Lazy.identity).initial() // sequence: [1, 2]
	   */
	  Sequence.prototype.initial = function initial(count) {
	    return new InitialSequence(this, count);
	  };

	  function InitialSequence(parent, count) {
	    this.parent = parent;
	    this.count = typeof count === "number" ? count : 1;
	  }

	  InitialSequence.prototype = new Sequence();

	  InitialSequence.prototype.each = function each(fn) {
	    var index = this.parent.getIndex();
	    return index.take(index.length() - this.count).each(fn);
	  };

	  /**
	   * Creates a new sequence comprising the last N elements of this sequence, OR
	   * (if N is `undefined`) simply returns the last element of this sequence.
	   *
	   * @public
	   * @param {number=} count The number of items to take from the end of the
	   *     sequence.
	   * @returns {*} The new sequence (or the last element from this sequence
	   *     if no count was given).
	   *
	   * @examples
	   * Lazy([1, 2, 3]).last()                 // => 3
	   * Lazy([1, 2, 3]).last(2)                // sequence: [2, 3]
	   * Lazy([1, 2, 3]).filter(isEven).last(2) // sequence: [2]
	   */
	  Sequence.prototype.last = function last(count) {
	    if (typeof count === "undefined") {
	      return this.reverse().first();
	    }
	    return this.reverse().take(count).reverse();
	  };

	  /**
	   * Returns the first element in this sequence with property names and values
	   * matching those of the specified object.
	   *
	   * @public
	   * @param {Object} properties The properties that should be found on some
	   *     element in this sequence.
	   * @returns {*} The found element, or `undefined` if none exists in this
	   *     sequence.
	   *
	   * @examples
	   * var words = ["foo", "bar"];
	   *
	   * Lazy(words).findWhere({ 0: "f" }); // => "foo"
	   * Lazy(words).findWhere({ 0: "z" }); // => undefined
	   */
	  Sequence.prototype.findWhere = function findWhere(properties) {
	    return this.where(properties).first();
	  };

	  /**
	   * Creates a new sequence comprising all but the first N elements of this
	   * sequence.
	   *
	   * @public
	   * @aka skip, tail, rest
	   * @param {number=} count The number of items to omit from the beginning of the
	   *     sequence (defaults to 1).
	   * @returns {Sequence} The new sequence.
	   *
	   * @examples
	   * Lazy([1, 2, 3, 4]).rest()  // sequence: [2, 3, 4]
	   * Lazy([1, 2, 3, 4]).rest(0) // sequence: [1, 2, 3, 4]
	   * Lazy([1, 2, 3, 4]).rest(2) // sequence: [3, 4]
	   * Lazy([1, 2, 3, 4]).rest(5) // sequence: []
	   */
	  Sequence.prototype.rest = function rest(count) {
	    return new DropSequence(this, count);
	  };

	  Sequence.prototype.skip =
	  Sequence.prototype.tail =
	  Sequence.prototype.drop = function drop(count) {
	    return this.rest(count);
	  };

	  /**
	   * @constructor
	   */
	  function DropSequence(parent, count) {
	    this.parent = parent;
	    this.count  = typeof count === "number" ? count : 1;
	  }

	  DropSequence.prototype = new Sequence();

	  DropSequence.prototype.each = function each(fn) {
	    var count   = this.count,
	        dropped = 0,
	        i       = 0;

	    return this.parent.each(function(e) {
	      if (dropped++ < count) { return; }
	      return fn(e, i++);
	    });
	  };

	  /**
	   * Creates a new sequence comprising the elements from this sequence *after*
	   * those that satisfy some predicate. The sequence starts with the first
	   * element that does not match the predicate.
	   *
	   * @public
	   * @aka skipWhile
	   * @param {Function} predicate
	   * @returns {Sequence} The new sequence
	   */
	  Sequence.prototype.dropWhile = function dropWhile(predicate) {
	    return new DropWhileSequence(this, predicate);
	  };

	  Sequence.prototype.skipWhile = function skipWhile(predicate) {
	    return this.dropWhile(predicate);
	  };

	  /**
	   * @constructor
	   */
	  function DropWhileSequence(parent, predicate) {
	    this.parent    = parent;
	    this.predicate = predicate;
	  }

	  DropWhileSequence.prototype = new Sequence();

	  DropWhileSequence.prototype.each = function each(fn) {
	    var predicate = this.predicate,
	        done      = false;

	    return this.parent.each(function(e) {
	      if (!done) {
	        if (predicate(e)) {
	          return;
	        }

	        done = true;
	      }

	      return fn(e);
	    });
	  };

	  /**
	   * Creates a new sequence with the same elements as this one, but ordered
	   * using the specified comparison function.
	   *
	   * This has essentially the same behavior as calling
	   * [`Array#sort`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/sort),
	   * but obviously instead of modifying the collection it returns a new
	   * {@link Sequence} object.
	   *
	   * @public
	   * @param {Function=} sortFn The function used to compare elements in the
	   *     sequence. The function will be passed two elements and should return:
	   *     - 1 if the first is greater
	   *     - -1 if the second is greater
	   *     - 0 if the two values are the same
	   * @param {boolean} descending Whether or not the resulting sequence should be
	   *     in descending order (defaults to `false`).
	   * @returns {Sequence} The new sequence.
	   *
	   * @examples
	   * Lazy([5, 10, 1]).sort()                // sequence: [1, 5, 10]
	   * Lazy(['foo', 'bar']).sort()            // sequence: ['bar', 'foo']
	   * Lazy(['b', 'c', 'a']).sort(null, true) // sequence: ['c', 'b', 'a']
	   * Lazy([5, 10, 1]).sort(null, true)      // sequence: [10, 5, 1]
	   *
	   * // Sorting w/ custom comparison function
	   * Lazy(['a', 'ab', 'aa', 'ba', 'b', 'abc']).sort(function compare(x, y) {
	   *   if (x.length && (x.length !== y.length)) { return compare(x.length, y.length); }
	   *   if (x === y) { return 0; }
	   *   return x > y ? 1 : -1;
	   * });
	   * // => sequence: ['a', 'b', 'aa', 'ab', 'ba', 'abc']
	   */
	  Sequence.prototype.sort = function sort(sortFn, descending) {
	    sortFn || (sortFn = compare);
	    if (descending) { sortFn = reverseArguments(sortFn); }
	    return new SortedSequence(this, sortFn);
	  };

	  /**
	   * Creates a new sequence with the same elements as this one, but ordered by
	   * the results of the given function.
	   *
	   * You can pass:
	   *
	   * - a *string*, to sort by the named property
	   * - a function, to sort by the result of calling the function on each element
	   *
	   * @public
	   * @param {Function} sortFn The function to call on the elements in this
	   *     sequence, in order to sort them.
	   * @param {boolean} descending Whether or not the resulting sequence should be
	   *     in descending order (defaults to `false`).
	   * @returns {Sequence} The new sequence.
	   *
	   * @examples
	   * function population(country) {
	   *   return country.pop;
	   * }
	   *
	   * function area(country) {
	   *   return country.sqkm;
	   * }
	   *
	   * var countries = [
	   *   { name: "USA", pop: 320000000, sqkm: 9600000 },
	   *   { name: "Brazil", pop: 194000000, sqkm: 8500000 },
	   *   { name: "Nigeria", pop: 174000000, sqkm: 924000 },
	   *   { name: "China", pop: 1350000000, sqkm: 9700000 },
	   *   { name: "Russia", pop: 143000000, sqkm: 17000000 },
	   *   { name: "Australia", pop: 23000000, sqkm: 7700000 }
	   * ];
	   *
	   * Lazy(countries).sortBy(population).last(3).pluck('name') // sequence: ["Brazil", "USA", "China"]
	   * Lazy(countries).sortBy(area).last(3).pluck('name')       // sequence: ["USA", "China", "Russia"]
	   * Lazy(countries).sortBy(area, true).first(3).pluck('name') // sequence: ["Russia", "China", "USA"]
	   *
	   * @benchmarks
	   * var randoms = Lazy.generate(Math.random).take(100).toArray();
	   *
	   * Lazy(randoms).sortBy(Lazy.identity).each(Lazy.noop) // lazy
	   * _.each(_.sortBy(randoms, Lazy.identity), _.noop)    // lodash
	   */
	  Sequence.prototype.sortBy = function sortBy(sortFn, descending) {
	    sortFn = createComparator(sortFn);
	    if (descending) { sortFn = reverseArguments(sortFn); }
	    return new SortedSequence(this, sortFn);
	  };

	  /**
	   * @constructor
	   */
	  function SortedSequence(parent, sortFn) {
	    this.parent = parent;
	    this.sortFn = sortFn;
	  }

	  SortedSequence.prototype = new Sequence();

	  SortedSequence.prototype.each = function each(fn) {
	    var sortFn = this.sortFn,
	        result = this.parent.toArray();

	    result.sort(sortFn);

	    return forEach(result, fn);
	  };

	  /**
	   * @examples
	   * var items = [{ a: 4 }, { a: 3 }, { a: 5 }];
	   *
	   * Lazy(items).sortBy('a').reverse();
	   * // => sequence: [{ a: 5 }, { a: 4 }, { a: 3 }]
	   *
	   * Lazy(items).sortBy('a').reverse().reverse();
	   * // => sequence: [{ a: 3 }, { a: 4 }, { a: 5 }]
	   */
	  SortedSequence.prototype.reverse = function reverse() {
	    return new SortedSequence(this.parent, reverseArguments(this.sortFn));
	  };

	  /**
	   * Creates a new {@link ObjectLikeSequence} comprising the elements in this
	   * one, grouped together according to some key. The value associated with each
	   * key in the resulting object-like sequence is an array containing all of
	   * the elements in this sequence with that key.
	   *
	   * @public
	   * @param {Function|string} keyFn The function to call on the elements in this
	   *     sequence to obtain a key by which to group them, or a string representing
	   *     a parameter to read from all the elements in this sequence.
	   * @param {Function|string} valFn (Optional) The function to call on the elements
	   *     in this sequence to assign to the value for each instance to appear in the
	   *     group, or a string representing a parameter to read from all the elements
	   *     in this sequence.
	   * @returns {ObjectLikeSequence} The new sequence.
	   *
	   * @examples
	   * function oddOrEven(x) {
	   *   return x % 2 === 0 ? 'even' : 'odd';
	   * }
	   * function square(x) {
	   *   return x*x;
	   * }
	   *
	   * var numbers = [1, 2, 3, 4, 5];
	   *
	   * Lazy(numbers).groupBy(oddOrEven)                     // sequence: { odd: [1, 3, 5], even: [2, 4] }
	   * Lazy(numbers).groupBy(oddOrEven).get("odd")          // => [1, 3, 5]
	   * Lazy(numbers).groupBy(oddOrEven).get("foo")          // => undefined
	   * Lazy(numbers).groupBy(oddOrEven, square).get("even") // => [4, 16]
	   *
	   * Lazy([
	   *   { name: 'toString' },
	   *   { name: 'toString' }
	   * ]).groupBy('name');
	   * // => sequence: {
	   *   'toString': [
	   *     { name: 'toString' },
	   *     { name: 'toString' }
	   *   ]
	   * }
	   */
	  Sequence.prototype.groupBy = function groupBy(keyFn, valFn) {
	    return new GroupedSequence(this, keyFn, valFn);
	  };

	  /**
	   * @constructor
	   */
	  function GroupedSequence(parent, keyFn, valFn) {
	    this.parent = parent;
	    this.keyFn  = keyFn;
	    this.valFn  = valFn;
	  }

	  // GroupedSequence must have its prototype set after ObjectLikeSequence has
	  // been fully initialized.

	  /**
	   * Creates a new {@link ObjectLikeSequence} comprising the elements in this
	   * one, indexed according to some key.
	   *
	   * @public
	   * @param {Function|string} keyFn The function to call on the elements in this
	   *     sequence to obtain a key by which to index them, or a string
	   *     representing a property to read from all the elements in this sequence.
	   * @param {Function|string} valFn (Optional) The function to call on the elements
	   *     in this sequence to assign to the value of the indexed object, or a string
	   *     representing a parameter to read from all the elements in this sequence.
	   * @returns {Sequence} The new sequence.
	   *
	   * @examples
	   * var people = [
	   *   { name: 'Bob', age: 25 },
	   *   { name: 'Fred', age: 34 }
	   * ];
	   *
	   * var bob  = people[0],
	   *     fred = people[1];
	   *
	   * Lazy(people).indexBy('name')        // sequence: { 'Bob': bob, 'Fred': fred }
	   * Lazy(people).indexBy('name', 'age') // sequence: { 'Bob': 25, 'Fred': 34 }
	   */
	  Sequence.prototype.indexBy = function(keyFn, valFn) {
	    return new IndexedSequence(this, keyFn, valFn);
	  };

	  /**
	   * @constructor
	   */
	  function IndexedSequence(parent, keyFn, valFn) {
	    this.parent = parent;
	    this.keyFn  = keyFn;
	    this.valFn  = valFn;
	  }

	  // IndexedSequence must have its prototype set after ObjectLikeSequence has
	  // been fully initialized.

	  /**
	   * Creates a new {@link ObjectLikeSequence} containing the unique keys of all
	   * the elements in this sequence, each paired with the number of elements
	   * in this sequence having that key.
	   *
	   * @public
	   * @param {Function|string} keyFn The function to call on the elements in this
	   *     sequence to obtain a key by which to count them, or a string representing
	   *     a parameter to read from all the elements in this sequence.
	   * @returns {Sequence} The new sequence.
	   *
	   * @examples
	   * function oddOrEven(x) {
	   *   return x % 2 === 0 ? 'even' : 'odd';
	   * }
	   *
	   * var numbers = [1, 2, 3, 4, 5];
	   *
	   * Lazy(numbers).countBy(oddOrEven)            // sequence: { odd: 3, even: 2 }
	   * Lazy(numbers).countBy(oddOrEven).get("odd") // => 3
	   * Lazy(numbers).countBy(oddOrEven).get("foo") // => undefined
	   */
	  Sequence.prototype.countBy = function countBy(keyFn) {
	    return new CountedSequence(this, keyFn);
	  };

	  /**
	   * @constructor
	   */
	  function CountedSequence(parent, keyFn) {
	    this.parent = parent;
	    this.keyFn  = keyFn;
	  }

	  // CountedSequence, like GroupedSequence, must have its prototype set after
	  // ObjectLikeSequence has been fully initialized.

	  /**
	   * Creates a new sequence with every unique element from this one appearing
	   * exactly once (i.e., with duplicates removed).
	   *
	   * @public
	   * @aka unique
	   * @param {Function} keyFn An optional function to produce the key for each
	   *     object. This key is then tested for uniqueness as  opposed to the
	   *     object reference.
	   * @returns {Sequence} The new sequence.
	   *
	   * @examples
	   * Lazy([1, 2, 2, 3, 3, 3]).uniq() // sequence: [1, 2, 3]
	   * Lazy([{ name: 'mike' }, 
	   * 	{ name: 'sarah' }, 
	   * 	{ name: 'mike' }
	   * ]).uniq('name')
	   * // sequence: [{ name: 'mike' }, { name: 'sarah' }]
	   *
	   * @benchmarks
	   * function randomOf(array) {
	   *   return function() {
	   *     return array[Math.floor(Math.random() * array.length)];
	   *   };
	   * }
	   *
	   * var mostUnique = Lazy.generate(randomOf(_.range(100)), 100).toArray(),
	   *     someUnique = Lazy.generate(randomOf(_.range(50)), 100).toArray(),
	   *     mostDupes  = Lazy.generate(randomOf(_.range(5)), 100).toArray();
	   *
	   * Lazy(mostUnique).uniq().each(Lazy.noop) // lazy - mostly unique elements
	   * Lazy(someUnique).uniq().each(Lazy.noop) // lazy - some unique elements
	   * Lazy(mostDupes).uniq().each(Lazy.noop)  // lazy - mostly duplicate elements
	   * _.each(_.uniq(mostUnique), _.noop)      // lodash - mostly unique elements
	   * _.each(_.uniq(someUnique), _.noop)      // lodash - some unique elements
	   * _.each(_.uniq(mostDupes), _.noop)       // lodash - mostly duplicate elements
	   */
	  Sequence.prototype.uniq = function uniq(keyFn) {
	    return new UniqueSequence(this, keyFn);
	  };

	  Sequence.prototype.unique = function unique(keyFn) {
	    return this.uniq(keyFn);
	  };

	  /**
	   * @constructor
	   */
	  function UniqueSequence(parent, keyFn) {
	    this.parent = parent;
	    this.keyFn  = keyFn;
	  }

	  UniqueSequence.prototype = new Sequence();

	  UniqueSequence.prototype.each = function each(fn) {
	    var cache = new Set(),
	        keyFn = this.keyFn,
	        i     = 0;

	    if (keyFn) {
	      keyFn = createCallback(keyFn);
	      return this.parent.each(function(e) {
	        if (cache.add(keyFn(e))) {
	          return fn(e, i++);
	        }
	      });

	    } else {
	      return this.parent.each(function(e) {
	        if (cache.add(e)) {
	          return fn(e, i++);
	        }
	      });
	    }
	  };

	  /**
	   * Creates a new sequence by combining the elements from this sequence with
	   * corresponding elements from the specified array(s).
	   *
	   * @public
	   * @param {...Array} var_args One or more arrays of elements to combine with
	   *     those of this sequence.
	   * @returns {Sequence} The new sequence.
	   *
	   * @examples
	   * Lazy([1, 2]).zip([3, 4]) // sequence: [[1, 3], [2, 4]]
	   *
	   * @benchmarks
	   * var smArrL = Lazy.range(10).toArray(),
	   *     smArrR = Lazy.range(10, 20).toArray(),
	   *     lgArrL = Lazy.range(100).toArray(),
	   *     lgArrR = Lazy.range(100, 200).toArray();
	   *
	   * Lazy(smArrL).zip(smArrR).each(Lazy.noop) // lazy - zipping 10-element arrays
	   * Lazy(lgArrL).zip(lgArrR).each(Lazy.noop) // lazy - zipping 100-element arrays
	   * _.each(_.zip(smArrL, smArrR), _.noop)    // lodash - zipping 10-element arrays
	   * _.each(_.zip(lgArrL, lgArrR), _.noop)    // lodash - zipping 100-element arrays
	   */
	  Sequence.prototype.zip = function zip(var_args) {
	    if (arguments.length === 1) {
	      return new SimpleZippedSequence(this, (/** @type {Array} */ var_args));
	    } else {
	      return new ZippedSequence(this, arraySlice.call(arguments, 0));
	    }
	  };

	  /**
	   * @constructor
	   */
	  function ZippedSequence(parent, arrays) {
	    this.parent = parent;
	    this.arrays = arrays;
	  }

	  ZippedSequence.prototype = new Sequence();

	  ZippedSequence.prototype.each = function each(fn) {
	    var arrays = this.arrays,
	        i = 0;
	    this.parent.each(function(e) {
	      var group = [e];
	      for (var j = 0; j < arrays.length; ++j) {
	        if (arrays[j].length > i) {
	          group.push(arrays[j][i]);
	        }
	      }
	      return fn(group, i++);
	    });
	  };

	  /**
	   * Creates a new sequence with the same elements as this one, in a randomized
	   * order.
	   *
	   * @public
	   * @returns {Sequence} The new sequence.
	   *
	   * @examples
	   * Lazy([1, 2, 3, 4, 5]).shuffle().value() // =~ [1, 2, 3, 4, 5]
	   */
	  Sequence.prototype.shuffle = function shuffle() {
	    return new ShuffledSequence(this);
	  };

	  /**
	   * @constructor
	   */
	  function ShuffledSequence(parent) {
	    this.parent = parent;
	  }

	  ShuffledSequence.prototype = new Sequence();

	  ShuffledSequence.prototype.each = function each(fn) {
	    var shuffled = this.parent.toArray(),
	        floor = Math.floor,
	        random = Math.random,
	        j = 0;

	    for (var i = shuffled.length - 1; i > 0; --i) {
	      swap(shuffled, i, floor(random() * (i + 1)));
	      if (fn(shuffled[i], j++) === false) {
	        return;
	      }
	    }
	    fn(shuffled[0], j);
	  };

	  /**
	   * Creates a new sequence with every element from this sequence, and with arrays
	   * exploded so that a sequence of arrays (of arrays) becomes a flat sequence of
	   * values.
	   *
	   * @public
	   * @returns {Sequence} The new sequence.
	   *
	   * @examples
	   * Lazy([1, [2, 3], [4, [5]]]).flatten() // sequence: [1, 2, 3, 4, 5]
	   * Lazy([1, Lazy([2, 3])]).flatten()     // sequence: [1, 2, 3]
	   */
	  Sequence.prototype.flatten = function flatten() {
	    return new FlattenedSequence(this);
	  };

