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    <p>This is how I would do it... I'd set those who are listening. <code>listening</code> is an optional parameter when you create a new object. You can also change those who are listening after creation using <code>setListening</code>. <code>listening</code> in this case will just be an array of objects that have a <code>name</code> property.</p> <p>Also, I fixed some issues, you either didn't have "name" or weren't setting it in any case.</p> <p><a href="http://jsfiddle.net/n9xCM/" rel="nofollow">http://jsfiddle.net/n9xCM/</a></p> <pre><code>var animal = function (name, sound, listening) { var f = 0; this.name = name; // this.prop means prop is public var. this.sound = sound; this.listening = listening; this.makesound = function () { alert(this.sound); this.listen(); } this.setListening = function (listening) { this.listening = listening; } this.listen = function () { console.log("in listen ("+this.listening.length+")"); for (var i = 0; i &lt; this.listening.length; i++) { alert(this.listening[i].name + " heard that"); } } return this; }; /*--------------- inheritance -----------------------------------*/ var cat = function (name, listening) { this.name = name; this.listening = listening; this.sound = 'meow'; return this; }; cat.prototype = new animal(); function dog(name, listening) { this.sound = 'woof'; this.listening = listening; this.name = name; return this; }; dog.prototype = new animal(); /*-------- different kinda dogs/cats ----------------------------*/ var myDog = new dog("mydog"); var myCat = new cat("mycat", [myDog]); var bigDog = new dog("buster"); var tomCat = new cat("tommy", [bigDog]); myCat.makesound(); //meow - mydog heard that bigDog.setListening([myDog, myCat, tomCat]); bigDog.makesound(); //woof - mydog/mycat/tommy heard that /*-----------------------*/ </code></pre>
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    1. POHow to create listeners with javascript
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    1. COThanks guys if I had more rep I would upvote! you two this heled a lot. Also I can google observer pattern and figure it out that helps :)
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      1. USRyan Williams
    2. COHey Ryan, you can still select an answer by clicking the check mark under the up/down votes
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    3. COoh I didn't know that okay, really i like them both though!
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