Go复习--chan close range

package main

import "fmt"

func main() {
    ch := make(chan int ,5)
    ch <- 1
    ch <- 2
    ch <- 3
    //发送完，必须close，否则dead lock
    close(ch)

    //range 遍历 取出 数据，所以，没法重复range

    for v := range ch{
        fmt.Println(v)
    }

    for v := range ch{
        fmt.Println(v)
    }

    for v := range ch{
        fmt.Println(v)
    }
}