# xpc_array_set_uuid(_:_:_:) Inserts a UUID primitive value into an array. ``` func xpc_array_set_uuid(_ xarray: xpc_object_t, _ index: Int, _ uuid: UnsafePointer) ``` ## Parameters `xarray` The array object which is to be manipulated. `index` The index at which to insert the value. This value must lie within the index space of the array (0 to N-1 inclusive, where N is the count of the array) or be [`XPC_ARRAY_APPEND`](/documentation/XPC/XPC_ARRAY_APPEND-swift.var). If the index is outside that range, the behavior is undefined. `uuid` The UUID primitive to insert. After calling this method, the XPC object corresponding to the primitive value inserted may be safely retrieved with [`xpc_array_get_value(_:_:)`](/documentation/XPC/xpc_array_get_value(_:_:)). ## Discussion --- 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)