even after your update, you probably still want to change the main example in your post ... the initial code black already has the param assigned to a temp variable in the my $arg_ref = shift; line and demonstrates the spirit of the refactoring -- it should be your "post refactoring" example. Your "pre refactoring" example should have every line modifying $_[0] directly.

In reply to Re: Refactoring Perl #7 - Remove Assignments to Parameters by hossman
in thread Refactoring Perl #7 - Remove Assignments to Parameters by agianni

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