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POPseudo-classical vs. "The JavaScript way"
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  1. POPseudo-classical vs. "The JavaScript way"
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    copied!<p>Just finished reading Crockford's "<strong><a href="http://oreilly.com/catalog/9780596517748/" rel="noreferrer">JavaScript: The Good Parts</a></strong>" and I have a question concerning his stance on the psuedo-classical vs. prototypal approaches. Actually I'm not really interested in his stance; I just want to understand his argument so I can establish a stance of my own.</p> <p>In the book, Crockford seems to infer that constructor functions and "all that jazz" shouldn't be used in JavaScript, he mentions how the 'new' keyword is badly implemented - i.e. non-Constructor functions can be called with the 'new' keyword and vice versa (potentially causing problems).</p> <p>I thought I understood where he was coming from but I guess I don't.</p> <p>When I need to create a new module I would normally start of like this:</p> <pre><code>function MyModule(something) { this.something = something || {}; } </code></pre> <p>And then I would add some methods to its prototype:</p> <pre><code>MyModule.prototype = { setSomething : function(){}, getSomething : function(){}, doSomething : function(){} } </code></pre> <p>I like this model; it means I can create a new instance whenever I need one and it has its own properties and methods:</p> <pre><code>var foo = new MyModule({option1: 'bar'}); // Foo is an object; I can do anything to it; all methods of the "class" // are available to this instance. </code></pre> <p><strong>My question is</strong>: How do I achieve the above using an approach more suited to JavaScript? In other words, if "JavaScript" were a person, what would she suggest?</p> <p>Also: What does Crockford mean when he says a particular design pattern "is more expressive" then another?</p>
 

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