From: Lee Jarvis <ljjarvis@...>
Date: 2007-12-06T22:17:22+09:00
Subject: Re: if /hello/ =~line

Jano Svitok wrote:
> (This might apply for 1.8 MRI only, other interpreters might be
> different): When the regex literal contains #{}, the object
> is created on each pass through the code. In the other case it's
> created only once.


True, you could use the Regexp class also then..

var = 'hello'
revar = Regexp.new(var)

if revar =~ line
  #..
end

or perhaps

var = 'hello'
File.foreach 'file.txt' do |line|
  if Regexp.new(var) =~ line
    puts 'found it'
    break
  end
end

If you don't care how many times its created and you don't want to use 
the '#' in your regexp matches because your IDE doesn't know any better.

Regards,
Lee
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