changing downkeys to internal var

Author: Lauren McCarthy

lib/p5.js

@@ -1,4 +1,4 @@
-/*! p5.js v0.3.13 December 01, 2014 */
+/*! p5.js v0.3.13 December 03, 2014 */
 var shim = function (require) {
     window.requestDraw = function () {
       return window.requestAnimationFrame || window.webkitRequestAnimationFrame || window.mozRequestAnimationFrame || window.oRequestAnimationFrame || window.msRequestAnimationFrame || function (callback, element) {
@@ -3000,7 +3000,7 @@ var inputfiles = function (require, core, reqwest) {
 var inputkeyboard = function (require, core) {
     'use strict';
     var p5 = core;
-    p5.prototype._downKeys = [];
+    var downKeys = {};
     p5.prototype.isKeyPressed = false;
     p5.prototype.keyIsPressed = false;
     p5.prototype.key = '';
@@ -3009,9 +3009,7 @@ var inputkeyboard = function (require, core) {
       this._setProperty('isKeyPressed', true);
       this._setProperty('keyIsPressed', true);
       this._setProperty('keyCode', e.which);
-      if (this._downKeys.indexOf(e.which) < 0) {
-        this._downKeys.push(e.which);
-      }
+      downKeys[e.which] = true;
       var key = String.fromCharCode(e.which);
       if (!key) {
         key = e.which;
@@ -3029,9 +3027,7 @@ var inputkeyboard = function (require, core) {
       var keyReleased = this.keyReleased || window.keyReleased;
       this._setProperty('isKeyPressed', false);
       this._setProperty('keyIsPressed', false);
-      if (this._downKeys.indexOf(e.which) >= 0) {
-        this._downKeys.splice(this._downKeys.indexOf(e.which), 1);
-      }
+      downKeys[e.which] = false;
       var key = String.fromCharCode(e.which);
       if (!key) {
         key = e.which;
@@ -3057,7 +3053,7 @@ var inputkeyboard = function (require, core) {
       }
     };
     p5.prototype.keyIsDown = function (code) {
-      return this._downKeys.indexOf(code) >= 0;
+      return downKeys[code];
     };
     return p5;
   }({}, core);