From: James Edward Gray II <james@...>
Date: 2006-02-07T23:30:54+09:00
Subject: Re: Grep via Ruby

On Feb 7, 2006, at 7:08 AM, ralf wrote:

> I'd like to have a "grep" with case-insensitive match.

You can turn options on/off inside a pattern.  For example, here is a  
pattern that matches the word file, regardless of case:

   (?i:file)

> Maybe this can be done a lot easier by using ARGF??

Yes it can.  Your input loop can be replaced with:

   ARGF.grep(pattern) do |line|
     puts "#{ARGF.filename} #{ARGF.lineno}: #{line}"
   end

Hope that helps.

James Edward Gray II