ljuglaret/combinatoire/1.0.0

module Combinatoire exposing(choices)

{-|

interleave 4 [1,2] => [[4,1,2],[1,4,2],[1,2,4]]

subs[4,1,2] => [[],[2],[1],[1,2],[4],[4,2],[4,1],[4,1,2]]

perms[4,1,2] [[4,1,2],[1,4,2],[1,2,4],[4,2,1],[2,4,1],[2,1,4]]

split[1,2,3,4]
[([1],[2,3,4]),([1,2],[3,4]),([1,2,3],[4])]

-}

interleave : Int -> List Int -> List(List Int)