Instance Method

firstIndex(of:)

Returns the index of the given element in the set, or nil if the element is not a member of the set.

Declaration

func firstIndex(of member: Element) -> Set<Element>.Index?

Parameters

member

An element to search for in the set.

Return Value

The index of member if it exists in the set; otherwise, nil.

Discussion

Complexity: O(1)

See Also

Finding Elements

subscript(Set<Element>.Index) -> Element

Accesses the member at the given position.

func contains(where: (Element) -> Bool) -> Bool

Returns a Boolean value indicating whether the sequence contains an element that satisfies the given predicate.

func allSatisfy((Element) -> Bool) -> Bool

Returns a Boolean value indicating whether every element of a sequence satisfies a given predicate.

func first(where: (Element) -> Bool) -> Element?

Returns the first element of the sequence that satisfies the given predicate.

func firstIndex(where: (Element) -> Bool) -> Index?

Returns the first index in which an element of the collection satisfies the given predicate.

func index(of: Element) -> Index?

Returns the first index where the specified value appears in the collection.

Deprecated
func min() -> Element?

Returns the minimum element in the sequence.

func min(by: (Element, Element) -> Bool) -> Element?

Returns the minimum element in the sequence, using the given predicate as the comparison between elements.

func max() -> Element?

Returns the maximum element in the sequence.

func max(by: (Element, Element) -> Bool) -> Element?

Returns the maximum element in the sequence, using the given predicate as the comparison between elements.