Option, pattern matching, map, toList

gistfile1.scala

object ScalaHackSession {
  val some:Option[Int] = Some(1)                  //> some  : Option[Int] = Some(1)
  val none:Option[Int] = None                     //> none  : Option[Int] = None
  
  def map(option: Option[Int]) = option match {
    case None => None
    case Some(x) => Some(x*10)
  }                                               //> map: (option: Option[Int])Option[Int]
  map(some)                                       //> res0: Option[Int] = Some(10)
  map(none)                                       //> res1: Option[Int] = None
  
  def toList(option: Option[Int]) = option match {
    case None => Nil
    case Some(x) => List(x)
  }                                               //> toList: (option: Option[Int])List[Int]
  
  toList(some)                                    //> res2: List[Int] = List(1)
  toList(none)                                    //> res3: List[Int] = List()
}