Nonempty_list (preface.Preface_core.Nonempty

type 'a t =

val create : 'a -> 'a t

create x create a new non-empty list with x.

val from_list : 'a list -> 'a t option

Creates a non-empty list from a regular list.

val to_list : 'a t -> 'a list

Convert non-empty list to a regular list.

val hd : 'a t -> 'a

Returns the head of a non-empty list.

val tl : 'a t -> 'a t option

Returns the tail of a non-empty list.

val length : 'a t -> int

Returns the length of a non-empty list.

val cons : 'a -> 'a t -> 'a t

cons x xs is add x as head of xs.

val append : 'a t -> 'a t -> 'a t

append a b concat a and b.

val rev : 'a t -> 'a t

rev xs reverse xs.

val rev_append : 'a t -> 'a t -> 'a t

rev_append a b is a tail-recursive version of append (rev a) b.

val flatten : 'a t t -> 'a t

Concat a non-empty list of non-empty list

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

List.iter for non-empty list.

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

List.iteri for non-empty list.

val map : ('a -> 'b) -> 'a t -> 'b t

List.map for non-empty list.

val mapi : (int -> 'a -> 'b) -> 'a t -> 'b t

List.mapi for non-empty list.

val reduce : ('a -> 'a -> 'a) -> 'a t -> 'a

reduce f xs reduce all value of xs into one.

val fold_left : ('a -> 'b -> 'a) -> 'a -> 'b t -> 'a

List.fold_left for non-empty list.

val fold_right : ('a -> 'b -> 'b) -> 'a t -> 'b -> 'b

List.fold_right for non-empty list.

val equal : ('a -> 'a -> bool) -> 'a t -> 'a t -> bool

Equality between Nonempty_list.t.

val pp : 
  (Stdlib.Format.formatter -> 'a -> unit) ->
  Stdlib.Format.formatter ->
  'a t ->
  unit

Formatter for pretty-printing for Nonempty_list.t.