[richcollins]

I guess what I meant to ask is what is the point of this code - what operation is it performing.

[fizx]

    scala> List(1,2,3).flatMap(n => List(n, n*2))         
    res7: List[Int] = List(1, 2, 2, 4, 3, 6)

[omaranto]

That small snippet is the declaration of flatMap, i.e., it doesn't do anything if by do you mean compute.