in reply to Determining the type of a subroutine parameter

I don't think that quite answers the OP i.e. from the POV of a scalar variable - to use the given example ... 

sub foo { print "Type: ", ref $_[0], "\n"; }

my ( $scalar, @array );

foo( $scalar );
foo( \$scalar );
foo( \@array );


__END__
Type:
Type: SCALAR
Type: ARRAY

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This to determine if a scalar has been passed, calling ref on it will return the empty string.

HTH ,

A user level that continues to overstate my experience :-))

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