On Wednesday, December 11, 2002, at 11:16 AM, Luke Palmer wrote:
After thinking about it a little more, I'll set myself on the "yes" side. And propose either '===' or ':=:' to do it.This brings up something that's been on the tip of my toungue for awhile. In many object-oriented languages we have seen that there is an important difference between "equal" and "same." Perl already has two kinds of equal, but IIRC there is nothing to test whether two variables refer to the same place in memory. Should there be?
The reason being that you could in fact want to say any of [1], [2], and [3] as separate, useful concepts. So merely overloading '==' or 'eq' would not be sufficient, as it would hide the previous, still useful meanings.$obj1 eq $obj2; # [1] are their stringifications identical? $obj1 == $obj2; # [2] are their numifications identical? $obj1 === $obj2; # [3] are they in fact the same object?
MikeL
