vassili at objectpeople.com
Fri Jun 19 11:29:16 UTC 1998
Eliot & Linda writes:
> Boris G. Chr. Shingarov wrote:
> > sqrmax at cvtci.com.ar wrote:
> > > I've found faster implementations for four methods of Behaviour. Maybe
> > > they're worth an update item. Two of the speedups are fourfold!
> > The IBM implementation is almost as fast but is more elegant:
> > Behavior>>allInstances
> > | aSet |
> > aSet := Set new.
> > self allSubclassesDo: [ :sub | aSet add: sub ].
> > ^aSet
> But this implementation is totally incorrect. It returns a Set of
> objects that are not #= to each other, not an IdentitySet of objects
> that are not #== to each other. So if you use this to return all
> instances it will frequently return a subset of all instances.
Boris probably meant #allSubclasses rather than #allInstances, at
least the body of the method produces just that.
Vassili Bykov vassili at objectpeople.com
The Object People http://www.objectpeople.com
"Any sufficiently complicated C or Fortran program contains an ad hoc
informally-specified bug-ridden slow implementation of half of Common Lisp."
-- Greenspun's Tenth Rule of Programming
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