Returns the index of the given element in the set, or nil if the element is not a member of the set.
SDK
- Xcode 10.0+
Framework
- Swift Standard Library
Instance Methodfirst
first
See Also
Finding Elements
subscript(Set<Element>.Index) -> ElementAccesses the member at the given position.
func contains(where: (Element) -> Bool) -> BoolReturns a Boolean value indicating whether the sequence contains an element that satisfies the given predicate.
func allReturns 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 firstReturns the first index in which an element of the collection satisfies the given predicate.
func index(of: Element) -> Set<Element>.Index?Returns the first index where the specified value appears in the collection.
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.