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Set consolidation: Difference between revisions
added ocaml
(added Bracmat) |
(added ocaml) |
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[map[A:true C:true B:true D:true] map[G:true F:true I:true H:true K:true]]
</pre>
=={{header|OCaml}}==
<lang ocaml>let join a b =
List.fold_left (fun acc v ->
if List.mem v acc then acc else v::acc
) b a
let share a b =
let rec aux = function
| x::xs -> List.mem x b || aux xs
| [] -> false
in
aux a
let extract p lst =
let rec aux acc = function
| x::xs -> if p x then Some (x, List.rev_append acc xs) else aux (x::acc) xs
| [] -> None
in
aux [] lst
let consolidate sets =
let rec aux acc = function
| [] -> List.rev acc
| x::xs ->
match extract (share x) xs with
| Some (y, ys) -> aux acc ((join x y) :: ys)
| None ->
aux (x::acc) xs
in
aux [] sets
let print_sets sets =
print_string "{ ";
List.iter (fun set ->
print_string "{";
print_string (String.concat " " set);
print_string "} "
) sets;
print_endline "}"
let () =
print_sets (consolidate [["A";"B"]; ["C";"D"]]);
print_sets (consolidate [["A";"B"]; ["B";"C"]]);
print_sets (consolidate [["A";"B"]; ["C";"D"]; ["D";"B"]]);
print_sets (consolidate [["H";"I";"K"]; ["A";"B"]; ["C";"D"]; ["D";"B"];
["F";"G";"H"]]);
;;</lang>
=={{header|Python}}==
| |||