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# kCFTypeArrayCallBacks

```
let kCFTypeArrayCallBacks: CFArrayCallBacks
```

## Discussion

Predefined [`CFArrayCallBacks`](/documentation/CoreFoundation/CFArrayCallBacks) structure containing a set of callbacks appropriate for use when the values in a CFArray are all CFType-derived objects. The retain callback is `CFRetain`, the release callback is `CFRelease`, the copy callback is `CFCopyDescription`, and the equal callback is `CFEqual`. Therefore, if you use this constant when creating the collection, items are automatically retained when added to the collection, and released when removed from the collection.

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