#!/usr/bin/env ruby
# This code comes from http://ruby-it.org/pages/Cercare+una+Stringa+in+un%27altra
# Check the page for copyright notice and explanations



 >> rgx= /espressione/
 => /espressione/

 >> rgx= Regexp.new "espressione"
 => /espressione/

 >> 'la mia espressione' =~ rgx
 => 7
 >> 'bau' =~ rgx
 => nil

 >> if 'ciao'=~ /a/
 >>  p 'trovata una a'
 >> end

 >> /a/.match 'ciao'
 => #<MatchData:0x27c9b90>
 >> /a/.match 'cio'
 => nil

 >> case 'ciao'
 >>  when /k/
 >>   puts 'trovata k'
 >>  when /z/
 >>   puts 'trovata z'
 >>  when /a/
 >>   puts 'trovata a'
 >> end
 trovata a
 => nil