小编sal*_*lek的帖子

如何连接字符串选项列表？

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 |> ????