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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.collection; | 5 part of dart.collection; |
6 | 6 |
7 /** | 7 /** |
8 * This [Iterable] mixin implements all [Iterable] members except `iterator`. | 8 * This [Iterable] mixin implements all [Iterable] members except `iterator`. |
9 * | 9 * |
10 * All other methods are implemented in terms of `iterator`. | 10 * All other methods are implemented in terms of `iterator`. |
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114 | 114 |
115 Iterable<E> skip(int count) { | 115 Iterable<E> skip(int count) { |
116 return new SkipIterable<E>(this, count); | 116 return new SkipIterable<E>(this, count); |
117 } | 117 } |
118 | 118 |
119 Iterable<E> skipWhile(bool test(E value)) { | 119 Iterable<E> skipWhile(bool test(E value)) { |
120 return new SkipWhileIterable<E>(this, test); | 120 return new SkipWhileIterable<E>(this, test); |
121 } | 121 } |
122 | 122 |
123 E get first { | 123 E get first { |
124 Iterator it = iterator; | 124 Iterator<E> it = iterator; |
125 if (!it.moveNext()) { | 125 if (!it.moveNext()) { |
126 throw IterableElementError.noElement(); | 126 throw IterableElementError.noElement(); |
127 } | 127 } |
128 return it.current; | 128 return it.current; |
129 } | 129 } |
130 | 130 |
131 E get last { | 131 E get last { |
132 Iterator it = iterator; | 132 Iterator<E> it = iterator; |
133 if (!it.moveNext()) { | 133 if (!it.moveNext()) { |
134 throw IterableElementError.noElement(); | 134 throw IterableElementError.noElement(); |
135 } | 135 } |
136 E result; | 136 E result; |
137 do { | 137 do { |
138 result = it.current; | 138 result = it.current; |
139 } while(it.moveNext()); | 139 } while(it.moveNext()); |
140 return result; | 140 return result; |
141 } | 141 } |
142 | 142 |
143 E get single { | 143 E get single { |
144 Iterator it = iterator; | 144 Iterator<E> it = iterator; |
145 if (!it.moveNext()) throw IterableElementError.noElement(); | 145 if (!it.moveNext()) throw IterableElementError.noElement(); |
146 E result = it.current; | 146 E result = it.current; |
147 if (it.moveNext()) throw IterableElementError.tooMany(); | 147 if (it.moveNext()) throw IterableElementError.tooMany(); |
148 return result; | 148 return result; |
149 } | 149 } |
150 | 150 |
151 E firstWhere(bool test(E value), { E orElse() }) { | 151 E firstWhere(bool test(E value), { E orElse() }) { |
152 for (E element in this) { | 152 for (E element in this) { |
153 if (test(element)) return element; | 153 if (test(element)) return element; |
154 } | 154 } |
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391 elision = "..."; | 391 elision = "..."; |
392 length += ELLIPSIS_SIZE + OVERHEAD; | 392 length += ELLIPSIS_SIZE + OVERHEAD; |
393 } | 393 } |
394 } | 394 } |
395 if (elision != null) { | 395 if (elision != null) { |
396 parts.add(elision); | 396 parts.add(elision); |
397 } | 397 } |
398 parts.add(penultimateString); | 398 parts.add(penultimateString); |
399 parts.add(ultimateString); | 399 parts.add(ultimateString); |
400 } | 400 } |
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