Repository navigation
Expand file tree
/
Copy pathdata-structures_red-black-tree.js.html
More file actions
320 lines (285 loc) · 13.4 KB
/
Copy pathdata-structures_red-black-tree.js.html
File metadata and controls
320 lines (285 loc) · 13.4 KB
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8">
<title>JSDoc: Source: data-structures/red-black-tree.js</title>
<script src="scripts/prettify/prettify.js"> </script>
<script src="scripts/prettify/lang-css.js"> </script>
<!--[if lt IE 9]>
<script src="//html5shiv.googlecode.com/svn/trunk/html5.js"></script>
<![endif]-->
<link type="text/css" rel="stylesheet" href="styles/prettify-tomorrow.css">
<link type="text/css" rel="stylesheet" href="styles/jsdoc-default.css">
</head>
<body>
<div id="main">
<h1 class="page-title">Source: data-structures/red-black-tree.js</h1>
<section>
<article>
<pre class="prettyprint source linenums"><code>/**
* Red-Black tree is a data structure which is
* a type of self-balancing binary search tree.
*
* @example
*
* var RBTree = require('../src/data-structures/red-black-tree').RBTree;
* var rbTree = new RBTree();
*
* rbTree.put(1981, {
* name: 'John',
* surname: 'Smith'
* });
* rbTree.put(2000, {
* name: 'Pavlo',
* surname: 'Popov'
* });
* rbTree.put(1989, {
* name: 'Garry',
* surname: 'Fisher'
* });
* rbTree.put(1990, {
* name: 'Derek',
* surname: 'Anderson'
* });
*
* console.log(rbTree.get(1989)); // { name: 'Garry', surname: 'Fisher' }
*
* @module data-structures/red-black-tree
*/
(function (exports) {
'use strict';
/**
* Enum for the different colors
*/
var Colors = {
RED: 0,
BLACK: 1
};
exports.Colors = Colors;
/**
* Node of the Red-Black tree.
*
* @private
* @constructor
* @param {Number} key Key of the node.
* @param {Object} value Value assigned to the node.
* @param {Node} left Left node.
* @param {Node} right Right node.
* @param {Number} color Node color.
*/
function Node(key, value, left, right, color) {
this._key = key;
this._left = left;
this._right = right;
this._value = value;
this._color = color;
}
/**
* Check or node is red.
*
* @private
* @method
* @return {Boolean} Returns true if node is red.
*/
Node.prototype.isRed = function () {
return this._color === Colors.RED;
};
/**
* Changes node color.
*
* @private
* @method
*/
Node.prototype.flipColor = function () {
if (this._color === Colors.RED) {
this._color = Colors.BLACK;
} else {
this._color = Colors.RED;
}
};
/**
* Creates getters and setters for the properties:
* key, value, left, right and color.
*/
'key value left right color'
.split(' ')
.forEach(function (key) {
var valueName = key.substr(0, 1).toUpperCase() + key.substr(1, key.length);
Node.prototype['get' + valueName] = function () {
return this['_' + key];
};
Node.prototype['set' + valueName] = function (val) {
this['_' + key] = val;
};
});
exports.Node = Node;
/**
* Red-Black Tree.
*
* @public
* @constructor
*/
exports.RBTree = function () {
this._root = null;
};
/**
* Add value associated with a given key.<br><br>
* Complexity: O(log N).
*
* @public
* @method
* @param {Number} key Key.
* @param {Object} value Value.
*/
exports.RBTree.prototype.put = function (key, value) {
this._root = this._put(key, value, this._root);
this._root.setColor(Colors.BLACK);
};
/**
* Returns true or false depending on whether
* given node is red.
*
* @private
* @method
* @param {Node} node Node which sould be checked.
* @return Returns true if node is red.
*/
exports.RBTree.prototype.isRed = function (node) {
if (!node) {
return false;
}
return node.isRed();
};
/**
* Helper function for insertion of given key,
* value pair into the Red-Black tree.
*
* @private
* @method
* @param {Number} key Key.
* @param {Object} value Value.
* @param {Node} node Node.
*/
exports.RBTree.prototype._put = function (key, value, node) {
var newRoot = node;
if (node === null) {
return new Node(key, value, null, null, Colors.RED);
}
if (node.getKey() > key) {
node.setLeft(this._put(key, value, node.getLeft()));
} else if (node.getKey() < key) {
node.setRight(this._put(key, value, node.getRight()));
} else {
node.setValue(value);
}
if (this.isRed(node.getRight()) && !this.isRed(node.getLeft())) {
newRoot = this._rotateLeft(node);
}
if (this.isRed(node.getLeft()) && this.isRed(node.getLeft().getLeft())) {
newRoot = this._rotateRight(node);
}
if (this.isRed(node.getLeft()) && this.isRed(node.getRight())) {
this._flipColors(node);
}
return newRoot;
};
/**
* Flip the colors of the both neighbours of given node.<br><br>
* Complexity: O(1).
