反转F＃中的列表列表

Question

I want to reverse a function called revLists that takes a list of lists and reverses all the sub-lists.

Any suggestion will help.

This is my idea:

let revLists[[]] = List.map (fun [[]] -> List.rev);;
revLists[[1;2;3],[4;5]];;

Answer 1

let lists = [[1;2;3];[4;5]]
let reverseLists list = list |> List.map List.rev

> reverseLists lists;;         
val it : int list list = [[3; 2; 1]; [5; 4]]