javascript - Compare 2 arrays which returns difference -

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what's fastest/best way compare 2 arrays , return difference? array_diff in php. there easy function or going have create 1 via each()? or foreach loop?

working demo http://jsfiddle.net/u9xes/

good link (jquery documentation): http://docs.jquery.com/main_page {you can search or read apis here}

hope if looking in jquery.

the alert in end prompts array of uncommon element array i.e. difference between 2 array.

please lemme know if missed anything, cheers!

code

var array1 = [1, 2, 3, 4, 5, 6]; var array2 = [1, 2, 3, 4, 5, 6, 7, 8, 9]; var difference = [];  jquery.grep(array2, function(el) {         if (jquery.inarray(el, array1) == -1) difference.push(el); });  alert(" difference " + difference);​ // changed variable name

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