in reply to Using "my" suppresses "Name used only once" warning?

If you want to make warnings fatal, try use warnings 'FATAL';, or, for specifc categories of warning, use warnings qw(FATAL numeric).

To find where a variable is used, declared, etc, try B::Xref.

As to the main point of your post, yeah, I think you're right.

Warning: Unless otherwise stated, code is untested. Do not use without understanding. Code is posted in the hopes it is useful, but without warranty. All copyrights are relinquished into the public domain unless otherwise stated. I am not an angel. I am capable of error, and err on a fairly regular basis. If I made a mistake, please let me know (such as by replying to this node).

In Section Seekers of Perl Wisdom