From: Sean Chittenden <sean@...>
Date: 2002-04-28T08:45:32+09:00
Subject: Re: Numberic#prev

> |*) String#prev is controversial with minimal gain (though a fun
> | exercise in Ruby skilz)
> 
> Agreed,
> 
> |*) Integer#prev is well defined and an easy target
> 
> Yes.
> 
> |*) No one seems to think Integer#prev is a bad idea
> 
> It's not bad, but useless.  "succ" is useful with polymorphism as used
> in Range, but no other non-numeric class defines "prev", there's no
> benefit.  what's wrong with "n-1"?

Heh, that's a better question than I thought...  after benchmarking
that against HEAD: almost nothing.  I looks like it's marginally
harder on the GC to use i - 1, but nothing to write home about (few MB
with 1M objects).  Thanks for the reality check.  :~)  -sc

-- 
Sean Chittenden