I should have pointed you to this documentation earlier: "perlootut - Object-Oriented Programming in Perl Tutorial".

Under Inheritance, you'll find "is-a"; under Composition, you'll find "has-a"; "needs-a" is not mentioned.

It sounds like your constructor should perhaps be more like: new(mode => $mode, data => $data); and you want a method like: is_file_mode().

— Ken

In reply to Re^5: OO manner of accessing static variables in a subclass? by kcott
in thread OO manner of accessing static variables in a subclass? by HipDeep

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