OCaml functional update example

the_game.ml

type coordinates = {x: int; y: int} (* Define a record type for coordinates *)
type player = {name: string; coordinates: coordinates} (* Define a record type for players *)

let richou = {name = "Richou"; coordinates = {x=0; y=0}} (* Define a new player *)

(* This is called a functional update.
 * It creates a new record "based on" an existing record.
 *)
 
let richou2 = {richou with coordinates = {x=1; y=1}}