Module Lists

module Lists: sig .. end

Useful list combinators


val rev_map_fold_left : ('acc -> 'a -> 'acc * 'b) -> 'acc -> 'a list -> 'acc * 'b list
val map_fold_left : ('acc -> 'a -> 'acc * 'b) -> 'acc -> 'a list -> 'acc * 'b list
val map_fold_right : ('a -> 'acc -> 'b * 'acc) -> 'a list -> 'acc -> 'b list * 'acc
val equal : ('a -> 'b -> bool) -> 'a list -> 'b list -> bool
val compare : ('a -> 'a -> int) -> 'a list -> 'a list -> int
val cons : ('a -> 'b) -> 'b list -> 'a -> 'b list
val map_join_left : ('a -> 'b) -> ('b -> 'b -> 'b) -> 'a list -> 'b
val apply : ('a -> 'b list) -> 'a list -> 'b list

apply f [a1;..;an] returns (f a1)@...@(f an)

val fold_product : ('a -> 'b -> 'c -> 'a) -> 'a -> 'b list -> 'c list -> 'a

fold_product f acc l1 l2 apply the function f with the accumulator acc on all the pair of elements of l1 and l2 tail-recursive

val fold_product_l : ('a -> 'b list -> 'a) -> 'a -> 'b list list -> 'a

generalisation of Lists.fold_product; not tail-recursive

val flatten_rev : 'a list list -> 'a list
val part : ('a -> 'a -> int) -> 'a list -> 'a list list

part cmp l returns the list of the congruence classes with respect to cmp. They are returned in reverse order

val first : ('a -> 'b option) -> 'a list -> 'b

first f l returns the first result of the application of f to an element of l which doesn't return None. raise Not_found if all the element of l return None

val find_nth : ('a -> bool) -> 'a list -> int

find_nth p l returns the index of the first element that satifies the predicate p. raise Not_found if no element of l verify the predicate

val first_nth : ('a -> 'b option) -> 'a list -> int * 'b

The combinaison of list_first and list_find_nth.

val mapi : (int -> 'a -> 'b) -> 'a list -> 'b list
val iteri : (int -> 'a -> unit) -> 'a list -> unit
val fold_lefti : ('a -> int -> 'b -> 'a) -> 'a -> 'b list -> 'a

similar to List.map, List.iter and List.fold_left, but with element index passed as extra argument (in 0..len-1)

val prefix : int -> 'a list -> 'a list

the first n elements of a list

val chop : int -> 'a list -> 'a list

removes the first n elements of a list; raises Invalid_argument if the list is not long enough

val chop_last : 'a list -> 'a list * 'a

removes (and returns) the last element of a list