not always, only when thisArg is needed ... Array#reduce(cb, initialValue[, thisArg])
if needed, arr.reduce(cb, undefined, obj) does not look that bad, IMHO again, I m fine with current status ... On Mon, Jan 7, 2013 at 3:14 PM, Rick Waldron <waldron.r...@gmail.com> wrote: > > > On Monday, January 7, 2013, Andrea Giammarchi wrote: > >> 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 >> > > Sorry, but no—this would force user code to always provide an initialVal, > even when it would prefer to use the first item the array—which is the > default when initialVal is omitted. > > Rick > > > >> >> On Mon, Jan 7, 2013 at 2:59 PM, Rick Waldron <waldron.r...@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.r...@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.giammar...@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 <e...@qfox.nl>wrote: >>>>>> >>>>>>> Mostly out of curiosity; why do Array#reduce and reduceRight have no >>>>>>> context parameter? >>>>>>> >>>>>>> - peter >>>>>>> _______________________________________________ >>>>>>> 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 >>>>>> >>>>>> >>>>> >>>> >>
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