[Haskell-cafe] ANN: HCard -- A library for implementing card-like structures.

[Joe Fredette]

HCard, is a library which supports a card-like data structures, it uses 
associated types [1] to provide shuffling, dealing, and other 
facilities. It's
general enough to support many different types of playing cards, it 
currently comes with the common "French Deck" (4-suit, 13 card deck that 
is very common in the US) implemented and an example (though untested) 
cribbage scoring application.

You can find HCard here [2,3], and a post about it's use of associated 
types here [1].

On another note, I can't think of a good reason I should be using 
associated types, as I explain in [1]. Well, no good reason other than 
the "cool factor" -- can anyone enlighten me on a possible practical 
benefit of using Assoc types as opposed to a simple indexed record?

Anyway, enjoy HCard!

/Joe Fredette

[1] 
http://lowlymath.net/2009/card-games-scorekeeping-and-associated-datatypes/
[2] darcs get http://patch-tag.com/publicrepos/HCard
[3] http://hackage.haskell.org/cgi-bin/hackage-scripts/package/HCard
   
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