Returns the first index where the specified value appears in the collection.
SDK
- Xcode 10.2–10.2Deprecated
Framework
- Swift Standard Library
Declaration
func index(of element: Element) -> Int?
Available when Element conforms to Equatable.
Instance Method
index(of:)
See Also
Finding Elements
func contains(Element) -> BoolReturns a Boolean value indicating whether the sequence contains the given element.
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 where the specified value appears in the collection.
func firstReturns the first index in which an element of the collection satisfies the given predicate.
func last(where: (Element) -> Bool) -> Element?Returns the last element of the sequence that satisfies the given predicate.
func lastReturns the last index where the specified value appears in the collection.
func lastReturns the index of the last element in the collection that matches the given predicate.
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.