go 基础select

go select

//多个channel协同分工，使用select来监听多个通道
//select和switch类似，case
func main()  {
	numchan1 := make(chan int)
	numchan2 := make(chan int)
	go func() {
		for{
			select {
			case data1:= <- numchan1:
				fmt.Println("读取data1数据",data1)
			case data2 := <- numchan2:
				fmt.Println("读取data2数据",data2)
			}
		}
	}()
	go func() {
		for i:=0;i<30;i++ {
			numchan1 <- i
			fmt.Println("写入数据chan1",i)
			time.Sleep(1*time.Second/2)
		}
	}()
	go func() {
		for i:=0;i<30;i++ {
			numchan2 <-i
			fmt.Println("写入数据chan2",i)
			time.Sleep(1*time.Second)
		}
	}()
	for{
		time.Sleep(5*time.Second)
	}
}