brendan at mozilla.com
Thu Mar 12 14:04:19 PDT 2009
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.
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"?!).
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