Prototype of a callback function used to release a key-value pair before it’s removed from a dictionary.
- iOS 2.0+
- macOS 10.0+
- UIKit for Mac 13.0+Beta
- tvOS 9.0+
- watchOS 2.0+
The dictionary’s allocator.
The value being removed from the dictionary.
Prototype of a callback function invoked to compute a hash code for a key. Hash codes are used when key-value pairs are accessed, added, or removed from a collection.
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