On 8-Aug-08, at 5:20 PM, Igor Stasenko wrote:

> 2008/8/9 Craig Latta <craig at netjam.org>:
>>
>>    I'll ask the inevitable question... given that ability, what do  
>> you
>> really want to do? :)
>>
>
> Some practicle usage: pick an arbitrary array and tell the number of
> _unique_ objects it contains, including nils, of course.


For Sets that is trivial without any need whatsoever to alter  
anything. It is theSet size + 1 since all Sets will have at least one  
nil. Unless of course some evil person messes up the growing protocol  
for Sets.

tim
--
tim Rowledge; tim at rowledge.org; http://www.rowledge.org/tim
Variables won't; constants aren't.