Question

73

How to check identical array in most efficient way?

rated 0 times [ 77] [ 4] / answers: 1 / hits: 119667 / 14 Years ago, tue, october 26, 2010, 12:00:00

I want to check if the two arrays are identical
(not content wise, but in exact order).

For example:

 array1 = [1,2,3,4,5]

 array2 = [1,2,3,4,5]

 array3 = [3,5,1,2,4]

Array 1 and 2 are identical but 3 is not.

Is there a good way to do this in JavaScript?

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tyreese

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answered 14 Years ago dorothylorrainef · Accepted Answer

So, what's wrong with checking each element iteratively?

function arraysEqual(arr1, arr2) {

    if(arr1.length !== arr2.length)

        return false;

    for(var i = arr1.length; i--;) {

        if(arr1[i] !== arr2[i])

            return false;

    }



    return true;

}