CS Study 2019/11/27

Search.scala

case class Point(x: Int, y: Int)
def traverse(p: Point): Int = p match {
  case Point(3, 3) => 
    1
  case Point(x, y) if x <= 3 && y <= 3 =>
    traverse(p.copy(x = p.x + 1)) +
    traverse(p.copy(y = p.y + 1))
  case Point(_, _) =>
    0
}
traverse(Point(1, 1)) // 6