From: Michael Dore <michael.dorestoafrica@...>
Date: 2008-04-21T14:49:20+09:00
Subject: Extract lines with regular expressions

I am a newb trying to take a list of data in a text file and print out a
new list of lines that contain certain characters...
I am not too worried about the actual regex - I can figure that out -
but I cannot seem to get it to implement correctly.

I found the following online (http://www.fepus.net/ruby1line.txt)

# print only lines that match a regular expression (emulates 'grep')
    $  ruby -pe 'next unless $_ =~ /regexp/' < file.txt

and it does exactly what I want, but...

how do I use this (or something similar, ie grep) in a .rb script?

I have tried this:
vl_stops.each do |vl_stops|
   puts "#{vl_stops}"
   search = Regexp.new("^\b(#{vl_stops}:)\w*")
   files.each do |file|
   f = File.open(directory+file)
      f.grep(search)
         puts #what goes here? line?
      end
      f.close
   end
puts
end
based on something I found here
(http://www.rousette.org.uk/blog/archives/2004/10/21/gtd-using-text-files/)

But I am not sure how to seal the deal, as it were...
Any thoughts would be appreciated.
Thanks!
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