P T Withington
ptw at pobox.com
Thu Mar 12 14:23:55 PDT 2009
On 2009-03-12, at 17:04EDT, Brendan Eich wrote:
> On Mar 12, 2009, at 1:54 PM, P T Withington wrote:
>> But, I would very much like to see a standard way to discover an
>> Object's constructor, and a way to enumerate _all_ the properties
>> of an object. I know there is a tension between security and
>> introspection. I don't know if this is something that can be
>> handled by the presumably already-overloaded strict mode.
> ES3.1 has Object.getOwnPropertyNames and
> Object.getOwnPropertyDescriptor, so you can go to town with those.
Excellent. I almost guessed correctly, I called it
> Identifying the constructor is harder. Having to slice a substring
> out of Object.prototype.toString.call(obj) is disgusting, but it
> kind of works. Not sure about all the various non-standard class
> names formatted that way (IE calls DOM classes "Object"?!).
So, why can't we standardize the `constructor` property, that seems to
exist in some implementations, to actually return the constructor of
the object (and not the constructor of the object's prototype, which
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