Timer

timer.go

package main

import (
	"fmt"
	"time"
)

// Suggestions from golang-nuts
// http://play.golang.org/p/Ctg3_AQisl

func doEvery(d time.Duration, f func(time.Time)) {
	for x := range time.Tick(d) {
		f(x)
	}
}

func helloworld(t time.Time) {
	fmt.Printf("%v: Hello, World!\n", t)
}

func main() {
	doEvery(20*time.Millisecond, helloworld)
}