Go concurrency example

example.go

	s := func(name string) string {
		time.Sleep(4 * time.Second)
		fmt.Println("Do something", name)
		return "Done"
	}

	results := []string{}
	c := make(chan string)

	go func() { c <- s("first") }()
	go func() { c <- s("second") }()
	go func() { c <- s("third") }()

	timeout := time.After(5 * time.Second)

	for i := 0; i < 3; i++ {

		select {

		case result := <-c:
			results = append(results, result)
		case <-timeout:
			fmt.Println("Timed out")
			return
		}
	}

	fmt.Println("Until all is done", results)