github-tui/lib/list_extra.ml

let in_between ~sep list =
  let rec loop = function
    | [] -> []
    | x :: xs -> sep :: x :: loop xs
  in
  match list with
  | [] | [_] -> list
  | x :: xs -> x :: loop xs

let generate n f =
  let rec loop i =
    if i = n
      then []
      else f i :: loop (i + 1)
  in loop 0