9e216da9ef
After go1.16, go will use module mode by default, even when the repository is checked out under GOPATH or in a one-off directory. Add go.mod, go.sum to keep this repo buildable without opting out of the module mode. > go mod init github.com/mmcgrana/gobyexample > go mod tidy > go mod vendor In module mode, the 'vendor' directory is special and its contents will be actively maintained by the go command. pygments aren't the dependency the go will know about, so it will delete the contents from vendor directory. Move it to `third_party` directory now. And, vendor the blackfriday package. Note: the tutorial contents are not affected by the change in go1.16 because all the examples in this tutorial ask users to run the go command with the explicit list of files to be compiled (e.g. `go run hello-world.go` or `go build command-line-arguments.go`). When the source list is provided, the go command does not have to compute the build list and whether it's running in GOPATH mode or module mode becomes irrelevant.
129 lines
2.5 KiB
Plaintext
129 lines
2.5 KiB
Plaintext
class Person {
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def initialize: @name age: @age {
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"""
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This is a docstring for the Person constructor method.
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Docstrings usually are multi-line, like this one.
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"""
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}
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def to_s {
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# return is optional in this case, but we use it nontheless
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return "Person with name: #{@name inspect} and age: #{@age}"
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}
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}
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class PersonWithCity : Person {
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def initialize: @name age: @age city: @city {
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}
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def to_s {
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super to_s ++ " living in: #{@city inspect}"
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}
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}
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p1 = Person new: "Johnny Jackson" age: 42
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p1 println # prints: Person with name: "Johnny Jackson" and age: 42
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p2 = PersonWithCity new: "John Appleseed" age: 55 city: "New York"
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p2 println # prints: Person with name: "John Appleseed" age: 55 living in: "New York"
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array = [1,2,3, "foo", 'bar]
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hash = <['foo => "bar", 'bar => 42]>
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tuple = (1,2,"hello","world")
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block = |x, y| {
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x + y println
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}
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block call: [4,2]
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0b010101 & 0b00101 to_s: 2 . println
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0xFF & 0xAB to_s: 16 . println
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0o77 > 0o76 println
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123.123 + 0.222 println
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x = 0
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try {
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10 / x println
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} catch ZeroDivisionError => e {
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x = 3
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retry
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} finally {
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"Finally, done!" println
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}
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def a_method: arg1 with_default_arg: arg2 (42) {
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arg1 * arg2 println
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}
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a_method: 42
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a_method: 42 with_default_arg: 85
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class ClassWithClassMethod {
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def self class_method1 {
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'works
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}
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def ClassWithClassMethod class_method2 {
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'this_as_well
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}
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}
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ClassWithClassMethod class_method1 println
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ClassWithClassMethod class_method2 println
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def another_method: block {
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1 upto: 10 . map: block
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}
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# local returns
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another_method: |x| { return_local x * 2 } . inspect println
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# pattern matching:
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class PatternMatching {
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def match_it: obj {
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match obj {
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case String -> "It's a String!" println
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case Fixnum -> "It's a Number!" println
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case _ -> "Aything else!" println
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}
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}
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def match_with_extract: str {
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match str {
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# m holds the MatchData object, m1 & m2 the first and second matches
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case /^(.*) : (.*)$/ -> |m, m1, m2|
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"First match: #{m1}" println
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"Second match: #{m2}" println
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}
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}
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}
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pm = PatternMatching new
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pm match_it: "foo"
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pm match_it: 42
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pm match_it: 'foo
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pm match_with_extract: "Hello : World!"
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# calling ruby methods:
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[3, 2, 1] reverse() each() |a| { puts(a) }
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"Hello" sub("ll", "y") println
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[3, 2, 1] map() |a| { a * 2 } inject(0) |s i| { s + i } println
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# test symbol highlighting
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['foo]
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['foo?!]
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{'foo}
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{'foo!?}
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{'foo:bar?!=&/:}
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('foo)
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# future sends
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42 @ to_s class println
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42 @ to_s: 16 . value println
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# async sends
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42 @@ println
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42 @@ upto: 100
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