Tickers

Use time.Ticker to perform a task periodically. You will periodically receive a signal through a channel. Unlike time.Timer, you have to be careful about how you dispose of tickers. If you forget to stop a ticker, it will not be garbage collected once it is out of scope, and it will leak.

How to do it...

1. Use time.Ticker to create a new ticker.
2. Read from the ticker’s channel to receive the periodic ticks.
3. When you are done with the ticker, stop it. You don’t have to drain the ticker’s channel.

How it works...

Use a ticker for periodic events. A common pattern is the following:

func poorMansClock(done chan struct{}) {
  // Create a new ticker with a 1 second period
  ticker:=time.NewTicker(time.Second)
  // Stop the ticker once we're done
  defer ticker.Stop()
  for {
    select {
      case <-done:
   ...