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

Naveen Chawla naveen.chwl at gmail.com
Wed Aug 9 07:40:00 UTC 2017


`iterable`, excuse me

On Wed, 9 Aug 2017 at 13:05 Naveen Chawla <naveen.chwl at gmail.com> wrote:

> 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
>>>>>>
>>>>>
>>>
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