containers

A modular, clean and powerful extension of the OCaml standard library
IN THIS PACKAGE
Module type CCHeap . S
type elt
type t
val empty : t

empty returns the empty heap.

val is_empty : t -> bool

is_empty h returns true if the heap h is empty.

exception Empty
val merge : t -> t -> t

merge h1 h2 merges the two heaps h1 and h2.

val insert : elt -> t -> t

insert x h inserts an element x into the heap h.

val add : t -> elt -> t

add h x inserts an element x into the heap h.

val filter : ( elt -> bool ) -> t -> t

filter p h filters values, only retaining the ones that satisfy the predicate p. Linear time at least.

val find_min : t -> elt option

find_min h find the minimal element of the heap h.

val find_min_exn : t -> elt

find_min_exn h is like find_min but can fail.

  • raises Empty

    if the heap is empty.

val take : t -> (t * elt) option

take h extracts and returns the minimum element, and the new heap (without this element), or None if the heap h is empty.

val take_exn : t -> t * elt

take_exn h is like take, but can fail.

  • raises Empty

    if the heap is empty.

val delete_one : ( elt -> elt -> bool ) -> elt -> t -> t

delete_one eq x h uses eq to find one occurrence of a value x if it exist in the heap h, and delete it. If h do not contain x then it return h.

  • since 2.0
val delete_all : ( elt -> elt -> bool ) -> elt -> t -> t

delete_all eq x h uses eq to find all x in h and delete them. If h do not contain x then it return h. The difference with filter is that delete_all stops as soon as it enters a subtree whose root is bigger than the element.

  • since 2.0
val iter : ( elt -> unit ) -> t -> unit

iter f h iterates over the heap h invoking f with the current element.

val fold : ( 'a -> elt -> 'a ) -> 'a -> t -> 'a

fold f acc h folds on all values of h.

val size : t -> int

size h is the number of elements in the heap h. Linear complexity.

Conversions

val to_list : t -> elt list

to_list h returns the elements of the heap h, in no particular order.

val to_list_sorted : t -> elt list

to_list_sorted h returns the elements of the heap h in increasing order.

  • since 1.1
val add_list : t -> elt list -> t

add_list h l adds the elements of the list l into the heap h. An element occurring several times will be added that many times to the heap.

  • since 0.16
val of_list : elt list -> t

of_list l is add_list empty l. Complexity: O(n log n).

val add_iter : t -> elt iter -> t

add_iter h iter is like add_list.

  • since 2.8
val add_seq : t -> elt Seq.t -> t

add_seq h seq is like add_list. Renamed from add_std_seq since 3.0.

  • since 3.0
val of_iter : elt iter -> t

of_iter iter builds a heap from a given iter. Complexity: O(n log n).

  • since 2.8
val of_seq : elt Seq.t -> t

of_seq seq builds a heap from a given Seq.t. Complexity: O(n log n). Renamed from of_seq since 3.0.

  • since 3.0
val to_iter : t -> elt iter

to_iter h returns a iter of the elements of the heap h.

  • since 2.8
val to_seq : t -> elt Seq.t

to_seq h returns a Seq.t of the elements of the heap h. Renamed from to_std_seq since 3.0.

  • since 3.0
val to_iter_sorted : t -> elt iter

to_iter_sorted h returns a iter by iterating on the elements of h, in increasing order.

  • since 2.8
val to_seq_sorted : t -> elt Seq.t

to_seq_sorted h returns a Seq.t by iterating on the elements of h, in increasing order. Renamed from to_std_seq_sorted since 3.0.

  • since 3.0
val add_gen : t -> elt gen -> t

add_gen h gen adds the gen gen to the heap h.

  • since 0.16
val of_gen : elt gen -> t

of_gen gen builds a heap from a given gen. Complexity: O(n log n).

val to_gen : t -> elt gen

to_gen h returns a gen of the elements of the heap h.

val to_tree : t -> elt ktree

to_tree h returns a ktree of the elements of the heap h.

val to_string : ?sep:string -> ( elt -> string ) -> t -> string

to_string ?sep f h prints the heap h in a string using sep as a given separator (default ",") between each element (converted to a string using f).

  • since 2.7
val pp : ?pp_start:unit printer -> ?pp_stop:unit printer -> ?pp_sep:unit printer -> elt printer -> t printer

pp ?pp_start ?pp_stop ?pp_sep ppf h prints h on ppf. Each element is formatted with ppf, pp_start is called at the beginning, pp_stop is called at the end, pp_sep is called between each elements. By defaults pp_start and pp_stop does nothing and pp_sep defaults to (fun out -> Format.fprintf out ",@ "). Renamed from print since 2.0

  • since 0.16