Select channel

---

examples/select-channel/select_channel.go

package main

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

func main() {
    ch1 := make(chan string)
    ch2 := make(chan string)

    go count("one", 0, ch1)
    go count("two", 2000, ch2)

    var text string
    // for {
    //     text = <-ch1
    //     fmt.Println(text)
    //     text = <-ch2
    //     fmt.Println(text)
    // }

    for {
        select {
        case text = <-ch1:
            fmt.Println(text)
        case text = <-ch2:
            fmt.Println(text)
            os.Exit(1)
        }
    }

}

func count(name string, ms int, out chan<- string) {
    i := 0
    for {
        i++
        out <- fmt.Sprintf("%v %v", name, i)
        if ms == 0 {
            continue
        }
        time.Sleep(time.Duration(1000000 * ms))
    }
}