Instance Property

count

The number of elements in the collection.

Declaration

var count: String.CharacterView.IndexDistance { get }

Discussion

To check whether a collection is empty, use its isEmpty property instead of comparing count to zero. Unless the collection guarantees random-access performance, calculating count can be an O(n) operation.

Complexity: O(1) if the collection conforms to RandomAccessCollection; otherwise, O(n), where n is the length of the collection.

See Also

Inspecting a String

var isEmpty: Bool

A Boolean value indicating whether the collection is empty.