Speaking of aesthetics, I find that example ambiguous. It's not obvious to me whether push is a method that just so happens to have the same name as the push keyword (the one which works on arrays) or whether it's an alternate way of writing that keyword. Is that a method which operates on a container (the array) or an object (not really a container)?
In my mind, one of Perl's OO flaws is unnecessarily confusing containers and objects. An object may have containers, but should it be one?
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