scala interesting code

interesting.scala

def twoPermutation[T](l: List[T))  = {
  l flatMap { a =>
    l flatMap { b =>
      if (a==b) 
        Nil
      else 
        List(a,b)
    }
  }
}

def twoPermutation[T](l: List[T]) = {
  for {
    a <- l
    b <- l if a != b
  } yield (a,b)
  }
}

So amazing :))