golang channel

go channel 如果该通道已经关闭了 并尝试去获取该通道值不会造成恐慌 反之如果要往以关闭通道里添加数据则会发送恐慌

func main() {
    ch1 := make(chan int, 3)
    ch1 <- 2
    ch1 <- 1
    ch1 <- 3
    go func() {
        for{
            time.Sleep(time.Second)
            elem1 := <-ch1 //这里不会发生恐慌

                fmt.Printf("The first element received from channel ch1: %v\n",elem1)

        }
    }()
    go func() {
        close(ch1) //直接关闭
    }()
    time.Sleep(time.Second*10)
}

golang channel 有两种通道

make(chan type) //非缓冲区

make(chan type, size) //带有缓冲区

来源：https://www.cnblogs.com/jackey2015/p/11714964.html