From: Mauricio Fernandez <mfp@...>
Date: 2006-06-21T00:07:22+09:00
Subject: Re: uniq() Oddity

On Tue, Jun 20, 2006 at 11:56:21PM +0900, James Edward Gray II wrote:
> >>So which one is uniq() really using?  eql?()?
> >
> >both, uniq creates a hash from the array.
> 
> OK, let me expand my question slightly:  why are hash() and eql?()  
> not meaningfully defined for Hash?
> 
> Doesn't Array.hash just aggregate the hash() of its elements?  Why  
> could Hash not do the same?

There's also Hash#default and Hash#default_proc to take in mind.
And you can't rely on Proc#hash and friends...
Otherwise, it's trivially implementable.

-- 
Mauricio Fernandez  -   http://eigenclass.org   -  singular Ruby