From: Sebastian Hungerecker <sepp2k@...>
Date: 2008-07-19T20:01:31+09:00
Subject: Re: Suggestions for a parsing strategy?

David Masover wrote:
> Why isn't [the return value of scan] an Enumerator in Ruby 1.9?

Or 1.8.7 for that matter. Yes, I've been asking myself this very same question 
since the release of 1.9.


> And I suspect that it would most often be useful for things like #map, if
> not used in block form outright. Making it an Enumerator would be somewhat
> more efficient than building a whole array first -- and more responsive, if
> it's a large string.

Also it'd allow you to use the matchdata object inside map if you need to. The 
way it is now you'd have to do:
string.enum_for(:scan,/re/).map do
  md = Regexp.last_match
  do_something_with md
end

instead of just
string.scan.map do...end


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