A few more thoughts...
On Nov 13, 2011, at 5:08 AM, Jake Verbaten <rayn...@gmail.com> wrote:
>
>
> Neither of them are fit for standardization. Selfish and Prototype are both
> incapable of correctly "deep copying" arrays or objects,
>
> Why does it matter that they don't deep copy? Deep copying is a difficult
> problem that needs to be standardized separately. I've personally avoided
> deep copying for this reason and don't use it anymore.
>
> One can accept that an extend is merely a shallow copy properties by
> reference, because this (although limited) behavior is easy to understand.
Shallow copy is only good for one level of property lists whose assignment
expressions are all primitive, anything that is a reference is going to allow
the destination to mutate the source, this is wrong.
>
> I have a version of Object.extend that is a "shallow own merge".
>
> However having a deep copy mechanism that works without obscure edge-cases
> would be great.
Can you be specific? What obscure edge cases have you previously encountered?
> Of course it would be nice if we had the choice of deep vs shallow copy
> within the API.
Agreed
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