NOTE: the latest version is 2.0.0
Permet de générer toutes les combinaisons d'une liste
choices [1,2,3] == [[],[3],[2],[2,3],[3,2],[1],[1,3],[3,1],[1,2],[2,1],[1,2,3],[2,1,3],[2,3,1],[1,3,2],[3,1,2],[3,2,1]]
split [1,2,3] == [([1],[2,3]),([1,2],[3])]