module ExtHashtbl

: sig

Extra functions over hashtables.

module Hashtbl : sig

type ('a, 'b) t = ('a, 'b) Hashtbl.t

The type of a hashtable.

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_option : ('a, 'b) Hashtbl.t -> 'a -> 'b option

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

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)

Please refer to the Ocaml Manual for documentation of these functions. (note : functor support removed to avoid code duplication).

val create : 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

end