go by example part 3

5-go-by-example/26-channel-synchronization.go

@@ -0,0 +1,24 @@
+// synchronize execution across goroutines
+package main
+
+import (
+	"fmt"
+	"time"
+)
+
+// the done channel will be used to notify another goroutine that this function’s work is done
+func worker(done chan bool) {
+	fmt.Print("working...")
+	time.Sleep(time.Second)
+	fmt.Println("done")
+	// Send a value to notify "done"
+	done <- true
+}
+
+func main() {
+	// start a worker goroutine, giving it the channel to notify on
+	done := make(chan bool, 1)
+	go worker(done)
+	// block until receive notification from the worker on the channel
+	<-done
+}