getOwnPropertySymbols + getOwnPropertyNames

# Axel Rauschmayer (12 years ago)

rwaldron/tc39-notes/blob/master/es6/2013-09/sept-18.md#consensusresolution-1

Honest question: Is there any use case where you would not want to iterate over both?

If yes then I’d prefer to have getOwnPropertyKeys (in addition or instead of getOwnPropertySymbols).

https://github.com/rwaldron/tc39-notes/blob/master/es6/2013-09/sept-18.md#consensusresolution-1

Honest question: Is there any use case where you would *not* want to iterate over both?

If yes then I’d prefer to have getOwnPropertyKeys (in addition or instead of getOwnPropertySymbols).

Axel

-- 
Dr. Axel Rauschmayer
axel at rauschma.de

home: rauschma.de
twitter: twitter.com/rauschma
blog: 2ality.com



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# Andrea Giammarchi (12 years ago)

I hope in addiction, since at least getOwnPropertyNames is slightly polyfillable ... having only a method that exposes both makes migration more painful, imho

I hope in addiction, since at least getOwnPropertyNames is slightly
polyfillable ... having only a method that exposes both makes migration
more painful, imho


On Sun, Dec 22, 2013 at 7:52 AM, Axel Rauschmayer <axel at rauschma.de> wrote:

>
> https://github.com/rwaldron/tc39-notes/blob/master/es6/2013-09/sept-18.md#consensusresolution-1
>
> Honest question: Is there any use case where you would *not* want to
> iterate over both?
>
> If yes then I’d prefer to have getOwnPropertyKeys (in addition or instead
> of getOwnPropertySymbols).
>
> Axel
>
> --
> Dr. Axel Rauschmayer
> axel at rauschma.de
>
> home: rauschma.de
> twitter: twitter.com/rauschma
> blog: 2ality.com
>
>
>
>
> _______________________________________________
> es-discuss mailing list
> es-discuss at mozilla.org
> https://mail.mozilla.org/listinfo/es-discuss
>
>
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# Jeff Morrison (12 years ago)

IIRC the purpose of separating the two was to encourage the idea that you should not normally iterate over both (because symbols will often be used to publicly obfuscate properties on an object).

Originally symbol keys were not enumerable at all. However it was hard to show that enumerating symbols should "never" happen -- and so a separate api was made to make it possible-but-more-inconvenient.

IIRC the purpose of separating the two was to encourage the idea that 
you should not normally iterate over both (because symbols will often be 
used to publicly obfuscate properties on an object).

Originally symbol keys were not enumerable at all. However it was hard 
to show that enumerating symbols should "never" happen -- and so a 
separate api was made to make it possible-but-more-inconvenient.

-Jeff

On 12/22/13, 7:52 AM, Axel Rauschmayer wrote:
> https://github.com/rwaldron/tc39-notes/blob/master/es6/2013-09/sept-18.md#consensusresolution-1
>
> Honest question: Is there any use case where you would *not* want to 
> iterate over both?
>
> If yes then I'd prefer to have getOwnPropertyKeys (in addition or 
> instead of getOwnPropertySymbols).
>
> Axel
>
> -- 
> Dr. Axel Rauschmayer
> axel at rauschma.de <mailto:axel at rauschma.de>
>
> home: rauschma.de <http://rauschma.de/>
> twitter: twitter.com/rauschma <http://twitter.com/rauschma>
> blog: 2ality.com <http://2ality.com/>
>
>
>
>
>
> _______________________________________________
> es-discuss mailing list
> es-discuss at mozilla.org
> https://mail.mozilla.org/listinfo/es-discuss

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