&$cmd; is not the same as &$cmd();. With &$cmd;, you'll get the parent's @_, which means @_ could have values even though no arguments were provided. It also means you risk clobbering the parent's @_. I advise against &$cmd;.

In reply to Re^2: calling a function as a value from a hash by ikegami
in thread calling a function as a value from a hash by shobhit

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