66 lines
2.4 KiB
OCaml
66 lines
2.4 KiB
OCaml
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(**************************************************************************)
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(* *)
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(* Copyright (c) 2014 - 2017. *)
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(* Dynamic Ledger Solutions, Inc. <contact@tezos.com> *)
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(* *)
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(* All rights reserved. No warranty, explicit or implicit, provided. *)
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(* *)
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(**************************************************************************)
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(** [remove nb list] remove the first [nb] elements from the list [list]. *)
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val remove: int -> 'a list -> 'a list
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(** [repeat n x] is a list of [n] [x]'s **)
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val repeat: int -> 'a -> 'a list
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(** [take_n n l] returns the [n] first elements of [l]. When [compare]
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is provided, it returns the [n] greatest element of [l]. *)
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val take_n: ?compare:('a -> 'a -> int) -> int -> 'a list -> 'a list
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(** Bounded sequence: keep only the [n] greatest elements. *)
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module Bounded(E: Set.OrderedType) : sig
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type t
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val create: int -> t
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val insert: E.t -> t -> unit
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val get: t -> E.t list
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end
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(** [select n l] is ([n]th element of [l], [l] without that element) **)
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val select: int -> 'a list -> 'a * 'a list
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(** [filter_map f l] is [[y for x in l where (f x) = Some y]] **)
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val filter_map: ('a -> 'b option) -> 'a list -> 'b list
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(** [rev_sub l n] is [List.rev l] capped to max [n] elements *)
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val rev_sub : 'a list -> int -> 'a list
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(** [sub l n] is [l] capped to max [n] elements *)
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val sub: 'a list -> int -> 'a list
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(** Like [List.hd], but [Some hd] or [None] if empty **)
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val hd_opt: 'a list -> 'a option
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(** Last elt of list, or raise Not_found if empty **)
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val last_exn: 'a list -> 'a
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(** [merge_filter2 ~compare ~f l1 l2] merges two lists ordered by [compare]
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and whose items can be merged with [f]. Item is discarded or kept whether
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[f] returns [Some] or [None] *)
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val merge_filter2 :
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?finalize:('a list -> 'a list) ->
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?compare:('a -> 'a -> int) ->
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?f:('a option -> 'a option -> 'a option) ->
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'a list -> 'a list ->
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'a list
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(** [merge2 ~compare ~f l1 l2] merges two lists ordered by [compare] and
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whose items can be merged with [f] *)
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val merge2 :
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?finalize:('a list -> 'a list) ->
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?compare:('a -> 'a -> int) ->
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?f:('a -> 'a -> 'a) ->
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'a list -> 'a list ->
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'a list
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