| // Copyright (c) 2011, the Dart project authors. Please see the AUTHORS file |
| // for details. All rights reserved. Use of this source code is governed by a |
| // BSD-style license that can be found in the LICENSE file. |
| |
| /// @assertion dynamic lastWhere(bool test(E value), {Object orElse()}) |
| /// Returns the last element that satisfies the given predicate [test]. |
| /// An iterable that can access its elements directly may check its elements in |
| /// any order (for example a list starts by checking the last element and then |
| /// moves towards the start of the list). The default implementation iterates |
| /// elements in iteration order, checks test(element) for each, and finally |
| /// returns that last one that matched. |
| /// @author kaigorodov |
| |
| import "dart:collection"; |
| import "../../../Utils/expect.dart"; |
| |
| check(List list, bool test(value), int expected) { |
| DoubleLinkedQueue queue = new DoubleLinkedQueue.from(list); |
| int actual = queue.lastWhere(test); |
| Expect.equals(expected, actual); |
| } |
| |
| main() { |
| check([1, 2, -3, 4, 0], (value) => value > 1, 4); |
| check(const[1, 2, -5, -6], (value) => value < 0, -6); |
| } |