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eklitzke/gist:137194

Created June 28, 2009 03:51
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gistfile1.hs
type Ctx = Map String Double
fetch :: Ctx -> String -> Double
fetch = fromJust . lookup
data Orbit = Orbit IORef Position Velocity
class AltStrategy s where
impulse :: s -> Ctx -> Orbit -> IO (Ctx, Double, Double)
isDone :: s -> OuputPorts -> Bool
isDone _ ports = (fromJust $ lookup 0 ports) /= 0
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