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Issue 15263004: Adding isNotEmpty property to collection and string. (Closed) Base URL: http://dart.googlecode.com/svn/branches/bleeding_edge/dart
Patch Set: Fix template generation Created 7 years, 7 months ago
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1 // Copyright (c) 2011, the Dart project authors. Please see the AUTHORS file 1 // Copyright (c) 2011, 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 import "dart:collection"; 5 import "dart:collection";
6 import "dart:typed_data"; 6 import "dart:typed_data";
7 import "package:expect/expect.dart"; 7 import "package:expect/expect.dart";
8 8
9 void main() { 9 void main() {
10 // Typed lists - fixed length and can only contain integers. 10 // Typed lists - fixed length and can only contain integers.
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42 testGrowableList(new Int8List(0).toList()); 42 testGrowableList(new Int8List(0).toList());
43 testGrowableList(new Uint16List(0).toList()); 43 testGrowableList(new Uint16List(0).toList());
44 testGrowableList(new Int16List(0).toList()); 44 testGrowableList(new Int16List(0).toList());
45 testGrowableList(new Uint32List(0).toList()); 45 testGrowableList(new Uint32List(0).toList());
46 testGrowableList(new Int32List(0).toList()); 46 testGrowableList(new Int32List(0).toList());
47 } 47 }
48 48
49 void testLength(int length, List list) { 49 void testLength(int length, List list) {
50 Expect.equals(length, list.length); 50 Expect.equals(length, list.length);
51 (length == 0 ? Expect.isTrue : Expect.isFalse)(list.isEmpty); 51 (length == 0 ? Expect.isTrue : Expect.isFalse)(list.isEmpty);
52 (length != 0 ? Expect.isTrue : Expect.isFalse)(list.isNotEmpty);
52 } 53 }
53 54
54 void testTypedLengthInvariantOperations(List list) { 55 void testTypedLengthInvariantOperations(List list) {
55 // length 56 // length
56 Expect.equals(list.length, 4); 57 Expect.equals(list.length, 4);
57 // operators [], []=. 58 // operators [], []=.
58 for (int i = 0; i < 4; i++) list[i] = 0; 59 for (int i = 0; i < 4; i++) list[i] = 0;
59 list[0] = 4; 60 list[0] = 4;
60 Expect.listEquals([4, 0, 0, 0], list); 61 Expect.listEquals([4, 0, 0, 0], list);
61 list[1] = 7; 62 list[1] = 7;
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469 } 470 }
470 471
471 class MyFixedList<E> extends ListBase<E> { 472 class MyFixedList<E> extends ListBase<E> {
472 List<E> _source; 473 List<E> _source;
473 MyFixedList(this._source); 474 MyFixedList(this._source);
474 int get length => _source.length; 475 int get length => _source.length;
475 void set length(int length) { throw new UnsupportedError("Fixed length!"); } 476 void set length(int length) { throw new UnsupportedError("Fixed length!"); }
476 E operator[](int index) => _source[index]; 477 E operator[](int index) => _source[index];
477 void operator[]=(int index, E value) { _source[index] = value; } 478 void operator[]=(int index, E value) { _source[index] = value; }
478 } 479 }
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