Perl Programming/Keywords/ref

Perl redo rename Keywords The ref keyword The ref function returns a non-empty string, if EXPRESSION is a reference and an empty string otherwise. Without EXPRESSION, $_ will be used. The returned value depends on the thing referenced to. ref knows the following types: Type Notes ARRAY reference to an array CODE FORMAT GLOB HASH reference to a hash IO LVALUE reference to an lvalue that is not a variable REF reference to a reference Regexp regular expression resulting from qr// SCALAR reference to a scalar VSTRING If the referenced object has been blessed into a package, the name of that package is returned instead. This, however, is now considered "bad practice". Syntax ref EXPRESSION ref Perl redo rename Keywords