From: Dan King <dan.king106@...>
Date: 2010-04-12T08:40:38+09:00
Subject: Using popen & grep

I'm relatively new to ruby and to practice I've put together the code
below - it's supposed take two arguments then apply it to a grep command
and display the output. Currently, nothing is outputted to the console.
Anyone see what I'm doing wrong, thanks.

  1 #!/usr/bin/ruby
  2
  3 results = IO.popen("grep -i #{ARGV[0]} #{ARGV[1]}", "r")
  4 while output = results.gets
  5     puts output
  6 end
  7 results.close
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