#!/usr/bin/env ruby
# This code comes from http://ruby-it.org/pages/Escape+Di+Caratteri+Speciali
# Check the page for copyright notice and explanations



  stringa.gsub(/[caratteri]/) { |match| "\\"+match }

  stringa.gsub(/[carat]/) { |match| match*2 }

  stringa.gsub(/c/) { |match| match*2 }

  str.gsub(/['"]/) { |match| match*2 }