Question

171

rated 0 times [ 174] [ 3] / answers: 1 / hits: 36062 / 12 Years ago, thu, january 24, 2013, 12:00:00

I'm trying to create a copy of existing array and remove some items from array copy without impacting the original. I've tried this :

var new_arr = old_arr; //when I remove from new array the items from old array are also removed

How do I create entirely new copy of the existing array?

Update :

When I do this :

var new_arr = old_arr.slice();

then later :

new_arr[0].shift();

new_arr[1].shift();

The items from old_array get removed. This is a two dimensional array.

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4 Years ago

answered 12 Years ago nikokorbinm · Accepted Answer

You can use two methods, this:

function clone (src) {

    return JSON.parse(JSON.stringify(src));

}

or this:

var newArray = oldArray.slice();