Scala List of Options to Option of List
import scalaz.syntax.traverse._
import scalaz.std.list._
import scalaz.std.option._
myList.sequence
z0san
import scalaz.syntax.traverse._
import scalaz.std.list._
import scalaz.std.option._
myList.sequenceif (myList.exists(_.isEmpty)) None else Some(myList.map(_.get))