Created
March 22, 2016 17:01
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| scala> case class Callback[A](f: (A => Unit) => Unit) { | |
| | def map[B](g: A => B): Callback[B] = Callback { (h: B => Unit) => f(a => h(g(a))) } | |
| | def flatMap[B](g: A => Callback[B]): Callback[B] = Callback { (h: B => Unit) => f(a => g(a).f(b => h(b))) } | |
| | } | |
| defined class Callback |
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