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This new version is terser while still expressing what I want.
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Joker constructor takes a rank for uniqueness - rank doesn't really
change anything in terms of the "power" of a joker but helps with
ensuring jokers are unique in a deck.
Deck constructor takes an optional argument for the number of decks.
A deck includes two jokers, so n decks include 2n jokers.
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Because I assume n is modded already.
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I can now use this package for a console application since we can
pretty print cards.
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Generally, ACE is the best card in Cantedraw in a card-by-card basis
thus it should be the higher when comparing.
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Given n in 0..51, certainly there exists r, s s.t. `n = 13s + r`
where r in 0..12 and s in 0..3. `r` is the rank, and `s` is the suit.
ranks are ordered Ace, 2, 3, ..., Queen, King and suits are ordered
Diamond, Club, Heart, Spade.
Therefore there is a 1-1 correspondence between 0..51 and any card in
the deck.
Jokers are a bit less straightforward; for now I'll define them as an
outlier which doesn't exist in the same bounds (which is why they're
the default return for suit in int->suit). Likely I'll go for -1
representing a Joker.
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Time to do the fun non-yakshaving part. I'll start out by writing
some custom types for the objects of concern: ranks, suits, cards and
sets of cards.
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