核弹发射装置 select channel

2019独角兽企业重金招聘Python工程师标准>>>

package main

import (
    "fmt"
    "time"
    "os"
)

func launch() {
    fmt.Println("nuclear launch detected")
}

func commencingCountDown(canLunch chan int) {
    c := time.Tick(1 * time.Second)
    for countDown := 20; countDown > 0; countDown-- {
        fmt.Println(countDown)
        <- c
    }
    canLunch <- -1
}

func isAbort(abort chan int) {
    os.Stdin.Read(make([]byte, 1))
    abort <- -1
}

func main() {
    fmt.Println("Commencing coutdown")

    abort := make(chan int)
    canLunch := make(chan int)
    go isAbort(abort)
    go commencingCountDown(canLunch)
    select {
    case <- canLunch:

    case <- abort:
        fmt.Println("Launch aborted!")
        return
    }
    launch()
}

 

转载于:https://my.oschina.net/robslove/blog/3017623