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



 >> s1='ciao'
 => "ciao"
 >> s2=s1
 => "ciao"
 >> s1.object_id==s2.object_id
 => true

 >> s1='ciao'
 => "ciao"
 >> s2=s1.dup
 => "ciao"
 >> p s1.object_id, s2.object_id
 20905692
 20897916
 => nil

 >> s3=s2.clone
 => "ciao"
 >> p s1.object_id,s2.object_id,s3.object_id
 20905692
 20897916
 20877096
 => nil

 >> s1== s2 and s2== s3
 => true