gistfile1.txt

scala> import scalaz.syntax._, validation._, either._, monadPlus._
import scalaz.syntax._
import validation._
import either._
import monadPlus._

scala> import scalaz.std.list._
import scalaz.std.list._

scala> List(1.left, 2.left, "bad".right, "really bad".right).separate
res0: (List[Int], List[String]) = (List(1, 2),List(bad, really bad))

scala> List(1.success[List[String]], "bad".failure[List[Int]], "really bad".failure[List[Int]], 2.success[List[String]]) 
res1: List[scalaz.Validation[Object,Any]] = List(Success(1), Failure(bad), Failure(really bad), Success(2))