Merge pull request #194 from mmcgrana/explain-nonblocking-send

Explain non-blocking sends

examples/non-blocking-channel-operations/non-blocking-channel-operations.go

@@ -22,7 +22,10 @@ func main() {
         fmt.Println("no message received")
     }
 
-    // A non-blocking send works similarly.
+    // A non-blocking send works similarly. Here `msg`
+    // cannot be sent to the `messages` channel, because
+    // the channel has no buffer and there is no receiver.
+    // Therefore the `default` case is selected.
     msg := "hi"
     select {
     case messages <- msg:

examples/non-blocking-channel-operations/non-blocking-channel-operations.hash

@@ -1,2 +1,2 @@
-119ced4df4f79795b163483b6abfd855e76ef577
+a6e0a8bb87153c7ed0de4996172f7ad5d89c6814
-M972dltae2
+n5ttmOsMrrJ

public/non-blocking-channel-operations

@@ -42,7 +42,7 @@ non-blocking multi-way <code>select</code>s.</p>
             
           </td>
           <td class="code leading">
-	        <a href="http://play.golang.org/p/M972dltae2"><img title="Run code" src="play.png" class="run" /></a>
+	        <a href="http://play.golang.org/p/n5ttmOsMrrJ"><img title="Run code" src="play.png" class="run" /></a>
             <div class="highlight"><pre><span class="kn">package</span> <span class="nx">main</span>
 </pre></div>
 
@@ -98,7 +98,10 @@ it will immediately take the <code>default</code> case.</p>
         
         <tr>
           <td class="docs">
-            <p>A non-blocking send works similarly.</p>
+            <p>A non-blocking send works similarly. Here <code>msg</code>
+cannot be sent to the <code>messages</code> channel, because
+the channel has no buffer and there is no receiver.
+Therefore the <code>default</code> case is selected.</p>
 
           </td>
           <td class="code leading">