Further to my ramblings here about creating a hash that has multiple values per key I have gone the whole hog and written an object to perform this function having been advised that no such object currently exists.
No such object
currently exists because you are describing a hash-of-arrayrefs, which is a built-in to Perl.
I concur with the other heavy hitters that have weighed in on this thread already. Your module would never be included in code that I wrote, nor recommended by me in a publication I'm writing or class that I'm teaching. You are abstracting something that in this form does not need abstraction.
For an extreme example of the absurdity of this approach, check out the Meta hierarchy. Be sure you're sitting down while reading it, and not current swallowing any liquids.
-- Randal L. Schwartz, Perl hacker
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