New array overwriting the global array

Question

I have a global array like:

var myArray = [];

And there are various elements in it. I need to create a new array with the same content and then modify it like this:

newArray = myArray;
newArray = newArray.reverse();

However, when I do this, it changes both myArray and newArray.

What am I doing wrong?

Thank!

+3

FirstLegion 13 nov. '14 at 6:36

1 answer

Sampath liyanage · Accepted Answer · 2014-11-13T06:41:16+0000

This is because both arrays refer to the same object. To get rid of it, you must clone it with a slice.

var myArray = [1,2];
var newArray = myArray.slice(0)
newArray.reverse();