Index: polymer_expressions/lib/src/globals.dart |
diff --git a/polymer_expressions/lib/src/globals.dart b/polymer_expressions/lib/src/globals.dart |
deleted file mode 100644 |
index d2a4ffd52628f842a68995ed7c622f69b84d0bf5..0000000000000000000000000000000000000000 |
--- a/polymer_expressions/lib/src/globals.dart |
+++ /dev/null |
@@ -1,77 +0,0 @@ |
-// Copyright (c) 2013, the Dart project authors. Please see the AUTHORS file |
-// for details. All rights reserved. Use of this source code is governed by a |
-// BSD-style license that can be found in the LICENSE file. |
- |
-/** |
- * Contains functions that are included by default in [PolymerExpressions]. |
- * |
- * - [enumerate]: a convenient way to iterate over items and the indexes. |
- */ |
-// Code from https://github.com/google/quiver-dart/commit/52edc4baf37e99ff6a8f99c648b29b135fc0b880 |
-library polymer_expressions.src.globals; |
- |
-import 'dart:collection'; |
-import 'package:observe/observe.dart' show reflectable; |
- |
-/** |
- * Returns an [Iterable] of [IndexedValue]s where the nth value holds the nth |
- * element of [iterable] and its index. |
- */ |
-Iterable<IndexedValue> enumerate(Iterable iterable) => |
- new EnumerateIterable(iterable); |
- |
-@reflectable class IndexedValue<V> { |
- final int index; |
- final V value; |
- |
- operator==(o) => o is IndexedValue && o.index == index && o.value == value; |
- int get hashCode => value.hashCode; |
- String toString() => '($index, $value)'; |
- |
- IndexedValue(this.index, this.value); |
-} |
- |
-/** |
- * An [Iterable] of [IndexedValue]s where the nth value holds the nth |
- * element of [iterable] and its index. See [enumerate]. |
- */ |
-// This was inspired by MappedIterable internal to Dart collections. |
-class EnumerateIterable<V> extends IterableBase<IndexedValue<V>> { |
- final Iterable<V> _iterable; |
- |
- EnumerateIterable(this._iterable); |
- |
- Iterator<IndexedValue<V>> get iterator => |
- new EnumerateIterator<V>(_iterable.iterator); |
- |
- // Length related functions are independent of the mapping. |
- int get length => _iterable.length; |
- bool get isEmpty => _iterable.isEmpty; |
- |
- // Index based lookup can be done before transforming. |
- IndexedValue<V> get first => new IndexedValue<V>(0, _iterable.first); |
- IndexedValue<V> get last => new IndexedValue<V>(length - 1, _iterable.last); |
- IndexedValue<V> get single => new IndexedValue<V>(0, _iterable.single); |
- IndexedValue<V> elementAt(int index) => |
- new IndexedValue<V>(index, _iterable.elementAt(index)); |
-} |
- |
-/** The [Iterator] returned by [EnumerateIterable.iterator]. */ |
-class EnumerateIterator<V> extends Iterator<IndexedValue<V>> { |
- final Iterator<V> _iterator; |
- int _index = 0; |
- IndexedValue<V> _current; |
- |
- EnumerateIterator(this._iterator); |
- |
- IndexedValue<V> get current => _current; |
- |
- bool moveNext() { |
- if (_iterator.moveNext()) { |
- _current = new IndexedValue(_index++, _iterator.current); |
- return true; |
- } |
- _current = null; |
- return false; |
- } |
-} |