Unsure if this is even still being actively weekend out, but I've played around with the binding operator in Babel for this purpose. It definitely has its use case; mine was filtering allowed keys for a REST API.
On Wed, Jul 25, 2018, 19:54 Mikkel Davis <mikk...@gmail.com> wrote: > Thanks for the heads up! As I mentioned above, I've seen it come up > before, but all the top results when searching are syntactic proposals. > Syntax would be cool and all, but like you said it may or may not be > justified. In the mean time, I don't see any traction for an Object util > proposal like this. Does anybody know if this specifically has come up > before and if there is a big reason against it? > --- > Mikkel R. Davis > > > On Wed, Jul 25, 2018 at 5:42 PM Isiah Meadows <isiahmead...@gmail.com> > wrote: > >> Just as a heads up, this has come up plenty of times before, both as a >> function and (usually) syntax: >> https://www.google.com/search?q=site%3Aesdiscuss.org+pick >> >> I'm good with it being a built-in function, but it's harder to justify >> using syntax apart from an easier time building up the relevant type >> ICs. >> ----- >> >> Isiah Meadows >> m...@isiahmeadows.com >> www.isiahmeadows.com >> >> >> On Wed, Jul 25, 2018 at 5:45 PM, Mikkel Davis <mikk...@gmail.com> wrote: >> > I've seen proposals for syntax additions that give functionality >> similar to >> > lodash's "pick" utility. But I think it may be more appropriate to add >> it as >> > an Object utility in the same vein of `Object.assign`, `Object.keys`, >> > `Object.values`. After a quick search, I was surprised to not find an >> > existing proposal like this. Why would that be? >> > >> > For me, this isn't just one of those "huh, that's a neat lodash util >> that >> > would be nifty to have natively." The codebase I work on most often >> already >> > has lodash everywhere, and I have found myself utilizing _.pick >> frequently, >> > e.g. mapping or passing down portions of React state or props. I really >> > think is common enough that it justifies addition to the spec. >> > >> > ```js >> > const person = { >> > first: 'Marie', >> > last: 'Curie', >> > age: 51, >> > address: 'Grenoble, France', >> > }; >> > >> > Object.pick(person, ['first', 'age']); // {first: "Marie", age: 51} >> > ``` >> > >> > The only other concise way to do this I can think of, using latest ES is >> > `(({first, age}) => ({first, age}))(person)`, which is quite >> undesirable, >> > for a variety of reasons. >> > >> > Another name that might be nice is `Object.slice`. >> > >> > --- >> > Mikkel R. Davis >> > >> > _______________________________________________ >> > 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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