package private;
our $my_scalar = 'my scalar';
our @my_array = qw(my array);

package main;
use strict;
use Data::Dumper;

# attempt to access the ARRAY portion of a scalar
*my_scalar_glob = $private::{my_scalar};
print "ARRAY portion of a scalar glob: " 
    . Dumper(*my_scalar_glob{ARRAY});

# attempt to access the SCALAR portion of an array
*my_array_glob = $private::{my_array};
print "SCALAR portion of an array glob: " 
    . Dumper(*my_array_glob{SCALAR});


__END__
# prints the following
ARRAY portion of a scalar glob: $VAR1 = undef;
SCALAR portion of an array glob: $VAR1 = \undef;