# insert(moving:at:) Moves the elements of a fully initialized buffer into this array, starting at the specified position, and leaving the buffer uninitialized. ``` mutating func insert(moving items: UnsafeMutableBufferPointer, at index: Int) ``` ## Parameters `items` A fully initialized buffer whose contents to move into the array. `index` The index at which to move `items`. ## Discussion If the array does not have sufficient capacity to hold all elements, then this reallocates storage to extend its capacity, using a geometric growth rate. > Complexity: O(`self.count` + `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)