Converting a tuple of options to an option of tuple with Scalaz or Shapeless

Question

Having

(Some(1), Some(2))

I expect to get

Some((1, 2))

and having

(Some(1), None)
         


        

Answer 1

scala> import scalaz._
import scalaz._

scala> import Scalaz._
import Scalaz._

scala> (Tuple2.apply[Int, Int] _).lift[Option].tupled
res5: (Option[Int], Option[Int]) => Option[(Int, Int)] = 

scala> res5((some(3), some(11)))
res6: Option[(Int, Int)] = Some((3,11))

scala> res5((some(3), none))
res7: Option[(Int, Int)] = None