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Side by Side Diff: lib/coreimpl/maps.dart

Issue 11267018: Make getKeys, getValues getters (keys, values). (Closed) Base URL: https://dart.googlecode.com/svn/branches/bleeding_edge/dart
Patch Set: Update status files with co19 issue number. Created 8 years, 1 month ago
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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 /* 5 /*
6 * Helper class which implements complex [Map] operations 6 * Helper class which implements complex [Map] operations
7 * in term of basic ones ([Map.getKeys], [Map.operator []], 7 * in term of basic ones ([Map.keys], [Map.operator []],
8 * [Map.operator []=] and [Map.remove].) Not all methods are 8 * [Map.operator []=] and [Map.remove].) Not all methods are
9 * necessary to implement each particular operation. 9 * necessary to implement each particular operation.
10 */ 10 */
11 class Maps { 11 class Maps {
12 static bool containsValue(Map map, value) { 12 static bool containsValue(Map map, value) {
13 for (final v in map.getValues()) { 13 for (final v in map.values) {
14 if (value == v) { 14 if (value == v) {
15 return true; 15 return true;
16 } 16 }
17 } 17 }
18 return false; 18 return false;
19 } 19 }
20 20
21 static bool containsKey(Map map, key) { 21 static bool containsKey(Map map, key) {
22 for (final k in map.getKeys()) { 22 for (final k in map.keys) {
23 if (key == k) { 23 if (key == k) {
24 return true; 24 return true;
25 } 25 }
26 } 26 }
27 return false; 27 return false;
28 } 28 }
29 29
30 static putIfAbsent(Map map, key, ifAbsent()) { 30 static putIfAbsent(Map map, key, ifAbsent()) {
31 if (map.containsKey(key)) { 31 if (map.containsKey(key)) {
32 return map[key]; 32 return map[key];
33 } 33 }
34 final v = ifAbsent(); 34 final v = ifAbsent();
35 map[key] = v; 35 map[key] = v;
36 return v; 36 return v;
37 } 37 }
38 38
39 static clear(Map map) { 39 static clear(Map map) {
40 for (final k in map.getKeys()) { 40 for (final k in map.keys) {
41 map.remove(k); 41 map.remove(k);
42 } 42 }
43 } 43 }
44 44
45 static forEach(Map map, void f(key, value)) { 45 static forEach(Map map, void f(key, value)) {
46 for (final k in map.getKeys()) { 46 for (final k in map.keys) {
47 f(k, map[k]); 47 f(k, map[k]);
48 } 48 }
49 } 49 }
50 50
51 static Collection getValues(Map map) { 51 static Collection getValues(Map map) {
52 final result = []; 52 final result = [];
53 for (final k in map.getKeys()) { 53 for (final k in map.keys) {
54 result.add(map[k]); 54 result.add(map[k]);
55 } 55 }
56 return result; 56 return result;
57 } 57 }
58 58
59 static int length(Map map) => map.getKeys().length; 59 static int length(Map map) => map.keys.length;
60 60
61 static bool isEmpty(Map map) => length(map) == 0; 61 static bool isEmpty(Map map) => length(map) == 0;
62 62
63 /** 63 /**
64 * Returns a string representing the specified map. The returned string 64 * Returns a string representing the specified map. The returned string
65 * looks like this: [:'{key0: value0, key1: value1, ... keyN: valueN}':]. 65 * looks like this: [:'{key0: value0, key1: value1, ... keyN: valueN}':].
66 * The value returned by its [toString] method is used to represent each 66 * The value returned by its [toString] method is used to represent each
67 * key or value. 67 * key or value.
68 * 68 *
69 * If the map collection contains a reference to itself, either 69 * If the map collection contains a reference to itself, either
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104 first = false; 104 first = false;
105 Collections._emitObject(k, result, visiting); 105 Collections._emitObject(k, result, visiting);
106 result.add(': '); 106 result.add(': ');
107 Collections._emitObject(v, result, visiting); 107 Collections._emitObject(v, result, visiting);
108 }); 108 });
109 109
110 result.add('}'); 110 result.add('}');
111 visiting.removeLast(); 111 visiting.removeLast();
112 } 112 }
113 } 113 }
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