scala - 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

I want to reduce it so that the first becomes Some("foo") while the two others become None. Obviously there are many ways to accomplish this, but I'm looking for a simple, perhaps built-in, less-than-one-liner.

question from:https://stackoverflow.com/questions/5968345/un-optioning-an-optioned-option

Answer 1

It's a shame that flatten doesn't exist. It should.

Flatten does exist now.

As before,

s getOrElse None

(in addition to the other answers) will also do the same thing.