package containers
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Growable, mutable vector

type ro = [
  1. | `RO
]
type rw = [
  1. | `RW
]

Mutability is rw (read-write) or ro (read-only).

type ('a, 'mut) t

The type of a vector of elements of type 'a, with a mutability flat 'mut.

type 'a vector = ('a, rw) t

Type synonym: a 'a vector is mutable.

type 'a ro_vector = ('a, ro) t

Alias for immutable vectors.

  • since 0.15
type 'a sequence = ('a -> unit) -> unit
type 'a klist = unit -> [ `Nil | `Cons of 'a * 'a klist ]
type 'a gen = unit -> 'a option
type 'a equal = 'a -> 'a -> bool
type 'a ord = 'a -> 'a -> int
type 'a printer = Format.formatter -> 'a -> unit
val freeze : ('a, _) t -> ('a, ro) t

Make an immutable vector (no copy! Don't use the old version).

val freeze_copy : ('a, _) t -> ('a, ro) t

Copy the vector into an immutable version.

val create : unit -> ('a, rw) t

Create a new, empty vector.

val create_with : ?capacity:int -> 'a -> ('a, rw) t

Create a new vector, using the given value as a filler.

  • parameter capacity

    the size of the underlying array. caution: the value will likely not be GC'd before the vector is.

val return : 'a -> ('a, 'mut) t

Singleton vector.

  • since 0.14
val make : int -> 'a -> ('a, 'mut) t

make n x makes a vector of size n, filled with x.

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

Init the vector with the given function and size.

val clear : ('a, rw) t -> unit

Clear the content of the vector.

val ensure_with : init:'a -> ('a, rw) t -> int -> unit

Hint to the vector that it should have at least the given capacity.

  • parameter init

    if capacity v = 0, used as a filler element for the underlying array (see create_with).

  • since 0.14
val ensure : ('a, rw) t -> int -> unit

Hint to the vector that it should have at least the given capacity. Just a hint, will not be enforced if the vector is empty and init is not provided.

val is_empty : ('a, _) t -> bool

Is the vector empty?

val push : ('a, rw) t -> 'a -> unit

Add an element at the end of the vector.

val append : ('a, rw) t -> ('a, _) t -> unit

append a b adds all elements of b to a.

val append_array : ('a, rw) t -> 'a array -> unit

Like append, with an array.

val append_seq : ('a, rw) t -> 'a sequence -> unit

Append content of sequence.

val append_list : ('a, rw) t -> 'a list -> unit

Append content of list.

  • since 0.14
val append_gen : ('a, rw) t -> 'a gen -> unit

Append content of generator.

  • since 0.20
val equal : 'a equal -> ('a, _) t equal
val compare : 'a ord -> ('a, _) t ord

Total ordering on vectors. Lexicographic comparison.

exception Empty

Raised on empty stack.

val pop : ('a, rw) t -> 'a option

Remove last element, or None.

val pop_exn : ('a, rw) t -> 'a

Remove last element, or raise a Failure if empty.

  • raises Empty

    on an empty vector.

val top : ('a, _) t -> 'a option

Top element, if present.

  • since 0.6
val top_exn : ('a, _) t -> 'a

Top element, if present.

  • raises Empty

    on an empty vector.

  • since 0.6
val copy : ('a, _) t -> ('a, 'mut) t

Shallow copy (may give an immutable or mutable vector).

val shrink : ('a, rw) t -> int -> unit

Shrink to the given size (remove elements above this size). Does nothing if the parameter is bigger than the current size.

val member : eq:('a -> 'a -> bool) -> 'a -> ('a, _) t -> bool

Is the element a member of the vector?

val sort : ('a -> 'a -> int) -> ('a, _) t -> ('a, 'mut) t

Sort the vector, returning a copy of it that is sorted w.r.t the given ordering. The vector itself is unchanged.

val sort' : ('a -> 'a -> int) -> ('a, rw) t -> unit

Sort the vector in place (modifying it).

val uniq_sort : ('a -> 'a -> int) -> ('a, rw) t -> unit

Sort the array and remove duplicates, in place (e.g. modifying the vector itself).

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

Iterate on the vector's content.

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

Iterate on the vector, with indexes.

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

Map elements of the vector, yielding a new vector.

val map_in_place : ('a -> 'a) -> ('a, _) t -> unit

Map elements of the vector in place

  • since 2.3
val filter : ('a -> bool) -> ('a, _) t -> ('a, 'mut) t

Filter elements from the vector. filter p v leaves v unchanged but returns a new vector that only contains elements of v satisfying p.

val filter' : ('a -> bool) -> ('a, rw) t -> unit

Filter elements in place.

val fold : ('b -> 'a -> 'b) -> 'b -> ('a, _) t -> 'b

Fold on elements of the vector

val exists : ('a -> bool) -> ('a, _) t -> bool

Existential test (is there an element that satisfies the predicate?).

val for_all : ('a -> bool) -> ('a, _) t -> bool

Universal test (do all the elements satisfy the predicate?).

val find : ('a -> bool) -> ('a, _) t -> 'a option

Find an element that satisfies the predicate.

val find_exn : ('a -> bool) -> ('a, _) t -> 'a

Find an element that satisfies the predicate, or

  • raises Not_found

    if no element does.

val find_map : ('a -> 'b option) -> ('a, _) t -> 'b option

find_map f v returns the first Some y = f x for x in v, or None if f x = None for each x in v.

