Add select...default

selectdefault/selectdefault.go

@@ -0,0 +1,31 @@
+package selectdefault
+
+import "fmt"
+
+func SelectDefault() {
+	msgs := make(chan string)
+	signals := make(chan string)
+
+	select {
+	case val := <-msgs:
+		fmt.Println("Received", val)
+	default:
+		fmt.Println("`default` can be used to prevent blocking when there's nothing to receive from a channel")
+	}
+
+	select {
+	case msgs <- "hello":
+		fmt.Println("Sent hello")
+	default:
+		fmt.Println("`default` can be used to prevent blocking when we send something to an unbuffered channel but there's nobody to receive")
+	}
+
+	select {
+	case val := <-msgs:
+		fmt.Println("Received something from msgs", val)
+	case val := <-signals:
+		fmt.Println("Received something from signals", val)
+	default:
+		fmt.Println("`default` can be used to prevent blocking when there's nothing to receive or if its not possible to send across multiple channels")
+	}
+}