Null object pattern - Wikipedia
"Null object" redirects here. For the concept in category theory, see Initial object. In object-oriented computer programming, a null object is an object with no referenced value or with defined neutral (null) behavior. The null object design pattern, which describes the uses of such objects and their behavior (or lack thereof), was first published as "Void Value"[1] and later in the Pattern Langu
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The Null Struct Pattern