	  /**
	   * @constructor
	   */
	  function FlattenedSequence(parent) {
	    this.parent = parent;
	  }

	  FlattenedSequence.prototype = new Sequence();

	  FlattenedSequence.prototype.each = function each(fn) {
	    var index = 0;

	    return this.parent.each(function recurseVisitor(e) {
	      if (e instanceof Array) {
	        return forEach(e, recurseVisitor);
	      }

	      if (e instanceof Sequence) {
	        return e.each(recurseVisitor);
	      }

	      return fn(e, index++);
	    });
	  };

	  /**
	   * Creates a new sequence with the same elements as this one, except for all
	   * falsy values (`false`, `0`, `""`, `null`, and `undefined`).
	   *
	   * @public
	   * @returns {Sequence} The new sequence.
	   *
	   * @examples
	   * Lazy(["foo", null, "bar", undefined]).compact() // sequence: ["foo", "bar"]
	   */
	  Sequence.prototype.compact = function compact() {
	    return this.filter(function(e) { return !!e; });
	  };

	  /**
	   * Creates a new sequence with all the elements of this sequence that are not
	   * also among the specified arguments.
	   *
	   * @public
	   * @aka difference
	   * @param {...*} var_args The values, or array(s) of values, to be excluded from the
	   *     resulting sequence.
	   * @returns {Sequence} The new sequence.
	   *
	   * @examples
	   * Lazy([1, 2, 3, 4, 5]).without(2, 3)   // sequence: [1, 4, 5]
	   * Lazy([1, 2, 3, 4, 5]).without([4, 5]) // sequence: [1, 2, 3]
	   */
	  Sequence.prototype.without = function without(var_args) {
	    return new WithoutSequence(this, arraySlice.call(arguments, 0));
	  };

	  Sequence.prototype.difference = function difference(var_args) {
	    return this.without.apply(this, arguments);
	  };

	  /**
	   * @constructor
	   */
	  function WithoutSequence(parent, values) {
	    this.parent = parent;
	    this.values = values;
	  }

	  WithoutSequence.prototype = new Sequence();

	  WithoutSequence.prototype.each = function each(fn) {
	    var set = createSet(this.values),
	        i = 0;
	    return this.parent.each(function(e) {
	      if (!set.contains(e)) {
	        return fn(e, i++);
	      }
	    });
	  };

	  /**
	   * Creates a new sequence with all the unique elements either in this sequence
	   * or among the specified arguments.
	   *
	   * @public
	   * @param {...*} var_args The values, or array(s) of values, to be additionally
	   *     included in the resulting sequence.
	   * @returns {Sequence} The new sequence.
	   *
	   * @examples
	   * Lazy(["foo", "bar"]).union([])             // sequence: ["foo", "bar"]
	   * Lazy(["foo", "bar"]).union(["bar", "baz"]) // sequence: ["foo", "bar", "baz"]
	   */
	  Sequence.prototype.union = function union(var_args) {
	    return this.concat(var_args).uniq();
	  };

	  /**
	   * Creates a new sequence with all the elements of this sequence that also
	   * appear among the specified arguments.
	   *
	   * @public
	   * @param {...*} var_args The values, or array(s) of values, in which elements
	   *     from this sequence must also be included to end up in the resulting sequence.
	   * @returns {Sequence} The new sequence.
	   *
	   * @examples
	   * Lazy(["foo", "bar"]).intersection([])             // sequence: []
	   * Lazy(["foo", "bar"]).intersection(["bar", "baz"]) // sequence: ["bar"]
	   */
	  Sequence.prototype.intersection = function intersection(var_args) {
	    if (arguments.length === 1 && arguments[0] instanceof Array) {
	      return new SimpleIntersectionSequence(this, (/** @type {Array} */ var_args));
	    } else {
	      return new IntersectionSequence(this, arraySlice.call(arguments, 0));
	    }
	  };

	  /**
	   * @constructor
	   */
	  function IntersectionSequence(parent, arrays) {
	    this.parent = parent;
	    this.arrays = arrays;
	  }

	  IntersectionSequence.prototype = new Sequence();

	  IntersectionSequence.prototype.each = function each(fn) {
	    var sets = Lazy(this.arrays).map(function(values) {
	      return new UniqueMemoizer(Lazy(values).getIterator());
	    });

	    var setIterator = new UniqueMemoizer(sets.getIterator()),
	        i = 0;

	    return this.parent.each(function(e) {
	      var includedInAll = true;
	      setIterator.each(function(set) {
	        if (!set.contains(e)) {
	          includedInAll = false;
	          return false;
	        }
	      });

	      if (includedInAll) {
	        return fn(e, i++);
	      }
	    });
	  };

	  /**
	   * @constructor
	   */
	  function UniqueMemoizer(iterator) {
	    this.iterator     = iterator;
	    this.set          = new Set();
	    this.memo         = [];
	    this.currentValue = undefined;
	  }

	  UniqueMemoizer.prototype.current = function current() {
	    return this.currentValue;
	  };

	  UniqueMemoizer.prototype.moveNext = function moveNext() {
	    var iterator = this.iterator,
	        set = this.set,
	        memo = this.memo,
	        current;

	    while (iterator.moveNext()) {
	      current = iterator.current();
	      if (set.add(current)) {
	        memo.push(current);
	        this.currentValue = current;
	        return true;
	      }
	    }
	    return false;
	  };

	  UniqueMemoizer.prototype.each = function each(fn) {
	    var memo = this.memo,
	        length = memo.length,
	        i = -1;

	    while (++i < length) {
	      if (fn(memo[i], i) === false) {
	        return false;
	      }
	    }

	    while (this.moveNext()) {
	      if (fn(this.currentValue, i++) === false) {
	        break;
	      }
	    }
	  };

	  UniqueMemoizer.prototype.contains = function contains(e) {
	    if (this.set.contains(e)) {
	      return true;
	    }

	    while (this.moveNext()) {
	      if (this.currentValue === e) {
	        return true;
	      }
	    }

	    return false;
	  };

	  /**
	   * Checks whether every element in this sequence satisfies a given predicate.
	   *
	   * @public
	   * @aka all
	   * @param {Function} predicate A function to call on (potentially) every element
	   *     in this sequence.
	   * @returns {boolean} True if `predicate` returns true for every element in the
	   *     sequence (or the sequence is empty). False if `predicate` returns false
	   *     for at least one element.
	   *
	   * @examples
	   * var numbers = [1, 2, 3, 4, 5];
	   *
	   * var objects = [{ foo: true }, { foo: false, bar: true }];
	   *
	   * Lazy(numbers).every(isEven)     // => false
	   * Lazy(numbers).every(isPositive) // => true
	   * Lazy(objects).all('foo')        // => false
	   * Lazy(objects).all('bar')        // => false
	   */
	  Sequence.prototype.every = function every(predicate) {
	    predicate = createCallback(predicate);

	    return this.each(function(e, i) {
	      return !!predicate(e, i);
	    });
	  };

	  Sequence.prototype.all = function all(predicate) {
	    return this.every(predicate);
	  };

	  /**
	   * Checks whether at least one element in this sequence satisfies a given
	   * predicate (or, if no predicate is specified, whether the sequence contains at
	   * least one element).
	   *
	   * @public
	   * @aka any
	   * @param {Function=} predicate A function to call on (potentially) every element
	   *     in this sequence.
	   * @returns {boolean} True if `predicate` returns true for at least one element
	   *     in the sequence. False if `predicate` returns false for every element (or
	   *     the sequence is empty).
	   *
	   * @examples
	   * var numbers = [1, 2, 3, 4, 5];
	   *
	   * Lazy(numbers).some()           // => true
	   * Lazy(numbers).some(isEven)     // => true
	   * Lazy(numbers).some(isNegative) // => false
	   * Lazy([]).some()                // => false
	   */
	  Sequence.prototype.some = function some(predicate) {
	    predicate = createCallback(predicate, true);

	    var success = false;
	    this.each(function(e) {
	      if (predicate(e)) {
	        success = true;
	        return false;
	      }
	    });
	    return success;
	  };

	  Sequence.prototype.any = function any(predicate) {
	    return this.some(predicate);
	  };

	  /**
	   * Checks whether NO elements in this sequence satisfy the given predicate
	   * (the opposite of {@link Sequence#all}, basically).
	   *
	   * @public
	   * @param {Function=} predicate A function to call on (potentially) every element
	   *     in this sequence.
	   * @returns {boolean} True if `predicate` does not return true for any element
	   *     in the sequence. False if `predicate` returns true for at least one
	   *     element.
	   *
	   * @examples
	   * var numbers = [1, 2, 3, 4, 5];
	   *
	   * Lazy(numbers).none()           // => false
	   * Lazy(numbers).none(isEven)     // => false
	   * Lazy(numbers).none(isNegative) // => true
	   * Lazy([]).none(isEven)          // => true
	   * Lazy([]).none(isNegative)      // => true
	   * Lazy([]).none()                // => true
	   */
	  Sequence.prototype.none = function none(predicate) {
	    return !this.any(predicate);
	  };

	  /**
	   * Checks whether the sequence has no elements.
	   *
	   * @public
	   * @returns {boolean} True if the sequence is empty, false if it contains at
	   *     least one element.
	   *
	   * @examples
	   * Lazy([]).isEmpty()        // => true
	   * Lazy([1, 2, 3]).isEmpty() // => false
	   */
	  Sequence.prototype.isEmpty = function isEmpty() {
	    return !this.any();
	  };

	  /**
	   * Performs (at worst) a linear search from the head of this sequence,
	   * returning the first index at which the specified value is found.
	   *
	   * @public
	   * @param {*} value The element to search for in the sequence.
	   * @returns {number} The index within this sequence where the given value is
	   *     located, or -1 if the sequence doesn't contain the value.
	   *
	   * @examples
	   * function reciprocal(x) { return 1 / x; }
	   *
	   * Lazy(["foo", "bar", "baz"]).indexOf("bar")   // => 1
	   * Lazy([1, 2, 3]).indexOf(4)                   // => -1
	   * Lazy([1, 2, 3]).map(reciprocal).indexOf(0.5) // => 1
	   */
	  Sequence.prototype.indexOf = function indexOf(value) {
	    var foundIndex = -1;
	    this.each(function(e, i) {
	      if (e === value) {
	        foundIndex = i;
	        return false;
	      }
	    });
	    return foundIndex;
	  };

	  /**
	   * Performs (at worst) a linear search from the tail of this sequence,
	   * returning the last index at which the specified value is found.
	   *
	   * @public
	   * @param {*} value The element to search for in the sequence.
	   * @returns {number} The last index within this sequence where the given value
	   *     is located, or -1 if the sequence doesn't contain the value.
	   *
	   * @examples
	   * Lazy(["a", "b", "c", "b", "a"]).lastIndexOf("b")    // => 3
	   * Lazy([1, 2, 3]).lastIndexOf(0)                      // => -1
	   * Lazy([2, 2, 1, 2, 4]).filter(isEven).lastIndexOf(2) // 2
	   */
	  Sequence.prototype.lastIndexOf = function lastIndexOf(value) {
	    var reversed = this.getIndex().reverse(),
	        index    = reversed.indexOf(value);
	    if (index !== -1) {
	      index = reversed.length() - index - 1;
	    }
	    return index;
	  };

	  /**
	   * Performs a binary search of this sequence, returning the lowest index where
	   * the given value is either found, or where it belongs (if it is not already
	   * in the sequence).
	   *
	   * This method assumes the sequence is in sorted order and will fail otherwise.
	   *
	   * @public
	   * @param {*} value The element to search for in the sequence.
	   * @returns {number} An index within this sequence where the given value is
	   *     located, or where it belongs in sorted order.
	   *
	   * @examples
	   * Lazy([1, 3, 6, 9]).sortedIndex(3)                    // => 1
	   * Lazy([1, 3, 6, 9]).sortedIndex(7)                    // => 3
	   * Lazy([5, 10, 15, 20]).filter(isEven).sortedIndex(10) // => 0
	   * Lazy([5, 10, 15, 20]).filter(isEven).sortedIndex(12) // => 1
	   */
	  Sequence.prototype.sortedIndex = function sortedIndex(value) {
	    var indexed = this.getIndex(),
	        lower   = 0,
	        upper   = indexed.length(),
	        i;

	    while (lower < upper) {
	      i = (lower + upper) >>> 1;
	      if (compare(indexed.get(i), value) === -1) {
	        lower = i + 1;
	      } else {
	        upper = i;
	      }
	    }
	    return lower;
	  };

	  /**
	   * Checks whether the given value is in this sequence.
	   *
	   * @public
	   * @param {*} value The element to search for in the sequence.
	   * @returns {boolean} True if the sequence contains the value, false if not.
	   *
	   * @examples
	   * var numbers = [5, 10, 15, 20];
	   *
	   * Lazy(numbers).contains(15) // => true
	   * Lazy(numbers).contains(13) // => false
	   */
	  Sequence.prototype.contains = function contains(value) {
	    return this.indexOf(value) !== -1;
	  };

	  /**
	   * Aggregates a sequence into a single value according to some accumulator
	   * function.
	   *
	   * For an asynchronous sequence, instead of immediately returning a result
	   * (which it can't, obviously), this method returns an {@link AsyncHandle}
	   * whose `onComplete` method can be called to supply a callback to handle the
	   * final result once iteration has completed.
	   *
	   * @public
	   * @aka inject, foldl
	   * @param {Function} aggregator The function through which to pass every element
	   *     in the sequence. For every element, the function will be passed the total
	   *     aggregated result thus far and the element itself, and should return a
	   *     new aggregated result.
	   * @param {*=} memo The starting value to use for the aggregated result
	   *     (defaults to the first element in the sequence).
	   * @returns {*} The result of the aggregation, or, for asynchronous sequences,
	   *     an {@link AsyncHandle} whose `onComplete` method accepts a callback to
	   *     handle the final result.
	   *
	   * @examples
	   * function multiply(x, y) { return x * y; }
	   *
	   * var numbers = [1, 2, 3, 4];
	   *
	   * Lazy(numbers).reduce(multiply)    // => 24
	   * Lazy(numbers).reduce(multiply, 5) // => 120
	   */
	  Sequence.prototype.reduce = function reduce(aggregator, memo) {
	    if (arguments.length < 2) {
	      return this.tail().reduce(aggregator, this.head());
	    }

	    var eachResult = this.each(function(e, i) {
	      memo = aggregator(memo, e, i);
	    });

	    // TODO: Think of a way more efficient solution to this problem.
	    if (eachResult instanceof AsyncHandle) {
	      return eachResult.then(function() { return memo; });
	    }

	    return memo;
	  };

	  Sequence.prototype.inject =
	  Sequence.prototype.foldl = function foldl(aggregator, memo) {
	    return this.reduce(aggregator, memo);
	  };

	  /**
	   * Aggregates a sequence, from the tail, into a single value according to some
	   * accumulator function.
	   *
	   * @public
	   * @aka foldr
	   * @param {Function} aggregator The function through which to pass every element
	   *     in the sequence. For every element, the function will be passed the total
	   *     aggregated result thus far and the element itself, and should return a
	   *     new aggregated result.
	   * @param {*} memo The starting value to use for the aggregated result.
	   * @returns {*} The result of the aggregation.
	   *
	   * @examples
	   * function append(s1, s2) {
	   *   return s1 + s2;
	   * }
	   *
	   * function isVowel(str) {
	   *   return "aeiou".indexOf(str) !== -1;
	   * }
	   *
	   * Lazy("abcde").reduceRight(append)                 // => "edcba"
	   * Lazy("abcde").filter(isVowel).reduceRight(append) // => "ea"
	   */
	  Sequence.prototype.reduceRight = function reduceRight(aggregator, memo) {
	    if (arguments.length < 2) {
	      return this.initial(1).reduceRight(aggregator, this.last());
	    }

	    // This bothers me... but frankly, calling reverse().reduce() is potentially
	    // going to eagerly evaluate the sequence anyway; so it's really not an issue.
	    var indexed = this.getIndex(),
	        i = indexed.length() - 1;
	    return indexed.reverse().reduce(function(m, e) {
	      return aggregator(m, e, i--);
	    }, memo);
	  };

	  Sequence.prototype.foldr = function foldr(aggregator, memo) {
	    return this.reduceRight(aggregator, memo);
	  };

	  /**
	   * Groups this sequence into consecutive (overlapping) segments of a specified
	   * length. If the underlying sequence has fewer elements than the specfied
	   * length, then this sequence will be empty.
	   *
	   * @public
	   * @param {number} length The length of each consecutive segment.
	   * @returns {Sequence} The resulting sequence of consecutive segments.
	   *
	   * @examples
	   * Lazy([]).consecutive(2)        // => sequence: []
	   * Lazy([1]).consecutive(2)       // => sequence: []
	   * Lazy([1, 2]).consecutive(2)    // => sequence: [[1, 2]]
	   * Lazy([1, 2, 3]).consecutive(2) // => sequence: [[1, 2], [2, 3]]
	   * Lazy([1, 2, 3]).consecutive(0) // => sequence: [[]]
	   * Lazy([1, 2, 3]).consecutive(1) // => sequence: [[1], [2], [3]]
	   */
	  Sequence.prototype.consecutive = function consecutive(count) {
	    var queue    = new Queue(count);
	    var segments = this.map(function(element) {
	      if (queue.add(element).count === count) {
	        return queue.toArray();
	      }
	    });
	    return segments.compact();
	  };

	  /**
	   * Breaks this sequence into chunks (arrays) of a specified length.
	   *
	   * @public
	   * @param {number} size The size of each chunk.
	   * @returns {Sequence} The resulting sequence of chunks.
	   *
	   * @examples
	   * Lazy([]).chunk(2)        // sequence: []
	   * Lazy([1, 2, 3]).chunk(2) // sequence: [[1, 2], [3]]
	   * Lazy([1, 2, 3]).chunk(1) // sequence: [[1], [2], [3]]
	   * Lazy([1, 2, 3]).chunk(4) // sequence: [[1, 2, 3]]
	   * Lazy([1, 2, 3]).chunk(0) // throws
	   */
	  Sequence.prototype.chunk = function chunk(size) {
	    if (size < 1) {
	      throw new Error("You must specify a positive chunk size.");
	    }

	    return new ChunkedSequence(this, size);
	  };

	  /**
	   * @constructor
	   */
	  function ChunkedSequence(parent, size) {
	    this.parent    = parent;
	    this.chunkSize = size;
	  }

	  ChunkedSequence.prototype = new Sequence();

	  ChunkedSequence.prototype.getIterator = function getIterator() {
	    return new ChunkedIterator(this.parent, this.chunkSize);
	  };

	  /**
	   * @constructor
	   */
	  function ChunkedIterator(sequence, size) {
	    this.iterator = sequence.getIterator();
	    this.size     = size;
	  }

	  ChunkedIterator.prototype.current = function current() {
	    return this.currentChunk;
	  };

	  ChunkedIterator.prototype.moveNext = function moveNext() {
	    var iterator  = this.iterator,
	        chunkSize = this.size,
	        chunk     = [];

	    while (chunk.length < chunkSize && iterator.moveNext()) {
	      chunk.push(iterator.current());
	    }

	    if (chunk.length === 0) {
	      return false;
	    }

	    this.currentChunk = chunk;
	    return true;
	  };

	  /**
	   * Passes each element in the sequence to the specified callback during
	   * iteration. This is like {@link Sequence#each}, except that it can be
	   * inserted anywhere in the middle of a chain of methods to "intercept" the
	   * values in the sequence at that point.
	   *
	   * @public
	   * @param {Function} callback A function to call on every element in the
	   *     sequence during iteration. The return value of this function does not
	   *     matter.
	   * @returns {Sequence} A sequence comprising the same elements as this one.
	   *
	   * @examples
	   * Lazy([1, 2, 3]).tap(fn).each(Lazy.noop); // calls fn 3 times
	   */
	  Sequence.prototype.tap = function tap(callback) {
	    return new TappedSequence(this, callback);
	  };

	  /**
	   * @constructor
	   */
	  function TappedSequence(parent, callback) {
	    this.parent = parent;
	    this.callback = callback;
	  }

	  TappedSequence.prototype = new Sequence();

	  TappedSequence.prototype.each = function each(fn) {
	    var callback = this.callback;
	    return this.parent.each(function(e, i) {
	      callback(e, i);
	      return fn(e, i);
	    });
	  };

	  /**
	   * Seaches for the first element in the sequence satisfying a given predicate.
	   *
	   * @public
	   * @aka detect
	   * @param {Function} predicate A function to call on (potentially) every element
	   *     in the sequence.
	   * @returns {*} The first element in the sequence for which `predicate` returns
	   *     `true`, or `undefined` if no such element is found.
	   *
	   * @examples
	   * function divisibleBy3(x) {
	   *   return x % 3 === 0;
	   * }
	   *
	   * var numbers = [5, 6, 7, 8, 9, 10];
	   *
	   * Lazy(numbers).find(divisibleBy3) // => 6
	   * Lazy(numbers).find(isNegative)   // => undefined
	   */
	  Sequence.prototype.find = function find(predicate) {
	    return this.filter(predicate).first();
	  };

