Listing combinations WITH repetitions in Scala

Question

Trying to learn a bit of Scala and ran into this problem. I found a solution for all combinations without repetions here and I somewhat understand the idea behind i

Answer 1

This solution was posted on Rosetta Code: http://rosettacode.org/wiki/Combinations_with_repetitions#Scala

def comb[A](as: List[A], k: Int): List[List[A]] = 
    (List.fill(k)(as)).flatten.combinations(k).toList