Object.getOwnPropertyDescriptors(O) ? // plural

[Andrea Giammarchi]

autocomplete misspelled Andre' , apologies


On Thu, Mar 6, 2014 at 2:34 PM, Andrea Giammarchi <
andrea.giammarchi at gmail.com> wrote:

> Thanks Andrew, I wonder if I should update the proposed spec somehow, but
> I thought as it is combines both Names and Symbols as abstract.
>
> Please let me know and I'll update.
>
> Best Regards
>
>
> On Thu, Mar 6, 2014 at 1:21 PM, André Bargull <andre.bargull at udo.edu>wrote:
>
>>  I would rephrase into this:
>>
>> if you need a getOwnPropertyNames trap, you might need for consistency a
>> getOwnPropertySymbols independently from getOwnPropertyDescriptors since
>> these methods are already available.
>>
>>
>> While it shares the same name with Object.getOwnPropertyNames(), this
>> getOwnPropertyNames trap is supposed to return string and symbol keyed
>> properties, see http://esdiscuss.org/topic/ownpropertykeys .
>>
>>
>>
>>  I also would like to add a couple of links to support the fact
>> getOwnPropertyDescriptors
>> is needed, and has been asked for, since quite a while: this was 11th of
>> November 2011 ... I didn't know it, and now that I do I wonder why this has
>> been post-poned for so long and never discussed again.
>> https://mail.mozilla.org/pipermail/es-discuss/2011-November/018275.html
>>
>>
>> Or even earlier,
>> http://wiki.ecmascript.org/doku.php?id=strawman:extended_object_api from
>> 2010.
>>
>>
>>  Best Regards
>>
>>
>> On Thu, Mar 6, 2014 at 11:24 AM, C. Scott Ananian <ecmascript at cscott.net <https://mail.mozilla.org/listinfo/es-discuss>>wrote:
>>
>> >* If you use a getOwnPropertyNames trap, then you also need a
>> *
>> >* getOwnPropertySymbols trap to implement getOwnPropertyDescriptors.
>> *>*  --scott
>> *>
>> >* On Thu, Mar 6, 2014 at 2:16 AM, Tom Van Cutsem <tomvc.be at gmail.com <https://mail.mozilla.org/listinfo/es-discuss>> wrote:
>> *>* > 2014-03-05 20:11 GMT+01:00 C. Scott Ananian <ecmascript at cscott.net <https://mail.mozilla.org/listinfo/es-discuss>>:
>> *>* >>
>> *>* >> On Wed, Mar 5, 2014 at 1:39 PM, Tom Van Cutsem <tomvc.be at gmail.com <https://mail.mozilla.org/listinfo/es-discuss>>
>> *
>> >* wrote:
>> *>* >> > Object.getOwnPropertyDescriptors(proxy) would trigger the
>> *>* >> > getOwnPropertyNames trap, followed by calls to the
>> *>* >> > getOwnPropertyDescriptor
>> *>* >> > trap for each individual property.
>> *>* >>
>> *>* >> [[OwnPropertyKeys]], `ownKeys` trap.
>> *>* >
>> *>* >
>> *>* > Yes, according to the current draft spec. I have a pending discussion
>> *>* with
>> *>* > Allen that we actually need to reintroduce a [[GetOwnPropertyNames]]
>> *>* > internal method / getOwnPropertyNames trap, as the `ownKeys` trap
>> *>* doesn't do
>> *>* > any invariant checking, which is needed for a reliable Object.isFrozen
>> *>* test.
>> *>* >
>> *>* > Regards,
>> *>* > Tom
>> *>
>>
>>
>
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