# append(contentsOf:) ``` @abi(func append(fastContentsof elements: some Sequence)) mutating func append(contentsOf elements: some Sequence) ``` --- 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)