func main() {
	ticker := time.NewTicker(time.Second)
	defer ticker.Stop()
	for {
		select {
		case t := <-ticker.C:
			fmt.Println("Current time: ", t)
		}
	}
}

func main() {
	sigs := make(chan os.Signal, 1)
	signal.Notify(sigs)
	ticker := time.NewTicker(time.Second)
	defer ticker.Stop()
	for {
		select {
		case t := <-ticker.C:
			fmt.Println("Current time: ", t)
		case <-sigs:
			fmt.Println("done")
			return
		}
	}
}

func main() {
	c := make(chan int, 1)
	go func() {
		for i := 0; i < 10; i++ {
			time.Sleep(500 * time.Millisecond)
			c <- i
		}
		close(c)
	}()
	ticker := time.NewTicker(time.Second)
	defer ticker.Stop()
	for {
		select {
		case i, ok := <-c:
			if !ok {
				fmt.Println("done")
				return
			}
			fmt.Println("i = ", i)
		case t := <-ticker.C:
			fmt.Println("Current time: ", t)
		}
	}
}

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