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Test whether Categorizable values are comparable.

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Rob Rix 2015-11-18 11:25:53 -08:00
parent f1eed7dac2
commit fba97d256b
1 changed files with 3 additions and 0 deletions
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src/Categorizable.hs
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@ -4,3 +4,6 @@ import Data.Set
class Categorizable a where
categories :: a -> Set String
comparable :: Categorizable a => a -> a -> Bool
comparable a b = Data.Set.null $ intersection (categories a) (categories b)