Batteries user guide : BatVect.RANDOMACCESS

`sig
type 'a t
val empty : 'a BatVect.RANDOMACCESS.t
val get : 'a BatVect.RANDOMACCESS.t -> int -> 'a
val unsafe_get : 'a BatVect.RANDOMACCESS.t -> int -> 'a
val set : 'a BatVect.RANDOMACCESS.t -> int -> 'a -> unit
val unsafe_set : 'a BatVect.RANDOMACCESS.t -> int -> 'a -> unit
val append :
'a BatVect.RANDOMACCESS.t ->
'a BatVect.RANDOMACCESS.t -> 'a BatVect.RANDOMACCESS.t
val concat : 'a BatVect.RANDOMACCESS.t list -> 'a BatVect.RANDOMACCESS.t
val length : 'a BatVect.RANDOMACCESS.t -> int
val copy : 'a BatVect.RANDOMACCESS.t -> 'a BatVect.RANDOMACCESS.t
val sub :
'a BatVect.RANDOMACCESS.t -> int -> int -> 'a BatVect.RANDOMACCESS.t
val make : int -> 'a -> 'a BatVect.RANDOMACCESS.t
val iter : ('a -> unit) -> 'a BatVect.RANDOMACCESS.t -> unit
val map :
('a -> 'b) -> 'a BatVect.RANDOMACCESS.t -> 'b BatVect.RANDOMACCESS.t
val fold_right : ('a -> 'b -> 'b) -> 'a BatVect.RANDOMACCESS.t -> 'b -> 'b
val enum : 'a BatVect.RANDOMACCESS.t -> 'a BatEnum.t
val backwards : 'a BatVect.RANDOMACCESS.t -> 'a BatEnum.t
val of_enum : 'a BatEnum.t -> 'a BatVect.RANDOMACCESS.t
val of_backwards : 'a BatEnum.t -> 'a BatVect.RANDOMACCESS.t
end`