From: "David A. Black" <dblack@...>
Date: 2004-09-20T23:52:08+09:00
Subject: Re: Array#index block and rdetect

Hi --

On Mon, 20 Sep 2004, Randy W. Sims wrote:

> David A. Black wrote:
> > Hi --
> > 
> > On Mon, 20 Sep 2004, Yukihiro Matsumoto wrote:
> > 
> >>  * How about other enumerable classes?
> > 
> > 
> > I think the idea of every enumerable class having an "index", defined
> > as part of that class, is possibly useful.  For hashes it could be the
> > keys; for arrays, the integer index; for files, the line number.  In
> > some cases (like index/key for hashes), it might be redundant.  But it
> > might open up some good possibilities.  
> > 
> > That would mean an enumerable class would have to be able to say:
> > "This is how I define 'index'."  I'm not sure how that would work.  
> 
> All enumerable objects don't neccessarilly have a meaningful concept of 
> an index. 

I know.  That's why I've been advocating the removal of
Hash#each_with_index for four years :-)


David

-- 
David A. Black
dblack@wobblini.net