Yes, in general one is better off to
- always default to private vars with my
- only use public our when really needed
But this is not always so, there are always exceptions to the rule.
Some modules use package vars for external config, e.g. Text::Glob or Data::Dumper °
Some even export readonly vars to be used as constants (instead of barewords without sigils)
°) of course TIMTOWTDI, these design patterns date back to the Perl4 times, which had neither OOP nor private lexical vars. Data::Dumper for instance has a dual API.
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