Reduce context parameter

Andrea Giammarchi andrea.giammarchi at gmail.com
Mon Jan 7 15:08:29 PST 2013


thisArg could have been third optional argument leaving current
implementation as it is but making thisArg possible, IMHO

lucky me I don't use Array#reduce that much neither I need the thisArg so
far so ... OK for me


On Mon, Jan 7, 2013 at 2:59 PM, Rick Waldron <waldron.rick at gmail.com> wrote:

>
>
> On Monday, January 7, 2013, Andrea Giammarchi wrote:
>
>> Rick you know bind is that slow and it costs on GC if used massively ;-)
>>
>
> This is not my problem, implementors should optimize. bind() would only
> occur once per method call.
>
>
>>
>> I use a lot the second argument in Array#extras and I feel Peter van der
>> Zee here: reduce/Right should have had that too
>>
>
> The initialVal argument is _optional_ and undefined is valid — how would
> you decide if what was passed should be initial value or thisArg?
>
> Rick
>
>
>
>
>
>>
>> br
>>
>
>
>
>>
>>
>> On Mon, Jan 7, 2013 at 1:10 PM, Rick Waldron <waldron.rick at gmail.com>wrote:
>>
>>> I know this doesn't answer your question, but Function.prototype.bind
>>> makes thisArg obsolete.
>>>
>>> Regarding the origin story, there is some discussion here:
>>> https://mail.mozilla.org/pipermail/es-discuss/2008-June/006431.html
>>>
>>> Rick
>>>
>>>
>>> On Mon, Jan 7, 2013 at 3:56 PM, Andrea Giammarchi <
>>> andrea.giammarchi at gmail.com> wrote:
>>>
>>>> I think to increase confusion with other Array#extras :D
>>>>
>>>> and since we have this specced as it is now, a third parameter for the
>>>> context could add even more confusion later on <3
>>>>
>>>> I know, I should not have answered that ...
>>>>
>>>>
>>>> On Sun, Jan 6, 2013 at 9:48 AM, Peter van der Zee <ecma at qfox.nl> wrote:
>>>>
>>>>> Mostly out of curiosity; why do Array#reduce and reduceRight have no
>>>>> context parameter?
>>>>>
>>>>> - peter
>>>>> _______________________________________________
>>>>> es-discuss mailing list
>>>>> es-discuss at mozilla.org
>>>>> https://mail.mozilla.org/listinfo/es-discuss
>>>>>
>>>>
>>>>
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>>>
>>
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