*
* @private
* @method
* @param {Node} node Node.
*/
exports.RBTree.prototype._flipColors = function (node) {
node.getLeft().flipColor();
node.getRight().flipColor();
};
/*
* Rotates given node to the left.<br><br>
* Complexity: O(1).
*
* @private
* @method
* @param {Node} node Node.
* @return {Node} Right node.
*/
exports.RBTree.prototype._rotateLeft = function (node) {
var x = node.getRight();
if (x !== null) {
var temp = x.getLeft();
node.setRight(temp);
x.setLeft(node);
x.setColor(node.getColor());
node.setColor(Colors.RED);
}
return x;
};
/*
* Rotates given node to the right.<br><br>
* Complexity: O(1).
*
* @private
* @method
* @param {Node} node Node.
* @return {Node} Left node.
*/
exports.RBTree.prototype._rotateRight = function (node) {
var x = node.getLeft();
if (x !== null) {
var temp = x.getRight();
node.setLeft(temp);
x.setRight(node);
x.setColor(node.getColor());
node.setColor(Colors.RED);
}
return x;
};
/**
* Get value by the given key.<br><br>
* Complexity: O(log N).
*
* @public
* @param {Number} key A key to be searched for.
* @return {Object} A value which will be returned based on the key.
*/
exports.RBTree.prototype.get = function (key) {
return this._get(this._root, key);
};
/**
* Get value by the given key.<br><br>
*
* @private
* @param {Node} node Node to start with.
* @param {Number} key A key to be searched for.
* @return {Object} A value which will be returned based on the key.
*/
exports.RBTree.prototype._get = function (node, key) {
if (node === null) {
return undefined;
}
if (node.getKey() === key) {
return node.getValue();
}
if (node.getKey() > key) {
return this._get(node.getLeft(), key);
} else {
return this._get(node.getRight(), key);
}
};
})(typeof window === 'undefined' ? module.exports : window);
</code></pre>
</article>
</section>
</div>
<nav>
<h2><a href="index.html">Home</a></h2><h3>Modules</h3><ul><li><a href="module-combinatorics_cartesianproduct.html">combinatorics/cartesianproduct</a></li><li><a href="module-combinatorics_combinations.html">combinatorics/combinations</a></li><li><a href="module-combinatorics_permutations.html">combinatorics/permutations</a></li><li><a href="module-combinatorics_variations-repetition.html">combinatorics/variations-repetition</a></li><li><a href="module-data-structures_avl-tree.html">data-structures/avl-tree</a></li><li><a href="module-data-structures_binary-search-tree.html">data-structures/binary-search-tree</a></li><li><a href="module-data-structures_edge.html">data-structures/edge</a></li><li><a href="module-data-structures_hash-table.html">data-structures/hash-table</a></li><li><a href="module-data-structures_heap.html">data-structures/heap</a></li><li><a href="module-data-structures_interval-tree.html">data-structures/interval-tree</a></li><li><a href="module-data-structures_linked-list.html">data-structures/linked-list</a></li><li><a href="module-data-structures_red-black-tree.html">data-structures/red-black-tree</a></li><li><a href="module-data-structures_size-balanced-tree.html">data-structures/size-balanced-tree</a></li><li><a href="module-data-structures_splay-tree.html">data-structures/splay-tree</a></li><li><a href="module-data-structures_vertex.html">data-structures/vertex</a></li><li><a href="module-graphs_others_topological-sort.html">graphs/others/topological-sort</a></li><li><a href="module-graphs_searching_bfs.html">graphs/searching/bfs</a></li><li><a href="module-graphs_searching_dfs.html">graphs/searching/dfs</a></li><li><a href="module-graphs_shortest-path_bellman-ford.html">graphs/shortest-path/bellman-ford</a></li><li><a href="module-graphs_shortest-path_dijkstra.html">graphs/shortest-path/dijkstra</a></li><li><a href="module-graphs_shortest-path_floyd-warshall.html">graphs/shortest-path/floyd-warshall</a></li><li><a href="module-graphs_spanning-trees_prim.html">graphs/spanning-trees/prim</a></li><li><a href="module-others_fibonacci.html">others/fibonacci</a></li><li><a href="module-others_hanoi.html">others/hanoi</a></li><li><a href="module-others_levenshtein-distance.html">others/levenshtein-distance</a></li><li><a href="module-others_minCoinsChange.html">others/minCoinsChange</a></li><li><a href="module-primes_is-prime.html">primes/is-prime</a></li><li><a