nonblocking channel operations

src/039-nonblocking-channel-operations/nonblocking-channel-operations.go

@@ -0,0 +1,35 @@
+package main
+
+import "fmt"
+
+func main() {
+	messages := make(chan string)
+	signals := make(chan bool)
+
+	// Non-blocking receive.
+	select {
+	case msg := <- messages:
+		fmt.Println("received message", msg)
+	default:
+		fmt.Println("no messages received")
+	}
+
+	// Non-blocking send.
+	msg := "hi"
+	select {
+	case messages <- msg:
+		fmt.Println("sent message", msg)
+	default:
+		fmt.Println("no messages sent")
+	}
+
+	// Non-blocking multi-way select.
+	select {
+	case msg := <- messages:
+		fmt.Println("received message", msg)
+	case sig := <- signals:
+		fmt.Println("received signal", sig)
+	default:
+		fmt.Println("no activity")
+	}
+}

tool/index.txt

@@ -43,7 +43,7 @@ timeouts
 scatter-gather
 rate-limiting
 worker-pools
-nonblocking-channel-operations ~
+nonblocking-channel-operations
 closing-channels
 timers
 tickers