From: 7stud -- <bbxx789_05ss@...>
Date: 2011-04-06T10:37:16+09:00
Subject: Re: Match a pattern multiple times, returning matches, captures and offset?

Markus Fischer wrote in post #991092:
>
> But here I'm missing the further possible matches, "_bar_" and "bar". Or
> the #scan approach:
>
> ruby-1.9.2-p180 :004 > m = "_foo_ _bar_".scan(/_(\w+)_/)
>  => [["foo"], ["bar"]]
>
> But in this case I've even less information, the match including _foo_
> or _bar_ is not present and I can't get the offsets too.
>
> I re-read the documentation for Regexp#match

If you look at the preamble in the docs for the MatchData class, you can 
retrieve a MatchData object using Regexp.last_match, which you can call 
inside a scan() block:

str = "_foo_ _bar_"

str.scan(/_(\w+)_/) do |match|
  md = Regexp.last_match
  p [md[0], md[1], md.offset(1)]

end

--output:--
["_foo_", "foo", [1, 4]]
["_bar_", "bar", [7, 10]]

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