Question

Possible Duplicate:
Scala – can yield be used multiple times with a for loop?
Cartesian product of two lists

I try to combine some Scala Lists the following way, but no success so far.

List (List ("abc", "def"), List ("gh", "ij", "kl"), List ("mnop") ...)

-> The result should be

List(
List("abc", "gh", "mnop"),
List("abc", "ij", "mnop"),
List("abc", "kl", "mnop"),
List("def", "gh", "mnop"),
List("def", "ij", "mnop"),
List("def", "kl", "mnop")
)

Answer 1

for {
  a <- List("abc","def")
  b <- List("gh", "ij", "kl")
  c <- List("mnop")
} yield List(a, b, c)