let look state player = let room = Hashtbl.find state.rooms player.room in let items = String.concat "\n" (List.map item_look room.items) in let player_names_all = List.of_seq (Hashtbl.to_seq_keys room.players) in let player_names = remove player.name player_names_all in let players = String.concat "\n" (List.map player_look player_names) in let exit_names = List.of_seq (Hashtbl.to_seq_keys room.exits) in let exits = String.concat "\n" (List.map exit_look exit_names) in String.concat "\n" [room.description; items; players; exits]