Wouldn't simply making array spreading ignore nullish values be backward compatible? Unless one imagines that people are depending on this being an error somehow.
On Sat, Feb 15, 2020 at 10:05 AM Jordan Harband <ljh...@gmail.com> wrote: > Since object spread already ignores nullish values, a syntax change would > only be needed for array spread. Then, the two kinds of spread would > support different syntactic features, which seems inconsistent. > > On Sat, Feb 15, 2020 at 7:56 AM Beknar Askarov <beknaraska...@gmail.com> > wrote: > >> Thank you, everyone, for feedback. Sorry for not getting back for a >> while. I had some time to think and concluded that nullish noop in >> spreading is a good feature to be added to the language without >> complicating it too much. >> So please take a look at the explainer >> <https://gist.github.com/askbeka/8bb17508ec250a789ea9bff683a50e38> and >> lets discuss in es-discourse proposal >> <https://es.discourse.group/t/optional-spreading-proposal/224>, if you >> have further feedback, please share >> >> On Fri, Aug 23, 2019 at 7:18 PM Herby Vojčík <he...@mailbox.sk> wrote: >> >>> On 23. 8. 2019 16:24, Beknar Askarov wrote: >>> > @Scott Rudiger After thinking more about it. >>> > I would not like to conflict with semantics of optional chaining and >>> > null coalescing operator. >>> > So in order to not confuse people, maybe introduce two types of >>> optional >>> > spread operators >>> > >>> > >>> > 1. `?...` - Do not spread if nullish. Note nullish. Else try to spread. >>> > Signature Array: [?...(nullish | Iterable)]; >>> > Signature Object: {?...(nullish | object)}; >>> > >>> > 2. `!...` - Do not spread if false. Note FALSE not falsy. Else try to >>> > spread. >>> >>> I read >>> >>> !...foo >>> >>> as >>> >>> !(...foo) >>> >>> that is, logical not. I'd tip it already works that way. In which case >>> no go, break compat. >>> >>> Herby >>> >>> > Signature Array: [!...(false | Iterable)]; >>> > Signature Object: {!...(false | object)}; >>> > >>> > I think this can be an option to avoid consfusion >>> >>> Or add a new one. :-( >>> >> _______________________________________________ > 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
