Scala functional programming gymnastics

Question

I am trying to do the following in as little code as possible and as functionally as possible:

def restrict(floor : Option[Double], cap : Option[Double], amt : D         


        

Answer 1

Not quite as terse as the scalaz version, but on the other hand, no dependencies,

List(floor.getOrElse(Double.NegativeInfinity), cap.getOrElse(Double.PositiveInfinity), amt).sorted.apply(1)