Removes all elements from the collection.
Required. Default implementation provided.
- Xcode 10.0+
- Swift Standard Library
trueto request that the collection avoid releasing its storage. Retaining the collection’s storage can be a useful optimization when you’re planning to grow the collection again. The default value is
Calling this method may invalidate any existing indices for use with this collection.
Complexity: O(n), where n is the length of the collection.