# replaceAll(_:) Replaces all entities in this collection with those from the given sequence. ``` mutating func replaceAll(_ entities: S) where S : Sequence, S.Element : Entity ``` ## Parameters `entities` The sequence of entities that will replace the collection’s current contents. ## Discussion> Note: This operation might not maintain the new entities’ index order. --- 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)