OLD | NEW |
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 |
(...skipping 34 matching lines...) Expand 10 before | Expand all | Expand 10 after Loading... |
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 } |
OLD | NEW |