Un-optioning an optioned Option

Question

Say I have a val s: Option[Option[String]]. It can thus have the following values:

Some(Some(\"foo\")) Some(None) None

Answer 1

You might use flatMap like the following:

val options = List(Some(Some(1)), Some(None), None)
options map (_ flatMap (a => a))

This will map the List[Option[Option[Int]]] to a List[Option[Int]].
If you just have an Option you can use it as following:

val option = Some(Some(2))
val unzippedOption = option flatMap (b => b)

This will flatten your Option[Option[Int]] to Option[Int].