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‎.gitignore

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packages
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pubspec.lock
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‎AUTHORS

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# Below is a list of people and organizations that have contributed
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# to the quiver project. Names should be added to the list like so:
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#
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# Name/Organization <email address>
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Google Inc.

‎LICENSE

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Apache License
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Version 2.0, January 2004
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http://www.apache.org/licenses/
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‎PATENTS

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Additional IP Rights Grant (Patents)
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"This implementation" means the copyrightable works distributed by
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Google as part of the Dart Project.
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Google hereby grants to you a perpetual, worldwide, non-exclusive,
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no-charge, royalty-free, irrevocable (except as stated in this
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section) patent license to make, have made, use, offer to sell, sell,
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import, transfer, and otherwise run, modify and propagate the contents
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of this implementation of Dart, where such license applies only to
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those patent claims, both currently owned by Google and acquired in
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the future, licensable by Google that are necessarily infringed by
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this implementation of Dart. This grant does not include claims that
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would be infringed only as a consequence of further modification of
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this implementation. If you or your agent or exclusive licensee
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institute or order or agree to the institution of patent litigation
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against any entity (including a cross-claim or counterclaim in a
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lawsuit) alleging that this implementation of Dart or any code
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incorporated within this implementation of Dart constitutes direct or
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contributory patent infringement, or inducement of patent
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infringement, then any patent rights granted to you under this License
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for this implementation of Dart shall terminate as of the date such
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litigation is filed.

‎README.md

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===========
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A set of utility libraries for Dart
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## iterables.dart
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The iterables library contains functions for transforming Iterables in different
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ways, similar to Python's itertools. These include `count`, `cycle`,
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`enumerate`, `range`, and `zip`.
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‎lib/iterables.dart

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// Copyright 2013 Google Inc. All Rights Reserved.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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library quiver.iterables;
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import 'dart:collection';
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part 'src/iterables/count.dart';
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part 'src/iterables/cycle.dart';
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part 'src/iterables/enumerate.dart';
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part 'src/iterables/infinite_iterable.dart';
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part 'src/iterables/min_max.dart';
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part 'src/iterables/range.dart';
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part 'src/iterables/zip.dart';

‎lib/src/iterables/count.dart

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// Copyright 2013 Google Inc. All Rights Reserved.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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part of quiver.iterables;
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/**
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* Returns an infinite [Iterable] of [num]s, starting from [start] and
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* increasing by [step].
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*/
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Iterable<num> count([num start = 0, num step = 1]) => new _Count(start, step);
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class _Count extends InfiniteIterable<num> {
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final num start, step;
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_Count(num this.start, num this.step);
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Iterator<num> get iterator => new _CountIterator(start, step);
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// TODO(justin): return an infinite list for toList() and a special Set
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// implmentation for toSet()?
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}
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class _CountIterator implements Iterator<num> {
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final num _start, _step;
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num _current;
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_CountIterator(num this._start, this._step);
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num get current => _current;
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bool moveNext() {
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_current = (_current == null) ? _start : _current + _step;
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return true;
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}
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}

‎lib/src/iterables/cycle.dart

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// Copyright 2013 Google Inc. All Rights Reserved.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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part of quiver.iterables;
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/**
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* Returns an [Iterable] that infinitely cycles through the elements of
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* [iterable]. If [iterable] is empty, the returned Iterable will also be empty.
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*/
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Iterable cycle(Iterable iterable) => new _Cycle(iterable);
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class _Cycle<T> extends InfiniteIterable<T> {
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final Iterable<T> _iterable;
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_Cycle(this._iterable);
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Iterator<T> get iterator => new _CycleIterator(_iterable);
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// TODO(justin): add methods that can be answered by the wrapped iterable
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}
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class _CycleIterator<T> implements Iterator<T> {
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final Iterable<T> _iterable;
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Iterator<T> _iterator;
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_CycleIterator(_iterable)
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: _iterable = _iterable,
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_iterator = _iterable.iterator;
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T get current => _iterator.current;
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bool moveNext() {
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if (!_iterator.moveNext()) {
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_iterator = _iterable.iterator;
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return _iterator.moveNext();
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}
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return true;
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}
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}

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