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• [Haskell] Set of an Unordered Data Type with a given ordering

  - by Ingdas

  I'm trying to put this data type in a Haskell Set, but I don't want to give it a general instance of Ord. So I want to give the set an ordering on y-coördinate but without instance Ord Vector. Is this possible? data Vector = V { x :: Double , y :: Double } deriving (Eq)

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• Multithreaded Haskell

  - by Ingdas

  Hi I'm learning Haskell and I'd like to write some multithreaded programs now to see the performance gains from that in a functional language. I can find some references to it on the internet but never a proper introduction to it. Can anyone point me to a guide which is understandable for someone who knows the syntax fairly well, but is not a wizard in Haskell?

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