phaser/src/utils/array/MoveUp.js

A fast, free and fun HTML5 Game Framework for Desktop and Mobile web browsers from the team at Phaser Studio Inc.

/**
 * @author       Richard Davey <rich@phaser.io>
 * @copyright    2013-2025 Phaser Studio Inc.
 * @license      {@link https://opensource.org/licenses/MIT|MIT License}
 */

/**
 * Moves the given array element up one place in the array.
 * The array is modified in-place.
 *
 * @function Phaser.Utils.Array.MoveUp
 * @since 3.4.0
 *
 * @param {array} array - The input array.
 * @param {*} item - The element to move up the array.
 *
 * @return {array} The input array.
 */
var MoveUp = function (array, item)
{
    var currentIndex = array.indexOf(item);

    if (currentIndex !== -1 && currentIndex < array.length - 1)
    {
        //  The element one above `item` in the array
        var item2 = array[currentIndex + 1];
        var index2 = array.indexOf(item2);

        array[currentIndex] = item2;
        array[index2] = item;
    }

    return array;
};

module.exports = MoveUp;