Binary operator with Option arguments

Question

In scala, how do I define addition over two Option arguments? Just to be specific, let\'s say they\'re wrappers for Int types (I\'m actually working with maps of do

Answer 1

If they both default to 0 you don't need pattern matching:

  def addOpt(a:Option[Int], b:Option[Int]) = {
    a.getOrElse(0) + b.getOrElse(0)
  }