lrn@google.com
9b23dff467
This reverts commit r17907. TBR. Review URL: https://codereview.chromium.org//12090093 git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge/dart@17918 260f80e4-7a28-3924-810f-c04153c831b5
42 lines
843 B
Dart
42 lines
843 B
Dart
// Copyright (c) 2012, the Dart project authors. Please see the AUTHORS file
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// for details. All rights reserved. Use of this source code is governed by a
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// BSD-style license that can be found in the LICENSE file.
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class A extends Iterable {
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int count;
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A(this.count);
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Iterator get iterator {
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return new AIterator(count);
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}
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}
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class AIterator implements Iterator {
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int _count;
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int _current;
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AIterator(this._count);
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bool moveNext() {
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if (_count > 0) {
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_current = _count;
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_count--;
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return true;
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}
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_current = null;
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return false;
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}
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get current => _current;
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}
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main() {
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var a = new A(10);
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Expect.equals(10, a.length);
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a = new A(0);
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Expect.equals(0, a.length);
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a = new A(5);
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Expect.equals(5, a.map((e) => e + 1).length);
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Expect.equals(3, a.where((e) => e >= 3).length);
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}
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