  • since 0.14
val filter_map : ('a -> 'b option) -> ('a, _) t -> ('b, 'mut) t

Map elements with a function, possibly filtering some of them out.

val filter_map_in_place : ('a -> 'a option) -> ('a, _) t -> unit

Filter-map elements of the vector in place

  • since 2.3
val flat_map : ('a -> ('b, _) t) -> ('a, _) t -> ('b, 'mut) t

Map each element to a sub-vector.

val flat_map_seq : ('a -> 'b sequence) -> ('a, _) t -> ('b, 'mut) t

Like flat_map, but using sequence for intermediate collections.

  • since 0.14
val flat_map_list : ('a -> 'b list) -> ('a, _) t -> ('b, 'mut) t

Like flat_map, but using List for intermediate collections.

  • since 0.14
val (>>=) : ('a, _) t -> ('a -> ('b, _) t) -> ('b, 'mut) t

Infix version of flat_map.

val (>|=) : ('a, _) t -> ('a -> 'b) -> ('b, 'mut) t

Infix version of map.

val get : ('a, _) t -> int -> 'a

Access element by its index, or

  • raises Invalid_argument

    if bad index.

val set : ('a, rw) t -> int -> 'a -> unit

Modify element at given index, or

  • raises Invalid_argument

    if bad index.

val remove : ('a, rw) t -> int -> unit

Remove the n-th element of the vector. Does NOT preserve the order of the elements (might swap with the last element).

val rev : ('a, _) t -> ('a, 'mut) t

Reverse the vector.

val rev_in_place : ('a, rw) t -> unit

Reverse the vector in place.

  • since 0.14
val rev_iter : ('a -> unit) -> ('a, _) t -> unit

rev_iter f a is the same as iter f (rev a), only more efficient.

  • since 0.14
val size : ('a, _) t -> int

Number of elements in the vector.

val length : (_, _) t -> int

Synonym for size.

val capacity : (_, _) t -> int

Number of elements the vector can contain without being resized.

val unsafe_get_array : ('a, rw) t -> 'a array

Access the underlying shared array (do not modify!). unsafe_get_array v is longer than size v, but elements at higher index than size v are undefined (do not access!).

val (--) : int -> int -> (int, 'mut) t

Range of integers, either ascending or descending (both included, therefore the result is never empty). Example: 1 -- 10 returns the vector [1;2;3;4;5;6;7;8;9;10].

val (--^) : int -> int -> (int, 'mut) t

Range of integers, either ascending or descending, but excluding right. Example: 1 --^ 10 returns the vector [1;2;3;4;5;6;7;8;9].

  • since 0.17
val of_array : 'a array -> ('a, 'mut) t

of_array a returns a vector corresponding to the array a. Operates in O(n) time.

val of_list : 'a list -> ('a, 'mut) t
val to_array : ('a, _) t -> 'a array

to_array v returns an array corresponding to the vector v.

val to_list : ('a, _) t -> 'a list

Return a list with the elements contained in the vector.

val of_seq : ?init:('a, rw) t -> 'a sequence -> ('a, rw) t
val to_seq : ('a, _) t -> 'a sequence

Return a sequence with the elements contained in the vector.

val to_seq_rev : ('a, _) t -> 'a sequence

to_seq_rev v returns the sequence of elements of v in reverse order, that is, the last elements of v are iterated on first.

  • since 0.14
val slice : ('a, rw) t -> 'a array * int * int

Vector as an array slice. By doing it we expose the internal array, so be careful!.

val slice_seq : ('a, _) t -> int -> int -> 'a sequence

slice_seq v start len is the sequence of elements from v.(start) to v.(start+len-1).

val fill_empty_slots_with : ('a, _) t -> 'a -> unit

fill_empty_slots_with v x puts x in the slots of v's underlying array that are not used (ie in the last capacity v - length v slots). This is useful if you removed some elements from the vector and want to be sure they can be GC'd by erasing them from the vector.

  • since 2.4
val of_klist : ?init:('a, rw) t -> 'a klist -> ('a, rw) t
val to_klist : ('a, _) t -> 'a klist
val of_gen : ?init:('a, rw) t -> 'a gen -> ('a, rw) t
val to_gen : ('a, _) t -> 'a gen
val to_string : ?start:string -> ?stop:string -> ?sep:string -> ('a -> string) -> ('a, _) t -> string

Print the vector in a string

  • since 2.7
val pp : ?start:string -> ?stop:string -> ?sep:string -> 'a printer -> ('a, _) t printer