use 5.007003; # perl v5.7.3; required for List::Util to be available in CORE

I must be missing something but I fail to see the advantage of this. You are deliberately disallowing users with perl 5.7.0 (say) the opportunity to run this script even if they have List::Util installed. Why would you do that?

In reply to Re^3: Assigning default values to function arguments which may be “empty” by hippo
in thread Assigning default values to function arguments which may be “empty” by Wyrdweaver

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