2
如何連接字符串選項列表?F#連接字符串選項列表
let m = [ ""; "12"; "a"; "b"]
// I can join these with
m |> List.toSeq |> String.concat "\n"
// now I got a list of string option list
let l = [Some ""; None; Some "a"; Some "b"]
l |> List.toSeq |> ????