From: Brian Candler <b.candler@...>
Date: 2010-01-31T02:56:18+09:00
Subject: Re: How do I use a variable in a regexp search string?

Josh Cheek wrote:
> File.open(filename).each do |line|
>   if line =~ to_find
>     puts "This line matches: #{line}"
>     puts "This is what matches: #{line[to_find]}"

or to avoid having to match it twice:

  puts "This is what matches: #{$&}"

Also:
  puts "This is what came before: #{$`}"
  puts "This is what came after: #{$'}"
  puts "Capture 1 is #{$1}"
  # etc
-- 
Posted via http://www.ruby-forum.com/.