# append(moving:) Moves the elements of a output span to the end of this array, leaving the span empty. ``` mutating func append(moving items: inout OutputSpan) ``` ## Parameters `items` An output span whose contents need to be appended to this array. ## Discussion If the array does not have sufficient capacity to hold all new items, then this reallocates the array’s storage to grow its capacity, using a geometric growth rate. > Complexity: O(`items.count`) --- Copyright © 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)