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POHow can I call a function stored in an object that is being used as an argument for another function?
 

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  1. POHow can I call a function stored in an object that is being used as an argument for another function?
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    <p>I'll be honest, I'm in way over my head with this one. Any help would be appreciated.</p> <p><strong>OBJECTIVE</strong></p> <p>I want to call a function called restart, but the function is inside an object and is being passed to a function <code>Class.extend</code>.</p> <p>The code I'm working with is</p> <pre><code> var Chickenz = Class.extend( { init: function(value) { //do something }, // restart game restart: function() { this.score.restart(); //etc } }); </code></pre> <p>What have I tried?</p> <p><code>restart();</code> Doesn't work. I get <code>TypeError: restart is not a function</code> No biggy I didn't expect it to work. Based on this question > <a href="https://stackoverflow.com/questions/8902687/javascript-storing-function-in-object-bad-practice">Javascript - Storing function in object - bad practice?</a> I thought I could do something like <code>Chickenz.restart();</code> but it's more complicated, because of Class.extend</p> <p>I've included code for Class.extend towards the bottom of this question.</p> <p>Later the restart function is called with the following code</p> <pre><code>/* GUI Events */ // restart button addEvent($("restart"), "click", function() { self.restart(); return false; }); </code></pre> <p>I thought I would try <code>self.restart();</code> but that didn't work- <code>TypeError: self.restart is not a function.</code></p> <p><strong>So my question.</strong> </p> <p>How can I call the restart function?</p> <p><strong>CODE for Class.extend</strong></p> <pre><code>var initializing = false; // The base Class implementation (does nothing) this.Class = function(){}; // Create a new Class that inherits from this class // Create a new Class that inherits from this class Class.extend = function(prop) { var _super = this.prototype, prototype, name, tmp, ret; // Instantiate a base class (but only create the instance, // don't run the init constructor) initializing = true; prototype = new this(); initializing = false; // Copy the properties over onto the new prototype for ( name in prop ) { // Check if we're overwriting an existing function prototype[name] = typeof prop[name] == "function" &amp;&amp; typeof _super[name] == "function" ? (function(name, fn){ return function() { tmp = this._super; // Add a new ._super() method that is the same method // but on the super-class this._super = _super[name]; // The method only need to be bound temporarily, so we // remove it when we're done executing ret = fn.apply(this, arguments); this._super = tmp; return ret; }; })(name, prop[name]) : prop[name]; } // The dummy class constructor //Changed according to http://ejohn.org/blog/simple-class-instantiation/ //Use the new operator to instantiation function Class(args){ if ( this instanceof arguments.callee ) { if ( !initializing &amp;&amp; this.init ) this.init.apply( this, args.callee ? args : arguments ); } else return new arguments.callee( arguments ); }; // Populate our constructed prototype object Class.prototype = prototype; // Enforce the constructor to be what we expect Class.constructor = Class; // And make this class extendable Class.extend = arguments.callee; return Class; }; </code></pre>
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