Instance Property

count

Returns the number of elements.

Declaration

var count: Int { get }
Available when Base conforms to Collection.

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 Self conforms to RandomAccessCollection; O(n) otherwise.

Relationships

From Protocol