containers-data 3.2 · OCaml Package

Persistent Arrays

From the paper by Jean-Christophe Filliâtre, "A persistent Union-Find data structure", see the ps version

since 0.10

type 'a t

The type of persistent arrays

val make : int -> 'a -> 'a t

make n x returns a persistent array of length n, with x. All the elements of this new array are initially physically equal to x (in the sense of the == predicate). Consequently, if x is mutable, it is shared among all elements of the array, and modifying x through one of the array entries will modify all other entries at the same time.

raises Invalid_argument
if n < 0 or n > Sys.max_array_length. If the value of x is a floating-point number, then the maximum size is only Sys.max_array_length / 2.

val init : int -> (int -> 'a) -> 'a t

init n f returns a persistent array of length n, with element i initialized to the result of f i.

raises Invalid_argument
if n < 0 or n > Sys.max_array_length. If the value of x is a floating-point number, then the maximum size is only Sys.max_array_length / 2.

val get : 'a t -> int -> 'a

get a i returns the element with index i from the array a.

raises Invalid_argument
"index out of bounds" if n is outside the range 0 to Array.length a - 1.

val set : 'a t -> int -> 'a -> 'a t

set a i v sets the element index i from the array a to v.

raises Invalid_argument
"index out of bounds" if n is outside the range 0 to Array.length a - 1.

val length : 'a t -> int

Return the length of the persistent array.

val copy : 'a t -> 'a t

copy a returns a fresh copy of a. Both copies are independent.

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

val mapi : (int -> 'a -> 'b) -> 'a t -> 'b t

Apply the given function to all elements of the array, and return a persistent array initialized by the results of f. In the case of mapi, the function is also given the index of the element. It is equivalent to fun f t -> init (fun i -> f (get t i)).

val iter : ('a -> unit) -> 'a t -> unit

iter f t applies function f to all elements of the persistent array, in order from element 0 to element length t - 1.

val iteri : (int -> 'a -> unit) -> 'a t -> unit

iter f t applies function f to all elements of the persistent array, in order from element 0 to element length t - 1.

val fold_left : ('a -> 'b -> 'a) -> 'a -> 'b t -> 'a

val fold_right : ('a -> 'b -> 'b) -> 'a t -> 'b -> 'b

Fold on the elements of the array.

val append : 'a t -> 'a t -> 'a t

Append the two arrays.

since 0.13

val flatten : 'a t t -> 'a t

Concatenates all the sub-arrays.

since 0.13

val flat_map : ('a -> 'b t) -> 'a t -> 'b t

Flat map (map + concatenation).

since 0.13

val to_array : 'a t -> 'a array

to_array t returns a mutable copy of t.

val of_array : 'a array -> 'a t

of_array a returns an immutable copy of a.

val to_list : 'a t -> 'a list

to_list t returns the list of elements in t.

val of_list : 'a list -> 'a t

of_list l returns a fresh persistent array containing the elements of l.

val of_rev_list : 'a list -> 'a t

of_rev_list l is the same as of_list (List.rev l) but more efficient.

since 0.13

Conversions

type 'a iter = ('a -> unit) -> unit

type 'a gen = unit -> 'a option

val to_iter : 'a t -> 'a iter

val of_iter : 'a iter -> 'a t

val of_gen : 'a gen -> 'a t

since 0.13

val to_gen : 'a t -> 'a gen

since 0.13

IO

type 'a printer = Format.formatter -> 'a -> unit

val pp : 'a printer -> 'a t printer

since 0.13

package containers-data

Persistent Arrays

Conversions

IO