godot-website/collections/_release_4_5/entry-general-core-duplicate-at-ease-with-expected-results.md

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entry	general	core	2	3	duplicate-at-ease-with-expected-results	Duplicate at ease with expected results	As deep as you wish	For a long time, even though [``@[Resource](enginetype)@[.](symbol)@[duplicate](membervariable)@[()](symbol)``](https://docs.godotengine.org/en/4.5/classes/class_resource.html#class-resource-method-duplicate) has a ``@[deep](membervariable)`` parameter, people realized that setting it to ``@[true](basetype)`` doesn’t always perform in a reliable and predictable way. [Notably](https://github.com/godotengine/godot/issues/74918), it does not duplicate subresources stored inside ``@[Array](basetype)`` or ``@[Dictionary](basetype)`` properties. The same thing happens with [``@[Array](basetype)@[.](symbol)@[duplicate](membervariable)@[()](symbol)``](https://docs.godotengine.org/en/4.5/classes/class_array.html#class-array-method-duplicate) and [``@[Dictionary](basetype)@[.](symbol)@[duplicate](membervariable)@[()](symbol)``](https://docs.godotengine.org/en/4.5/classes/class_dictionary.html#class-dictionary-method-duplicate). The new ``@[duplicate_deep](function)@[()](symbol)`` methods for these classes now give users full control over what gets duplicated or not. This new feature is the result of an overhaul of the duplication logic for arrays, dictionaries, and resources. For developers, we made sure to keep what was working and consistent intact. If you need more details, feel free to consult our new exhaustive documentation about the duplication specification.[^duplicate-at-ease-with-expected-results] [^duplicate-at-ease-with-expected-results]: See the [``@[Array](basetype)``](https://docs.godotengine.org/en/4.5/classes/class_array.html#class-array-method-duplicate), [``@[Dictionary](basetype)``](https://docs.godotengine.org/en/4.5/classes/class_dictionary.html#class-dictionary-method-duplicate), and [``@[Resource](enginetype)``](https://docs.godotengine.org/en/4.5/classes/class_resource.html#class-resource-method-duplicate) API documentation.	name github Pedro J. Estébanez RandomShaper	https://github.com/godotengine/godot/pull/100673