Closing Channels

packagemain

import "fmt"

func main() {

    jobs := make(chan int, 5)

    done := make(chan bool)

    go func() {

        for {

            j, more := <-jobs

            if more {

                fmt.Println("received job", j)

            } else {

                fmt.Println("received all jobs")

                done <- true

                return

            }

        }

    }()

    for j := 1; j <= 3; j++ {

        jobs <- j

        fmt.Println("sent job", j)

    }

    // 关闭通道

    close(jobs)

    fmt.Println("sent all jobs")

    <-done

}