From: nobu.nokada@...
Date: 2002-12-13T06:59:36+09:00
Subject: Re: [RCR] Global Regexp Match Mechanism (//g)

Hi,

At Fri, 13 Dec 2002 04:31:12 +0900,
Austin Ziegler wrote:
> #scan doesn't solve the ultimate problem -- being able to
> backtrack and rescan from an earlier position (a la Perl's
> pos() function). Scan would work "OK" if it returned an array
> of MatchData instead of Strings. BTW, my posted code almost
> works. I meant to say that I wanted to do that without doing
> "foostr = md.post_match".

String#index takes optional argument specifies searching
position.

  pos = 0
  while foostr.index(/foo/, pos)
    puts $&
    pos = $~.end(0)
  end

Optional argument to Regexp#match somebody had proposed would
be nice too.

  pos = 0
  while md = /foo/.match(foostr, pos)
    puts md.to_s
    pos = md.end(0)
  end

-- 
Nobu Nakada