Summing up two options

Question

Let\'s say I have two optional Ints (both can be Some or None):

val one : Option[Int] = Some(1)
val two : Option[Int] = Some(2)

My question is

Answer 1

for (x <-one; y <- two) yield x+y

Or the less readable but strictly equivalent:

one.flatMap{x=>two.map(x+_)}

UPDATE: As your latest edit made quite clear, you only want a None as the result when both the input options are None. In this case I don't think you'll get anything better in terms of simplicity than what you already use. I could shorten it a bit but overall this is just the same:

(one ++ two).reduceOption(_ + _)