	  Sequence.prototype.detect = function detect(predicate) {
	    return this.find(predicate);
	  };

	  /**
	   * Gets the minimum value in the sequence.
	   *
	   * @public
	   * @param {Function=} valueFn The function by which the value for comparison is
	   *     calculated for each element in the sequence.
	   * @returns {*} The element with the lowest value in the sequence, or
	   *     `Infinity` if the sequence is empty.
	   *
	   * @examples
	   * function negate(x) { return x * -1; }
	   *
	   * Lazy([]).min()                       // => Infinity
	   * Lazy([6, 18, 2, 49, 34]).min()       // => 2
	   * Lazy([6, 18, 2, 49, 34]).min(negate) // => 49
	   */
	  Sequence.prototype.min = function min(valueFn) {
	    if (typeof valueFn !== "undefined") {
	      return this.minBy(valueFn);
	    }

	    return this.reduce(function(x, y) { return y < x ? y : x; }, Infinity);
	  };

	  Sequence.prototype.minBy = function minBy(valueFn) {
	    valueFn = createCallback(valueFn);
	    return this.reduce(function(x, y) { return valueFn(y) < valueFn(x) ? y : x; });
	  };

	  /**
	   * Gets the maximum value in the sequence.
	   *
	   * @public
	   * @param {Function=} valueFn The function by which the value for comparison is
	   *     calculated for each element in the sequence.
	   * @returns {*} The element with the highest value in the sequence, or
	   *     `-Infinity` if the sequence is empty.
	   *
	   * @examples
	   * function reverseDigits(x) {
	   *   return Number(String(x).split('').reverse().join(''));
	   * }
	   *
	   * Lazy([]).max()                              // => -Infinity
	   * Lazy([6, 18, 2, 48, 29]).max()              // => 48
	   * Lazy([6, 18, 2, 48, 29]).max(reverseDigits) // => 29
	   */
	  Sequence.prototype.max = function max(valueFn) {
	    if (typeof valueFn !== "undefined") {
	      return this.maxBy(valueFn);
	    }

	    return this.reduce(function(x, y) { return y > x ? y : x; }, -Infinity);
	  };

	  Sequence.prototype.maxBy = function maxBy(valueFn) {
	    valueFn = createCallback(valueFn);
	    return this.reduce(function(x, y) { return valueFn(y) > valueFn(x) ? y : x; });
	  };

	  /**
	   * Gets the sum of the values in the sequence.
	   *
	   * @public
	   * @param {Function=} valueFn The function used to select the values that will
	   *     be summed up.
	   * @returns {*} The sum.
	   *
	   * @examples
	   * Lazy([]).sum()                     // => 0
	   * Lazy([1, 2, 3, 4]).sum()           // => 10
	   * Lazy([1.2, 3.4]).sum(Math.floor)   // => 4
	   * Lazy(['foo', 'bar']).sum('length') // => 6
	   */
	  Sequence.prototype.sum = function sum(valueFn) {
	    if (typeof valueFn !== "undefined") {
	      return this.sumBy(valueFn);
	    }

	    return this.reduce(function(x, y) { return x + y; }, 0);
	  };

	  Sequence.prototype.sumBy = function sumBy(valueFn) {
	    valueFn = createCallback(valueFn);
	    return this.reduce(function(x, y) { return x + valueFn(y); }, 0);
	  };

	  /**
	   * Creates a string from joining together all of the elements in this sequence,
	   * separated by the given delimiter.
	   *
	   * @public
	   * @aka toString
	   * @param {string=} delimiter The separator to insert between every element from
	   *     this sequence in the resulting string (defaults to `","`).
	   * @returns {string} The delimited string.
	   *
	   * @examples
	   * Lazy([6, 29, 1984]).join("/")  // => "6/29/1984"
	   * Lazy(["a", "b", "c"]).join()   // => "a,b,c"
	   * Lazy(["a", "b", "c"]).join("") // => "abc"
	   * Lazy([1, 2, 3]).join()         // => "1,2,3"
	   * Lazy([1, 2, 3]).join("")       // => "123"
	   * Lazy(["", "", ""]).join(",")   // => ",,"
	   */
	  Sequence.prototype.join = function join(delimiter) {
	    delimiter = typeof delimiter === "string" ? delimiter : ",";

	    return this.reduce(function(str, e, i) {
	      if (i > 0) {
	        str += delimiter;
	      }
	      return str + e;
	    }, "");
	  };

	  Sequence.prototype.toString = function toString(delimiter) {
	    return this.join(delimiter);
	  };

	  /**
	   * Creates a sequence, with the same elements as this one, that will be iterated
	   * over asynchronously when calling `each`.
	   *
	   * @public
	   * @param {number=} interval The approximate period, in milliseconds, that
	   *     should elapse between each element in the resulting sequence. Omitting
	   *     this argument will result in the fastest possible asynchronous iteration.
	   * @returns {AsyncSequence} The new asynchronous sequence.
	   *
	   * @examples
	   * Lazy([1, 2, 3]).async(100).each(fn) // calls fn 3 times asynchronously
	   */
	  Sequence.prototype.async = function async(interval) {
	    return new AsyncSequence(this, interval);
	  };

	  /**
	   * @constructor
	   */
	  function SimpleIntersectionSequence(parent, array) {
	    this.parent = parent;
	    this.array  = array;
	    this.each   = getEachForIntersection(array);
	  }

	  SimpleIntersectionSequence.prototype = new Sequence();

	  SimpleIntersectionSequence.prototype.eachMemoizerCache = function eachMemoizerCache(fn) {
	    var iterator = new UniqueMemoizer(Lazy(this.array).getIterator()),
	        i = 0;

	    return this.parent.each(function(e) {
	      if (iterator.contains(e)) {
	        return fn(e, i++);
	      }
	    });
	  };

	  SimpleIntersectionSequence.prototype.eachArrayCache = function eachArrayCache(fn) {
	    var array = this.array,
	        find  = arrayContains,
	        i = 0;

	    return this.parent.each(function(e) {
	      if (find(array, e)) {
	        return fn(e, i++);
	      }
	    });
	  };

	  function getEachForIntersection(source) {
	    if (source.length < 40) {
	      return SimpleIntersectionSequence.prototype.eachArrayCache;
	    } else {
	      return SimpleIntersectionSequence.prototype.eachMemoizerCache;
	    }
	  }

	  /**
	   * An optimized version of {@link ZippedSequence}, when zipping a sequence with
	   * only one array.
	   *
	   * @param {Sequence} parent The underlying sequence.
	   * @param {Array} array The array with which to zip the sequence.
	   * @constructor
	   */
	  function SimpleZippedSequence(parent, array) {
	    this.parent = parent;
	    this.array  = array;
	  }

	  SimpleZippedSequence.prototype = new Sequence();

	  SimpleZippedSequence.prototype.each = function each(fn) {
	    var array = this.array;
	    return this.parent.each(function(e, i) {
	      return fn([e, array[i]], i);
	    });
	  };

	  /**
	   * An `ArrayLikeSequence` is a {@link Sequence} that provides random access to
	   * its elements. This extends the API for iterating with the additional methods
	   * {@link #get} and {@link #length}, allowing a sequence to act as a "view" into
	   * a collection or other indexed data source.
	   *
	   * The initial sequence created by wrapping an array with `Lazy(array)` is an
	   * `ArrayLikeSequence`.
	   *
	   * All methods of `ArrayLikeSequence` that conceptually should return
	   * something like a array (with indexed access) return another
	   * `ArrayLikeSequence`, for example:
	   *
	   * - {@link Sequence#map}
	   * - {@link ArrayLikeSequence#slice}
	   * - {@link Sequence#take} and {@link Sequence#drop}
	   * - {@link Sequence#reverse}
	   *
	   * The above is not an exhaustive list. There are also certain other cases
	   * where it might be possible to return an `ArrayLikeSequence` (e.g., calling
	   * {@link Sequence#concat} with a single array argument), but this is not
	   * guaranteed by the API.
	   *
	   * Note that in many cases, it is not possible to provide indexed access
	   * without first performing at least a partial iteration of the underlying
	   * sequence. In these cases an `ArrayLikeSequence` will not be returned:
	   *
	   * - {@link Sequence#filter}
	   * - {@link Sequence#uniq}
	   * - {@link Sequence#union}
	   * - {@link Sequence#intersect}
	   *
	   * etc. The above methods only return ordinary {@link Sequence} objects.
	   *
	   * Defining custom array-like sequences
	   * ------------------------------------
	   *
	   * Creating a custom `ArrayLikeSequence` is essentially the same as creating a
	   * custom {@link Sequence}. You just have a couple more methods you need to
	   * implement: `get` and (optionally) `length`.
	   *
	   * Here's an example. Let's define a sequence type called `OffsetSequence` that
	   * offsets each of its parent's elements by a set distance, and circles back to
	   * the beginning after reaching the end. **Remember**: the initialization
	   * function you pass to {@link #define} should always accept a `parent` as its
	   * first parameter.
	   *
	   *     ArrayLikeSequence.define("offset", {
	   *       init: function(parent, offset) {
	   *         this.offset = offset;
	   *       },
	   *
	   *       get: function(i) {
	   *         return this.parent.get((i + this.offset) % this.parent.length());
	   *       }
	   *     });
	   *
	   * It's worth noting a couple of things here.
	   *
	   * First, Lazy's default implementation of `length` simply returns the parent's
	   * length. In this case, since an `OffsetSequence` will always have the same
	   * number of elements as its parent, that implementation is fine; so we don't
	   * need to override it.
	   *
	   * Second, the default implementation of `each` uses `get` and `length` to
	   * essentially create a `for` loop, which is fine here. If you want to implement
	   * `each` your own way, you can do that; but in most cases (as here), you can
	   * probably just stick with the default.
	   *
	   * So we're already done, after only implementing `get`! Pretty easy, huh?
	   *
	   * Now the `offset` method will be chainable from any `ArrayLikeSequence`. So
	   * for example:
	   *
	   *     Lazy([1, 2, 3]).map(mapFn).offset(3);
	   *
	   * ...will work, but:
	   *
	   *     Lazy([1, 2, 3]).filter(mapFn).offset(3);
	   *
	   * ...will not (because `filter` does not return an `ArrayLikeSequence`).
	   *
	   * (Also, as with the example provided for defining custom {@link Sequence}
	   * types, this example really could have been implemented using a function
	   * already available as part of Lazy.js: in this case, {@link Sequence#map}.)
	   *
	   * @public
	   * @constructor
	   *
	   * @examples
	   * Lazy([1, 2, 3])                    // instanceof Lazy.ArrayLikeSequence
	   * Lazy([1, 2, 3]).map(Lazy.identity) // instanceof Lazy.ArrayLikeSequence
	   * Lazy([1, 2, 3]).take(2)            // instanceof Lazy.ArrayLikeSequence
	   * Lazy([1, 2, 3]).drop(2)            // instanceof Lazy.ArrayLikeSequence
	   * Lazy([1, 2, 3]).reverse()          // instanceof Lazy.ArrayLikeSequence
	   * Lazy([1, 2, 3]).slice(1, 2)        // instanceof Lazy.ArrayLikeSequence
	   */
	  function ArrayLikeSequence() {}

	  ArrayLikeSequence.prototype = new Sequence();

	  /**
	   * Create a new constructor function for a type inheriting from
	   * `ArrayLikeSequence`.
	   *
	   * @public
	   * @param {string|Array.<string>} methodName The name(s) of the method(s) to be
	   *     used for constructing the new sequence. The method will be attached to
	   *     the `ArrayLikeSequence` prototype so that it can be chained with any other
	   *     methods that return array-like sequences.
	   * @param {Object} overrides An object containing function overrides for this
	   *     new sequence type. **Must** include `get`. *May* include `init`,
	   *     `length`, `getIterator`, and `each`. For each function, `this` will be
	   *     the new sequence and `this.parent` will be the source sequence.
	   * @returns {Function} A constructor for a new type inheriting from
	   *     `ArrayLikeSequence`.
	   *
	   * @examples
	   * Lazy.ArrayLikeSequence.define("offset", {
	   *   init: function(offset) {
	   *     this.offset = offset;
	   *   },
	   *
	   *   get: function(i) {
	   *     return this.parent.get((i + this.offset) % this.parent.length());
	   *   }
	   * });
	   *
	   * Lazy([1, 2, 3]).offset(1) // sequence: [2, 3, 1]
	   */
	  ArrayLikeSequence.define = function define(methodName, overrides) {
	    if (!overrides || typeof overrides.get !== 'function') {
	      throw new Error("A custom array-like sequence must implement *at least* get!");
	    }

	    return defineSequenceType(ArrayLikeSequence, methodName, overrides);
	  };

	  /**
	   * Returns the element at the specified index.
	   *
	   * @public
	   * @param {number} i The index to access.
	   * @returns {*} The element.
	   *
	   * @examples
	   * function increment(x) { return x + 1; }
	   *
	   * Lazy([1, 2, 3]).get(1)                // => 2
	   * Lazy([1, 2, 3]).get(-1)               // => undefined
	   * Lazy([1, 2, 3]).map(increment).get(1) // => 3
	   */
	  ArrayLikeSequence.prototype.get = function get(i) {
	    return this.parent.get(i);
	  };

	  /**
	   * Returns the length of the sequence.
	   *
	   * @public
	   * @returns {number} The length.
	   *
	   * @examples
	   * function increment(x) { return x + 1; }
	   *
	   * Lazy([]).length()                       // => 0
	   * Lazy([1, 2, 3]).length()                // => 3
	   * Lazy([1, 2, 3]).map(increment).length() // => 3
	   */
	  ArrayLikeSequence.prototype.length = function length() {
	    return this.parent.length();
	  };

	  /**
	   * Returns the current sequence (since it is already indexed).
	   */
	  ArrayLikeSequence.prototype.getIndex = function getIndex() {
	    return this;
	  };

	  /**
	   * An optimized version of {@link Sequence#getIterator}.
	   */
	  ArrayLikeSequence.prototype.getIterator = function getIterator() {
	    return new IndexedIterator(this);
	  };

	  /**
	   * An optimized version of {@link Iterator} meant to work with already-indexed
	   * sequences.
	   *
	   * @param {ArrayLikeSequence} sequence The sequence to iterate over.
	   * @constructor
	   */
	  function IndexedIterator(sequence) {
	    this.sequence = sequence;
	    this.index    = -1;
	  }

	  IndexedIterator.prototype.current = function current() {
	    return this.sequence.get(this.index);
	  };

	  IndexedIterator.prototype.moveNext = function moveNext() {
	    if (this.index >= this.sequence.length() - 1) {
	      return false;
	    }

	    ++this.index;
	    return true;
	  };

	  /**
	   * An optimized version of {@link Sequence#each}.
	   */
	  ArrayLikeSequence.prototype.each = function each(fn) {
	    var length = this.length(),
	        i = -1;

	    while (++i < length) {
	      if (fn(this.get(i), i) === false) {
	        return false;
	      }
	    }

	    return true;
	  };

	  /**
	   * Returns a new sequence with the same elements as this one, minus the last
	   * element.
	   *
	   * @public
	   * @returns {ArrayLikeSequence} The new array-like sequence.
	   *
	   * @examples
	   * Lazy([1, 2, 3]).pop() // sequence: [1, 2]
	   * Lazy([]).pop()        // sequence: []
	   */
	  ArrayLikeSequence.prototype.pop = function pop() {
	    return this.initial();
	  };

	  /**
	   * Returns a new sequence with the same elements as this one, minus the first
	   * element.
	   *
	   * @public
	   * @returns {ArrayLikeSequence} The new array-like sequence.
	   *
	   * @examples
	   * Lazy([1, 2, 3]).shift() // sequence: [2, 3]
	   * Lazy([]).shift()        // sequence: []
	   */
	  ArrayLikeSequence.prototype.shift = function shift() {
	    return this.drop();
	  };

	  /**
	   * Returns a new sequence comprising the portion of this sequence starting
	   * from the specified starting index and continuing until the specified ending
	   * index or to the end of the sequence.
	   *
	   * @public
	   * @param {number} begin The index at which the new sequence should start.
	   * @param {number=} end The index at which the new sequence should end.
	   * @returns {ArrayLikeSequence} The new array-like sequence.
	   *
	   * @examples
	   * Lazy([1, 2, 3, 4, 5]).slice(0)     // sequence: [1, 2, 3, 4, 5]
	   * Lazy([1, 2, 3, 4, 5]).slice(2)     // sequence: [3, 4, 5]
	   * Lazy([1, 2, 3, 4, 5]).slice(2, 4)  // sequence: [3, 4]
	   * Lazy([1, 2, 3, 4, 5]).slice(-1)    // sequence: [5]
	   * Lazy([1, 2, 3, 4, 5]).slice(1, -1) // sequence: [2, 3, 4]
	   * Lazy([1, 2, 3, 4, 5]).slice(0, 10) // sequence: [1, 2, 3, 4, 5]
	   */
	  ArrayLikeSequence.prototype.slice = function slice(begin, end) {
	    var length = this.length();

	    if (begin < 0) {
	      begin = length + begin;
	    }

	    var result = this.drop(begin);

	    if (typeof end === "number") {
	      if (end < 0) {
	        end = length + end;
	      }
	      result = result.take(end - begin);
	    }

	    return result;
	  };

	  /**
	   * An optimized version of {@link Sequence#map}, which creates an
	   * {@link ArrayLikeSequence} so that the result still provides random access.
	   *
	   * @public
	   *
	   * @examples
	   * Lazy([1, 2, 3]).map(Lazy.identity) // instanceof Lazy.ArrayLikeSequence
	   */
	  ArrayLikeSequence.prototype.map = function map(mapFn) {
	    return new IndexedMappedSequence(this, createCallback(mapFn));
	  };

	  /**
	   * @constructor
	   */
	  function IndexedMappedSequence(parent, mapFn) {
	    this.parent = parent;
	    this.mapFn  = mapFn;
	  }

	  IndexedMappedSequence.prototype = new ArrayLikeSequence();

	  IndexedMappedSequence.prototype.get = function get(i) {
	    if (i < 0 || i >= this.parent.length()) {
	      return undefined;
	    }

	    return this.mapFn(this.parent.get(i), i);
	  };

	  /**
	   * An optimized version of {@link Sequence#filter}.
	   */
	  ArrayLikeSequence.prototype.filter = function filter(filterFn) {
	    return new IndexedFilteredSequence(this, createCallback(filterFn));
	  };

	  /**
	   * @constructor
	   */
	  function IndexedFilteredSequence(parent, filterFn) {
	    this.parent   = parent;
	    this.filterFn = filterFn;
	  }

	  IndexedFilteredSequence.prototype = new FilteredSequence();

	  IndexedFilteredSequence.prototype.each = function each(fn) {
	    var parent = this.parent,
	        filterFn = this.filterFn,
	        length = this.parent.length(),
	        i = -1,
	        j = 0,
	        e;

	    while (++i < length) {
	      e = parent.get(i);
	      if (filterFn(e, i) && fn(e, j++) === false) {
	        return false;
	      }
	    }

	    return true;
	  };

	  /**
	   * An optimized version of {@link Sequence#reverse}, which creates an
	   * {@link ArrayLikeSequence} so that the result still provides random access.
	   *
	   * @public
	   *
	   * @examples
	   * Lazy([1, 2, 3]).reverse() // instanceof Lazy.ArrayLikeSequence
	   */
	  ArrayLikeSequence.prototype.reverse = function reverse() {
	    return new IndexedReversedSequence(this);
	  };

	  /**
	   * @constructor
	   */
	  function IndexedReversedSequence(parent) {
	    this.parent = parent;
	  }

	  IndexedReversedSequence.prototype = new ArrayLikeSequence();

	  IndexedReversedSequence.prototype.get = function get(i) {
	    return this.parent.get(this.length() - i - 1);
	  };

	  /**
	   * An optimized version of {@link Sequence#first}, which creates an
	   * {@link ArrayLikeSequence} so that the result still provides random access.
	   *
	   * @public
	   *
	   * @examples
	   * Lazy([1, 2, 3]).first(2) // instanceof Lazy.ArrayLikeSequence
	   */
	  ArrayLikeSequence.prototype.first = function first(count) {
	    if (typeof count === "undefined") {
	      return this.get(0);
	    }

	    return new IndexedTakeSequence(this, count);
	  };

	  /**
	   * @constructor
	   */
	  function IndexedTakeSequence(parent, count) {
	    this.parent = parent;
	    this.count  = count;
	  }

