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現場で使えるゴルーチン(並列制御)

Posted at 2020-11-22

func main() {
    ch := make(chan struct{}, 10)
    var wg sync.WaitGroup
    for i := 0; i < 1000; i++ {
        ch <- struct{}{}
        wg.Add(1)
        go func(i int) {
            defer func() {
                <-ch
                wg.Done()
            }()

            fmt.Println(i)
        }(i)
    }
    wg.Wait()
}

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