2009/12/8 Brendan Eich <[email protected]>: > On Dec 8, 2009, at 11:51 AM, Erik Corry wrote: > >>> for (let i in arraylike) { >>> i |= 0; >> >> If this pattern catches on then we could optimize for it without >> changing the language. > > Yeah, but some day there will be only "new" versions in which i is numeric > for arraylikes and that becomes pointless. On that fine day programmers can > stop writing the ugly extra statement. That's worth something too, even as a > new loop construct "could be nicer". > > Do we want nicer with high migration tax and greater total language > complexity (new loop construct), or nicer with lower tax (reformed for-in > under new opt-in version), or not-so-nice with perpetual type-fixup kludge
Well, we have "use strict," and then this would give us "use integer," so all that leaves would be an excuse to shoehorn "use vmsish" into the language :) > (what you seem resigned to :-P). > > >> I think returning integers from for-in is a >> complete non-starter but I'm not volunteering to build a browser that >> does it just so I can check what breaks. > > I'll handle that chore... > > /be > > _______________________________________________ > es-discuss mailing list > [email protected] > https://mail.mozilla.org/listinfo/es-discuss > _______________________________________________ es-discuss mailing list [email protected] https://mail.mozilla.org/listinfo/es-discuss
