Yeah, because it's not a pattern patching, and access to array elements may have side effects, it's seems hard to specify/implement. Otherwise, destructuring might analyze the pattern, see the last element is required, extract it, and then do iteration for others.
Dmitry On Saturday, October 1, 2016, Michael Theriot <michael.lee.ther...@gmail.com> wrote: > I think this is because there's no universal way of determining when an > iterator ends. The only way this could work for all iterators would require > popping values off of `a` after they've been added. > > On Sat, Oct 1, 2016 at 6:17 AM, Cyril Auburtin <cyril.aubur...@gmail.com > <javascript:_e(%7B%7D,'cvml','cyril.aubur...@gmail.com');>> wrote: > >> It was possibly already discussed, but why isn't: >> ``` >> var [...a, last] = [1,2,3]; >> ``` >> supported? >> >> I don't see the problem, as long as there's one ... only >> >> _______________________________________________ >> es-discuss mailing list >> es-discuss@mozilla.org >> <javascript:_e(%7B%7D,'cvml','es-discuss@mozilla.org');> >> https://mail.mozilla.org/listinfo/es-discuss >> >> >
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