2009/7/9 John M McIntosh <[email protected]>: > > On 9-Jul-09, at 5:58 AM, Hernan Wilkinson wrote: > >> So, Stef, what do we do? :-) >> I think we have discussed very interesting things is this thread. My >> conclusions are: > >> 4) Go back to how things were > > +1 > > Frankly I think you could reuse '==' for the *exact* compare between > two items in the Number hierarchy > and leave '=' as the yes they are *equal* but not the same.... > > then you could really rummage about and fix/explain/justify why > > 29347921734912734927349279273499274 == > (29347921734912734927349279273499274-1+1) is false and explain why > in the same manner as saying (1/10) == 0.1 is false, & resolve why 0.1 > == (0.1-0.01+0.01) is false yet 10 == (10-1+1) is true. >
The reason why I would stick to = meaning exactly and some other symbol meaning approximately, is because I expect = to be transitive, while I can very well understand that approximatelyEqual: is not. I would also avoid == because some IdentitySet and the like would start to hate Numbers... unfortunately ~= means different... =~= or using some unicode symbol... (latex \approx) > And yes people do things like use '==' for numbers, for the strangest > reasons. > Yes, most because one thought it would be faster (?), but not only... An example is the hackish pattern for enumerating objects that would not work anymore :( like http://bugs.squeak.org/view.php?id=2788 > -- > = > = > = > ======================================================================== > John M. McIntosh <[email protected]> Twitter: > squeaker68882 > Corporate Smalltalk Consulting Ltd. http://www.smalltalkconsulting.com > = > = > = > ======================================================================== > > > > > > _______________________________________________ > Pharo-project mailing list > [email protected] > http://lists.gforge.inria.fr/cgi-bin/mailman/listinfo/pharo-project > _______________________________________________ Pharo-project mailing list [email protected] http://lists.gforge.inria.fr/cgi-bin/mailman/listinfo/pharo-project
