merging array in javascript -

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this question has answer here:

is there way merge following array :

var arr = [["2014-2-5", "2014-2-4", "2014-1-9", "2014-1-8"], [], ["2014-2-4"], [], []]

and make :

["2014-2-5", "2014-2-4", "2014-1-9", "2014-1-8", "2014-2-4"]

i tried console.log($.merge(arr )); not working.

thanks

use array's reduce in combination concat:

arr.reduce(function(previousvalue, currentvalue, index, array){   return previousvalue.concat(currentvalue); });

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