On Aug 24, 2008, at 10:02 PM, Mark S. Miller wrote: > Let's say you did that -- make a special case for NaN but not for -0. > Let's say you use this Map to build memoize. Now let's say someone > writes a purely functional function F such that F(0) is 3 and F(-0) is > 7. Let's say G is memoize(F). Would you find it acceptable for G(0) to > sometimes yield 3 and sometimes 7?
I'd file a bug, or find a better memoizer :-). "Quality of implementation" eager beavers can use Math.atan2 to tell -0 from 0, just as they can use isNaN or x !== x. Yes, this is gross. I'm in favor of Object.identical and Object.hashcode, maybe even in ES3.1 (I should get my act together and help spec 'em). Just not particularly on account of Decimal, even with equated cohort members. I still agree with Sam. And as always,"hard cases make bad law". /be _______________________________________________ Es-discuss mailing list Es-discuss@mozilla.org https://mail.mozilla.org/listinfo/es-discuss