href="module-primes_prime-factor-tree.html">primes/prime-factor-tree</a></li><li><a href="module-primes_sieve-of-eratosthenes.html">primes/sieve-of-eratosthenes</a></li><li><a href="module-searching_binarysearch.html">searching/binarysearch</a></li><li><a href="module-searching_knuth-morris-pratt.html">searching/knuth-morris-pratt</a></li><li><a href="module-searching_longest-increasing-subsequence.html">searching/longest-increasing-subsequence</a></li><li><a href="module-searching_maximum-subarray.html">searching/maximum-subarray</a></li><li><a href="module-searching_maximum-subarray-divide-and-conquer.html">searching/maximum-subarray-divide-and-conquer</a></li><li><a href="module-searching_quickselect.html">searching/quickselect</a></li><li><a href="module-searching_recursive-binarysearch.html">searching/recursive-binarysearch</a></li><li><a href="module-sets_quickfind.html">sets/quickfind</a></li><li><a href="module-sets_quickunion.html">sets/quickunion</a></li><li><a href="module-sets_weightquickunion.html">sets/weightquickunion</a></li><li><a href="module-shuffle_fisheryates.html">shuffle/fisheryates</a></li><li><a href="module-shuffle_richarddurstenfeld.html">shuffle/richarddurstenfeld</a></li><li><a href="module-sorting_3-way-string-quicksort.html">sorting/3-way-string-quicksort</a></li><li><a href="module-sorting_bubblesort.html">sorting/bubblesort</a></li><li><a href="module-sorting_bucketsort.html">sorting/bucketsort</a></li><li><a href="module-sorting_countingsort.html">sorting/countingsort</a></li><li><a href="module-sorting_heapsort.html">sorting/heapsort</a></li><li><a href="module-sorting_insertion-binary-sort.html">sorting/insertion-binary-sort</a></li><li><a href="module-sorting_insertionsort.html">sorting/insertionsort</a></li><li><a href="module-sorting_lsd.html">sorting/lsd</a></li><li><a href="module-sorting_mergesort.html">sorting/mergesort</a></li><li><a href="module-sorting_mergesort_merge.html">sorting/mergesort/merge</a></li><li><a href="module-sorting_msd.html">sorting/msd</a></li><li><a href="module-sorting_oddeven-sort.html">sorting/oddeven-sort</a></li><li><a href="module-sorting_quicksort-middle.html">sorting/quicksort-middle</a></li><li><a href="module-sorting_radixsort.html">sorting/radixsort</a></li><li><a href="module-sorting_recursive-insertionsort.html">sorting/recursive-insertionsort</a></li><li><a href="module-sorting_selectionsort.html">sorting/selectionsort</a></li><li><a href="module-sorting_shellsort.html">sorting/shellsort</a></li></ul><h3>Classes</h3><ul><li><a href="module-data-structures_avl-tree.AVLTree.html">AVLTree</a></li><li><a href="module-data-structures_avl-tree.Node.html">Node</a></li><li><a href="module-data-structures_binary-search-tree.BinaryTree.html">BinaryTree</a></li><li><a href="module-data-structures_binary-search-tree.Node.html">Node</a></li><li><a href="module-data-structures_hash-table.Hashtable.html">Hashtable</a></li><li><a href="module-data-structures_hash-table.Node.html">Node</a></li><li><a href="module-data-structures_heap.Heap.html">Heap</a></li><li><a href="module-data-structures_interval-tree.IntervalTree.html">IntervalTree</a></li><li><a href="module-data-structures_interval-tree.Node.html">Node</a></li><li><a href="module-data-structures_linked-list.LinkedList.html">LinkedList</a></li><li><a href="module-data-structures_linked-list.Node.html">Node</a></li><li><a href="module-data-structures_red-black-tree.RBTree.html">RBTree</a></li><li><a href="module-data-structures_size-balanced-tree-CreateSBTreeClass-SBTree.html">SBTree</a></li><li><a href="module-data-structures_splay-tree.Node.html">Node</a></li><li><a href="module-data-structures_splay-tree.SplayTree.html">SplayTree</a></li><li><a href="module-graphs_spanning-trees_prim.Graph.html">Graph</a></li><li><a href="module-sets_quickfind.QuickFind.html">QuickFind</a></li><li><a href="module-sets_quickunion.QuickUnion.html">QuickUnion</a></li><li><a href="module-sets_weightquickunion.QuickUnion.html">QuickUnion</a></li></ul>
</nav>
<br class="clear">
<footer>
Documentation generated by <a href="https://github.com/jsdoc3/jsdoc">JSDoc 3.3.0-alpha13</a> on Wed May 18 2016 11:36:06 GMT+0300 (EEST)
</footer>
<script> prettyPrint(); </script>
<script src="scripts/linenumber.js"> </script>
</body>
</html>