#

API Documentation for: NEXT
Show: Inherited Protected Private Deprecated

# File:IndexOf.js

    /*
    * IndexOf
    * Visit http://createjs.com/ for documentation, updates and examples.
    *
    * Copyright (c) 2010 gskinner.com, inc.
    *
    * Permission is hereby granted, free of charge, to any person
    * obtaining a copy of this software and associated documentation
    * files (the "Software"), to deal in the Software without
    * restriction, including without limitation the rights to use,
    * copy, modify, merge, publish, distribute, sublicense, and/or sell
    * copies of the Software, and to permit persons to whom the
    * Software is furnished to do so, subject to the following
    * conditions:
    *
    * The above copyright notice and this permission notice shall be
    * included in all copies or substantial portions of the Software.
    *
    * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
    * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
    * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
    * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
    * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
    * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
    * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
    * OTHER DEALINGS IN THE SOFTWARE.
    */

    /**
      * @module CreateJS
     */

    // namespace:
    this.createjs = this.createjs||{};

    /**
     * @class Utility Methods
     */
    (function() {
    	"use strict";

    	/*
    	 * Employs Duff's Device to make a more performant implementation of indexOf.
    	 * see http://jsperf.com/duffs-indexof/2
    	 * #method indexOf
    	 * @param {Array} array Array to search for searchElement
    	 * @param searchElement Element to search array for.
    	 * @return {Number} The position of the first occurrence of a specified value searchElement in the passed in array ar.
    	 * @constructor
    	 */
    	/* replaced with simple for loop for now, perhaps will be researched further
    	createjs.indexOf = function (ar, searchElement) {
    		var l = ar.length;

    		var n = (l * 0.125) ^ 0;	// 0.125 == 1/8, using multiplication because it's faster in some browsers	// ^0 floors result
    		for (var i = 0; i < n; i++) {
    			if(searchElement === ar[i*8])   { return (i*8);}
    			if(searchElement === ar[i*8+1]) { return (i*8+1);}
    			if(searchElement === ar[i*8+2]) { return (i*8+2);}
    			if(searchElement === ar[i*8+3]) { return (i*8+3);}
    			if(searchElement === ar[i*8+4]) { return (i*8+4);}
    			if(searchElement === ar[i*8+5]) { return (i*8+5);}
    			if(searchElement === ar[i*8+6]) { return (i*8+6);}
    			if(searchElement === ar[i*8+7]) { return (i*8+7);}
    		}

    		var n = l % 8;
    		for (var i = 0; i < n; i++) {
    			if (searchElement === ar[l-n+i]) {
    				return l-n+i;
    			}
    		}

    		return -1;
    	}
    	*/

    	/**
    	 * Finds the first occurrence of a specified value searchElement in the passed in array, and returns the index of
    	 * that value.  Returns -1 if value is not found.
    	 *
    	 *      var i = createjs.indexOf(myArray, myElementToFind);
    	 *
    	 * @method indexOf
    	 * @param {Array} array Array to search for searchElement
    	 * @param searchElement Element to find in array.
    	 * @return {Number} The first index of searchElement in array.
    	 */
    	createjs.indexOf = function (array, searchElement){
    		for (var i = 0,l=array.length; i < l; i++) {
    			if (searchElement === array[i]) {
    				return i;
    			}
    		}
    		return -1;
    	}

    }());