Dart Future Goodies

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Future goodies for Dart.


Just add to your pubspec.yaml:

  future_goodies: any


Future goodies provides some helper functions to deal with Future management. Here we going to document each function.


This function iteraters over a collection by calling the iterator, this iterator can either return a value, or a Future, if a Future is returned, the iteration will wait until it completes before running the next iteration. This function returns a Future, that will resolve as a List containing the result values (all resolved) of the iteration. If any iteration fails (sync or async) the sequence will stop and the Future returned by it will fail with the error.

import 'package:future_goodies/future_goodies.dart';
import 'dart:async';

Future delayed(value) {
  return new Future.delayed(new Duration(milliseconds: 20), () => value);

void main() {
  Future<List<int>> result = sequence([1, 2, 3, 4], (n) => delayed(n * 2));
  result.then((List<int> values) {
    print(values); // [2, 4, 6, 8]