douguadao3883 2015-10-25 01:59
浏览 205
已采纳

Golang中=和<-有什么区别

func worker(id int, jobs <-chan int, results chan<- int) {
    for j := range jobs {
        fmt.Println("worker", id, "processing job", j)
        time.Sleep(time.Second)
        results <- j * 2
    }
}

func main() {
    t := time.Now()
    fmt.Println(t)
    jobs := make(chan int, 100)
    results := make(chan int, 100)
    for w := 1; w <= 4; w++ {
        go worker(w, jobs, results)
    }
    for j := 1; j <= 20; j++ {
        jobs <- j
    }
    close(jobs)
    for a := 1; a <= 20; a++ {
        <-results
    }

    t = time.Now()
    fmt.Println(t)
}

I am confused of the "<-" and I can not find any related documents about "<-". So what is the difference between <- and =?? why I can not use = here?

  • 写回答

3条回答 默认 最新

  • douliangpo0128 2015-10-25 02:16
    关注

    This is related to channels in Go. You are thinking it's related to assignment as in other languages. In your code, a value "j" is being sent to the channel "jobs".

    https://gobyexample.com/channels

    本回答被题主选为最佳回答 , 对您是否有帮助呢?
    评论
查看更多回答(2条)

报告相同问题?

悬赏问题

  • ¥15 python天天向上类似问题,但没有清零
  • ¥30 3天&7天&&15天&销量如何统计同一行
  • ¥30 帮我写一段可以读取LD2450数据并计算距离的Arduino代码
  • ¥15 C#调用python代码(python带有库)
  • ¥15 矩阵加法的规则是两个矩阵中对应位置的数的绝对值进行加和
  • ¥15 活动选择题。最多可以参加几个项目?
  • ¥15 飞机曲面部件如机翼,壁板等具体的孔位模型
  • ¥15 vs2019中数据导出问题
  • ¥20 云服务Linux系统TCP-MSS值修改?
  • ¥20 关于#单片机#的问题:项目:使用模拟iic与ov2640通讯环境:F407问题:读取的ID号总是0xff,自己调了调发现在读从机数据时,SDA线上并未有信号变化(语言-c语言)