#!/bin/env ruby
## Requires an ANSI terminal!
#
st = "\033[7m"
en = "\033[m"

puts "Enter an empty string at any time to exit."

while true
   print "str> "; STDOUT.flush; str = gets.chop
   break if str.empty?
      print "pat> "; STDOUT.flush; pat = gets.chop
   break if pat.empty?
      re = Regexp.new(pat)
      puts str.gsub(re,"#{st}\\&#{en}")
end