...

my @nothing = nothing ();
my @retNothing = retNothing ();
my @retUndef = retUndef ();
my @retFalse = retFalse ();
my @retFalse2 = -retFalse ();

Dump (\@nothing);
Dump (\@retNothing);
Dump (\@retUndef);
Dump (\@retFalse);
Dump (\@retFalse2);

...