Collection
protocol Collection : Sequence
-
Mechanica
Returns the first index where the specified value appears in the collection. After using firstIndex(of:) to find the last position of a particular element in a collection, you can use it to access the element by subscripting.
Note
Same asindex(of:)
.See also
index(of:)
Declaration
Swift
public func firstIndex(of element: Element) -> Self.Index?
Parameters
element
Index of the first element found (if any).
-
Mechanica
Returns the last index where the specified value appears in the collection. After using lastIndex(of:) to find the last position of a particular element in a collection, you can use it to access the element by subscripting.
Declaration
Swift
public func lastIndex(of element: Element) -> Self.Index?
Parameters
element
Index of the last element found (if any).
-
Mechanica
Returns a random element from
self
.Declaration
Swift
public func random() -> Element