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 (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
