agrid is an OCaml library for adjustable grids. Adjustable grids are two dimensional arrays whose width/height can be changed by adding or removing row/column at either end (one at a time).

You should depend on agrid then :

let () =
  let grid = Agrid.of_list [[1; 2]; [3; 4]] in
  let grid = Agrid.snoc_row grid (Flex_array.of_list [5; 6]) in
  Agrid.pp Format.pp_print_int Format.std_formatter grid
  (* prints:
   * 1; 2
   * 3; 4
   * 5; 6
   *)

For more, have a look at the example folder or at the documentation.

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