From: Joel VanderWerf <vjoel@...>
Date: 2008-07-08T04:50:09+09:00
Subject: Re: implementing a simple and efficient index system

Robert Dober wrote:
> On Mon, Jul 7, 2008 at 5:55 PM, Dave Bass <davebass@musician.org> wrote:
>> Robert Dober wrote:
>>>> Thanks, that's exactly what I was looking for! I didn't know set
>>>> basically works like a hash without a key...
>>> make that "without a value".
>> For sets in Perl I've used hashes with an arbitrary value of 1, or
>> undef. In Ruby I guess that would be values of true or nil. Any better
>> suggestions, apart from using Set of course?
> 
> true might be a better choice than nil ;)
> 
> {}[42] --> nil
> 
> R.

Tsk. Don't you know that "true or nil" evaluates to "true"?  :-P

(Srsly, I think he meant true for membership and nil otherwise.)

-- 
       vjoel : Joel VanderWerf : path berkeley edu : 510 665 3407