Cloning JSON not working as expected

Question

I have a JSON literal as follows:

var json_1 = {
    "name": "Tim",
    "toys": ["ball", "bat", "lego"]
};

Now I clone this as follows:

var json_2 = json_1;

If I remove a toy from json_1 (using splice())the same seems to be getting removed from json_2. How do I create a copy without them being dependent on each other?

That's ***not*** a "JSON literal". It's an "**object** literal". It has *nothing* to do whatsoever with JSON. — gen_Eric, Mar 21 '13 at 17:41
This is not JSON. This is a javascript object using the object literal syntax. — John Dvorak, Mar 21 '13 at 17:41

score 5 · Accepted Answer · edited May 23 '17 at 12:15

5

When you do:

var json_2 = json_1

you're actually not "cloning" the object you're merely aliasing it. So all operation on json_1 will be mirrored on json_2 and vice versa. To really clone your object take a look at: https://stackoverflow.com/a/728694/2003420

edited May 23 '17 at 12:15

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answered Mar 21 '13 at 17:40

El Bert

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Cloning JSON not working as expected

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