Usually, when you want a hashreference, you use the
$
prototype. After all, a hash reference is a scalar. The
prototypes
\% and
\@ are special. It means
that a variable in that slot has to start with a
%
or a
@, and that the hash or array will not be
flattened out. You would use this to prototype functions with
a similar behaviour as
keys or
push.
-- Abigail