From: "John W. Long" <ng@...>
Date: 2006-05-25T01:06:01+09:00
Subject: Re: RegExp Problem

A LeDonne wrote:
> It looks to me like backreferences are not available inside character
> classes, because the backslash sequence is interpreted as a character.
> So in a character class, \1 is the same as \001, commonly known as
> control-A.
> 
> irb(main):018:0> re = /(a)([\1]) test/
> => /(a)([\1]) test/
> irb(main):019:0> md = re.match "aa test"
> => nil
> irb(main):020:0> md = re.match "a test"
> => nil
> irb(main):021:0> md = re.match "a1 test"
> => nil
> irb(main):022:0> md = re.match "a\1 test"
> => #<MatchData:0x28460e8>
> irb(main):023:0> md[0]
> => "a\001 test"
> irb(main):024:0> md[1]
> => "a"
> irb(main):025:0> md[2]
> => "\001"

That makes perfect sense. So how do I get it to do what I want?

--
John Long
http://wiseheartdesign.com
http://radiantcms.org