perllexwarn explains why use warnings is better than -w. use warnings FATAL => 'all' is even better than use warnings. And if you expect warnings to do parameter validation for you, you should be extra careful. It's usually easier to check them.

In reply to Re^2: Modifying Arrays passed by reference to subroutine by akho
in thread Modifying Arrays passed by reference to subroutine by sadarax

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