Quick tip: A closer look at jQuery - Grep

In the latest episode of "Anatomy of jQuery," we'll lift the lid on $.grep and see exactly what's going on behind the scenes.

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grepjQuery source

// jQuery source for the grep method grep: function( elems, callback, inv ) { var ret = []; // Go through the array, only saving the items // that pass the validator function for ( var i = 0, length = elems.length; i < length; i++ ) { if ( !inv !== !callback( elems[ i ], i ) ) { ret.push( elems[ i ] ); } } return ret; }

Hopefully you now have a better understanding of what's going on behind the scenes. Remember: any time you need to remove items from an array, $.grep will do the job just fine!

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