	  IndexedTakeSequence.prototype = new ArrayLikeSequence();

	  IndexedTakeSequence.prototype.length = function length() {
	    var parentLength = this.parent.length();
	    return this.count <= parentLength ? this.count : parentLength;
	  };

	  /**
	   * An optimized version of {@link Sequence#rest}, which creates an
	   * {@link ArrayLikeSequence} so that the result still provides random access.
	   *
	   * @public
	   *
	   * @examples
	   * Lazy([1, 2, 3]).rest() // instanceof Lazy.ArrayLikeSequence
	   */
	  ArrayLikeSequence.prototype.rest = function rest(count) {
	    return new IndexedDropSequence(this, count);
	  };

	  /**
	   * @constructor
	   */
	  function IndexedDropSequence(parent, count) {
	    this.parent = parent;
	    this.count  = typeof count === "number" ? count : 1;
	  }

	  IndexedDropSequence.prototype = new ArrayLikeSequence();

	  IndexedDropSequence.prototype.get = function get(i) {
	    return this.parent.get(this.count + i);
	  };

	  IndexedDropSequence.prototype.length = function length() {
	    var parentLength = this.parent.length();
	    return this.count <= parentLength ? parentLength - this.count : 0;
	  };

	  /**
	   * An optimized version of {@link Sequence#concat} that returns another
	   * {@link ArrayLikeSequence} *if* the argument is an array.
	   *
	   * @public
	   * @param {...*} var_args
	   *
	   * @examples
	   * Lazy([1, 2]).concat([3, 4]) // instanceof Lazy.ArrayLikeSequence
	   * Lazy([1, 2]).concat([3, 4]) // sequence: [1, 2, 3, 4]
	   */
	  ArrayLikeSequence.prototype.concat = function concat(var_args) {
	    if (arguments.length === 1 && arguments[0] instanceof Array) {
	      return new IndexedConcatenatedSequence(this, (/** @type {Array} */ var_args));
	    } else {
	      return Sequence.prototype.concat.apply(this, arguments);
	    }
	  };

	  /**
	   * @constructor
	   */
	  function IndexedConcatenatedSequence(parent, other) {
	    this.parent = parent;
	    this.other  = other;
	  }

	  IndexedConcatenatedSequence.prototype = new ArrayLikeSequence();

	  IndexedConcatenatedSequence.prototype.get = function get(i) {
	    var parentLength = this.parent.length();
	    if (i < parentLength) {
	      return this.parent.get(i);
	    } else {
	      return this.other[i - parentLength];
	    }
	  };

	  IndexedConcatenatedSequence.prototype.length = function length() {
	    return this.parent.length() + this.other.length;
	  };

	  /**
	   * An optimized version of {@link Sequence#uniq}.
	   */
	  ArrayLikeSequence.prototype.uniq = function uniq(keyFn) {
	    return new IndexedUniqueSequence(this, createCallback(keyFn));
	  };

	  /**
	   * @param {ArrayLikeSequence} parent
	   * @constructor
	   */
	  function IndexedUniqueSequence(parent, keyFn) {
	    this.parent = parent;
	    this.each   = getEachForParent(parent);
	    this.keyFn  = keyFn;
	  }

	  IndexedUniqueSequence.prototype = new Sequence();

	  IndexedUniqueSequence.prototype.eachArrayCache = function eachArrayCache(fn) {
	    // Basically the same implementation as w/ the set, but using an array because
	    // it's cheaper for smaller sequences.
	    var parent = this.parent,
	        keyFn  = this.keyFn,
	        length = parent.length(),
	        cache  = [],
	        find   = arrayContains,
	        key, value,
	        i = -1,
	        j = 0;

	    while (++i < length) {
	      value = parent.get(i);
	      key = keyFn(value);
	      if (!find(cache, key)) {
	        cache.push(key);
	        if (fn(value, j++) === false) {
	          return false;
	        }
	      }
	    }
	  };

	  IndexedUniqueSequence.prototype.eachSetCache = UniqueSequence.prototype.each;

	  function getEachForParent(parent) {
	    if (parent.length() < 100) {
	      return IndexedUniqueSequence.prototype.eachArrayCache;
	    } else {
	      return UniqueSequence.prototype.each;
	    }
	  }

	  // Now that we've fully initialized the ArrayLikeSequence prototype, we can
	  // set the prototype for MemoizedSequence.

	  MemoizedSequence.prototype = new ArrayLikeSequence();

	  MemoizedSequence.prototype.cache = function cache() {
	    return this.cachedResult || (this.cachedResult = this.parent.toArray());
	  };

	  MemoizedSequence.prototype.get = function get(i) {
	    return this.cache()[i];
	  };

	  MemoizedSequence.prototype.length = function length() {
	    return this.cache().length;
	  };

	  MemoizedSequence.prototype.slice = function slice(begin, end) {
	    return this.cache().slice(begin, end);
	  };

	  MemoizedSequence.prototype.toArray = function toArray() {
	    return this.cache().slice(0);
	  };

	  /**
	   * ArrayWrapper is the most basic {@link Sequence}. It directly wraps an array
	   * and implements the same methods as {@link ArrayLikeSequence}, but more
	   * efficiently.
	   *
	   * @constructor
	   */
	  function ArrayWrapper(source) {
	    this.source = source;
	  }

	  ArrayWrapper.prototype = new ArrayLikeSequence();

	  ArrayWrapper.prototype.root = function root() {
	    return this;
	  };

	  ArrayWrapper.prototype.isAsync = function isAsync() {
	    return false;
	  };

	  /**
	   * Returns the element at the specified index in the source array.
	   *
	   * @param {number} i The index to access.
	   * @returns {*} The element.
	   */
	  ArrayWrapper.prototype.get = function get(i) {
	    return this.source[i];
	  };

	  /**
	   * Returns the length of the source array.
	   *
	   * @returns {number} The length.
	   */
	  ArrayWrapper.prototype.length = function length() {
	    return this.source.length;
	  };

	  /**
	   * An optimized version of {@link Sequence#each}.
	   */
	  ArrayWrapper.prototype.each = function each(fn) {
	    return forEach(this.source, fn);
	  };

	  /**
	   * An optimized version of {@link Sequence#map}.
	   */
	  ArrayWrapper.prototype.map = function map(mapFn) {
	    return new MappedArrayWrapper(this, createCallback(mapFn));
	  };

	  /**
	   * An optimized version of {@link Sequence#filter}.
	   */
	  ArrayWrapper.prototype.filter = function filter(filterFn) {
	    return new FilteredArrayWrapper(this, createCallback(filterFn));
	  };

	  /**
	   * An optimized version of {@link Sequence#uniq}.
	   */
	  ArrayWrapper.prototype.uniq = function uniq(keyFn) {
	    return new UniqueArrayWrapper(this, keyFn);
	  };

	  /**
	   * An optimized version of {@link ArrayLikeSequence#concat}.
	   *
	   * @param {...*} var_args
	   */
	  ArrayWrapper.prototype.concat = function concat(var_args) {
	    if (arguments.length === 1 && arguments[0] instanceof Array) {
	      return new ConcatArrayWrapper(this, (/** @type {Array} */ var_args));
	    } else {
	      return ArrayLikeSequence.prototype.concat.apply(this, arguments);
	    }
	  };

	  /**
	   * An optimized version of {@link Sequence#toArray}.
	   */
	  ArrayWrapper.prototype.toArray = function toArray() {
	    return this.source.slice(0);
	  };

	  /**
	   * @constructor
	   */
	  function MappedArrayWrapper(parent, mapFn) {
	    this.parent = parent;
	    this.mapFn  = mapFn;
	  }

	  MappedArrayWrapper.prototype = new ArrayLikeSequence();

	  MappedArrayWrapper.prototype.get = function get(i) {
	    var source = this.parent.source;

	    if (i < 0 || i >= source.length) {
	      return undefined;
	    }

	    return this.mapFn(source[i]);
	  };

	  MappedArrayWrapper.prototype.length = function length() {
	    return this.parent.source.length;
	  };

	  MappedArrayWrapper.prototype.each = function each(fn) {
	    var source = this.parent.source,
	        length = source.length,
	        mapFn  = this.mapFn,
	        i = -1;

	    while (++i < length) {
	      if (fn(mapFn(source[i], i), i) === false) {
	        return false;
	      }
	    }

	    return true;
	  };

	  /**
	   * @constructor
	   */
	  function FilteredArrayWrapper(parent, filterFn) {
	    this.parent   = parent;
	    this.filterFn = filterFn;
	  }

	  FilteredArrayWrapper.prototype = new FilteredSequence();

	  FilteredArrayWrapper.prototype.each = function each(fn) {
	    var source = this.parent.source,
	        filterFn = this.filterFn,
	        length = source.length,
	        i = -1,
	        j = 0,
	        e;

	    while (++i < length) {
	      e = source[i];
	      if (filterFn(e, i) && fn(e, j++) === false) {
	        return false;
	      }
	    }

	    return true;
	  };

	  /**
	   * @constructor
	   */
	  function UniqueArrayWrapper(parent, keyFn) {
	    this.parent = parent;
	    this.each   = getEachForSource(parent.source);
	    this.keyFn  = keyFn;
	  }

	  UniqueArrayWrapper.prototype = new Sequence();

	  UniqueArrayWrapper.prototype.eachNoCache = function eachNoCache(fn) {
	    var source = this.parent.source,
	        keyFn  = this.keyFn,
	        length = source.length,
	        find   = arrayContainsBefore,
	        value,

	        // Yes, this is hideous.
	        // Trying to get performance first, will refactor next!
	        i = -1,
	        k = 0;

	    while (++i < length) {
	      value = source[i];
	      if (!find(source, value, i, keyFn) && fn(value, k++) === false) {
	        return false;
	      }
	    }

	    return true;
	  };

	  UniqueArrayWrapper.prototype.eachArrayCache = function eachArrayCache(fn) {
	    // Basically the same implementation as w/ the set, but using an array because
	    // it's cheaper for smaller sequences.
	    var source = this.parent.source,
	        keyFn  = this.keyFn,
	        length = source.length,
	        cache  = [],
	        find   = arrayContains,
	        key, value,
	        i = -1,
	        j = 0;

	    if (keyFn) {
	      keyFn = createCallback(keyFn);
	      while (++i < length) {
	        value = source[i];
	        key = keyFn(value);
	        if (!find(cache, key)) {
	          cache.push(key);
	          if (fn(value, j++) === false) {
	            return false;
	          }
	        }
	      }

	    } else {
	      while (++i < length) {
	        value = source[i];
	        if (!find(cache, value)) {
	          cache.push(value);
	          if (fn(value, j++) === false) {
	            return false;
	          }
	        }
	      }
	    }

	    return true;
	  };

	  UniqueArrayWrapper.prototype.eachSetCache = UniqueSequence.prototype.each;

	  /**
	   * My latest findings here...
	   *
	   * So I hadn't really given the set-based approach enough credit. The main issue
	   * was that my Set implementation was totally not optimized at all. After pretty
	   * heavily optimizing it (just take a look; it's a monstrosity now!), it now
	   * becomes the fastest option for much smaller values of N.
	   */
	  function getEachForSource(source) {
	    if (source.length < 40) {
	      return UniqueArrayWrapper.prototype.eachNoCache;
	    } else if (source.length < 100) {
	      return UniqueArrayWrapper.prototype.eachArrayCache;
	    } else {
	      return UniqueArrayWrapper.prototype.eachSetCache;
	    }
	  }

	  /**
	   * @constructor
	   */
	  function ConcatArrayWrapper(parent, other) {
	    this.parent = parent;
	    this.other  = other;
	  }

	  ConcatArrayWrapper.prototype = new ArrayLikeSequence();

	  ConcatArrayWrapper.prototype.get = function get(i) {
	    var source = this.parent.source,
	        sourceLength = source.length;

	    if (i < sourceLength) {
	      return source[i];
	    } else {
	      return this.other[i - sourceLength];
	    }
	  };

	  ConcatArrayWrapper.prototype.length = function length() {
	    return this.parent.source.length + this.other.length;
	  };

	  ConcatArrayWrapper.prototype.each = function each(fn) {
	    var source = this.parent.source,
	        sourceLength = source.length,
	        other = this.other,
	        otherLength = other.length,
	        i = 0,
	        j = -1;

	    while (++j < sourceLength) {
	      if (fn(source[j], i++) === false) {
	        return false;
	      }
	    }

	    j = -1;
	    while (++j < otherLength) {
	      if (fn(other[j], i++) === false) {
	        return false;
	      }
	    }

	    return true;
	  };

	  /**
	   * An `ObjectLikeSequence` object represents a sequence of key/value pairs.
	   *
	   * The initial sequence you get by wrapping an object with `Lazy(object)` is
	   * an `ObjectLikeSequence`.
	   *
	   * All methods of `ObjectLikeSequence` that conceptually should return
	   * something like an object return another `ObjectLikeSequence`.
	   *
	   * @public
	   * @constructor
	   *
	   * @examples
	   * var obj = { foo: 'bar' };
	   *
	   * Lazy(obj).assign({ bar: 'baz' })   // instanceof Lazy.ObjectLikeSequence
	   * Lazy(obj).defaults({ bar: 'baz' }) // instanceof Lazy.ObjectLikeSequence
	   * Lazy(obj).invert()                 // instanceof Lazy.ObjectLikeSequence
	   */
	  function ObjectLikeSequence() {}

	  ObjectLikeSequence.prototype = new Sequence();

	  /**
	   * Create a new constructor function for a type inheriting from
	   * `ObjectLikeSequence`.
	   *
	   * @public
	   * @param {string|Array.<string>} methodName The name(s) of the method(s) to be
	   *     used for constructing the new sequence. The method will be attached to
	   *     the `ObjectLikeSequence` prototype so that it can be chained with any other
	   *     methods that return object-like sequences.
	   * @param {Object} overrides An object containing function overrides for this
	   *     new sequence type. **Must** include `each`. *May* include `init` and
	   *     `get` (for looking up an element by key).
	   * @returns {Function} A constructor for a new type inheriting from
	   *     `ObjectLikeSequence`.
	   *
	   * @examples
	   * function downcaseKey(value, key) {
	   *   return [key.toLowerCase(), value];
	   * }
	   *
	   * Lazy.ObjectLikeSequence.define("caseInsensitive", {
	   *   init: function() {
	   *     var downcased = this.parent
	   *       .map(downcaseKey)
	   *       .toObject();
	   *     this.downcased = Lazy(downcased);
	   *   },
	   *
	   *   get: function(key) {
	   *     return this.downcased.get(key.toLowerCase());
	   *   },
	   *
	   *   each: function(fn) {
	   *     return this.downcased.each(fn);
	   *   }
	   * });
	   *
	   * Lazy({ Foo: 'bar' }).caseInsensitive()            // sequence: { foo: 'bar' }
	   * Lazy({ FOO: 'bar' }).caseInsensitive().get('foo') // => 'bar'
	   * Lazy({ FOO: 'bar' }).caseInsensitive().get('FOO') // => 'bar'
	   */
	  ObjectLikeSequence.define = function define(methodName, overrides) {
	    if (!overrides || typeof overrides.each !== 'function') {
	      throw new Error("A custom object-like sequence must implement *at least* each!");
	    }

	    return defineSequenceType(ObjectLikeSequence, methodName, overrides);
	  };

	  ObjectLikeSequence.prototype.value = function value() {
	    return this.toObject();
	  };

	  /**
	   * Gets the element at the specified key in this sequence.
	   *
	   * @public
	   * @param {string} key The key.
	   * @returns {*} The element.
	   *
	   * @examples
	   * Lazy({ foo: "bar" }).get("foo")                          // => "bar"
	   * Lazy({ foo: "bar" }).extend({ foo: "baz" }).get("foo")   // => "baz"
	   * Lazy({ foo: "bar" }).defaults({ bar: "baz" }).get("bar") // => "baz"
	   * Lazy({ foo: "bar" }).invert().get("bar")                 // => "foo"
	   * Lazy({ foo: 1, bar: 2 }).pick(["foo"]).get("foo")        // => 1
	   * Lazy({ foo: 1, bar: 2 }).pick(["foo"]).get("bar")        // => undefined
	   * Lazy({ foo: 1, bar: 2 }).omit(["foo"]).get("bar")        // => 2
	   * Lazy({ foo: 1, bar: 2 }).omit(["foo"]).get("foo")        // => undefined
	   */
	  ObjectLikeSequence.prototype.get = function get(key) {
	    var pair = this.pairs().find(function(pair) {
	      return pair[0] === key;
	    });

	    return pair ? pair[1] : undefined;
	  };

	  /**
	   * Returns a {@link Sequence} whose elements are the keys of this object-like
	   * sequence.
	   *
	   * @public
	   * @returns {Sequence} The sequence based on this sequence's keys.
	   *
	   * @examples
	   * Lazy({ hello: "hola", goodbye: "hasta luego" }).keys() // sequence: ["hello", "goodbye"]
	   */
	  ObjectLikeSequence.prototype.keys = function keys() {
	    return this.map(function(v, k) { return k; });
	  };

	  /**
	   * Returns a {@link Sequence} whose elements are the values of this object-like
	   * sequence.
	   *
	   * @public
	   * @returns {Sequence} The sequence based on this sequence's values.
	   *
	   * @examples
	   * Lazy({ hello: "hola", goodbye: "hasta luego" }).values() // sequence: ["hola", "hasta luego"]
	   */
	  ObjectLikeSequence.prototype.values = function values() {
	    return this.map(function(v, k) { return v; });
	  };

	  /**
	   * Throws an exception. Asynchronous iteration over object-like sequences is
	   * not supported.
	   *
	   * @public
	   * @examples
	   * Lazy({ foo: 'bar' }).async() // throws
	   */
	  ObjectLikeSequence.prototype.async = function async() {
	    throw new Error('An ObjectLikeSequence does not support asynchronous iteration.');
	  };

	  ObjectLikeSequence.prototype.filter = function filter(filterFn) {
	    return new FilteredObjectLikeSequence(this, createCallback(filterFn));
	  };

	  function FilteredObjectLikeSequence(parent, filterFn) {
	    this.parent = parent;
	    this.filterFn = filterFn;
	  }

	  FilteredObjectLikeSequence.prototype = new ObjectLikeSequence();

	  FilteredObjectLikeSequence.prototype.each = function each(fn) {
	    var filterFn = this.filterFn;

	    return this.parent.each(function(v, k) {
	      if (filterFn(v, k)) {
	        return fn(v, k);
	      }
	    });
	  };

	  /**
	   * Returns this same sequence. (Reversing an object-like sequence doesn't make
	   * any sense.)
	   */
	  ObjectLikeSequence.prototype.reverse = function reverse() {
	    return this;
	  };

	  /**
	   * Returns an {@link ObjectLikeSequence} whose elements are the combination of
	   * this sequence and another object. In the case of a key appearing in both this
	   * sequence and the given object, the other object's value will override the
	   * one in this sequence.
	   *
	   * @public
	   * @aka extend
	   * @param {Object} other The other object to assign to this sequence.
	   * @returns {ObjectLikeSequence} A new sequence comprising elements from this
	   *     sequence plus the contents of `other`.
	   *
	   * @examples
	   * Lazy({ "uno": 1, "dos": 2 }).assign({ "tres": 3 }) // sequence: { uno: 1, dos: 2, tres: 3 }
	   * Lazy({ foo: "bar" }).assign({ foo: "baz" });       // sequence: { foo: "baz" }
	   */
	  ObjectLikeSequence.prototype.assign = function assign(other) {
	    return new AssignSequence(this, other);
	  };

	  ObjectLikeSequence.prototype.extend = function extend(other) {
	    return this.assign(other);
	  };

	  /**
	   * @constructor
	   */
	  function AssignSequence(parent, other) {
	    this.parent = parent;
	    this.other  = other;
	  }

	  AssignSequence.prototype = new ObjectLikeSequence();

	  AssignSequence.prototype.get = function get(key) {
	    return this.other[key] || this.parent.get(key);
	  };

	  AssignSequence.prototype.each = function each(fn) {
	    var merged = new Set(),
	        done   = false;

	    Lazy(this.other).each(function(value, key) {
	      if (fn(value, key) === false) {
	        done = true;
	        return false;
	      }

	      merged.add(key);
	    });

	    if (!done) {
	      return this.parent.each(function(value, key) {
	        if (!merged.contains(key) && fn(value, key) === false) {
	          return false;
	        }
	      });
	    }
	  };

