Quote

      Called in a scalar context, it
      returns the parameter list as a tied hash reference.
      Changing a key changes the value of the parameter in the
      underlying CGI parameter list.  Called in a list context,
      it returns the parameter list as an ordinary hash.  This
      allows you to read the contents of the parameter list, but
      not to change it.

Always code as if the guy who ends up maintaining your code will be a violent psychopath who knows where you live. -- Damian Conway in "Perl Best Practices"
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