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copied!<p>Monkey patching is not ruby-explicit, its done all over javascript too, with negative (IMO) effects.</p> <p>My personal opinion is monkey patching should only be done to </p> <p>a) Add functionality to an old version of a language which is available in the new version of the language which you need. </p> <p>b) When there is no other "logical" place for it. </p> <p>There are many many easy ways to make monkey patching really awful, such as the ability to change how basic functions such as <em>ADDITION</em> work. </p> <p>My stance is, if you can avoid it, do so. </p> <p>If you can avoid it in a nice way, kudos to you. </p> <p>If you can't avoid it, get the opinion of 200 people because you probably just have not thought about it hard enough. </p> <p><strong>My pet hate</strong> is mootools extending the <strong>function</strong> object. Yes, you can do this. Instead of people just learning how javascript works: </p> <pre><code>setTimeout(function(){ foo(args); }, 5000 ); </code></pre> <p>There was added a new method to every function object, ( yes, im not joking ) so that functions now have their own functions. </p> <pre><code>foo.delay( 5000 , args ); </code></pre> <p>Which had the additional effect of this sort of crap being valid: </p> <pre><code>foo.delay.delay( 500, [ 500, args ] ); </code></pre> <p>And on like that ad infinitum. </p> <p>The result? You no longer have a library, and a language, your langauge bows to the library and if the library happens to be in scope, you no longer have a language, and you cant just do things the way that they were done when you learn the language, and instead have to learn a <strong>new</strong> subset of commands just to not have it fall flat on its face ( at the cost of excessive slowdowns! )</p> <p><sub> may i note that foo.delay also returned an object, with its own methods, so you could do </p> <pre><code>x = foo.delay( 500, args ); x.clear(); </code></pre> <p>and even </p> <pre><code> x.clear.delay(10); </code></pre> <p>which may sound overly useful, ... but you have to take into consideration the massive overhead used to make this viable. </p> <pre><code> clearTimeout(x); </code></pre> <p>SO HARD!</p> <p><b>(Disclaimer: its been a while since I used moo, and have tried to forget it, and function names/structure may be incorrect. This is not an API reference. Please check their site for details ( sorry, their API reference sucks! )) </b> </sub></p>

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