I believe the issue is really one of appearences. map and File::Find accept a code block, a function and/or a reference to a function. From my ignorant perspective they are anonymous functions and from the imparative way of looking of things this is not how you do it. These anonymous functions do not look like objects so it can not be right from an object oriented view.

I realize this is actually some of the LISP concepts showing through and I think of it as a lambda function in LISP which makes it easier to work with. But most working programmers have little exposier to LISP and I think that some exposier would help. This is a crude explantaion but this is how I see it.