# NSCopyHashTableWithZone(_:_:) Performs a shallow copy of the specified hash table. ``` func NSCopyHashTableWithZone(_ table: NSHashTable, _ zone: NSZone?) -> NSHashTable ``` ## Return Value A pointer to a new copy of `table`, created in `zone` and containing pointers to the data elements of `table`. ## Discussion If `zone` is `NULL`, the new table is created in the default zone. The new table adopts the callback functions of `table` and calls the `hash` and `retain` callback functions as appropriate when inserting elements into the new table. ## See Also [`NSCreateHashTableWithZone`](/documentation/Foundation/NSCreateHashTableWithZone(_:_:_:)) Creates a new hash table in a given zone. [`NSCreateHashTable`](/documentation/Foundation/NSCreateHashTable(_:_:)) Creates and returns a new hash table. [`NSHashTableCallBacks`](/documentation/Foundation/NSHashTableCallBacks) Defines a structure that contains the function pointers used to configure behavior of `NSHashTable` with respect to elements within a hash table. --- 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)