github.com/brownsys/tracing-framework-go@v0.0.0-20161210174012-0542a62412fe/go/darwin_amd64/misc/tour/content/concurrency/default-selection.go (about)

     1  // +build OMIT
     2  
     3  package main
     4  
     5  import (
     6  	"fmt"
     7  	"time"
     8  )
     9  
    10  func main() {
    11  	tick := time.Tick(100 * time.Millisecond)
    12  	boom := time.After(500 * time.Millisecond)
    13  	for {
    14  		select {
    15  		case <-tick:
    16  			fmt.Println("tick.")
    17  		case <-boom:
    18  			fmt.Println("BOOM!")
    19  			return
    20  		default:
    21  			fmt.Println("    .")
    22  			time.Sleep(50 * time.Millisecond)
    23  		}
    24  	}
    25  }