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  1. PO
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    <p>I think the main issue is in the prototype of Gentlemen. For one you are overwriting the prototype youve inherited from Human, for another you are using = instead of : to assign the functions :)</p> <p>Try this:</p> <pre><code> var People = People || {}; People = (function() { var _people = []; var People = function(){}; var addGentleman = function (name) { _people.push(new People.Gentleman(name)); }; var getList = function () { var temp = []; for (var i = 0; i &lt; _people.length; i++) { temp.push(_people[i].toString()); } return temp; }; People.prototype = { constructor: People, addGentleman: addGentleman, getList: getList }; return People; })(); People.Human = (function () { this._name; var Human = function (name) { this._name = name; }; Human.prototype = { constructor: Human, }; return Human; })(); People.Gentleman = (function () { var Gentleman = function (name) { People.Human.call(this, name); } var toString = function () { return 'Mr. ' + this._name; }; Gentleman.prototype = Object.create(People.Human.prototype); Gentleman.prototype.constructor = Gentleman; Gentleman.prototype.toString = toString; return Gentleman; })(); $(function () { var people = new People(); people.addGentleman('Viktor'); // this is me people.addGentleman('Joakim'); // and my friend! var list = people.getList(); var $ul = $('#people'); for (var i = 0; i &lt; list.length; i++) { $ul.append('&lt;li&gt;' + list[i] + '&lt;/li&gt;'); } }); </code></pre> <p>You can see that I have added the new toString method to the prototype object rather than overwriting whats already there. I dont know if the pattern has a nicer way to do this (im not familiar with it).</p> <p>You could do this if it seems more appropriate:</p> <pre><code>Gentleman.prototype = Object.create(People.Human.prototype, { constructor : { configurable: true, get : function() { return Gentleman } }, toString : { configurable: true, get : function() { return toString } } }); </code></pre>
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    1. POGrasping "OOP" JavaScript: module pattern with inheritance
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    1. USTom Elmore
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    1. COAha, so I've got to use the `prototype.` notation and not `prototype = {}` because then I'm overwriting?
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      1. USViktor
    2. COyup - so when you do the second assignment it just overwrites the object reference that you set in the previous line. Reading zeroflags link you could also add in the extra properties using the object.create() - ill update with an example
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      1. USTom Elmore
    3. COOkay! I've updated my example with yet another `Human` method, but this is not abstract. Would you care to update my fiddle so that it works? I get the overwriting and I am therefore using your first solution.
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