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GetRandomElement.js
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29 lines (25 loc) · 926 Bytes
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/**
* @author Richard Davey <rich@photonstorm.com>
* @copyright 2018 Photon Storm Ltd.
* @license {@link https://github.com/photonstorm/phaser/blob/master/license.txt|MIT License}
*/
/**
* [description]
*
* @function Phaser.Utils.Array.GetRandomElement
* @since 3.0.0
*
* @param {array} array - The array to select the random entry from.
* @param {integer} [start=0] - [description]
* @param {integer} [length=array.length] - [description]
*
* @return {object} A random element from the array, or `null` if no element could be found in the range given.
*/
var GetRandomElement = function (array, start, length)
{
if (start === undefined) { start = 0; }
if (length === undefined) { length = array.length; }
var randomIndex = start + Math.floor(Math.random() * length);
return (array[randomIndex] === undefined) ? null : array[randomIndex];
};
module.exports = GetRandomElement;