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Fix checking the existence of Genres... I'm sorry for that, @darrel-k!
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I still can't see that other commit page properly, unless I'm signed out of Github. Something very odd going on. I managed to post the comment from Chromium rather than Firefox, and then Chromium crashed!
Oh well.
As far as %$myClassicalGenreMap{uc($_)} goes, I thought I was just dereferencing $myClassicalGenreMap because the compiler insisted on it.
What am I getting wrong here?
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I haven't found the documentation for that syntax yet. From what I see from experimentation it seems to return the value and the key. In order to de-reference a hash ref you'd use the arrow notation.