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37 lines
966 B
JavaScript
37 lines
966 B
JavaScript
(function (exports) {
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'use strict';
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/**
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* Shuffle of an array elements.
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* This algorithm is modified version of Fisher-Yates shuffle
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* algorithm and is introduced by Richard Durstenfeld.<br><br>
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* Time complexity: O(N).
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*
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* @example
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* var shuffle = require('path-to-algorithms/src/shuffle' +
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* '/richarddurstenfeld').shuffle;
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* console.log(shuffle([1, 2, 3, 4, 5])); // random shuffled
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*
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* @public
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* @module shuffle/richarddurstenfeld
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* @param {Array} array An array which should be shuffled.
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* @return {Array} Shuffled array.
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*/
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function shuffle(array) {
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var arraySize = array.length - 1;
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var rand;
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var temp;
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for (var i = arraySize; i >= 0; i -= 1) {
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rand = Math.round(Math.random() * arraySize);
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temp = array[i];
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array[i] = array[rand];
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array[rand] = temp;
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}
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return array;
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}
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exports.shuffle = shuffle;
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}(typeof exports === 'undefined' ? window : exports));
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