spoertsch

  // List (immutable)
  val numbers: List[Int] = List(1, 2, 6, 34, 17, 42, 54, 100, 117, 1337)
  
  // Map (immutable)
  val map = Map("Test" -> 4, "ABC" -> 4)

  // List API
  // Filter
  numbers.filter(x => x < 4)
  numbers.filter(_ < 4)

spoertsch

  // object orientation
  trait Player
  case class EmptyPlayer() extends Player
  case class NamedPlayer(name: String) extends Player
  case class Score(p1: Int, p2: Int)

  // Vorteil case class: toString, hashcode, copy, == vs. eq
  val scoreA = Score(1, 2)
  scoreA.toString()
  scoreA.hashCode()

spoertsch

  // Class preconditions
  case class ScoreCond(p1: Int, p2: Int) {
    require(p1 != p2)
    require(p1 > 0 && p2 > 0)
  }

  ScoreCond(1, 2)

  // Unerlaubte Werte führen zu einer Illegal argument exception
  //ScoreCond(5, 5)