> 
> No.  Of course, String and Array share many method as sequences.  But
> they are not identical.  String is a two face class.  A sequence of
> characters, and a sequence of lines. Some like [] etc. works on
> characters.  OTOH, each, sort, etc. works on lines.
> 
> Then, what do you think each_index should work on?
> Characters?  Lines?
> 
> Either case, somebody suppose the other one, and get confused.
> I think each_index for String is merely a source of confusion.
> This is the reason why there's no each_index in String.
> 
> Did I explain properly?

Yes, thanks. I was not aware that Strings beeing "two-dimensional". I
was just playing around with some things which should work either on
Arrays or Strings (or any Sequence) because of this I tried use
features which can be used in all Sequence classes.

Regards
Friedrich

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