	  /**
	   * Returns an {@link ObjectLikeSequence} whose elements are the combination of
	   * this sequence and a 'default' object. In the case of a key appearing in both
	   * this sequence and the given object, this sequence's value will override the
	   * default object's.
	   *
	   * @public
	   * @param {Object} defaults The 'default' object to use for missing keys in this
	   *     sequence.
	   * @returns {ObjectLikeSequence} A new sequence comprising elements from this
	   *     sequence supplemented by the contents of `defaults`.
	   *
	   * @examples
	   * Lazy({ name: "Dan" }).defaults({ name: "User", password: "passw0rd" }) // sequence: { name: "Dan", password: "passw0rd" }
	   */
	  ObjectLikeSequence.prototype.defaults = function defaults(defaults) {
	    return new DefaultsSequence(this, defaults);
	  };

	  /**
	   * @constructor
	   */
	  function DefaultsSequence(parent, defaults) {
	    this.parent   = parent;
	    this.defaults = defaults;
	  }

	  DefaultsSequence.prototype = new ObjectLikeSequence();

	  DefaultsSequence.prototype.get = function get(key) {
	    return this.parent.get(key) || this.defaults[key];
	  };

	  DefaultsSequence.prototype.each = function each(fn) {
	    var merged = new Set(),
	        done   = false;

	    this.parent.each(function(value, key) {
	      if (fn(value, key) === false) {
	        done = true;
	        return false;
	      }

	      if (typeof value !== "undefined") {
	        merged.add(key);
	      }
	    });

	    if (!done) {
	      Lazy(this.defaults).each(function(value, key) {
	        if (!merged.contains(key) && fn(value, key) === false) {
	          return false;
	        }
	      });
	    }
	  };

	  /**
	   * Returns an {@link ObjectLikeSequence} whose values are this sequence's keys,
	   * and whose keys are this sequence's values.
	   *
	   * @public
	   * @returns {ObjectLikeSequence} A new sequence comprising the inverted keys and
	   *     values from this sequence.
	   *
	   * @examples
	   * Lazy({ first: "Dan", last: "Tao" }).invert() // sequence: { Dan: "first", Tao: "last" }
	   */
	  ObjectLikeSequence.prototype.invert = function invert() {
	    return new InvertedSequence(this);
	  };

	  /**
	   * @constructor
	   */
	  function InvertedSequence(parent) {
	    this.parent = parent;
	  }

	  InvertedSequence.prototype = new ObjectLikeSequence();

	  InvertedSequence.prototype.each = function each(fn) {
	    this.parent.each(function(value, key) {
	      return fn(key, value);
	    });
	  };

	  /**
	   * Produces an {@link ObjectLikeSequence} consisting of all the recursively
	   * merged values from this and the given object(s) or sequence(s).
	   *
	   * Note that by default this method only merges "vanilla" objects (bags of
	   * key/value pairs), not arrays or any other custom object types. To customize
	   * how merging works, you can provide the mergeFn argument, e.g. to handling
	   * merging arrays, strings, or other types of objects.
	   *
	   * @public
	   * @param {...Object|ObjectLikeSequence} others The other object(s) or
	   *     sequence(s) whose values will be merged into this one.
	   * @param {Function=} mergeFn An optional function used to customize merging
	   *     behavior. The function should take two values as parameters and return
	   *     whatever the "merged" form of those values is. If the function returns
	   *     undefined then the new value will simply replace the old one in the
	   *     final result.
	   * @returns {ObjectLikeSequence} The new sequence consisting of merged values.
	   *
	   * @examples
	   * // These examples are completely stolen from Lo-Dash's documentation:
	   * // lodash.com/docs#merge
	   *
	   * var names = {
	   *   'characters': [
	   *     { 'name': 'barney' },
	   *     { 'name': 'fred' }
	   *   ]
	   * };
	   *
	   * var ages = {
	   *   'characters': [
	   *     { 'age': 36 },
	   *     { 'age': 40 }
	   *   ]
	   * };
	   *
	   * var food = {
	   *   'fruits': ['apple'],
	   *   'vegetables': ['beet']
	   * };
	   *
	   * var otherFood = {
	   *   'fruits': ['banana'],
	   *   'vegetables': ['carrot']
	   * };
	   *
	   * function mergeArrays(a, b) {
	   *   return Array.isArray(a) ? a.concat(b) : undefined;
	   * }
	   *
	   * Lazy(names).merge(ages); // => sequence: { 'characters': [{ 'name': 'barney', 'age': 36 }, { 'name': 'fred', 'age': 40 }] }
	   * Lazy(food).merge(otherFood, mergeArrays); // => sequence: { 'fruits': ['apple', 'banana'], 'vegetables': ['beet', 'carrot'] }
	   *
	   * // ----- Now for my own tests: -----
	   *
	   * // merges objects
	   * Lazy({ foo: 1 }).merge({ foo: 2 }); // => sequence: { foo: 2 }
	   * Lazy({ foo: 1 }).merge({ bar: 2 }); // => sequence: { foo: 1, bar: 2 }
	   *
	   * // goes deep
	   * Lazy({ foo: { bar: 1 } }).merge({ foo: { bar: 2 } }); // => sequence: { foo: { bar: 2 } }
	   * Lazy({ foo: { bar: 1 } }).merge({ foo: { baz: 2 } }); // => sequence: { foo: { bar: 1, baz: 2 } }
	   * Lazy({ foo: { bar: 1 } }).merge({ foo: { baz: 2 } }); // => sequence: { foo: { bar: 1, baz: 2 } }
	   *
	   * // gives precedence to later sources
	   * Lazy({ foo: 1 }).merge({ bar: 2 }, { bar: 3 }); // => sequence: { foo: 1, bar: 3 }
	   *
	   * // undefined gets passed over
	   * Lazy({ foo: 1 }).merge({ foo: undefined }); // => sequence: { foo: 1 }
	   *
	   * // null doesn't get passed over
	   * Lazy({ foo: 1 }).merge({ foo: null }); // => sequence: { foo: null }
	   *
	   * // array contents get merged as well
	   * Lazy({ foo: [{ bar: 1 }] }).merge({ foo: [{ baz: 2 }] }); // => sequence: { foo: [{ bar: 1, baz: 2}] }
	   */
	  ObjectLikeSequence.prototype.merge = function merge(var_args) {
	    var mergeFn = arguments.length > 1 && typeof arguments[arguments.length - 1] === "function" ?
	      arrayPop.call(arguments) : null;
	    return new MergedSequence(this, arraySlice.call(arguments, 0), mergeFn);
	  };

	  /**
	   * @constructor
	   */
	  function MergedSequence(parent, others, mergeFn) {
	    this.parent  = parent;
	    this.others  = others;
	    this.mergeFn = mergeFn;
	  }

	  MergedSequence.prototype = new ObjectLikeSequence();

	  MergedSequence.prototype.each = function each(fn) {
	    var others  = this.others,
	        mergeFn = this.mergeFn || mergeObjects,
	        keys    = {};

	    var iteratedFullSource = this.parent.each(function(value, key) {
	      var merged = value;

	      forEach(others, function(other) {
	        if (key in other) {
	          merged = mergeFn(merged, other[key]);
	        }
	      });

	      keys[key] = true;

	      return fn(merged, key);
	    });

	    if (iteratedFullSource === false) {
	      return false;
	    }

	    var remaining = {};

	    forEach(others, function(other) {
	      for (var k in other) {
	        if (!keys[k]) {
	          remaining[k] = mergeFn(remaining[k], other[k]);
	        }
	      }
	    });

	    return Lazy(remaining).each(fn);
	  };

	  /**
	   * @private
	   * @examples
	   * mergeObjects({ foo: 1 }, { bar: 2 }); // => { foo: 1, bar: 2 }
	   * mergeObjects({ foo: { bar: 1 } }, { foo: { baz: 2 } }); // => { foo: { bar: 1, baz: 2 } }
	   * mergeObjects({ foo: { bar: 1 } }, { foo: undefined }); // => { foo: { bar: 1 } }
	   * mergeObjects({ foo: { bar: 1 } }, { foo: null }); // => { foo: null }
	   * mergeObjects({ array: [0, 1, 2] }, { array: [3, 4, 5] }).array; // instanceof Array
	   * mergeObjects({ date: new Date() }, { date: new Date() }).date; // instanceof Date
	   * mergeObjects([{ foo: 1 }], [{ bar: 2 }]); // => [{ foo: 1, bar: 2 }]
	   */
	  function mergeObjects(a, b) {
	    var merged, prop;

	    if (typeof b === 'undefined') {
	      return a;
	    }

	    // Check that we're dealing with two objects or two arrays.
	    if (isVanillaObject(a) && isVanillaObject(b)) {
	      merged = {};
	    } else if (a instanceof Array && b instanceof Array) {
	      merged = [];
	    } else {
	      // Otherwise there's no merging to do -- just replace a w/ b.
	      return b;
	    }

	    for (prop in a) {
	      merged[prop] = mergeObjects(a[prop], b[prop]);
	    }
	    for (prop in b) {
	      if (!merged[prop]) {
	        merged[prop] = b[prop];
	      }
	    }
	    return merged;
	  }

	  /**
	   * Checks whether an object is a "vanilla" object, i.e. {'foo': 'bar'} as
	   * opposed to an array, date, etc.
	   *
	   * @private
	   * @examples
	   * isVanillaObject({foo: 'bar'}); // => true
	   * isVanillaObject(new Date());   // => false
	   * isVanillaObject([1, 2, 3]);    // => false
	   */
	  function isVanillaObject(object) {
	    return object && object.constructor === Object;
	  }

	  /**
	   * Creates a {@link Sequence} consisting of the keys from this sequence whose
	   *     values are functions.
	   *
	   * @public
	   * @aka methods
	   * @returns {Sequence} The new sequence.
	   *
	   * @examples
	   * var dog = {
	   *   name: "Fido",
	   *   breed: "Golden Retriever",
	   *   bark: function() { console.log("Woof!"); },
	   *   wagTail: function() { console.log("TODO: implement robotic dog interface"); }
	   * };
	   *
	   * Lazy(dog).functions() // sequence: ["bark", "wagTail"]
	   */
	  ObjectLikeSequence.prototype.functions = function functions() {
	    return this
	      .filter(function(v, k) { return typeof(v) === "function"; })
	      .map(function(v, k) { return k; });
	  };

	  ObjectLikeSequence.prototype.methods = function methods() {
	    return this.functions();
	  };

	  /**
	   * Creates an {@link ObjectLikeSequence} consisting of the key/value pairs from
	   * this sequence whose keys are included in the given array of property names.
	   *
	   * @public
	   * @param {Array} properties An array of the properties to "pick" from this
	   *     sequence.
	   * @returns {ObjectLikeSequence} The new sequence.
	   *
	   * @examples
	   * var players = {
	   *   "who": "first",
	   *   "what": "second",
	   *   "i don't know": "third"
	   * };
	   *
	   * Lazy(players).pick(["who", "what"]) // sequence: { who: "first", what: "second" }
	   */
	  ObjectLikeSequence.prototype.pick = function pick(properties) {
	    return new PickSequence(this, properties);
	  };

	  /**
	   * @constructor
	   */
	  function PickSequence(parent, properties) {
	    this.parent     = parent;
	    this.properties = properties;
	  }

	  PickSequence.prototype = new ObjectLikeSequence();

	  PickSequence.prototype.get = function get(key) {
	    return arrayContains(this.properties, key) ? this.parent.get(key) : undefined;
	  };

	  PickSequence.prototype.each = function each(fn) {
	    var inArray    = arrayContains,
	        properties = this.properties;

	    return this.parent.each(function(value, key) {
	      if (inArray(properties, key)) {
	        return fn(value, key);
	      }
	    });
	  };

	  /**
	   * Creates an {@link ObjectLikeSequence} consisting of the key/value pairs from
	   * this sequence excluding those with the specified keys.
	   *
	   * @public
	   * @param {Array} properties An array of the properties to *omit* from this
	   *     sequence.
	   * @returns {ObjectLikeSequence} The new sequence.
	   *
	   * @examples
	   * var players = {
	   *   "who": "first",
	   *   "what": "second",
	   *   "i don't know": "third"
	   * };
	   *
	   * Lazy(players).omit(["who", "what"]) // sequence: { "i don't know": "third" }
	   */
	  ObjectLikeSequence.prototype.omit = function omit(properties) {
	    return new OmitSequence(this, properties);
	  };

	  /**
	   * @constructor
	   */
	  function OmitSequence(parent, properties) {
	    this.parent     = parent;
	    this.properties = properties;
	  }

	  OmitSequence.prototype = new ObjectLikeSequence();

	  OmitSequence.prototype.get = function get(key) {
	    return arrayContains(this.properties, key) ? undefined : this.parent.get(key);
	  };

	  OmitSequence.prototype.each = function each(fn) {
	    var inArray    = arrayContains,
	        properties = this.properties;

	    return this.parent.each(function(value, key) {
	      if (!inArray(properties, key)) {
	        return fn(value, key);
	      }
	    });
	  };

	  /**
	   * Maps the key/value pairs in this sequence to arrays.
	   *
	   * @public
	   * @aka toArray
	   * @returns {Sequence} An sequence of `[key, value]` pairs.
	   *
	   * @examples
	   * var colorCodes = {
	   *   red: "#f00",
	   *   green: "#0f0",
	   *   blue: "#00f"
	   * };
	   *
	   * Lazy(colorCodes).pairs() // sequence: [["red", "#f00"], ["green", "#0f0"], ["blue", "#00f"]]
	   */
	  ObjectLikeSequence.prototype.pairs = function pairs() {
	    return this.map(function(v, k) { return [k, v]; });
	  };

	  /**
	   * Creates an array from the key/value pairs in this sequence.
	   *
	   * @public
	   * @returns {Array} An array of `[key, value]` elements.
	   *
	   * @examples
	   * var colorCodes = {
	   *   red: "#f00",
	   *   green: "#0f0",
	   *   blue: "#00f"
	   * };
	   *
	   * Lazy(colorCodes).toArray() // => [["red", "#f00"], ["green", "#0f0"], ["blue", "#00f"]]
	   */
	  ObjectLikeSequence.prototype.toArray = function toArray() {
	    return this.pairs().toArray();
	  };

	  /**
	   * Creates an object with the key/value pairs from this sequence.
	   *
	   * @public
	   * @returns {Object} An object with the same key/value pairs as this sequence.
	   *
	   * @examples
	   * var colorCodes = {
	   *   red: "#f00",
	   *   green: "#0f0",
	   *   blue: "#00f"
	   * };
	   *
	   * Lazy(colorCodes).toObject() // => { red: "#f00", green: "#0f0", blue: "#00f" }
	   */
	  ObjectLikeSequence.prototype.toObject = function toObject() {
	    return this.reduce(function(object, value, key) {
	      object[key] = value;
	      return object;
	    }, {});
	  };

	  // Now that we've fully initialized the ObjectLikeSequence prototype, we can
	  // actually set the prototypes for GroupedSequence, IndexedSequence, and
	  // CountedSequence.

	  GroupedSequence.prototype = new ObjectLikeSequence();

	  GroupedSequence.prototype.each = function each(fn) {
	    var keyFn   = createCallback(this.keyFn),
	        valFn   = createCallback(this.valFn),
	        result;

	    result = this.parent.reduce(function(grouped,e) {
	      var key = keyFn(e),
	          val = valFn(e);
	      if (!(grouped[key] instanceof Array)) {
	        grouped[key] = [val];
	      } else {
	        grouped[key].push(val);
	      }
	      return grouped;
	    },{});

	    return transform(function(grouped) {
	      for (var key in grouped) {
	        if (fn(grouped[key], key) === false) {
	          return false;
	        }
	      }
	    }, result);
	  };

	  IndexedSequence.prototype = new ObjectLikeSequence();

	  IndexedSequence.prototype.each = function each(fn) {
	    var keyFn   = createCallback(this.keyFn),
	        valFn   = createCallback(this.valFn),
	        indexed = {};

	    return this.parent.each(function(e) {
	      var key = keyFn(e),
	          val = valFn(e);

	      if (!indexed[key]) {
	        indexed[key] = val;
	        return fn(val, key);
	      }
	    });
	  };

	  CountedSequence.prototype = new ObjectLikeSequence();

	  CountedSequence.prototype.each = function each(fn) {
	    var keyFn   = createCallback(this.keyFn),
	        counted = {};

	    this.parent.each(function(e) {
	      var key = keyFn(e);
	      if (!counted[key]) {
	        counted[key] = 1;
	      } else {
	        counted[key] += 1;
	      }
	    });

	    for (var key in counted) {
	      if (fn(counted[key], key) === false) {
	        return false;
	      }
	    }

	    return true;
	  };

	  /**
	   * Watches for all changes to a specified property (or properties) of an
	   * object and produces a sequence whose elements have the properties
	   * `{ property, value }` indicating which property changed and what it was
	   * changed to.
	   *
	   * Note that this method **only works on directly wrapped objects**; it will
	   * *not* work on any arbitrary {@link ObjectLikeSequence}.
	   *
	   * @public
	   * @param {(string|Array)=} propertyNames A property name or array of property
	   *     names to watch. If this parameter is `undefined`, all of the object's
	   *     current (enumerable) properties will be watched.
	   * @returns {Sequence} A sequence comprising `{ property, value }` objects
	   *     describing each change to the specified property/properties.
	   *
	   * @examples
	   * var obj = {},
	   *     changes = [];
	   *
	   * Lazy(obj).watch('foo').each(function(change) {
	   *   changes.push(change);
	   * });
	   *
	   * obj.foo = 1;
	   * obj.bar = 2;
	   * obj.foo = 3;
	   *
	   * obj.foo; // => 3
	   * changes; // => [{ property: 'foo', value: 1 }, { property: 'foo', value: 3 }]
	   */
	  ObjectLikeSequence.prototype.watch = function watch(propertyNames) {
	    throw new Error('You can only call #watch on a directly wrapped object.');
	  };

	  /**
	   * @constructor
	   */
	  function ObjectWrapper(source) {
	    this.source = source;
	  }

	  ObjectWrapper.prototype = new ObjectLikeSequence();

	  ObjectWrapper.prototype.root = function root() {
	    return this;
	  };

	  ObjectWrapper.prototype.isAsync = function isAsync() {
	    return false;
	  };

	  ObjectWrapper.prototype.get = function get(key) {
	    return this.source[key];
	  };

	  ObjectWrapper.prototype.each = function each(fn) {
	    var source = this.source,
	        key;

	    for (key in source) {
	      if (fn(source[key], key) === false) {
	        return false;
	      }
	    }

	    return true;
	  };

	  /**
	   * A `StringLikeSequence` represents a sequence of characters.
	   *
	   * The initial sequence you get by wrapping a string with `Lazy(string)` is a
	   * `StringLikeSequence`.
	   *
	   * All methods of `StringLikeSequence` that conceptually should return
	   * something like a string return another `StringLikeSequence`.
	   *
	   * @public
	   * @constructor
	   *
	   * @examples
	   * function upcase(str) { return str.toUpperCase(); }
	   *
	   * Lazy('foo')               // instanceof Lazy.StringLikeSequence
	   * Lazy('foo').toUpperCase() // instanceof Lazy.StringLikeSequence
	   * Lazy('foo').reverse()     // instanceof Lazy.StringLikeSequence
	   * Lazy('foo').take(2)       // instanceof Lazy.StringLikeSequence
	   * Lazy('foo').drop(1)       // instanceof Lazy.StringLikeSequence
	   * Lazy('foo').substring(1)  // instanceof Lazy.StringLikeSequence
	   *
	   * // Note that `map` does not create a `StringLikeSequence` because there's
	   * // no guarantee the mapping function will return characters. In the event
	   * // you do want to map a string onto a string-like sequence, use
	   * // `mapString`:
	   * Lazy('foo').map(Lazy.identity)       // instanceof Lazy.ArrayLikeSequence
	   * Lazy('foo').mapString(Lazy.identity) // instanceof Lazy.StringLikeSequence
	   */
	  function StringLikeSequence() {}

	  StringLikeSequence.prototype = new ArrayLikeSequence();

	  /**
	   * Create a new constructor function for a type inheriting from
	   * `StringLikeSequence`.
	   *
	   * @public
	   * @param {string|Array.<string>} methodName The name(s) of the method(s) to be
	   *     used for constructing the new sequence. The method will be attached to
	   *     the `StringLikeSequence` prototype so that it can be chained with any other
	   *     methods that return string-like sequences.
	   * @param {Object} overrides An object containing function overrides for this
	   *     new sequence type. Has the same requirements as
	   *     {@link ArrayLikeSequence.define}.
	   * @returns {Function} A constructor for a new type inheriting from
	   *     `StringLikeSequence`.
	   *
	   * @examples
	   * Lazy.StringLikeSequence.define("zomg", {
	   *   length: function() {
	   *     return this.parent.length() + "!!ZOMG!!!1".length;
	   *   },
	   *
	   *   get: function(i) {
	   *     if (i < this.parent.length()) {
	   *       return this.parent.get(i);
	   *     }
	   *     return "!!ZOMG!!!1".charAt(i - this.parent.length());
	   *   }
	   * });
	   *
	   * Lazy('foo').zomg() // sequence: "foo!!ZOMG!!!1"
	   */
	  StringLikeSequence.define = function define(methodName, overrides) {
	    if (!overrides || typeof overrides.get !== 'function') {
	      throw new Error("A custom string-like sequence must implement *at least* get!");
	    }

	    return defineSequenceType(StringLikeSequence, methodName, overrides);
	  };

