shuffle-array

<!doctype html> <html lang="en"> <head> <title>Code coverage report for shuffle-array/index.js</title> <meta charset="utf-8" /> <link rel="stylesheet" href="../prettify.css" /> <link rel="stylesheet" href="../base.css" /> <meta name="viewport" content="width=device-width, initial-scale=1"> <style type='text/css'> .coverage-summary .sorter { background-image: url(../sort-arrow-sprite.png); } </style> </head> <body> <div class='wrapper'> <div class='pad1'> <h1> <a href="../index.html">all files</a> / <a href="index.html">shuffle-array/</a> index.js </h1> <div class='clearfix'> <div class='fl pad1y space-right2'> 100% Statements 30/30 </div> <div class='fl pad1y space-right2'> 100% Branches 22/22 </div> <div class='fl pad1y space-right2'> 100% Functions 2/2 </div> <div class='fl pad1y space-right2'> 100% Lines 30/30 </div> </div> </div> <div class='status-line high'></div> <pre><table class="coverage"> <tr><td class="line-count quiet">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</td><td class="line-coverage quiet">                    1×   6× 4×     2×   2×           2× 1×     2× 10× 10× 10× 10× 10×     2×                     1×   4× 1×     3×   3×     3× 2×         2× 7× 7× 7× 7× 7×     2×     1×           1×  </td><td class="text"><pre class="prettyprint lang-js">'use strict';   /** * Randomize the order of the elements in a given array. * @param {Array} arr - The given array. * @param {Object} [options] - Optional configuration options. * @param {Boolean} [options.copy] - Sets if should return a shuffled copy of the given array. By default it's a falsy value. * @param {Function} [options.rng] - Specifies a custom random number generator. * @returns {Array} */ function shuffle(arr, options) {   if (!Array.isArray(arr)) { throw new Error('shuffle expect an array as parameter.'); }   options = options || {};   var collection = arr, len = arr.length, rng = options.rng || Math.random, random, temp;   if (options.copy === true) { collection = arr.slice(); }   while (len) { random = Math.floor(rng() * len); len -= 1; temp = collection[len]; collection[len] = collection[random]; collection[random] = temp; }   return collection; };   /** * Pick one or more random elements from the given array. * @param {Array} arr - The given array. * @param {Object} [options] - Optional configuration options. * @param {Number} [options.picks] - Specifies how many random elements you want to pick. By default it picks 1. * @param {Function} [options.rng] - Specifies a custom random number generator. * @returns {Object} */ shuffle.pick = function(arr, options) {   if (!Array.isArray(arr)) { throw new Error('shuffle.pick() expect an array as parameter.'); }   options = options || {};   var rng = options.rng || Math.random, picks = options.picks || 1;   if (typeof picks === 'number' && picks !== 1) { var len = arr.length, collection = arr.slice(), random = [], index;   while (picks && len) { index = Math.floor(rng() * len); random.push(collection[index]); collection.splice(index, 1); len -= 1; picks -= 1; }   return random; }   return arr[Math.floor(rng() * arr.length)]; };   /** * Expose */ module.exports = shuffle;  </pre></td></tr> </table></pre> <div class='push'></div> </div> <div class='footer quiet pad2 space-top1 center small'> Code coverage generated by <a href="http://istanbul-js.org/" target="_blank">istanbul</a> at Wed Feb 15 2017 22:42:54 GMT-0300 (ART) </div> </div> <script src="../prettify.js"></script> <script> window.onload = function () { if (typeof prettyPrint === 'function') { prettyPrint(); } }; </script> <script src="../sorter.js"></script> </body> </html>