From: Robert Klemme <shortcutter@...>
Date: 2008-03-25T19:27:24+09:00
Subject: Re: Replacing part of a matched regular expression using gsub

2008/3/25, Ben <coppin@gmail.com>:
> Hi Jesus,
>
>
>  > Hi, it works for me:
>  >
>  > irb(main):009:0> replacement = "\\1102\\3,"
>  > => "\\1102\\3,"
>  > irb(main):010:0> word = "qweraxbtyuiop"
>  > => "qweraxbtyuiop"
>  > irb(main):011:0> word.gsub!(Regexp.new("(a)(x)(b)"), replacement)
>  > => "qwera102b,tyuiop"
>  >
>  > Hope this helps,
>  >
>  > Jesus.
>
>
> Thank you! Actually, that did help, as it made me realise that what I
>  needed to do was try it out in irb. I got it to work now - thanks!
>  (For the record, the problem was that rule.getRegExp was returning
>  "(a)x(b)" instead of "(a)(x)(b)").

I'd prefer the first one because you do not need the second group as
far as I can see.  So I'd do

str.gsub!( /(a)x(b)/, '\\1102,\\2' )

Kind regards

robert

-- 
use.inject do |as, often| as.you_can - without end