Null object pattern: Difference between revisions

Revision as of 23:27, 22 May 2023

Revision as of 23:58, 16 June 2023

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== Description ==

{{Unreferenced section|date=June 2023}}

Instead of using a [[null reference]] to convey absence of an object (for instance, a non-existent customer), one uses an object which implements the expected [[Interface_(computing)#In_object-oriented_languages | interface]], but whose method body is empty. The advantage of this approach over a working default implementation is that a null object is very predictable and has no side effects: it does ''nothing''.