Up  

Module ExtHashtbl.Hashtbl

module Hashtbl: sig .. end
type ('a, 'b) t = ('a, 'b) Stdlib.Hashtbl.t

The type of a hashtable.

New Functions 
val exists : ('a, 'b) t -> 'a -> bool

exists h k returns true is at least one item with key k is found in the hashtable.

val keys : ('a, 'b) t -> 'a Enum.t

Return an enumeration of all the keys of a hashtable. If the key is in the Hashtable multiple times, all occurrences will be returned.

val values : ('a, 'b) t -> 'b Enum.t

Return an enumeration of all the values of a hashtable.

val enum : ('a, 'b) t -> ('a * 'b) Enum.t

Return an enumeration of (key,value) pairs of a hashtable.

val of_enum : ('a * 'b) Enum.t -> ('a, 'b) t

Create a hashtable from a (key,value) enumeration.

val find_default : ('a, 'b) t -> 'a -> 'b -> 'b

Find a binding for the key, and return a default value if not found

val find_opt : ('a, 'b) Stdlib.Hashtbl.t -> 'a -> 'b option

Find a binding for the key, or return None if no value is found

val find_option : ('a, 'b) Stdlib.Hashtbl.t -> 'a -> 'b option

compatibility, use find_opt

val remove_all : ('a, 'b) t -> 'a -> unit

Remove all bindings for the given key

val map : ('b -> 'c) -> ('a, 'b) t -> ('a, 'c) t

map f x creates a new hashtable with the same keys as x, but with the function f applied to all the values

val length : ('a, 'b) t -> int

Return the number of elements inserted into the Hashtbl (including duplicates)

val reset : ('a, 'b) t -> unit
val randomize : unit -> unit
type statistics = Stdlib.Hashtbl.statistics = {
   num_bindings : int;
   num_buckets : int;
   max_bucket_length : int;
   bucket_histogram : int array;
} 
val stats : ('a, 'b) t -> statistics
val seeded_hash_param : int -> int -> int -> 'a -> int
val seeded_hash : int -> 'a -> int
val is_randomized : unit -> bool
val filter_map_inplace : ('a -> 'b -> 'b option) -> ('a, 'b) t -> unit
Older Functions

Please refer to the Ocaml Manual for documentation of these functions.

val create : ?random:bool -> int -> ('a, 'b) t
val clear : ('a, 'b) t -> unit
val add : ('a, 'b) t -> 'a -> 'b -> unit
val copy : ('a, 'b) t -> ('a, 'b) t
val find : ('a, 'b) t -> 'a -> 'b
val find_all : ('a, 'b) t -> 'a -> 'b list
val mem : ('a, 'b) t -> 'a -> bool
val remove : ('a, 'b) t -> 'a -> unit
val replace : ('a, 'b) t -> 'a -> 'b -> unit
val iter : ('a -> 'b -> unit) -> ('a, 'b) t -> unit
val fold : ('a -> 'b -> 'c -> 'c) -> ('a, 'b) t -> 'c -> 'c
val hash : 'a -> int
val hash_param : int -> int -> 'a -> int
val to_seq : ('a, 'b) t -> ('a * 'b) Stdlib.Seq.t

*_seq functions were introduced in OCaml 4.07.0, and are _not_ implemented in extlib for older OCaml versions

val to_seq_keys : ('a, 'b) t -> 'a Stdlib.Seq.t
val to_seq_values : ('a, 'b) t -> 'b Stdlib.Seq.t
val add_seq : ('a, 'b) t -> ('a * 'b) Stdlib.Seq.t -> unit
val replace_seq : ('a, 'b) t -> ('a * 'b) Stdlib.Seq.t -> unit
val of_seq : ('a * 'b) Stdlib.Seq.t -> ('a, 'b) t

Functor interface forwards directly to stdlib implementation (i.e. no enum functions)

module type HashedType = Stdlib.Hashtbl.HashedType
module type S = Stdlib.Hashtbl.S
module Make: Stdlib.Hashtbl.Make
module type SeededHashedType = Stdlib.Hashtbl.SeededHashedType
module type SeededS = Stdlib.Hashtbl.SeededS
module MakeSeeded: Stdlib.Hashtbl.MakeSeeded