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

I'll start with this:

def restrict(floor : Option[Double], cap : Option[Double], amt : Double) : Double = {
  val flooring = floor.map(f => (_: Double) max f).getOrElse(identity[Double] _)       
  val capping  = cap.map(f => (_: Double) min f).getOrElse(identity[Double] _)         
  (flooring andThen capping)(amt)                                                      
}                                                                                    

But I have the feeling I'm missing some opportunity here, so I may not be finished.