man sets () - Functions for Set Manipulation

NAME

sets - Functions for Set Manipulation

DESCRIPTION

Sets are collections of elements with no duplicate elements. The representation of a set is not defined.

EXPORTS

new() -> Set

Types
Set = set()

Returns a new empty ordered set.

is_set(Set) -> bool()

Types
Set = term()

Returns true if Set is an ordered set of elements, otherwise false.

size(Set) -> int()

Types
Set = term()

Returns the number of elements in Set.

to_list(Set) -> List

Types
Set = set()

List = [term()]

Returns the elements of Set as a list.

from_list(List) -> Set

Types
List = [term()]

Set = set()

Returns an ordered set of the elements in List.

is_element(Element, Set) -> bool()

Types
Element = term()

Set = set()

Returns true if Element is an element of Set, otherwise false.

add_element(Element, Set1) -> Set2

Types
Element = term()

Set1 = Set2 = set()

Returns a new ordered set formed from Set1 with Element inserted.

del_element(Element, Set1) -> Set2

Types
Element = term()

Set1 = Set2 = set()

Returns Set1, but with Element removed.

union(Set1, Set2) -> Set3

Types
Set1 = Set2 = Set3 = set()

Returns the merged (union) set of Set1 and Set2.

union(SetList) -> Set

Types
SetList = [set()]

Set = set()

Returns the merged (union) set of the list of sets.

intersection(Set1, Set2) -> Set3

Types
Set1 = Set2 = Set3 = set()

Returns the intersection of Set1 and Set2.

intersection(SetList) -> Set

Types
SetList = [set()]

Set = set()

Returns the intersection of the non-empty list of sets.

subtract(Set1, Set2) -> Set3

Types
Set1 = Set2 = Set3 = set()

Returns only the elements of Set1 which are not also elements of Set2.

is_subset(Set1, Set2) -> bool()

Types
Set1 = Set2 = set()

Returns true when every element of Set1 is also a member of Set2, otherwise false.

fold(Function, Acc0, Set) -> Acc1

Types
Function = fun (E, AccIn) -> AccOut

Acc0 = Acc1 = AccIn = AccOut = term()

Set = set()

Fold Function over every element in Set returning the final value of the accumulator.

filter(Pred, Set1) -> Set2

Types
Pred = fun (E) -> bool()

Set1 = Set2 = set()

Filter elements in Set1 with boolean function Fun.

See Also

AUTHOR

Robert Virding - support@erlang.ericsson.se