From: Eric Mahurin <eric_mahurin@...>
Date: 2005-05-22T22:59:20+09:00
Subject: Re: join not in Enumerable

--- "David A. Black" <dblack@wobblini.net> wrote:
> I have to say, though, that I think #each_with_index should
> be removed
> from Enumerable and pushed down to the classes that mix it in
> (similarly to #each_index).  But I suppose as long as they
> are called
> "enumerable" they are in some sense associated with a
> numerical index.

Unfortunately for Hash, this can cause confusion to what an
"index" is.  If it weren't for an already existing Hash#index
(which gets a key), I would suggest it be brought over from
Array to Enumerable.

I do tend to think that many of the Array methods should be
brought over to Enumerable.  You could bring over just about
any one that is non-modifying and operates sequentially forward
on the array, but you may also restrict the ones related to an
"index":

*, +, <=>, ==, assoc, compact, concat, empty?, eql?, first,
flatten, hash, join, last, length, nitems, pack, rassoc, size,
to_s, uniq

And if you don't care about the "index" confusion in hash, you
could get these:

[], at, fetch, index, slice, values_at




		
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