Dart: Scalable Application Development

Running a recurring function

Let's suppose your code needs to run a certain function periodically at a certain interval. This recipe shows how you can do this very easily.

How to do it...

Look at the following code of recurring_function.dart:

import'dart:async';

var count = 0;
const TIMEOUT = const Duration(seconds: 5);
const MS = const Duration(milliseconds: 1);

void main() {
  // 1. Running a function repeatedly:
  const PERIOD = const Duration(seconds:2);
  newTimer.periodic(PERIOD, repeatMe);
  // 3. Running a function once after some time:
  const AFTER70MS = const Duration(milliseconds:70);
  new Timer(AFTER70MS, () => print('this was quick!'));
  // 4. Running a function asap:
  Timer.run(() => print('I ran asap!')); // 5. Calculating a period and provoking ...