Some cards gist

card.scala

package scalera

package object card {
 
  sealed trait Suit
  object Suit {
    lazy val values = List(Spades, Diamonds, Hearts, Clubs)
  }
  case object Spades extends Suit
  case object Diamonds extends Suit
  case object Hearts extends Suit
  case object Clubs extends Suit
  
  object CRange extends Enumeration {
    type CRange = Range
    val _2 = Value("2")
    val _3 = Value("3")
    val _4 = Value("4")
    val _5 = Value("5")
    val _6 = Value("6")
    val _7 = Value("7")
    val _8 = Value("8")
    val _9 = Value("9")
    val _10 = Value("10")
    val J = Value("J")
    val Q = Value("Q")
    val K = Value("K")
    val A = Value("A")
  }
  
  type Number = CRange.Value
  
  sealed trait Card
  
  case class SimpleCard(number: Number, suit: Suit) extends Card
  case object Joker extends Card
  
  implicit object CardOrdering extends Ordering[Card]{
    def compare(c1: Card, c2: Card): Int = (c1, c2) match {
      case (Joker, c2: SimpleCard) => if (c2.number == CRange.A) 0 else 1
      case (c1: SimpleCard, Joker) => if (c1.number == CRange.A) 0 else -1
      case (Joker, Joker) => 0
      case (c1: SimpleCard, c2: SimpleCard) => c1.number.compare(c2.number)
    }
  }
  
  //  Nice constructors ...
  
  object Card{
    def apply(_number: Number, _suit: Suit): Card =
      SimpleCard(_number, _suit)
    def apply(_number: Int, _suit: Suit): Card = {
      require(_number >=2 && _number <= 10, "Not a valid card number")
      SimpleCard(CRange.withName(_number.toString), _suit)
    }
  }
   
}

deck.scala

package scalera

package object deck {
  
  import scalera.card._
  
  case class Deck(cards: List[Card]){
    def shuffle: Deck =
      Deck(scala.util.Random.shuffle(cards))
  }
  object Deck {
    
    def apply(jokerAmount: Int = 0): Deck = {
      val jokers = (0 to jokerAmount).map(_ => Joker).toList
      val cards = 
        for {
          suit <- Suit.values
          number <- CRange.values.toList
        } yield Card(number, suit)
      new Deck(cards ++ jokers)
    }
    
  }
  
}