From: matz@... (Yukihiro Matsumoto)
Date: 2003-04-25T08:10:04+09:00
Subject: Re: Hashes and Enumerable#each_with_index

Hi,

In message "Hashes and Enumerable#each_with_index"
    on 03/04/25, Ryan Pavlik <rpav@nwlink.com> writes:

|The problem:  Hash#each_with_index returns an index that is not usable
|to address the hash.  That is, given the following:
|
|    h = Hash.new
|    h.each_with_index {
|        | o, i |
|        ...
|    }
|
|i is not defined such that h[i] == o, which is both misleading and
|seemingly useless.  (This behavior, as per the previous discussion, can
|be achieved with h.to_a.each_with_index.)
|
|Would it not be more useful to adopt the definiton of
|Enumerable#each_with_index where the index given is such that e[i] == o
|for any given Enumerable?

No.  Index in each_with_index means offset of the values.  It might be
possible to implement a method that you described for arrays, hashes,
string, etc.  But it should have different name.

							matz.