Module List

module List: sig .. end

Extensions to Core.Core_list.

val of_option : 'a option -> 'a list

of_option o returns a list that is empty if o is None, otherwise it is a singleton list. Useful to get filter_map-like behavior in the context of something like a concat_map.

val set_inter : 'a list -> 'a list -> 'a list

set_inter l1 l2 returns a list without duplicates of all elements of l1 that are in l2

val set_diff : 'a list -> 'a list -> 'a list

set_diff l1 l2 returns a list of all elements of l1 that are not in l2

val classify : ?equal:('b -> 'b -> bool) -> f:('a -> 'b) -> 'a list -> ('b * 'a list) list

classify l ~equal ~f elements x and y of list l are assigned to the same class iff equal (f x) (f y) returns true. The default for equal is ( = )

val enumerate_from : int -> 'a list -> ('a * int) list

enumerate_from n xs returns a list of pairs constructed by pairing an incrementing counter, starting at n, with the elements of xs. e.g. enumerate_from 1 a,b,c = a,1; b,2; c,3

val fold_left_term : 'a list ->
       f:('b -> 'a -> [ `Continue of 'b | `Final of 'b ]) -> init:'b -> 'b

fold_left_term is like fold_left, except that you can halt early. The function to be folded should return a bool along with the new accumulator. True indicates that it should continue, false means it should halt

val map_accum : 'a list -> f:('b -> 'a -> 'b * 'c) -> init:'b -> 'b * 'c list

A combination of map and fold. Applies a function to each element of the input list, building up an accumulator, returning both the final state of the accumulator and a new list.

val max : ?cmp:('a -> 'a -> int) -> 'a list -> 'a option

val min : ?cmp:('a -> 'a -> int) -> 'a list -> 'a option

val max_exn : ?cmp:('a -> 'a -> int) -> 'a list -> 'a

val min_exn : ?cmp:('a -> 'a -> int) -> 'a list -> 'a

val lcs : 'a list -> 'a list -> 'a list

Find the longest common subsequence between two list.

Numbers the elements in a list by occurence:

[a;b;c;a;d] -> [(a,0);(b,0);(c,0);(a,1);(d,0)]

val number : 'a list -> ('a * int) list

val multimerge : 'a list list -> 'a list

Merges several list trying to keep the order in which the elements appear. The elements of the individual are not deduped.

multimerge [[a;b;d;a] [b;c;d]] -> [a;b;c;d;a]

val multimerge_unique : 'a list list -> 'a list

val square : ?null:'v -> ('k * 'v) list list -> 'k list * 'v list list

Takes a list of `key*`value lists and returns a header * table_body body that is obtained by splitting the lists and re-oddering the terms (so that they all have the same header).

If null_value is not specified and the rows have different keys the function will raise an exception. square ~null [[(1,a_1);(2,b_1);(4,c_1)]; [(3,a_2)]; [(0,a_3);(1,b_3);(2,c_3);(3,d_3);(4,e_3)]] = ([0 ;1 ;2 ;3 ;4], [[null;a_1 ;b_1 ;null;c_1 ] [null;null;null;a_2 ;null] [a_3 ;b_3 ;c_3 ;d_3 ;e_3 ]])

val square_unique : ?null:'v -> ('k * 'v) list list -> 'k list * 'v list list

val equal : equal:('a -> 'b -> bool) -> 'a list -> 'b list -> bool

val compare : cmp:('a -> 'b -> int) -> 'a list -> 'b list -> int