	  StringLikeSequence.prototype.value = function value() {
	    return this.toString();
	  };

	  /**
	   * Returns an {@link IndexedIterator} that will step over each character in this
	   * sequence one by one.
	   *
	   * @returns {IndexedIterator} The iterator.
	   */
	  StringLikeSequence.prototype.getIterator = function getIterator() {
	    return new CharIterator(this);
	  };

	  /**
	   * @constructor
	   */
	  function CharIterator(source) {
	    this.source = Lazy(source);
	    this.index = -1;
	  }

	  CharIterator.prototype.current = function current() {
	    return this.source.charAt(this.index);
	  };

	  CharIterator.prototype.moveNext = function moveNext() {
	    return (++this.index < this.source.length());
	  };

	  /**
	   * Returns the character at the given index of this sequence, or the empty
	   * string if the specified index lies outside the bounds of the sequence.
	   *
	   * @public
	   * @param {number} i The index of this sequence.
	   * @returns {string} The character at the specified index.
	   *
	   * @examples
	   * Lazy("foo").charAt(0)  // => "f"
	   * Lazy("foo").charAt(-1) // => ""
	   * Lazy("foo").charAt(10) // => ""
	   */
	  StringLikeSequence.prototype.charAt = function charAt(i) {
	    return this.get(i);
	  };

	  /**
	   * Returns the character code at the given index of this sequence, or `NaN` if
	   * the index lies outside the bounds of the sequence.
	   *
	   * @public
	   * @param {number} i The index of the character whose character code you want.
	   * @returns {number} The character code.
	   *
	   * @examples
	   * Lazy("abc").charCodeAt(0)  // => 97
	   * Lazy("abc").charCodeAt(-1) // => NaN
	   * Lazy("abc").charCodeAt(10) // => NaN
	   */
	  StringLikeSequence.prototype.charCodeAt = function charCodeAt(i) {
	    var char = this.charAt(i);
	    if (!char) { return NaN; }

	    return char.charCodeAt(0);
	  };

	  /**
	   * Returns a {@link StringLikeSequence} comprising the characters from *this*
	   * sequence starting at `start` and ending at `stop` (exclusive), or---if
	   * `stop` is `undefined`, including the rest of the sequence.
	   *
	   * @public
	   * @param {number} start The index where this sequence should begin.
	   * @param {number=} stop The index (exclusive) where this sequence should end.
	   * @returns {StringLikeSequence} The new sequence.
	   *
	   * @examples
	   * Lazy("foo").substring(1)      // sequence: "oo"
	   * Lazy("foo").substring(-1)     // sequence: "foo"
	   * Lazy("hello").substring(1, 3) // sequence: "el"
	   * Lazy("hello").substring(1, 9) // sequence: "ello"
	   */
	  StringLikeSequence.prototype.substring = function substring(start, stop) {
	    return new StringSegment(this, start, stop);
	  };

	  /**
	   * @constructor
	   */
	  function StringSegment(parent, start, stop) {
	    this.parent = parent;
	    this.start  = Math.max(0, start);
	    this.stop   = stop;
	  }

	  StringSegment.prototype = new StringLikeSequence();

	  StringSegment.prototype.get = function get(i) {
	    return this.parent.get(i + this.start);
	  };

	  StringSegment.prototype.length = function length() {
	    return (typeof this.stop === "number" ? this.stop : this.parent.length()) - this.start;
	  };

	  /**
	   * An optimized version of {@link Sequence#first} that returns another
	   * {@link StringLikeSequence} (or just the first character, if `count` is
	   * undefined).
	   *
	   * @public
	   * @examples
	   * Lazy('foo').first()                // => 'f'
	   * Lazy('fo').first(2)                // sequence: 'fo'
	   * Lazy('foo').first(10)              // sequence: 'foo'
	   * Lazy('foo').toUpperCase().first()  // => 'F'
	   * Lazy('foo').toUpperCase().first(2) // sequence: 'FO'
	   */
	  StringLikeSequence.prototype.first = function first(count) {
	    if (typeof count === "undefined") {
	      return this.charAt(0);
	    }

	    return this.substring(0, count);
	  };

	  /**
	   * An optimized version of {@link Sequence#last} that returns another
	   * {@link StringLikeSequence} (or just the last character, if `count` is
	   * undefined).
	   *
	   * @public
	   * @examples
	   * Lazy('foo').last()                // => 'o'
	   * Lazy('foo').last(2)               // sequence: 'oo'
	   * Lazy('foo').last(10)              // sequence: 'foo'
	   * Lazy('foo').toUpperCase().last()  // => 'O'
	   * Lazy('foo').toUpperCase().last(2) // sequence: 'OO'
	   */
	  StringLikeSequence.prototype.last = function last(count) {
	    if (typeof count === "undefined") {
	      return this.charAt(this.length() - 1);
	    }

	    return this.substring(this.length() - count);
	  };

	  StringLikeSequence.prototype.drop = function drop(count) {
	    return this.substring(count);
	  };

	  /**
	   * Finds the index of the first occurrence of the given substring within this
	   * sequence, starting from the specified index (or the beginning of the
	   * sequence).
	   *
	   * @public
	   * @param {string} substring The substring to search for.
	   * @param {number=} startIndex The index from which to start the search.
	   * @returns {number} The first index where the given substring is found, or
	   *     -1 if it isn't in the sequence.
	   *
	   * @examples
	   * Lazy('canal').indexOf('a')    // => 1
	   * Lazy('canal').indexOf('a', 2) // => 3
	   * Lazy('canal').indexOf('ana')  // => 1
	   * Lazy('canal').indexOf('andy') // => -1
	   * Lazy('canal').indexOf('x')    // => -1
	   */
	  StringLikeSequence.prototype.indexOf = function indexOf(substring, startIndex) {
	    return this.toString().indexOf(substring, startIndex);
	  };

	  /**
	   * Finds the index of the last occurrence of the given substring within this
	   * sequence, starting from the specified index (or the end of the sequence)
	   * and working backwards.
	   *
	   * @public
	   * @param {string} substring The substring to search for.
	   * @param {number=} startIndex The index from which to start the search.
	   * @returns {number} The last index where the given substring is found, or
	   *     -1 if it isn't in the sequence.
	   *
	   * @examples
	   * Lazy('canal').lastIndexOf('a')    // => 3
	   * Lazy('canal').lastIndexOf('a', 2) // => 1
	   * Lazy('canal').lastIndexOf('ana')  // => 1
	   * Lazy('canal').lastIndexOf('andy') // => -1
	   * Lazy('canal').lastIndexOf('x')    // => -1
	   */
	  StringLikeSequence.prototype.lastIndexOf = function lastIndexOf(substring, startIndex) {
	    return this.toString().lastIndexOf(substring, startIndex);
	  };

	  /**
	   * Checks if this sequence contains a given substring.
	   *
	   * @public
	   * @param {string} substring The substring to check for.
	   * @returns {boolean} Whether or not this sequence contains `substring`.
	   *
	   * @examples
	   * Lazy('hello').contains('ell') // => true
	   * Lazy('hello').contains('')    // => true
	   * Lazy('hello').contains('abc') // => false
	   */
	  StringLikeSequence.prototype.contains = function contains(substring) {
	    return this.indexOf(substring) !== -1;
	  };

	  /**
	   * Checks if this sequence ends with a given suffix.
	   *
	   * @public
	   * @param {string} suffix The suffix to check for.
	   * @returns {boolean} Whether or not this sequence ends with `suffix`.
	   *
	   * @examples
	   * Lazy('foo').endsWith('oo')  // => true
	   * Lazy('foo').endsWith('')    // => true
	   * Lazy('foo').endsWith('abc') // => false
	   */
	  StringLikeSequence.prototype.endsWith = function endsWith(suffix) {
	    return this.substring(this.length() - suffix.length).toString() === suffix;
	  };

	  /**
	   * Checks if this sequence starts with a given prefix.
	   *
	   * @public
	   * @param {string} prefix The prefix to check for.
	   * @returns {boolean} Whether or not this sequence starts with `prefix`.
	   *
	   * @examples
	   * Lazy('foo').startsWith('fo')  // => true
	   * Lazy('foo').startsWith('')    // => true
	   * Lazy('foo').startsWith('abc') // => false
	   */
	  StringLikeSequence.prototype.startsWith = function startsWith(prefix) {
	    return this.substring(0, prefix.length).toString() === prefix;
	  };

	  /**
	   * Converts all of the characters in this string to uppercase.
	   *
	   * @public
	   * @returns {StringLikeSequence} A new sequence with the same characters as
	   *     this sequence, all uppercase.
	   *
	   * @examples
	   * function nextLetter(a) {
	   *   return String.fromCharCode(a.charCodeAt(0) + 1);
	   * }
	   *
	   * Lazy('foo').toUpperCase()                       // sequence: 'FOO'
	   * Lazy('foo').substring(1).toUpperCase()          // sequence: 'OO'
	   * Lazy('abc').mapString(nextLetter).toUpperCase() // sequence: 'BCD'
	   */
	  StringLikeSequence.prototype.toUpperCase = function toUpperCase() {
	    return this.mapString(function(char) { return char.toUpperCase(); });
	  };

	  /**
	   * Converts all of the characters in this string to lowercase.
	   *
	   * @public
	   * @returns {StringLikeSequence} A new sequence with the same characters as
	   *     this sequence, all lowercase.
	   *
	   * @examples
	   * function nextLetter(a) {
	   *   return String.fromCharCode(a.charCodeAt(0) + 1);
	   * }
	   *
	   * Lazy('FOO').toLowerCase()                       // sequence: 'foo'
	   * Lazy('FOO').substring(1).toLowerCase()          // sequence: 'oo'
	   * Lazy('ABC').mapString(nextLetter).toLowerCase() // sequence: 'bcd'
	   */
	  StringLikeSequence.prototype.toLowerCase = function toLowerCase() {
	    return this.mapString(function(char) { return char.toLowerCase(); });
	  };

	  /**
	   * Maps the characters of this sequence onto a new {@link StringLikeSequence}.
	   *
	   * @public
	   * @param {Function} mapFn The function used to map characters from this
	   *     sequence onto the new sequence.
	   * @returns {StringLikeSequence} The new sequence.
	   *
	   * @examples
	   * function upcase(char) { return char.toUpperCase(); }
	   *
	   * Lazy("foo").mapString(upcase)               // sequence: "FOO"
	   * Lazy("foo").mapString(upcase).charAt(0)     // => "F"
	   * Lazy("foo").mapString(upcase).charCodeAt(0) // => 70
	   * Lazy("foo").mapString(upcase).substring(1)  // sequence: "OO"
	   */
	  StringLikeSequence.prototype.mapString = function mapString(mapFn) {
	    return new MappedStringLikeSequence(this, mapFn);
	  };

	  /**
	   * @constructor
	   */
	  function MappedStringLikeSequence(parent, mapFn) {
	    this.parent = parent;
	    this.mapFn  = mapFn;
	  }

	  MappedStringLikeSequence.prototype = new StringLikeSequence();
	  MappedStringLikeSequence.prototype.get = IndexedMappedSequence.prototype.get;
	  MappedStringLikeSequence.prototype.length = IndexedMappedSequence.prototype.length;

	  /**
	   * Returns a copy of this sequence that reads back to front.
	   *
	   * @public
	   *
	   * @examples
	   * Lazy("abcdefg").reverse() // sequence: "gfedcba"
	   */
	  StringLikeSequence.prototype.reverse = function reverse() {
	    return new ReversedStringLikeSequence(this);
	  };

	  /**
	   * @constructor
	   */
	  function ReversedStringLikeSequence(parent) {
	    this.parent = parent;
	  }

	  ReversedStringLikeSequence.prototype = new StringLikeSequence();
	  ReversedStringLikeSequence.prototype.get = IndexedReversedSequence.prototype.get;
	  ReversedStringLikeSequence.prototype.length = IndexedReversedSequence.prototype.length;

	  StringLikeSequence.prototype.toString = function toString() {
	    return this.join("");
	  };

	  /**
	   * Creates a {@link Sequence} comprising all of the matches for the specified
	   * pattern in the underlying string.
	   *
	   * @public
	   * @param {RegExp} pattern The pattern to match.
	   * @returns {Sequence} A sequence of all the matches.
	   *
	   * @examples
	   * Lazy("abracadabra").match(/a[bcd]/) // sequence: ["ab", "ac", "ad", "ab"]
	   * Lazy("fee fi fo fum").match(/\w+/)  // sequence: ["fee", "fi", "fo", "fum"]
	   * Lazy("hello").match(/xyz/)          // sequence: []
	   */
	  StringLikeSequence.prototype.match = function match(pattern) {
	    return new StringMatchSequence(this, pattern);
	  };

	  /**
	   * @constructor
	   */
	  function StringMatchSequence(parent, pattern) {
	    this.parent = parent;
	    this.pattern = pattern;
	  }

	  StringMatchSequence.prototype = new Sequence();

	  StringMatchSequence.prototype.getIterator = function getIterator() {
	    return new StringMatchIterator(this.parent.toString(), this.pattern);
	  };

	  /**
	   * @constructor
	   */
	  function StringMatchIterator(source, pattern) {
	    this.source  = source;
	    this.pattern = cloneRegex(pattern);
	  }

	  StringMatchIterator.prototype.current = function current() {
	    return this.match[0];
	  };

	  StringMatchIterator.prototype.moveNext = function moveNext() {
	    return !!(this.match = this.pattern.exec(this.source));
	  };

	  /**
	   * Creates a {@link Sequence} comprising all of the substrings of this string
	   * separated by the given delimiter, which can be either a string or a regular
	   * expression.
	   *
	   * @public
	   * @param {string|RegExp} delimiter The delimiter to use for recognizing
	   *     substrings.
	   * @returns {Sequence} A sequence of all the substrings separated by the given
	   *     delimiter.
	   *
	   * @examples
	   * Lazy("foo").split("")                      // sequence: ["f", "o", "o"]
	   * Lazy("yo dawg").split(" ")                 // sequence: ["yo", "dawg"]
	   * Lazy("bah bah\tblack  sheep").split(/\s+/) // sequence: ["bah", "bah", "black", "sheep"]
	   */
	  StringLikeSequence.prototype.split = function split(delimiter) {
	    return new SplitStringSequence(this, delimiter);
	  };

	  /**
	   * @constructor
	   */
	  function SplitStringSequence(parent, pattern) {
	    this.parent = parent;
	    this.pattern = pattern;
	  }

	  SplitStringSequence.prototype = new Sequence();

	  SplitStringSequence.prototype.getIterator = function getIterator() {
	    var source = this.parent.toString();

	    if (this.pattern instanceof RegExp) {
	      if (this.pattern.source === "" || this.pattern.source === "(?:)") {
	        return new CharIterator(source);
	      } else {
	        return new SplitWithRegExpIterator(source, this.pattern);
	      }
	    } else if (this.pattern === "") {
	      return new CharIterator(source);
	    } else {
	      return new SplitWithStringIterator(source, this.pattern);
	    }
	  };

	  /**
	   * @constructor
	   */
	  function SplitWithRegExpIterator(source, pattern) {
	    this.source  = source;
	    this.pattern = cloneRegex(pattern);
	  }

	  SplitWithRegExpIterator.prototype.current = function current() {
	    return this.source.substring(this.start, this.end);
	  };

	  SplitWithRegExpIterator.prototype.moveNext = function moveNext() {
	    if (!this.pattern) {
	      return false;
	    }

	    var match = this.pattern.exec(this.source);

	    if (match) {
	      this.start = this.nextStart ? this.nextStart : 0;
	      this.end = match.index;
	      this.nextStart = match.index + match[0].length;
	      return true;

	    } else if (this.pattern) {
	      this.start = this.nextStart;
	      this.end = undefined;
	      this.nextStart = undefined;
	      this.pattern = undefined;
	      return true;
	    }

	    return false;
	  };

	  /**
	   * @constructor
	   */
	  function SplitWithStringIterator(source, delimiter) {
	    this.source = source;
	    this.delimiter = delimiter;
	  }

	  SplitWithStringIterator.prototype.current = function current() {
	    return this.source.substring(this.leftIndex, this.rightIndex);
	  };

	  SplitWithStringIterator.prototype.moveNext = function moveNext() {
	    if (!this.finished) {
	      this.leftIndex = typeof this.leftIndex !== "undefined" ?
	        this.rightIndex + this.delimiter.length :
	        0;
	      this.rightIndex = this.source.indexOf(this.delimiter, this.leftIndex);
	    }

	    if (this.rightIndex === -1) {
	      this.finished = true;
	      this.rightIndex = undefined;
	      return true;
	    }

	    return !this.finished;
	  };

	  /**
	   * Wraps a string exposing {@link #match} and {@link #split} methods that return
	   * {@link Sequence} objects instead of arrays, improving on the efficiency of
	   * JavaScript's built-in `String#split` and `String.match` methods and
	   * supporting asynchronous iteration.
	   *
	   * @param {string} source The string to wrap.
	   * @constructor
	   */
	  function StringWrapper(source) {
	    this.source = source;
	  }

	  StringWrapper.prototype = new StringLikeSequence();

	  StringWrapper.prototype.root = function root() {
	    return this;
	  };

	  StringWrapper.prototype.isAsync = function isAsync() {
	    return false;
	  };

	  StringWrapper.prototype.get = function get(i) {
	    return this.source.charAt(i);
	  };

	  StringWrapper.prototype.length = function length() {
	    return this.source.length;
	  };

	  StringWrapper.prototype.toString = function toString() {
	    return this.source;
	  };

	  /**
	   * A `GeneratedSequence` does not wrap an in-memory colllection but rather
	   * determines its elements on-the-fly during iteration according to a generator
	   * function.
	   *
	   * You create a `GeneratedSequence` by calling {@link Lazy.generate}.
	   *
	   * @public
	   * @constructor
	   * @param {function(number):*} generatorFn A function which accepts an index
	   *     and returns a value for the element at that position in the sequence.
	   * @param {number=} length The length of the sequence. If this argument is
	   *     omitted, the sequence will go on forever.
	   */
	  function GeneratedSequence(generatorFn, length) {
	    this.get = generatorFn;
	    this.fixedLength = length;
	  }

	  GeneratedSequence.prototype = new Sequence();

	  GeneratedSequence.prototype.isAsync = function isAsync() {
	    return false;
	  };

	  /**
	   * Returns the length of this sequence.
	   *
	   * @public
	   * @returns {number} The length, or `undefined` if this is an indefinite
	   *     sequence.
	   */
	  GeneratedSequence.prototype.length = function length() {
	    return this.fixedLength;
	  };

	  /**
	   * Iterates over the sequence produced by invoking this sequence's generator
	   * function up to its specified length, or, if length is `undefined`,
	   * indefinitely (in which case the sequence will go on forever--you would need
	   * to call, e.g., {@link Sequence#take} to limit iteration).
	   *
	   * @public
	   * @param {Function} fn The function to call on each output from the generator
	   *     function.
	   */
	  GeneratedSequence.prototype.each = function each(fn) {
	    var generatorFn = this.get,
	        length = this.fixedLength,
	        i = 0;

	    while (typeof length === "undefined" || i < length) {
	      if (fn(generatorFn(i), i++) === false) {
	        return false;
	      }
	    }

	    return true;
	  };

	  GeneratedSequence.prototype.getIterator = function getIterator() {
	    return new GeneratedIterator(this);
	  };

	  /**
	   * Iterates over a generated sequence. (This allows generated sequences to be
	   * iterated asynchronously.)
	   *
	   * @param {GeneratedSequence} sequence The generated sequence to iterate over.
	   * @constructor
	   */
	  function GeneratedIterator(sequence) {
	    this.sequence     = sequence;
	    this.index        = 0;
	    this.currentValue = null;
	  }

	  GeneratedIterator.prototype.current = function current() {
	    return this.currentValue;
	  };

	  GeneratedIterator.prototype.moveNext = function moveNext() {
	    var sequence = this.sequence;

	    if (typeof sequence.fixedLength === "number" && this.index >= sequence.fixedLength) {
	      return false;
	    }

	    this.currentValue = sequence.get(this.index++);
	    return true;
	  };

