Hm, despite the fewer number of points in the cons category I'm persuaded by the argument that we don't want people getting arrays and objects confused. Might be best to limit that until there is a compelling use case which there might not be.
Ben Le mar. 10 juill. 2018 09 h 16, Ben Wiley <[email protected]> a écrit : > > > Le mar. 10 juill. 2018 09 h 14, T.J. Crowder < > [email protected]> a écrit : > >> On Tue, Jul 10, 2018 at 1:22 PM, Ben Wiley <[email protected]> >> wrote: >> > Here's a spec question: must the keys specified be numbers? The >> application >> > is questionable but I say anything could be allowed. E.g. >> > ... >> > So array rest spread would provide totally parallel functionality to >> object >> > rest spread with the key difference that result objects are arrays >> instead >> > of objects. >> >> I'd call it a minor point. But off-the-cuff: >> >> There's always a hopefully-creative tension between A) not >> unnecessarily limiting things, and B) YAGNI and/or not handing people >> footguns. >> >> In the "don't unnecessarily limit" column: >> >> * The ship has already sailed in terms of people confusing arrays and >> objects in JavaScript. >> * Not limiting to array index property names should mean the same >> parsing structures and code can be used. >> * I don't like unnecessary runtime checks, and the check that the >> property name is an array index would have to be at runtime, not >> parse-time, because of computed property names. >> * Standard array indexes are officially strings anyway (though we >> write them as numbers and they get optimized that way most of the >> time). >> * `[length: 10]` has a certain seductive quality about it. >> >> In the YAGNI and/or footgun column: >> >> * People already get objects and arrays confused enough! At least >> right now, if they write `[foo: "bar"]`, they get a syntax error >> (though of course `{0: "bar"}` is perfectly valid). Don't hand them >> yet another footgun. >> * As you say, application is questionable. >> >> -- T.J. Crowder >> >
_______________________________________________ es-discuss mailing list [email protected] https://mail.mozilla.org/listinfo/es-discuss
