Array.prototype.toObjectByProperty( element=>element.property )

Naveen Chawla naveen.chwl at gmail.com
Wed Aug 9 07:35:18 UTC 2017


It would be in the `iteratable` `protocol` (interface)

On Wed, 9 Aug 2017 at 13:03 Naveen Chawla <naveen.chwl at gmail.com> wrote:

> You're thinking of `iterator`
>
> On Wed, 9 Aug 2017 at 13:01 Jordan Harband <ljharb at gmail.com> wrote:
>
>> An iterator is just an object with a `next` method. There's no consistent
>> place to put any prototype methods on all iterables, so that's a nonstarter
>> imo.
>>
>> On Wed, Aug 9, 2017 at 12:26 AM, Naveen Chawla <naveen.chwl at gmail.com>
>> wrote:
>>
>>> I do not use entries so I would not use `Object.fromEntries`. For arrays
>>> I could just use reduce, instead of transforming to [key, value] entries,
>>> before factoring it into an `arrayToObject` function in my code (which I
>>> already do) when I want to do it from more than one place in my code - if
>>> there existed no more direct way of transforming from iterable to object.
>>> All entries arrays are iterable, but not all iterables are entries arrays,
>>> which means that iterable is the more generic concept than entries, meaning
>>> that iterable, not entries, is the more suitable starting point for this
>>> functionality.
>>>
>>> `Object.fromIterable(iterable, keyFromElement[, valueFromElement])` is
>>> more verbose than `iterable.toObject(keyFromElement[, valueFromElement])
>>> and doesn't allow chaining after iterable transformation methods (like
>>> `filter` etc.)
>>>
>>> On Tue, 8 Aug 2017 at 16:23 Naveen Chawla <naveen.chwl at gmail.com> wrote:
>>>
>>>> OK thanks for the link - can you explain where the complexity is in my
>>>> proposal?
>>>>
>>>> On Tue, 8 Aug 2017 at 16:14 T.J. Crowder <
>>>> tj.crowder at farsightsoftware.com> wrote:
>>>>
>>>>> On Tue, Aug 8, 2017 at 11:39 AM, Naveen Chawla <naveen.chwl at gmail.com>
>>>>> wrote:
>>>>> > Furthermore, if you use entries, this allows `[key, value]` entries
>>>>> > with object keys to be transformed into objects (which is not
>>>>> > allowed by `Object.fromEntries`):
>>>>>
>>>>> With respect, please do have a *thorough* read of my first reply in
>>>>> this thread, the ensuing discussion with Darien, and Darien's proposal, in
>>>>> particular [this bit of it](
>>>>> https://github.com/bathos/object-from-entries#additional-arguments).
>>>>> Those various sources explain my comment about complexity and how
>>>>> `Object.fromEntries` might do what you want.
>>>>>
>>>>> -- T.J. Crowder
>>>>>
>>>>
>>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mail.mozilla.org/pipermail/es-discuss/attachments/20170809/1ba7b7fd/attachment.html>


More information about the es-discuss mailing list