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1 // Copyright (c) 2012, the Dart project authors. Please see the AUTHORS file | 1 // Copyright (c) 2012, the Dart project authors. Please see the AUTHORS file |
2 // for details. All rights reserved. Use of this source code is governed by a | 2 // for details. All rights reserved. Use of this source code is governed by a |
3 // BSD-style license that can be found in the LICENSE file. | 3 // BSD-style license that can be found in the LICENSE file. |
4 | 4 |
5 #library('util'); | 5 #library('util'); |
6 | 6 |
7 /** | 7 /** |
8 * An abstract map implementation. This class can be used as a superclass for | 8 * An abstract map implementation. This class can be used as a superclass for |
9 * implementing maps, requiring only the further implementation of the | 9 * implementing maps, requiring only the further implementation of the |
10 * [:operator []:], [:forEach:] and [:length:] methods to provide a fully | 10 * [:operator []:], [:forEach:] and [:length:] methods to provide a fully |
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152 | 152 |
153 void forEach(void f(K key, Vout value)) { | 153 void forEach(void f(K key, Vout value)) { |
154 _map.forEach((K k, Vin v) { | 154 _map.forEach((K k, Vin v) { |
155 var value = _filter(v); | 155 var value = _filter(v); |
156 if (value !== null) { | 156 if (value !== null) { |
157 f(k, value); | 157 f(k, value); |
158 } | 158 } |
159 }); | 159 }); |
160 } | 160 } |
161 } | 161 } |
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