	  /**
	   * An `AsyncSequence` iterates over its elements asynchronously when
	   * {@link #each} is called.
	   *
	   * You get an `AsyncSequence` by calling {@link Sequence#async} on any
	   * sequence. Note that some sequence types may not support asynchronous
	   * iteration.
	   *
	   * Returning values
	   * ----------------
	   *
	   * Because of its asynchronous nature, an `AsyncSequence` cannot be used in the
	   * same way as other sequences for functions that return values directly (e.g.,
	   * `reduce`, `max`, `any`, even `toArray`).
	   *
	   * Instead, these methods return an `AsyncHandle` whose `onComplete` method
	   * accepts a callback that will be called with the final result once iteration
	   * has finished.
	   *
	   * Defining custom asynchronous sequences
	   * --------------------------------------
	   *
	   * There are plenty of ways to define an asynchronous sequence. Here's one.
	   *
	   * 1. First, implement an {@link Iterator}. This is an object whose prototype
	   *    has the methods {@link Iterator#moveNext} (which returns a `boolean`) and
	   *    {@link current} (which returns the current value).
	   * 2. Next, create a simple wrapper that inherits from `AsyncSequence`, whose
	   *    `getIterator` function returns an instance of the iterator type you just
	   *    defined.
	   *
	   * The default implementation for {@link #each} on an `AsyncSequence` is to
	   * create an iterator and then asynchronously call {@link Iterator#moveNext}
	   * (using `setImmediate`, if available, otherwise `setTimeout`) until the iterator
	   * can't move ahead any more.
	   *
	   * @public
	   * @constructor
	   * @param {Sequence} parent A {@link Sequence} to wrap, to expose asynchronous
	   *     iteration.
	   * @param {number=} interval How many milliseconds should elapse between each
	   *     element when iterating over this sequence. If this argument is omitted,
	   *     asynchronous iteration will be executed as fast as possible.
	   */
	  function AsyncSequence(parent, interval) {
	    if (parent instanceof AsyncSequence) {
	      throw new Error("Sequence is already asynchronous!");
	    }

	    this.parent         = parent;
	    this.interval       = interval;
	    this.onNextCallback = getOnNextCallback(interval);
	    this.cancelCallback = getCancelCallback(interval);
	  }

	  AsyncSequence.prototype = new Sequence();

	  AsyncSequence.prototype.isAsync = function isAsync() {
	    return true;
	  };

	  /**
	   * Throws an exception. You cannot manually iterate over an asynchronous
	   * sequence.
	   *
	   * @public
	   * @example
	   * Lazy([1, 2, 3]).async().getIterator() // throws
	   */
	  AsyncSequence.prototype.getIterator = function getIterator() {
	    throw new Error('An AsyncSequence does not support synchronous iteration.');
	  };

	  /**
	   * An asynchronous version of {@link Sequence#each}.
	   *
	   * @public
	   * @param {Function} fn The function to invoke asynchronously on each element in
	   *     the sequence one by one.
	   * @returns {AsyncHandle} An {@link AsyncHandle} providing the ability to
	   *     cancel the asynchronous iteration (by calling `cancel()`) as well as
	   *     supply callback(s) for when an error is encountered (`onError`) or when
	   *     iteration is complete (`onComplete`).
	   */
	  AsyncSequence.prototype.each = function each(fn) {
	    var iterator = this.parent.getIterator(),
	        onNextCallback = this.onNextCallback,
	        cancelCallback = this.cancelCallback,
	        i = 0;

	    var handle = new AsyncHandle(function cancel() {
	      if (cancellationId) {
	        cancelCallback(cancellationId);
	      }
	    });

	    var cancellationId = onNextCallback(function iterate() {
	      cancellationId = null;

	      try {
	        if (iterator.moveNext() && fn(iterator.current(), i++) !== false) {
	          cancellationId = onNextCallback(iterate);

	        } else {
	          handle._resolve();
	        }

	      } catch (e) {
	        handle._reject(e);
	      }
	    });

	    return handle;
	  };

	  /**
	   * An `AsyncHandle` provides a [Promises/A+](http://promises-aplus.github.io/promises-spec/)
	   * compliant interface for an {@link AsyncSequence} that is currently (or was)
	   * iterating over its elements.
	   *
	   * In addition to behaving as a promise, an `AsyncHandle` provides the ability
	   * to {@link AsyncHandle#cancel} iteration (if `cancelFn` is provided)
	   * and also offers convenient {@link AsyncHandle#onComplete} and
	   * {@link AsyncHandle#onError} methods to attach listeners for when iteration
	   * is complete or an error is thrown during iteration.
	   *
	   * @public
	   * @param {Function} cancelFn A function to cancel asynchronous iteration.
	   *     This is passed in to support different cancellation mechanisms for
	   *     different forms of asynchronous sequences (e.g., timeout-based
	   *     sequences, sequences based on I/O, etc.).
	   * @constructor
	   *
	   * @example
	   * // Create a sequence of 100,000 random numbers, in chunks of 100.
	   * var sequence = Lazy.generate(Math.random)
	   *   .chunk(100)
	   *   .async()
	   *   .take(1000);
	   *
	   * // Reduce-style operations -- i.e., operations that return a *value* (as
	   * // opposed to a *sequence*) -- return an AsyncHandle for async sequences.
	   * var handle = sequence.toArray();
	   *
	   * handle.onComplete(function(array) {
	   *   // Do something w/ 1,000-element array.
	   * });
	   *
	   * // Since an AsyncHandle is a promise, you can also use it to create
	   * // subsequent promises using `then` (see the Promises/A+ spec for more
	   * // info).
	   * var flattened = handle.then(function(array) {
	   *   return Lazy(array).flatten();
	   * });
	   */
	  function AsyncHandle(cancelFn) {
	    this.resolveListeners = [];
	    this.rejectListeners = [];
	    this.state = PENDING;
	    this.cancelFn = cancelFn;
	  }

	  // Async handle states
	  var PENDING  = 1,
	      RESOLVED = 2,
	      REJECTED = 3;

	  AsyncHandle.prototype.then = function then(onFulfilled, onRejected) {
	    var promise = new AsyncHandle(this.cancelFn);

	    this.resolveListeners.push(function(value) {
	      try {
	        if (typeof onFulfilled !== 'function') {
	          resolve(promise, value);
	          return;
	        }

	        resolve(promise, onFulfilled(value));

	      } catch (e) {
	        promise._reject(e);
	      }
	    });

	    this.rejectListeners.push(function(reason) {
	      try {
	        if (typeof onRejected !== 'function') {
	          promise._reject(reason);
	          return;
	        }

	        resolve(promise, onRejected(reason));

	      } catch (e) {
	        promise._reject(e);
	      }
	    });

	    if (this.state === RESOLVED) {
	      this._resolve(this.value);
	    }

	    if (this.state === REJECTED) {
	      this._reject(this.reason);
	    }

	    return promise;
	  };

	  AsyncHandle.prototype._resolve = function _resolve(value) {
	    if (this.state === REJECTED) {
	      return;
	    }

	    if (this.state === PENDING) {
	      this.state = RESOLVED;
	      this.value = value;
	    }

	    consumeListeners(this.resolveListeners, this.value);
	  };

	  AsyncHandle.prototype._reject = function _reject(reason) {
	    if (this.state === RESOLVED) {
	      return;
	    }

	    if (this.state === PENDING) {
	      this.state = REJECTED;
	      this.reason = reason;
	    }

	    consumeListeners(this.rejectListeners, this.reason);
	  };

	  /**
	   * Cancels asynchronous iteration.
	   *
	   * @public
	   */
	  AsyncHandle.prototype.cancel = function cancel() {
	    if (this.cancelFn) {
	      this.cancelFn();
	      this.cancelFn = null;
	      this._resolve(false);
	    }
	  };

	  /**
	   * Updates the handle with a callback to execute when iteration is completed.
	   *
	   * @public
	   * @param {Function} callback The function to call when the asynchronous
	   *     iteration is completed.
	   * @return {AsyncHandle} A reference to the handle (for chaining).
	   */
	  AsyncHandle.prototype.onComplete = function onComplete(callback) {
	    this.resolveListeners.push(callback);
	    return this;
	  };

	  /**
	   * Updates the handle with a callback to execute if/when any error is
	   * encountered during asynchronous iteration.
	   *
	   * @public
	   * @param {Function} callback The function to call, with any associated error
	   *     object, when an error occurs.
	   * @return {AsyncHandle} A reference to the handle (for chaining).
	   */
	  AsyncHandle.prototype.onError = function onError(callback) {
	    this.rejectListeners.push(callback);
	    return this;
	  };

	  /**
	   * Promise resolution procedure:
	   * http://promises-aplus.github.io/promises-spec/#the_promise_resolution_procedure
	   */
	  function resolve(promise, x) {
	    if (promise === x) {
	      promise._reject(new TypeError('Cannot resolve a promise to itself'));
	      return;
	    }

	    if (x instanceof AsyncHandle) {
	      x.then(
	        function(value) { resolve(promise, value); },
	        function(reason) { promise._reject(reason); }
	      );
	      return;
	    }

	    var then;
	    try {
	      then = (/function|object/).test(typeof x) && x != null && x.then;
	    } catch (e) {
	      promise._reject(e);
	      return;
	    }

	    var thenableState = PENDING;
	    if (typeof then === 'function') {
	      try {
	        then.call(
	          x,
	          function resolvePromise(value) {
	            if (thenableState !== PENDING) {
	              return;
	            }
	            thenableState = RESOLVED;
	            resolve(promise, value);
	          },
	          function rejectPromise(reason) {
	            if (thenableState !== PENDING) {
	              return;
	            }
	            thenableState = REJECTED;
	            promise._reject(reason);
	          }
	        );
	      } catch (e) {
	        if (thenableState !== PENDING) {
	          return;
	        }

	        promise._reject(e);
	      }

	      return;
	    }

	    promise._resolve(x);
	  }

	  function consumeListeners(listeners, value, callback) {
	    callback || (callback = getOnNextCallback());

	    callback(function() {
	      if (listeners.length > 0) {
	        listeners.shift()(value);
	        consumeListeners(listeners, value, callback);
	      }
	    });
	  }

	  function getOnNextCallback(interval) {
	    if (typeof interval === "undefined") {
	      if (typeof setImmediate === "function") {
	        return setImmediate;
	      }
	    }

	    interval = interval || 0;
	    return function(fn) {
	      return setTimeout(fn, interval);
	    };
	  }

	  function getCancelCallback(interval) {
	    if (typeof interval === "undefined") {
	      if (typeof clearImmediate === "function") {
	        return clearImmediate;
	      }
	    }

	    return clearTimeout;
	  }

	  /**
	   * Transform a value, whether the value is retrieved asynchronously or directly.
	   *
	   * @private
	   * @param {Function} fn The function that transforms the value.
	   * @param {*} value The value to be transformed. This can be an {@link AsyncHandle} when the value
	   *     is retrieved asynchronously, otherwise it can be anything.
	   * @returns {*} An {@link AsyncHandle} when `value` is also an {@link AsyncHandle}, otherwise
	   *     whatever `fn` resulted in.
	   */
	  function transform(fn, value) {
	    if (value instanceof AsyncHandle) {
	      return value.then(function() { fn(value); });
	    }
	    return fn(value);
	  }

	  /**
	   * An async version of {@link Sequence#reverse}.
	   */
	  AsyncSequence.prototype.reverse = function reverse() {
	    return this.parent.reverse().async();
	  };

	  /**
	   * A version of {@link Sequence#find} which returns an {@link AsyncHandle}.
	   *
	   * @public
	   * @param {Function} predicate A function to call on (potentially) every element
	   *     in the sequence.
	   * @returns {AsyncHandle} An {@link AsyncHandle} (promise) which resolves to
	   *     the found element, once it is detected, or else `undefined`.
	   */
	  AsyncSequence.prototype.find = function find(predicate) {
	    var found;

	    var handle = this.each(function(e, i) {
	      if (predicate(e, i)) {
	        found = e;
	        return false;
	      }
	    });

	    return handle.then(function() { return found; });
	  };

	  /**
	   * A version of {@link Sequence#indexOf} which returns an {@link AsyncHandle}.
	   *
	   * @public
	   * @param {*} value The element to search for in the sequence.
	   * @returns {AsyncHandle} An {@link AsyncHandle} (promise) which resolves to
	   *     the found index, once it is detected, or -1.
	   */
	  AsyncSequence.prototype.indexOf = function indexOf(value) {
	    var foundIndex = -1;

	    var handle = this.each(function(e, i) {
	      if (e === value) {
	        foundIndex = i;
	        return false;
	      }
	    });

	    return handle.then(function() {
	      return foundIndex;
	    });
	  };

	  /**
	   * A version of {@link Sequence#contains} which returns an {@link AsyncHandle}.
	   *
	   * @public
	   * @param {*} value The element to search for in the sequence.
	   * @returns {AsyncHandle} An {@link AsyncHandle} (promise) which resolves to
	   *     either `true` or `false` to indicate whether the element was found.
	   */
	  AsyncSequence.prototype.contains = function contains(value) {
	    var found = false;

	    var handle = this.each(function(e) {
	      if (e === value) {
	        found = true;
	        return false;
	      }
	    });

	    return handle.then(function() {
	      return found;
	    });
	  };

	  /**
	   * Just return the same sequence for `AsyncSequence#async` (I see no harm in this).
	   */
	  AsyncSequence.prototype.async = function async() {
	    return this;
	  };

	  /**
	   * See {@link ObjectLikeSequence#watch} for docs.
	   */
	  ObjectWrapper.prototype.watch = function watch(propertyNames) {
	    return new WatchedPropertySequence(this.source, propertyNames);
	  };

	  function WatchedPropertySequence(object, propertyNames) {
	    this.listeners = [];

	    if (!propertyNames) {
	      propertyNames = Lazy(object).keys().toArray();
	    } else if (!(propertyNames instanceof Array)) {
	      propertyNames = [propertyNames];
	    }

	    var listeners = this.listeners,
	        index     = 0;

	    Lazy(propertyNames).each(function(propertyName) {
	      var propertyValue = object[propertyName];

	      Object.defineProperty(object, propertyName, {
	        get: function() {
	          return propertyValue;
	        },

	        set: function(value) {
	          for (var i = listeners.length - 1; i >= 0; --i) {
	            if (listeners[i]({ property: propertyName, value: value }, index) === false) {
	              listeners.splice(i, 1);
	            }
	          }
	          propertyValue = value;
	          ++index;
	        }
	      });
	    });
	  }

	  WatchedPropertySequence.prototype = new AsyncSequence();

	  WatchedPropertySequence.prototype.each = function each(fn) {
	    this.listeners.push(fn);
	  };

	  /**
	   * A StreamLikeSequence comprises a sequence of 'chunks' of data, which are
	   * typically multiline strings.
	   *
	   * @constructor
	   */
	  function StreamLikeSequence() {}

	  StreamLikeSequence.prototype = new AsyncSequence();

	  StreamLikeSequence.prototype.isAsync = function isAsync() {
	    return true;
	  };

	  StreamLikeSequence.prototype.split = function split(delimiter) {
	    return new SplitStreamSequence(this, delimiter);
	  };

	  /**
	   * @constructor
	   */
	  function SplitStreamSequence(parent, delimiter) {
	    this.parent    = parent;
	    this.delimiter = delimiter;
	    this.each      = this.getEachForDelimiter(delimiter);
	  }

	  SplitStreamSequence.prototype = new Sequence();

	  SplitStreamSequence.prototype.getEachForDelimiter = function getEachForDelimiter(delimiter) {
	    if (delimiter instanceof RegExp) {
	      return this.regexEach;
	    }

	    return this.stringEach;
	  };

	  SplitStreamSequence.prototype.regexEach = function each(fn) {
	    var delimiter = cloneRegex(this.delimiter),
	        buffer = '',
	        start = 0, end,
	        index = 0;

	    var handle = this.parent.each(function(chunk) {
	      buffer += chunk;

	      var match;
	      while (match = delimiter.exec(buffer)) {
	        end = match.index;
	        if (fn(buffer.substring(start, end), index++) === false) {
	          return false;
	        }
	        start = end + match[0].length;
	      }

	      buffer = buffer.substring(start);
	      start = 0;
	    });

	    handle.onComplete(function() {
	      if (buffer.length > 0) {
	        fn(buffer, index++);
	      }
	    });

	    return handle;
	  };

	  SplitStreamSequence.prototype.stringEach = function each(fn) {
	    var delimiter  = this.delimiter,
	        pieceIndex = 0,
	        buffer = '',
	        bufferIndex = 0;

	    var handle = this.parent.each(function(chunk) {
	      buffer += chunk;
	      var delimiterIndex;
	      while ((delimiterIndex = buffer.indexOf(delimiter)) >= 0) {
	        var piece = buffer.substr(0,delimiterIndex);
	        buffer = buffer.substr(delimiterIndex+delimiter.length);
	        if (fn(piece,pieceIndex++) === false) {
	          return false;
	        }
	      }
	      return true;
	    });

	    handle.onComplete(function() {
	      fn(buffer, pieceIndex++);
	    });

	    return handle;
	  };

	  StreamLikeSequence.prototype.lines = function lines() {
	    return this.split("\n");
	  };

	  StreamLikeSequence.prototype.match = function match(pattern) {
	    return new MatchedStreamSequence(this, pattern);
	  };

	  /**
	   * @constructor
	   */
	  function MatchedStreamSequence(parent, pattern) {
	    this.parent  = parent;
	    this.pattern = cloneRegex(pattern);
	  }

	  MatchedStreamSequence.prototype = new AsyncSequence();

	  MatchedStreamSequence.prototype.each = function each(fn) {
	    var pattern = this.pattern,
	        done      = false,
	        i         = 0;

	    return this.parent.each(function(chunk) {
	      Lazy(chunk).match(pattern).each(function(match) {
	        if (fn(match, i++) === false) {
	          done = true;
	          return false;
	        }
	      });

	      return !done;
	    });
	  };

	  /**
	   * Defines a wrapper for custom {@link StreamLikeSequence}s. This is useful
	   * if you want a way to handle a stream of events as a sequence, but you can't
	   * use Lazy's existing interface (i.e., you're wrapping an object from a
	   * library with its own custom events).
	   *
	   * This method defines a *factory*: that is, it produces a function that can
	   * be used to wrap objects and return a {@link Sequence}. Hopefully the
	   * example will make this clear.
	   *
	   * @public
	   * @param {Function} initializer An initialization function called on objects
	   *     created by this factory. `this` will be bound to the created object,
	   *     which is an instance of {@link StreamLikeSequence}. Use `emit` to
	   *     generate data for the sequence.
	   * @returns {Function} A function that creates a new {@link StreamLikeSequence},
	   *     initializes it using the specified function, and returns it.
	   *
	   * @example
	   * var factory = Lazy.createWrapper(function(eventSource) {
	   *   var sequence = this;
	   *
	   *   eventSource.handleEvent(function(data) {
	   *     sequence.emit(data);
	   *   });
	   * });
	   *
	   * var eventEmitter = {
	   *   triggerEvent: function(data) {
	   *     eventEmitter.eventHandler(data);
	   *   },
	   *   handleEvent: function(handler) {
	   *     eventEmitter.eventHandler = handler;
	   *   },
	   *   eventHandler: function() {}
	   * };
	   *
	   * var events = [];
	   *
	   * factory(eventEmitter).each(function(e) {
	   *   events.push(e);
	   * });
	   *
	   * eventEmitter.triggerEvent('foo');
	   * eventEmitter.triggerEvent('bar');
	   *
	   * events // => ['foo', 'bar']
	   */
	  Lazy.createWrapper = function createWrapper(initializer) {
	    var ctor = function() {
	      this.listeners = [];
	    };

	    ctor.prototype = new StreamLikeSequence();

	    ctor.prototype.each = function(listener) {
	      this.listeners.push(listener);
	    };

	    ctor.prototype.emit = function(data) {
	      var listeners = this.listeners;

	      for (var len = listeners.length, i = len - 1; i >= 0; --i) {
	        if (listeners[i](data) === false) {
	          listeners.splice(i, 1);
	        }
	      }
	    };

	    return function() {
	      var sequence = new ctor();
	      initializer.apply(sequence, arguments);
	      return sequence;
	    };
	  };

	  /**
	   * Creates a {@link GeneratedSequence} using the specified generator function
	   * and (optionally) length.
	   *
	   * @public
	   * @param {function(number):*} generatorFn The function used to generate the
	   *     sequence. This function accepts an index as a parameter and should return
	   *     a value for that index in the resulting sequence.
	   * @param {number=} length The length of the sequence, for sequences with a
	   *     definite length.
	   * @returns {GeneratedSequence} The generated sequence.
	   *
	   * @examples
	   * var randomNumbers = Lazy.generate(Math.random);
	   * var countingNumbers = Lazy.generate(function(i) { return i + 1; }, 5);
	   *
	   * randomNumbers          // instanceof Lazy.GeneratedSequence
	   * randomNumbers.length() // => undefined
	   * countingNumbers          // sequence: [1, 2, 3, 4, 5]
	   * countingNumbers.length() // => 5
	   */
	  Lazy.generate = function generate(generatorFn, length) {
	    return new GeneratedSequence(generatorFn, length);
	  };

