How to convert X => Option[R] to PartialFunction[X,R]

Question

As long as we have a PartialFunction[X,R] it\'s very easy to convert it to a function returning Option[R], e.g.

def pfToOptf[X, R](         


        

Answer 1

How about this:

Welcome to Scala version 2.8.0.r19650-b20091114020153 (Java HotSpot(TM) Client VM, Java 1.6.0_17).
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scala> def optfToPf[X,R](f: X => Option[R]): PartialFunction[X,R] = x => f(x) match {
     |     case Some(r) => r
     | }
optfToPf: [X,R](f: (X) => Option[R])PartialFunction[X,R]

scala>