Reason · Reason lets you write simple, fast and quality type safe code while leveraging both the JavaScript & OCaml ecosystems.

sig
 type key
 type !'a t
 val create : int -> 'a Hashtbl.S.t
 val clear : 'a Hashtbl.S.t -> unit
 val reset : 'a Hashtbl.S.t -> unit
 val copy : 'a Hashtbl.S.t -> 'a Hashtbl.S.t
 val add : 'a Hashtbl.S.t -> Hashtbl.S.key -> 'a -> unit
 val remove : 'a Hashtbl.S.t -> Hashtbl.S.key -> unit
 val find : 'a Hashtbl.S.t -> Hashtbl.S.key -> 'a
 val find_opt : 'a Hashtbl.S.t -> Hashtbl.S.key -> 'a option
 val find_all : 'a Hashtbl.S.t -> Hashtbl.S.key -> 'a list
 val replace : 'a Hashtbl.S.t -> Hashtbl.S.key -> 'a -> unit
 val mem : 'a Hashtbl.S.t -> Hashtbl.S.key -> bool
 val iter : (Hashtbl.S.key -> 'a -> unit) -> 'a Hashtbl.S.t -> unit
 val filter_map_inplace :
  (Hashtbl.S.key -> 'a -> 'a option) -> 'a Hashtbl.S.t -> unit
 val fold : (Hashtbl.S.key -> 'a -> 'b -> 'b) -> 'a Hashtbl.S.t -> 'b -> 'b
 val length : 'a Hashtbl.S.t -> int
 val stats : 'a Hashtbl.S.t -> Hashtbl.statistics
 val to_seq : 'a Hashtbl.S.t -> (Hashtbl.S.key * 'a) Stdlib.Seq.t
 val to_seq_keys : 'a Hashtbl.S.t -> Hashtbl.S.key Stdlib.Seq.t
 val to_seq_values : 'a Hashtbl.S.t -> 'a Stdlib.Seq.t
 val add_seq : 'a Hashtbl.S.t -> (Hashtbl.S.key * 'a) Stdlib.Seq.t -> unit
 val replace_seq :
  'a Hashtbl.S.t -> (Hashtbl.S.key * 'a) Stdlib.Seq.t -> unit
 val of_seq : (Hashtbl.S.key * 'a) Stdlib.Seq.t -> 'a Hashtbl.S.t
end