Perl 5 version 6.0 documentation
- ref EXPR
Returns a true value if EXPR is a reference, false otherwise. If EXPR is not specified,
$_will be used. The value returned depends on the type of thing the reference is a reference to. Builtin types include:
If the referenced object has been blessed into a package, then that package name is returned instead. You can think of
See also perlref.