I think `[mixin1, mixin2, mixin3].reduce(Object.mixin, source);` is a win,
only thing I am not sure, is how this third argument could make into this
approach (if reusable, I didn't even know about this extra arg)
Any hint on the extra arg appreciated for polyfill purpose, thanks
On Wed, May 22, 2013 at 6:00 PM, Dmitry Soshnikov <
dmitry.soshni...@gmail.com> wrote:
>
> On Wed, May 22, 2013 at 5:53 PM, Rick Waldron <waldron.r...@gmail.com>wrote:
>
>>
>>
>>
>> On Wed, May 22, 2013 at 7:48 PM, Dmitry Soshnikov <
>> dmitry.soshni...@gmail.com> wrote:
>>
>>> Hello,
>>>
>>> It's very likely it was (should have been I believe) discussed before,
>>> and even probably was approved, but I don't see it in the latest draft yet.
>>>
>>
>> The following has been discussed, but...
>>
>>
>>>
>>> Just to make sure, the signature of the "assign" and "mixin" method
>>> should be:
>>>
>>> Object.assign(target, source,[source2, ..., sourceN]);
>>> Object.mixin(target, source,[source2, ..., sourceN]);
>>>
>>> Current draft shows me only one source for both the methods.
>>>
>>
>> That's correct. The third argument is being reserved for a descriptor map
>> (potentially). Object.assign is not specified to match the _exact_
>> behaviour of any existing object "merge", "extend", "mixin" operation.
>>
>>
> OK, good to know. Can you show a practical example with this (potential)
> descriptor map argument? Just wanna make sure it's really more useful than
> accepting multiple sources.
>
>
>> This is not unreasonable:
>>
>> function merge(target, ...sources) {
>> return sources.reduce(Object.assign, target);
>> }
>>
>
> Sure. The question is not that we can write own abstraction on top of
> existing behavior, the question is having it out of the box. Unless the
> descriptor map you mention really worth it.
>
> Dmitry
>
> _______________________________________________
> es-discuss mailing list
> es-discuss@mozilla.org
> https://mail.mozilla.org/listinfo/es-discuss
>
>
_______________________________________________
es-discuss mailing list
es-discuss@mozilla.org
https://mail.mozilla.org/listinfo/es-discuss
