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markhibberd/x.scala

Created February 7, 2014 05:54
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x.scala
def x[M[_]: MonadPlus, A, B](xs: List[A], f: A => M[B]): M[B] =
xs.foldLeft(implicitly[MonadPlus[M]].empty[B])((acc, a) => implicitly[MonadPlus[M]].plus(acc, f(a)))
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