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The Go Programming Language
book

The Go Programming Language

by Alan A. A. Donovan, Brian W. Kernighan
October 2015
Beginner to intermediate content levelBeginner to intermediate
400 pages
14h 44m
English
Addison-Wesley Professional
Content preview from The Go Programming Language

8.7 Multiplexing with select

The program below does the countdown for a rocket launch. The time.Tick function returns a channel on which it sends events periodically, acting like a metronome. The value of each event is a timestamp, but it is rarely as interesting as the fact of its delivery.

gopl.io/ch8/countdown1
func main() {
    fmt.Println("Commencing countdown.")
    tick := time.Tick(1 * time.Second)
    for countdown := 10; countdown > 0; countdown-- {
        fmt.Println(countdown)
        <-tick
    }
    launch()
}

Now let’s add the ability to abort the launch sequence by pressing the return key during the countdown. First, we start a goroutine that tries to read a single byte from the standard input and, if it succeeds, sends a value ...

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Publisher Resources

ISBN: 9780134190570Purchase book