golang misc

	ch1 := make(chan string)

	fmt.Println("1@", time.Now())
	for {
		select {
		case <-ch1:
			fmt.Println("2@", time.Now())
		case <-time.After(time.Second * 3):
			fmt.Println("3@", time.Now())
			return
		}
	}

1@ 2015-03-19 15:21:45.0547549 +0800 CST

2@ 2015-03-19 15:21:46.0548121 +0800 CST

3@ 2015-03-19 15:21:49.0569838 +0800 CST

	ch := make(chan string)
	select {
	case ch <- "hello":
		fmt.Println("send")
	default:
		fmt.Println("nothing")
	}

 nothing