The standard references for style are perlstyle and Perl Best Practices, and neither say anything about initialising variables specifically. PBP says to initialise localised variables, but you specifically mention my. PBP also says to initialise attributes, but again that's probably not what you mean. perltidy does not appear to care, and Perl::Critic is silent on the matter. My view is that if you have a good reason to initialise them then do so, if not, why bother? You don't have to impress anyone else, do you?
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