#!/usr/bin/env ruby
# This code comes from http://ruby-it.org/pages/Espressioni+Regolari+Basi
# Check the page for copyright notice and explanations



 >> rgx= /esp/
 => /esp/ 
 >> rgx= Regexp.new("esp")
 => /esp/

 /stringa/

 >> rgx= /via$/
 => /via$/
 >> 'ferrovia' =~ rgx
 => 5
 >> 'viadotto' =~ rgx
 => nil

 >> rgx= /^via/
 => /^via/
 >> 'ferrovia' =~ rgx
 => nil
 >> 'viadotto' =~ rgx
 => 0

 >> rgx= /^via$/
 => /^via$/
 >> 'viadotto' =~ rgx
 => nil
 >> 'ferrovia' =~ rgx
 => nil
 >> 'via' =~ rgx
 => 0