OLD | NEW |
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 /** | 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 { |
(...skipping 24 matching lines...) Expand all Loading... |
35 return true; | 35 return true; |
36 } | 36 } |
37 | 37 |
38 static List map(Iterable source, List destination, f(o)) { | 38 static List map(Iterable source, List destination, f(o)) { |
39 for (final e in source) { | 39 for (final e in source) { |
40 destination.add(f(e)); | 40 destination.add(f(e)); |
41 } | 41 } |
42 return destination; | 42 return destination; |
43 } | 43 } |
44 | 44 |
45 static Dynamic reduce(Iterable iterable, | 45 static dynamic reduce(Iterable iterable, |
46 Dynamic initialValue, | 46 dynamic initialValue, |
47 Dynamic combine(Dynamic previousValue, element)) { | 47 dynamic combine(dynamic previousValue, element)) { |
48 for (final element in iterable) { | 48 for (final element in iterable) { |
49 initialValue = combine(initialValue, element); | 49 initialValue = combine(initialValue, element); |
50 } | 50 } |
51 return initialValue; | 51 return initialValue; |
52 } | 52 } |
53 | 53 |
54 static List filter(Iterable source, List destination, bool f(o)) { | 54 static List filter(Iterable source, List destination, bool f(o)) { |
55 for (final e in source) { | 55 for (final e in source) { |
56 if (f(e)) destination.add(e); | 56 if (f(e)) destination.add(e); |
57 } | 57 } |
(...skipping 97 matching lines...) Expand 10 before | Expand all | Expand 10 after Loading... |
155 * Returns true if the specified collection contains the specified object | 155 * Returns true if the specified collection contains the specified object |
156 * reference. | 156 * reference. |
157 */ | 157 */ |
158 static _containsRef(Collection c, Object ref) { | 158 static _containsRef(Collection c, Object ref) { |
159 for (var e in c) { | 159 for (var e in c) { |
160 if (e === ref) return true; | 160 if (e === ref) return true; |
161 } | 161 } |
162 return false; | 162 return false; |
163 } | 163 } |
164 } | 164 } |
OLD | NEW |