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| 1 // Copyright (c) 2011, the Dart project authors. Please see the AUTHORS file | 1 // Copyright (c) 2011, 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 /** | 5 /** |
| 6 * The [Collections] class implements static methods useful when | 6 * The [Collections] class implements static methods useful when |
| 7 * writing a class that implements [Collection] and the [iterator] | 7 * writing a class that implements [Collection] and the [iterator] |
| 8 * method. | 8 * method. |
| 9 */ | 9 */ |
| 10 class Collections { | 10 class Collections { |
| 11 static void forEach(Iterable<Object> iterable, void f(Object o)) { | 11 static void forEach(Iterable<Object> iterable, void f(Object o)) { |
| 12 for (final e in iterable) { | 12 for (final e in iterable) { |
| 13 f(e); | 13 f(e); |
| 14 } | 14 } |
| 15 } | 15 } |
| 16 | 16 |
| 17 static List map(Iterable<Object> source, | |
| 18 List<Object> destination, | |
|
ahe
2012/01/05 22:36:54
Indentation.
Ivan Posva
2012/01/05 22:47:03
Please fix the indentation.
| |
| 19 bool f(o)) { | |
|
ahe
2012/01/05 22:36:54
Indentation.
| |
| 20 for (final e in source) { | |
| 21 destination.add(f(e)); | |
| 22 } | |
| 23 return destination; | |
| 24 } | |
| 25 | |
| 26 | |
| 17 static bool some(Iterable<Object> iterable, bool f(Object o)) { | 27 static bool some(Iterable<Object> iterable, bool f(Object o)) { |
| 18 for (final e in iterable) { | 28 for (final e in iterable) { |
| 19 if (f(e)) return true; | 29 if (f(e)) return true; |
| 20 } | 30 } |
| 21 return false; | 31 return false; |
| 22 } | 32 } |
| 23 | 33 |
| 24 static bool every(Iterable<Object> iterable, bool f(Object o)) { | 34 static bool every(Iterable<Object> iterable, bool f(Object o)) { |
| 25 for (final e in iterable) { | 35 for (final e in iterable) { |
| 26 if (!f(e)) return false; | 36 if (!f(e)) return false; |
| 27 } | 37 } |
| 28 return true; | 38 return true; |
| 29 } | 39 } |
| 30 | 40 |
| 31 static List filter(Iterable<Object> source, | 41 static List filter(Iterable<Object> source, |
| 32 List<Object> destination, | 42 List<Object> destination, |
| 33 bool f(o)) { | 43 bool f(o)) { |
| 34 for (final e in source) { | 44 for (final e in source) { |
| 35 if (f(e)) destination.add(e); | 45 if (f(e)) destination.add(e); |
| 36 } | 46 } |
| 37 return destination; | 47 return destination; |
| 38 } | 48 } |
| 39 | 49 |
| 40 static bool isEmpty(Iterable<Object> iterable) { | 50 static bool isEmpty(Iterable<Object> iterable) { |
| 41 return !iterable.iterator().hasNext(); | 51 return !iterable.iterator().hasNext(); |
| 42 } | 52 } |
| 43 } | 53 } |
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