A value less than or equal to the number of elements in the collection.
SDKs
- iOS 7.0+
- macOS 10.9+
- Mac Catalyst 13.0+
- tvOS 9.0+
- watchOS 2.0+
- Xcode 10.0+
Framework
- Foundation
Declaration
var underestimatedCount: Int { get }
Discussion
Complexity: O(1) if the collection conforms to Random; otherwise, O(n), where n is the length of the collection.