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folone/gist:3911448

Created October 18, 2012 12:21
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State exercise
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gistfile1.scala
case class State[S, +A](run: S => (A, S)) {
def map[B](f: A => B): State[S, B] = sys.error("undefined")
def flatMap[B](f: A => State[S, B]): State[S, B] = sys.error("undefined")
def modify(f: S ⇒ S): State[S, A] = sys.error("undefined")
def put[S, A](s: S): State[S, Unit] = sys.error("undefined")
}
object State {
def point[S, A](a: => A): State[S, A] = sys.error("undefined")
}
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