object play {
  println("Welcome to the Scala worksheet")
  
  case class User(id:Int, name:String)
  def getUser:User = null
  def processUser(u:User):String= u.name
 Option(getUser)
  
  Option(getUser).fold("Sky")(u=>processUser(u))
  
  
  object SValue {
    def apply[T, P <: Any](a: T, f: T => P)(implicit defaultValue: P) = Option(a).fold(defaultValue)(f)
  }
  
  SValue(getUser,processUser)("Sky")
  
}