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