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deque-blog/taking.idr

Last active July 28, 2017 17:49
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taking.idr
taking : Nat -> Transducer acc s (Nat, s) a a
taking n = statefulTransducer n takeImpl
where
takeImpl next (Z, acc) a = pure (Done (Z, acc))
takeImpl next (n, acc) a = withState (pred n) <$> next acc a
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