tickgroup

This example uses the tickgroup package to create a simple 5 second timer.

ctx, cancel := context.WithCancel(context.Background())

// A tickgroup tg with a cancel context is initialized.
tg := New(ctx)

var i int
tg.Go(time.Second, func() error {
	if i > 4 {
		cancel()
		return nil
	}
	// i is incremeneted every 1 second.
	i++
	fmt.Println(i)
	return nil
})

// After 5 seconds the context is canceled and Wait() returns a nil value, which ceases the process.
if err := tg.Wait(); err != nil {
	fmt.Println(err)
}

Output:

1
2
3
4
5