It is. https://tc39.github.io/ecma262/#prod-FunctionRestParameter
https://tc39.github.io/ecma262/#prod-BindingRestElement > On May 29, 2016, at 1:36 PM, Renki Ivanko <[email protected]> wrote: > > It works in V8 at least, so I assumed it's correct. > >> On Sun, May 29, 2016 at 8:29 PM, Bob Myers <[email protected]> wrote: >> I'm quite sure this syntax is invalid. >> >> >>> On Sun, May 29, 2016 at 9:36 PM, Renki Ivanko <[email protected]> >>> wrote: >>> You can already do it like this: >>> >>> ```js >>> ((...[,,foo]) => foo)(1, 2, 3) // -> 3 >>> ``` >>> >>> >>> R. <http://untu.ms/> >>> >>>> On Sun, May 29, 2016 at 6:53 PM, Cyril Auburtin <[email protected]> >>>> wrote: >>>> Similarly to: >>>> >>>> `var [,x,,y] = [1,2,3,4,5,6];` >>>> >>>> I think it could be interesting to let a field empty in function arguments >>>> >>>> `[1,2,3,4].map( (,i) => i )`, `Array.from({length:10}, (,i) => i )` >>>> >>>> `function test(a,,b) { }` >>>> >>>> (but that would alter the current parsing, that doesn't allow it) >>>> >>>> Currently I often use `_` as a way to mark ignored fields, but when there >>>> are more than 1 you need another identifier. A standard way would be >>>> interesting rather > > _______________________________________________ > es-discuss mailing list > [email protected] > https://mail.mozilla.org/listinfo/es-discuss
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