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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 part of dart.core; | 5 part of dart.core; |
6 | 6 |
7 /** | 7 /** |
8 * An indexable collection of objects with a length. | 8 * An indexable collection of objects with a length. |
9 * | 9 * |
10 * Subclasses of this class implement different kinds of lists. | 10 * Subclasses of this class implement different kinds of lists. |
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110 external factory List.filled(int length, E fill, {bool growable: false}); | 110 external factory List.filled(int length, E fill, {bool growable: false}); |
111 | 111 |
112 /** | 112 /** |
113 * Creates a list containing all [elements]. | 113 * Creates a list containing all [elements]. |
114 * | 114 * |
115 * The [Iterator] of [elements] provides the order of the elements. | 115 * The [Iterator] of [elements] provides the order of the elements. |
116 * | 116 * |
117 * This constructor returns a growable list when [growable] is true; | 117 * This constructor returns a growable list when [growable] is true; |
118 * otherwise, it returns a fixed-length list. | 118 * otherwise, it returns a fixed-length list. |
119 */ | 119 */ |
120 external factory List.from(Iterable elements, { bool growable: true }); | 120 external factory List.from(Iterable elements, {bool growable: true}); |
121 | 121 |
122 /** | 122 /** |
123 * Generates a list of values. | 123 * Generates a list of values. |
124 * | 124 * |
125 * Creates a list with [length] positions and fills it with values created by | 125 * Creates a list with [length] positions and fills it with values created by |
126 * calling [generator] for each index in the range `0` .. `length - 1` | 126 * calling [generator] for each index in the range `0` .. `length - 1` |
127 * in increasing order. | 127 * in increasing order. |
128 * | 128 * |
129 * new List<int>.generate(3, (int index) => index * index); // [0, 1, 4] | 129 * new List<int>.generate(3, (int index) => index * index); // [0, 1, 4] |
130 * | 130 * |
131 * The created list is fixed-length unless [growable] is true. | 131 * The created list is fixed-length unless [growable] is true. |
132 */ | 132 */ |
133 factory List.generate(int length, E generator(int index), | 133 factory List.generate(int length, E generator(int index), |
134 { bool growable: true }) { | 134 {bool growable: true}) { |
135 List<E> result; | 135 List<E> result; |
136 if (growable) { | 136 if (growable) { |
137 result = <E>[]..length = length; | 137 result = <E>[]..length = length; |
138 } else { | 138 } else { |
139 result = new List<E>(length); | 139 result = new List<E>(length); |
140 } | 140 } |
141 for (int i = 0; i < length; i++) { | 141 for (int i = 0; i < length; i++) { |
142 result[i] = generator(i); | 142 result[i] = generator(i); |
143 } | 143 } |
144 return result; | 144 return result; |
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511 * as values. The `Map.keys` [Iterable] iterates the indices of this list | 511 * as values. The `Map.keys` [Iterable] iterates the indices of this list |
512 * in numerical order. | 512 * in numerical order. |
513 * | 513 * |
514 * List<String> words = ['fee', 'fi', 'fo', 'fum']; | 514 * List<String> words = ['fee', 'fi', 'fo', 'fum']; |
515 * Map<int, String> map = words.asMap(); | 515 * Map<int, String> map = words.asMap(); |
516 * map[0] + map[1]; // 'feefi'; | 516 * map[0] + map[1]; // 'feefi'; |
517 * map.keys.toList(); // [0, 1, 2, 3] | 517 * map.keys.toList(); // [0, 1, 2, 3] |
518 */ | 518 */ |
519 Map<int, E> asMap(); | 519 Map<int, E> asMap(); |
520 } | 520 } |
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