It means your professor is either overly tricky or should think his/her questions through a bit more. In the case of DBI the parens do nothing except take up space and maybe mislead someone.
~>ack \@EXPORT DBI.pm
@EXPORT = (); # we export nothing by default
@EXPORT_OK = qw(%DBI %DBI_methods hash); # also populated by export_ok
Update: DERP, didn't see the whole thread. CountZero is asking a good question. The answer to which is... left as an exercise for
the reader .
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