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Copy an object of an array in the same array?

Conrado ZAVALA
on
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Last Modified: 2014-09-01
Dear Experts,

I was wondering on how to make a exact copy of an object (index) of an array inside the same array.
For example:

I got this array:
array[0] = { id: gr, name: green, number: 1};
array[1] = { id: rd, name: red, number: 2};
array[2] = { id: bl, name: blue, number: 3};

and I want to make an exact copy of array[2] in the same array.
In other words, what I want to do is to add 1 object to the array (array[3]) with exactly the same info of array[2].

so at the end the array will be:
array[0] = { id: gr, name: green, number: 1};
array[1] = { id: rd, name: red, number: 2};
array[2] = { id: bl, name: blue, number: 3};
array[3] = { id: bl, name: blue, number: 3};

It's that possible?

Thanks in Advance.

Best Regards.
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trinitrotolueneDirector - Software Engineering
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Author

Commented:
Thank you very much for the help!
RobOwner (Aidellio)
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Commented:
Conradozavala,

You are aware that changing the id of say array[2], will also change array[3]?

http://jsfiddle.net/rjurd/a16x1j88/2/
RobOwner (Aidellio)
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Commented:
More to reinforce what trinitrotoluene has said about objects getting passed by reference and not value.

Author

Commented:
Hi Rob,

I've noticed that already.

That's a really big problem, I want to copy the exact array element but after that I change the info of that element or index, but is changing the previous element too.

So is there a way to copy the element without having this problem?
to have different elements with different information?

Thank you very much for your help.

Best Regards.
leakim971Multitechnician
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Distinguished Expert 2019

Commented:
var array = [];
array[0] = { id: "gr", name: "green", number: 1};
array.push({ id: "rd", name: "red", number: 2});
array[2] = { id: "bl", name: "blue", number: 3};
var clone = {};
for(var j in array[2]) {
    clone[j] = array[2][j];
}
array.push(clone);

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