Removes and returns the last element of the collection.
SDK
- Xcode 10.0+
Framework
- Swift Standard Library
Declaration
mutating func popLast() -> Element?
Return Value
The last element of the collection if the collection is not empty; otherwise, nil.
Discussion
Calling this method may invalidate all saved indices of this collection. Do not rely on a previously stored index value after altering a collection with any operation that can change its length.
Complexity: O(1)