channel-with-timer.go

package main

import (
	"fmt"
	"time"
)

// emit words onto the channel until the timer kicks in
func emit(wordChannel chan string) {
	defer close(wordChannel)

	words := []string{"The", "quick", "brown", "fox"}

	// timer
	t := time.NewTimer(time.Second * 2)

	i := 0

	for {
		select {

		// someone is listening on the channel
		case wordChannel <- words[i]:
			i++
			if i == len(words) {
				i = 0
			}

		// timer goes off
		case <-t.C:
			return
		}

	}
}

func main() {
	wordCh := make(chan string)

	go emit(wordCh)

	for word := range wordCh {
		fmt.Printf("%s ", word)
	}
}