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Integralist/Quick 'n' Dirty Array.indexOf

Created July 12, 2011 08:12
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Cheap 'inArray' trick by @ded
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Quick 'n' Dirty Array.indexOf
/*
* jsFiddle: http://jsfiddle.net/integralist/fL2Xv/
* Original: http://twitter.com/#!/ded/status/90531502097575936
*/
if (!Array.prototype.indexOf) {
Array.prototype.indexOf = function(item) {
return ( Math.abs( ~this.indexOf(item) ) )-1;
}
}
@mathiasbynens
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if (!Array.prototype.indexOf) {} could be shortened to if (![].indexOf) {}.

@Integralist
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Yep, I probably would do that in a production script, but for the purpose of example it just makes it clearer (in my opinion).

Not that [].indexOf is more complicated or confusing in any way I just find the long winded route more appropriate for examples like this :-)

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