	  /**
	   * Creates a sequence from a given starting value, up to a specified stopping
	   * value, incrementing by a given step. Invalid values for any of these
	   * arguments (e.g., a step of 0) result in an empty sequence.
	   *
	   * @public
	   * @returns {GeneratedSequence} The sequence defined by the given ranges.
	   *
	   * @examples
	   * Lazy.range(3)         // sequence: [0, 1, 2]
	   * Lazy.range(1, 4)      // sequence: [1, 2, 3]
	   * Lazy.range(2, 10, 2)  // sequence: [2, 4, 6, 8]
	   * Lazy.range(5, 1, 2)   // sequence: []
	   * Lazy.range(5, 15, -2) // sequence: []
	   * Lazy.range(3, 10, 3)  // sequence: [3, 6, 9]
	   * Lazy.range(5, 2)      // sequence: [5, 4, 3]
	   * Lazy.range(7, 2, -2)  // sequence: [7, 5, 3]
	   * Lazy.range(3, 5, 0)   // sequence: []
	   */
	  Lazy.range = function range() {
	    var start = arguments.length > 1 ? arguments[0] : 0,
	        stop  = arguments.length > 1 ? arguments[1] : arguments[0],
	        step  = arguments.length > 2 && arguments[2];

	    if (step === false) {
	      step = stop > start ? 1 : -1;
	    }

	    if (step === 0) {
	      return Lazy([]);
	    }

	    return Lazy.generate(function(i) { return start + (step * i); })
	      .take(Math.ceil((stop - start) / step));
	  };

	  /**
	   * Creates a sequence consisting of the given value repeated a specified number
	   * of times.
	   *
	   * @public
	   * @param {*} value The value to repeat.
	   * @param {number=} count The number of times the value should be repeated in
	   *     the sequence. If this argument is omitted, the value will repeat forever.
	   * @returns {GeneratedSequence} The sequence containing the repeated value.
	   *
	   * @examples
	   * Lazy.repeat("hi", 3)          // sequence: ["hi", "hi", "hi"]
	   * Lazy.repeat("young")          // instanceof Lazy.GeneratedSequence
	   * Lazy.repeat("young").length() // => undefined
	   * Lazy.repeat("young").take(3)  // sequence: ["young", "young", "young"]
	   */
	  Lazy.repeat = function repeat(value, count) {
	    return Lazy.generate(function() { return value; }, count);
	  };

	  Lazy.Sequence           = Sequence;
	  Lazy.ArrayLikeSequence  = ArrayLikeSequence;
	  Lazy.ObjectLikeSequence = ObjectLikeSequence;
	  Lazy.StringLikeSequence = StringLikeSequence;
	  Lazy.StreamLikeSequence = StreamLikeSequence;
	  Lazy.GeneratedSequence  = GeneratedSequence;
	  Lazy.AsyncSequence      = AsyncSequence;
	  Lazy.AsyncHandle        = AsyncHandle;

	  /*** Useful utility methods ***/

	  /**
	   * Creates a shallow copy of an array or object.
	   *
	   * @examples
	   * var array  = [1, 2, 3], clonedArray,
	   *     object = { foo: 1, bar: 2 }, clonedObject;
	   *
	   * clonedArray = Lazy.clone(array); // => [1, 2, 3]
	   * clonedArray.push(4); // clonedArray == [1, 2, 3, 4]
	   * array; // => [1, 2, 3]
	   *
	   * clonedObject = Lazy.clone(object); // => { foo: 1, bar: 2 }
	   * clonedObject.baz = 3; // clonedObject == { foo: 1, bar: 2, baz: 3 }
	   * object; // => { foo: 1, bar: 2 }
	   */
	  Lazy.clone = function clone(target) {
	    return Lazy(target).value();
	  };

	  /**
	   * Marks a method as deprecated, so calling it will issue a console warning.
	   */
	  Lazy.deprecate = function deprecate(message, fn) {
	    return function() {
	      console.warn(message);
	      return fn.apply(this, arguments);
	    };
	  };

	  var arrayPop   = Array.prototype.pop,
	      arraySlice = Array.prototype.slice;

	  /**
	   * Creates a callback... you know, Lo-Dash style.
	   *
	   * - for functions, just returns the function
	   * - for strings, returns a pluck-style callback
	   * - for objects, returns a where-style callback
	   *
	   * @private
	   * @param {Function|string|Object} callback A function, string, or object to
	   *     convert to a callback.
	   * @param {*} defaultReturn If the callback is undefined, a default return
	   *     value to use for the function.
	   * @returns {Function} The callback function.
	   *
	   * @examples
	   * createCallback(function() {})                  // instanceof Function
	   * createCallback('foo')                          // instanceof Function
	   * createCallback('foo')({ foo: 'bar'})           // => 'bar'
	   * createCallback({ foo: 'bar' })({ foo: 'bar' }) // => true
	   * createCallback({ foo: 'bar' })({ foo: 'baz' }) // => false
	   */
	  function createCallback(callback, defaultValue) {
	    switch (typeof callback) {
	      case "function":
	        return callback;

	      case "string":
	        return function(e) {
	          return e[callback];
	        };

	      case "object":
	        return function(e) {
	          return Lazy(callback).all(function(value, key) {
	            return e[key] === value;
	          });
	        };

	      case "undefined":
	        return defaultValue ?
	          function() { return defaultValue; } :
	          Lazy.identity;

	      default:
	        throw new Error("Don't know how to make a callback from a " + typeof callback + "!");
	    }
	  }

	  /**
	   * Takes a function that returns a value for one argument and produces a
	   * function that compares two arguments.
	   *
	   * @private
	   * @param {Function|string|Object} callback A function, string, or object to
	   *     convert to a callback using `createCallback`.
	   * @returns {Function} A function that accepts two values and returns 1 if
	   *     the first is greater, -1 if the second is greater, or 0 if they are
	   *     equivalent.
	   *
	   * @examples
	   * createComparator('a')({ a: 1 }, { a: 2 });       // => -1
	   * createComparator('a')({ a: 6 }, { a: 2 });       // => 1
	   * createComparator('a')({ a: 1 }, { a: 1 });       // => 0
	   * createComparator()(3, 5);                        // => -1
	   * createComparator()(7, 5);                        // => 1
	   * createComparator()(3, 3);                        // => 0
	   */
	  function createComparator(callback, descending) {
	    if (!callback) { return compare; }

	    callback = createCallback(callback);

	    return function(x, y) {
	      return compare(callback(x), callback(y));
	    };
	  }

	  /**
	   * Takes a function and returns a function with the same logic but the
	   * arguments reversed. Only applies to functions w/ arity=2 as this is private
	   * and I can do what I want.
	   *
	   * @private
	   * @param {Function} fn The function to "reverse"
	   * @returns {Function} The "reversed" function
	   *
	   * @examples
	   * reverseArguments(function(x, y) { return x + y; })('a', 'b'); // => 'ba'
	   */
	  function reverseArguments(fn) {
	    return function(x, y) { return fn(y, x); };
	  }

	  /**
	   * Creates a Set containing the specified values.
	   *
	   * @param {...Array} values One or more array(s) of values used to populate the
	   *     set.
	   * @returns {Set} A new set containing the values passed in.
	   */
	  function createSet(values) {
	    var set = new Set();
	    Lazy(values || []).flatten().each(function(e) {
	      set.add(e);
	    });
	    return set;
	  }

	  /**
	   * Compares two elements for sorting purposes.
	   *
	   * @private
	   * @param {*} x The left element to compare.
	   * @param {*} y The right element to compare.
	   * @returns {number} 1 if x > y, -1 if x < y, or 0 if x and y are equal.
	   *
	   * @examples
	   * compare(1, 2)     // => -1
	   * compare(1, 1)     // => 0
	   * compare(2, 1)     // => 1
	   * compare('a', 'b') // => -1
	   */
	  function compare(x, y) {
	    if (x === y) {
	      return 0;
	    }

	    return x > y ? 1 : -1;
	  }

	  /**
	   * Iterates over every element in an array.
	   *
	   * @param {Array} array The array.
	   * @param {Function} fn The function to call on every element, which can return
	   *     false to stop the iteration early.
	   * @returns {boolean} True if every element in the entire sequence was iterated,
	   *     otherwise false.
	   */
	  function forEach(array, fn) {
	    var i = -1,
	        len = array.length;

	    while (++i < len) {
	      if (fn(array[i], i) === false) {
	        return false;
	      }
	    }

	    return true;
	  }

	  function getFirst(sequence) {
	    var result;
	    sequence.each(function(e) {
	      result = e;
	      return false;
	    });
	    return result;
	  }

	  /**
	   * Checks if an element exists in an array.
	   *
	   * @private
	   * @param {Array} array
	   * @param {*} element
	   * @returns {boolean} Whether or not the element exists in the array.
	   *
	   * @examples
	   * arrayContains([1, 2], 2)              // => true
	   * arrayContains([1, 2], 3)              // => false
	   * arrayContains([undefined], undefined) // => true
	   * arrayContains([NaN], NaN)             // => true
	   */
	  function arrayContains(array, element) {
	    var i = -1,
	        length = array.length;

	    // Special handling for NaN
	    if (element !== element) {
	      while (++i < length) {
	        if (array[i] !== array[i]) {
	          return true;
	        }
	      }
	      return false;
	    }

	    while (++i < length) {
	      if (array[i] === element) {
	        return true;
	      }
	    }
	    return false;
	  }

	  /**
	   * Checks if an element exists in an array before a given index.
	   *
	   * @private
	   * @param {Array} array
	   * @param {*} element
	   * @param {number} index
	   * @param {Function} keyFn
	   * @returns {boolean}
	   *
	   * @examples
	   * arrayContainsBefore([1, 2, 3], 3, 2) // => false
	   * arrayContainsBefore([1, 2, 3], 3, 3) // => true
	   */
	  function arrayContainsBefore(array, element, index, keyFn) {
	    var i = -1;

	    if (keyFn) {
	      keyFn = createCallback(keyFn);
	      while (++i < index) {
	        if (keyFn(array[i]) === keyFn(element)) {
	          return true;
	        }
	      }

	    } else {
	      while (++i < index) {
	        if (array[i] === element) {
	          return true;
	        }
	      }
	    }

	    return false;
	  }

	  /**
	   * Swaps the elements at two specified positions of an array.
	   *
	   * @private
	   * @param {Array} array
	   * @param {number} i
	   * @param {number} j
	   *
	   * @examples
	   * var array = [1, 2, 3, 4, 5];
	   *
	   * swap(array, 2, 3) // array == [1, 2, 4, 3, 5]
	   */
	  function swap(array, i, j) {
	    var temp = array[i];
	    array[i] = array[j];
	    array[j] = temp;
	  }

	  /**
	   * "Clones" a regular expression (but makes it always global).
	   *
	   * @private
	   * @param {RegExp|string} pattern
	   * @returns {RegExp}
	   */
	  function cloneRegex(pattern) {
	    return eval("" + pattern + (!pattern.global ? "g" : ""));
	  };

	  /**
	   * A collection of unique elements.
	   *
	   * @private
	   * @constructor
	   *
	   * @examples
	   * var set  = new Set(),
	   *     obj1 = {},
	   *     obj2 = {},
	   *     fn1 = function fn1() {},
	   *     fn2 = function fn2() {};
	   *
	   * set.add('foo')            // => true
	   * set.add('foo')            // => false
	   * set.add(1)                // => true
	   * set.add(1)                // => false
	   * set.add('1')              // => true
	   * set.add('1')              // => false
	   * set.add(obj1)             // => true
	   * set.add(obj1)             // => false
	   * set.add(obj2)             // => true
	   * set.add(fn1)              // => true
	   * set.add(fn2)              // => true
	   * set.add(fn2)              // => false
	   * set.contains('__proto__') // => false
	   * set.add('__proto__')      // => true
	   * set.add('__proto__')      // => false
	   * set.contains('add')       // => false
	   * set.add('add')            // => true
	   * set.add('add')            // => false
	   * set.contains(undefined)   // => false
	   * set.add(undefined)        // => true
	   * set.contains(undefined)   // => true
	   * set.contains('undefined') // => false
	   * set.add('undefined')      // => true
	   * set.contains('undefined') // => true
	   * set.contains(NaN)         // => false
	   * set.add(NaN)              // => true
	   * set.contains(NaN)         // => true
	   * set.contains('NaN')       // => false
	   * set.add('NaN')            // => true
	   * set.contains('NaN')       // => true
	   * set.contains('@foo')      // => false
	   * set.add('@foo')           // => true
	   * set.contains('@foo')      // => true
	   */
	  function Set() {
	    this.table   = {};
	    this.objects = [];
	  }

	  /**
	   * Attempts to add a unique value to the set.
	   *
	   * @param {*} value The value to add.
	   * @returns {boolean} True if the value was added to the set (meaning an equal
	   *     value was not already present), or else false.
	   */
	  Set.prototype.add = function add(value) {
	    var table = this.table,
	        type  = typeof value,

	        // only applies for strings
	        firstChar,

	        // only applies for objects
	        objects;

	    switch (type) {
	      case "number":
	      case "boolean":
	      case "undefined":
	        if (!table[value]) {
	          table[value] = true;
	          return true;
	        }
	        return false;

	      case "string":
	        // Essentially, escape the first character if it could possibly collide
	        // with a number, boolean, or undefined (or a string that happens to start
	        // with the escape character!), OR if it could override a special property
	        // such as '__proto__' or 'constructor'.
	        switch (value.charAt(0)) {
	          case "_": // e.g., __proto__
	          case "f": // for 'false'
	          case "t": // for 'true'
	          case "c": // for 'constructor'
	          case "u": // for 'undefined'
	          case "@": // escaped
	          case "0":
	          case "1":
	          case "2":
	          case "3":
	          case "4":
	          case "5":
	          case "6":
	          case "7":
	          case "8":
	          case "9":
	          case "N": // for NaN
	            value = "@" + value;
	        }
	        if (!table[value]) {
	          table[value] = true;
	          return true;
	        }
	        return false;

	      default:
	        // For objects and functions, we can't really do anything other than store
	        // them in an array and do a linear search for reference equality.
	        objects = this.objects;
	        if (!arrayContains(objects, value)) {
	          objects.push(value);
	          return true;
	        }
	        return false;
	    }
	  };

	  /**
	   * Checks whether the set contains a value.
	   *
	   * @param {*} value The value to check for.
	   * @returns {boolean} True if the set contains the value, or else false.
	   */
	  Set.prototype.contains = function contains(value) {
	    var type = typeof value,

	        // only applies for strings
	        firstChar;

	    switch (type) {
	      case "number":
	      case "boolean":
	      case "undefined":
	        return !!this.table[value];

	      case "string":
	        // Essentially, escape the first character if it could possibly collide
	        // with a number, boolean, or undefined (or a string that happens to start
	        // with the escape character!), OR if it could override a special property
	        // such as '__proto__' or 'constructor'.
	        switch (value.charAt(0)) {
	          case "_": // e.g., __proto__
	          case "f": // for 'false'
	          case "t": // for 'true'
	          case "c": // for 'constructor'
	          case "u": // for 'undefined'
	          case "@": // escaped
	          case "0":
	          case "1":
	          case "2":
	          case "3":
	          case "4":
	          case "5":
	          case "6":
	          case "7":
	          case "8":
	          case "9":
	          case "N": // for NaN
	            value = "@" + value;
	        }
	        return !!this.table[value];

	      default:
	        // For objects and functions, we can't really do anything other than store
	        // them in an array and do a linear search for reference equality.
	        return arrayContains(this.objects, value);
	    }
	  };

	  /**
	   * A "rolling" queue, with a fixed capacity. As items are added to the head,
	   * excess items are dropped from the tail.
	   *
	   * @private
	   * @constructor
	   *
	   * @examples
	   * var queue = new Queue(3);
	   *
	   * queue.add(1).toArray()        // => [1]
	   * queue.add(2).toArray()        // => [1, 2]
	   * queue.add(3).toArray()        // => [1, 2, 3]
	   * queue.add(4).toArray()        // => [2, 3, 4]
	   * queue.add(5).add(6).toArray() // => [4, 5, 6]
	   * queue.add(7).add(8).toArray() // => [6, 7, 8]
	   *
	   * // also want to check corner cases
	   * new Queue(1).add('foo').add('bar').toArray() // => ['bar']
	   * new Queue(0).add('foo').toArray()            // => []
	   * new Queue(-1)                                // throws
	   *
	   * @benchmarks
	   * function populateQueue(count, capacity) {
	   *   var q = new Queue(capacity);
	   *   for (var i = 0; i < count; ++i) {
	   *     q.add(i);
	   *   }
	   * }
	   *
	   * function populateArray(count, capacity) {
	   *   var arr = [];
	   *   for (var i = 0; i < count; ++i) {
	   *     if (arr.length === capacity) { arr.shift(); }
	   *     arr.push(i);
	   *   }
	   * }
	   *
	   * populateQueue(100, 10); // populating a Queue
	   * populateArray(100, 10); // populating an Array
	   */
	  function Queue(capacity) {
	    this.contents = new Array(capacity);
	    this.start    = 0;
	    this.count    = 0;
	  }

	  /**
	   * Adds an item to the queue, and returns the queue.
	   */
	  Queue.prototype.add = function add(element) {
	    var contents = this.contents,
	        capacity = contents.length,
	        start    = this.start;

	    if (this.count === capacity) {
	      contents[start] = element;
	      this.start = (start + 1) % capacity;

	    } else {
	      contents[this.count++] = element;
	    }

	    return this;
	  };

	  /**
	   * Returns an array containing snapshot of the queue's contents.
	   */
	  Queue.prototype.toArray = function toArray() {
	    var contents = this.contents,
	        start    = this.start,
	        count    = this.count;

	    var snapshot = contents.slice(start, start + count);
	    if (snapshot.length < count) {
	      snapshot = snapshot.concat(contents.slice(0, count - snapshot.length));
	    }

	    return snapshot;
	  };

	  /**
	   * Shared base method for defining new sequence types.
	   */
	  function defineSequenceType(base, name, overrides) {
	    /** @constructor */
	    var ctor = function ctor() {};

	    // Make this type inherit from the specified base.
	    ctor.prototype = new base();

	    // Attach overrides to the new sequence type's prototype.
	    for (var override in overrides) {
	      ctor.prototype[override] = overrides[override];
	    }

	    // Define a factory method that sets the new sequence's parent to the caller
	    // and (optionally) applies any additional initialization logic.
	    // Expose this as a chainable method so that we can do:
	    // Lazy(...).map(...).filter(...).blah(...);
	    var factory = function factory() {
	      var sequence = new ctor();

	      // Every sequence needs a reference to its parent in order to work.
	      sequence.parent = this;

	      // If a custom init function was supplied, call it now.
	      if (sequence.init) {
	        sequence.init.apply(sequence, arguments);
	      }

	      return sequence;
	    };

	    var methodNames = typeof name === 'string' ? [name] : name;
	    for (var i = 0; i < methodNames.length; ++i) {
	      base.prototype[methodNames[i]] = factory;
	    }

	    return ctor;
	  }

	  return Lazy;
	});

	/* WEBPACK VAR INJECTION */}.call(exports, __webpack_require__(227).setImmediate, __webpack_require__(227).clearImmediate))

/***/ },
/* 257 */
/***/ function(module, exports, __webpack_require__) {

	'use strict';

	var _keys = __webpack_require__(243);

	var _keys2 = _interopRequireDefault(_keys);

	var _classCallCheck2 = __webpack_require__(56);

	var _classCallCheck3 = _interopRequireDefault(_classCallCheck2);

	var _createClass2 = __webpack_require__(57);

	var _createClass3 = _interopRequireDefault(_createClass2);

	function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

	var EventIndex = function () {
	  function EventIndex() {
	    (0, _classCallCheck3.default)(this, EventIndex);

	    this._index = {};
	  }

	  (0, _createClass3.default)(EventIndex, [{
	    key: 'get',
	    value: function get() {
	      var _this = this;

	      return (0, _keys2.default)(this._index).map(function (f) {
	        return _this._index[f];
	      });
	    }
	  }, {
	    key: 'updateIndex',
	    value: function updateIndex(oplog, updated) {
	      var _this2 = this;

	      var handled = [];

	      updated.forEach(function (item) {
	        if (handled.indexOf(item.key) === -1) {
	          handled.push(item.key);
	          if (item.op === 'ADD') {
	            _this2._index[item.key] = item;
	          } else if (item.op === 'DELETE') {
	            delete _this2._index[item.key];
	          }
	        }
	      });
	    }
	  }]);
	  return EventIndex;
	}();

	module.exports = EventIndex;

/***/ }
/******/ ]);