example using a default statement in a select to sidestep blocking

concurrency/default-select/go.go

@@ -0,0 +1,23 @@
+package main
+
+import (
+	"fmt"
+	"time"
+)
+
+func main() {
+	tick := time.Tick(time.Second)
+	boom := time.After(time.Second * 10)
+	for {
+		select {
+		case <-tick:
+			fmt.Println("tick.")
+		case <-boom:
+			fmt.Println("BOOM!")
+			return
+		default:
+			fmt.Println("    .")
+			time.Sleep(time.Millisecond * 100)
+		}
+	}
+}