channels_demo.go

package main

import "time"

func main() {
	stop := make(chan struct{})

	go func() {
		//wait := time.After(500 * time.Millisecond)
		//<-wait
		time.Sleep(time.Millisecond * 500)
		println("stopping")
		close(stop)
	}()

loop:
	for {
		select {
		case <-stop: // triggered when the stop channel is closed
			break loop // exit
		default:
			println("foo")
		}
	}
}