Scala Tuple Option

Question

If I have Scala tuple Option of the likes:

(Some(1), None)
(None, Some(1))
(None, None) 

And I want always to extract always the "Some" value if it exists, and otherwise get the None. The only way with pattern matching?

Answer 1

There is this:

def oneOf[A](tup: (Option[A], Option[A])) = tup._1.orElse(tup._2)

That will return the first option that is defined, or None if neither is.

Edit:

Another way to phrase the same thing is

def oneOf[A](tup:  (Option[A], Option[A])) = 
   tup match { case (first, second) => first.orElse(second) }

It's longer, but perhaps more readable.