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1 // Copyright 2014 Google Inc. All Rights Reserved. | |
2 // | |
3 // Licensed under the Apache License, Version 2.0 (the "License"); | |
4 // you may not use this file except in compliance with the License. | |
5 // You may obtain a copy of the License at | |
6 // | |
7 // http://www.apache.org/licenses/LICENSE-2.0 | |
8 // | |
9 // Unless required by applicable law or agreed to in writing, software | |
10 // distributed under the License is distributed on an "AS IS" BASIS, | |
11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | |
12 // See the License for the specific language governing permissions and | |
13 // limitations under the License. | |
14 | |
15 part of quiver.streams; | |
16 | |
17 /** | |
18 * Returns a [Stream] of [IndexedValue]s where the nth value holds the nth | |
19 * element of [stream] and its index. | |
20 */ | |
21 Stream<IndexedValue> enumerate(Stream stream) { | |
22 var index = 0; | |
23 return stream.map((value) => new IndexedValue(index++, value)); | |
24 } | |
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