Module type Queue.S
include Base.Sexpable.S1 with type 'a t := 'a t
val t_of_sexp : (Base.Sexp.t -> 'a) -> Base.Sexp.t -> 'a t
val sexp_of_t : ('a -> Base.Sexp.t) -> 'a t -> Base.Sexp.t
include Base.Indexed_container.S1 with type 'a t := 'a t
include Base.Container.S1
val mem : 'a t -> 'a -> equal:('a -> 'a -> bool) -> bool
Checks whether the provided element is there, using
equal
.
val length : 'a t -> int
val is_empty : 'a t -> bool
val iter : 'a t -> f:('a -> unit) -> unit
val fold : 'a t -> init:'accum -> f:('accum -> 'a -> 'accum) -> 'accum
fold t ~init ~f
returnsf (... f (f (f init e1) e2) e3 ...) en
, wheree1..en
are the elements oft
val fold_result : 'a t -> init:'accum -> f:('accum -> 'a -> ('accum, 'e) Base.Result.t) -> ('accum, 'e) Base.Result.t
fold_result t ~init ~f
is a short-circuiting version offold
that runs in theResult
monad. Iff
returns anError _
, that value is returned without any additional invocations off
.
val fold_until : 'a t -> init:'accum -> f:('accum -> 'a -> ('accum, 'final) Base__.Container_intf.Continue_or_stop.t) -> finish:('accum -> 'final) -> 'final
fold_until t ~init ~f ~finish
is a short-circuiting version offold
. Iff
returnsStop _
the computation ceases and results in that value. Iff
returnsContinue _
, the fold will proceed. Iff
never returnsStop _
, the final result is computed byfinish
.Example:
type maybe_negative = | Found_negative of int | All_nonnegative of { sum : int } (** [first_neg_or_sum list] returns the first negative number in [list], if any, otherwise returns the sum of the list. *) let first_neg_or_sum = List.fold_until ~init:0 ~f:(fun sum x -> if x < 0 then Stop (Found_negative x) else Continue (sum + x)) ~finish:(fun sum -> All_nonnegative { sum }) ;; let x = first_neg_or_sum [1; 2; 3; 4; 5] val x : maybe_negative = All_nonnegative {sum = 15} let y = first_neg_or_sum [1; 2; -3; 4; 5] val y : maybe_negative = Found_negative -3
val exists : 'a t -> f:('a -> bool) -> bool
Returns
true
if and only if there exists an element for which the provided function evaluates totrue
. This is a short-circuiting operation.
val for_all : 'a t -> f:('a -> bool) -> bool
Returns
true
if and only if the provided function evaluates totrue
for all elements. This is a short-circuiting operation.
val count : 'a t -> f:('a -> bool) -> int
Returns the number of elements for which the provided function evaluates to true.
val sum : (module Base__.Container_intf.Summable with type t = 'sum) -> 'a t -> f:('a -> 'sum) -> 'sum
Returns the sum of
f i
for alli
in the container.
val find : 'a t -> f:('a -> bool) -> 'a option
Returns as an
option
the first element for whichf
evaluates to true.
val find_map : 'a t -> f:('a -> 'b option) -> 'b option
Returns the first evaluation of
f
that returnsSome
, and returnsNone
if there is no such element.
val to_list : 'a t -> 'a list
val to_array : 'a t -> 'a array
val min_elt : 'a t -> compare:('a -> 'a -> int) -> 'a option
Returns a minimum (resp maximum) element from the collection using the provided
compare
function, orNone
if the collection is empty. In case of a tie, the first element encountered while traversing the collection is returned. The implementation usesfold
so it has the same complexity asfold
.
val max_elt : 'a t -> compare:('a -> 'a -> int) -> 'a option
val foldi : ('a t, 'a, _) Base__.Indexed_container_intf.foldi
val iteri : ('a t, 'a) Base__.Indexed_container_intf.iteri
val existsi : 'a t -> f:(int -> 'a -> bool) -> bool
val for_alli : 'a t -> f:(int -> 'a -> bool) -> bool
val counti : 'a t -> f:(int -> 'a -> bool) -> int
val findi : 'a t -> f:(int -> 'a -> bool) -> (int * 'a) option
val find_mapi : 'a t -> f:(int -> 'a -> 'b option) -> 'b option
val singleton : 'a -> 'a t
singleton a
returns a queue with one element.
val of_list : 'a list -> 'a t
of_list list
returns a queuet
with the elements oflist
in the same order as the elements oflist
(i.e. the first element oft
is the first element of the list).
val of_array : 'a array -> 'a t
val init : int -> f:(int -> 'a) -> 'a t
init n ~f
is equivalent toof_list (List.init n ~f)
.
val enqueue : 'a t -> 'a -> unit
enqueue t a
addsa
to the end oft
.
val enqueue_all : 'a t -> 'a list -> unit
enqueue_all t list
adds all elements inlist
tot
in order oflist
.
val dequeue : 'a t -> 'a option
dequeue t
removes and returns the front element oft
, if any.
val dequeue_exn : 'a t -> 'a
val peek : 'a t -> 'a option
peek t
returns but does not remove the front element oft
, if any.
val map : 'a t -> f:('a -> 'b) -> 'b t
val mapi : 'a t -> f:(int -> 'a -> 'b) -> 'b t
val concat_map : 'a t -> f:('a -> 'b list) -> 'b t
Creates a new queue with elements equal to
List.concat_map ~f (to_list t)
.
val concat_mapi : 'a t -> f:(int -> 'a -> 'b list) -> 'b t
val filter_map : 'a t -> f:('a -> 'b option) -> 'b t
filter_map
creates a new queue with elements equal toList.filter_map ~f (to_list t)
.
val filter_mapi : 'a t -> f:(int -> 'a -> 'b option) -> 'b t
val filter : 'a t -> f:('a -> bool) -> 'a t
filter
is likefilter_map
, except withList.filter
.
val filteri : 'a t -> f:(int -> 'a -> bool) -> 'a t
val filter_inplace : 'a t -> f:('a -> bool) -> unit
filter_inplace t ~f
removes all elements oft
that don't satisfyf
. Iff
raises,t
is unchanged. This is inplace in that it modifiest
; however, it uses space linear in the final length oft
.
val filteri_inplace : 'a t -> f:(int -> 'a -> bool) -> unit