Hi Wise monks.

I've got one question about scalar polymorphism:

How do I do to set up a scalar value eg '$foo' which has a numeric value in a numeric context and has a string value in a string context ?

For instance, I'd like to do something like that:

  my $err = ???? ;

  my $num = $err + 0 ;
  print $num ; # Will print lets say the number '1' ;
  print $err ; # Will print the string    'ERROR 1' ;
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I saw this type of behaviour in BerkeleyDB module and I wonder how it works.

Thanks for your precious help.