(********************************************************************)
(*  OCaml code from the book ``Learn Programming with OCaml''       *)
(*  See https://usr.lmf.cnrs.fr/lpo/                                *)
(*                                                                  *)
(*  Sylvain Conchon and Jean-Christophe Filliâtre                   *)
(*  Copyright 2025 Université Paris-Saclay and CNRS                 *)
(*                                                                  *)
(*  Openly licensed via CC BY SA 4.0                                *)
(*  See https://creativecommons.org/licenses/by-sa/4.0/deed.en      *)
(********************************************************************)

(* Program 44 on page 233
   Deletion from a Hash Table *)

  let remove x h =
    let i = bucket_of x h in
    let b = h.buckets.(i) in
    if mem_bucket x b then begin
      h.size <- h.size - 1;
      h.buckets.(i) <- List.filter (fun y -> not (X.equal y x)) b
    end

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