Additional methods for Objects (like Arrays)

[Isiah Meadows]

I think that these methods should exist in iterator prototypes, with the
native iterators subclassing something like Iterator. Object.entries and
Object.values should return iterators that inherit these methods. Such
wrapper libraries are already coming out, and making existing arrays lazily
iterate already exists in `Symbol.iterator`.

On Tue, Feb 2, 2016, 12:12 Simon Blackwell <syblackwell at anywhichway.com>
wrote:

> Although Rick makes a good point that Object.values and Object.entries
> make creating functionality similar to that describe by Kaustubh, they are
> no exactly direct. We have added the requested functions to V2.0 of
> JavaScript Object Extensions at https://github.com/anywhichway/joex.
>
>
> On Fri, Jan 29, 2016 at 7:44 PM, Rick Waldron <waldron.rick at gmail.com>
> wrote:
>
>>
>>
>> On Fri, Jan 29, 2016 at 6:08 PM Kaustubh Karkare <
>> kaustubh.karkare at gmail.com> wrote:
>>
>>> I have recently come to feel the need for Object.map, which is like
>>> Array.map,
>>> except that it receive keys instead of indices.
>>>
>>> Object.prototype.map = function(mapFn, context) {
>>>   return Object.keys(this)
>>>     .reduce(function(result, key) {
>>>       result[key] = mapFn.call(context, this[key], key, this);
>>>       return result;
>>>     }, {});
>>> };
>>>
>>> Without this, I frequently do the exact same thing as the above manually,
>>> which leads to unnecessary code duplication.
>>>
>>> Given that, it might make sense to match other methods from
>>> Array.prototype
>>>
>>> Object.map
>>> Object.filter
>>> Object.every
>>> Object.some
>>> Object.reduce
>>> Object.find
>>> Object.findKey // like Array.findIndex
>>>
>>
>>
>> Are these necessary given the introduction of Object.values() and
>> Object.entries()? https://github.com/tc39/proposal-object-values-entries
>>
>> Rick
>>
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>>
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