Question

let total = [| "1X2"; "3X4"; "5X6" |]

let oddEven = total
            |> Array.map(fun x -> x.Split('X'))

I have an array of string, which is total in above example, I want to split the array by “X”, as the oddEven in the above example, but I want to return 2 arrays of strings:

let odd = [| 1; 3; 5 |] and let even = [| 2; 4; 6 |]

It could be an easy task, but I can not figure it out now.
Any help is greatly appreciated!
Thanks,

Answer 1

You should check whether each string can split into two pieces, and unzip the result:

let total = [| "1X2"; "3X4"; "5X6" |]

let odds, evens = total |> Array.map (fun x ->  match x.Split('X') with
                                                | [|odd; even|] -> odd, even
                                                | _ -> failwith "Wrong input")
                        |> Array.unzip;;