Null object pattern: Difference between revisions

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It can be regarded as a special case of the [[State pattern]] and the [[Strategy pattern]].
 
It is not a pattern from ''[[Design Patterns (book)|Design Patterns]]'', but is mentioned in [[Martin Fowler (software engineer)|Martin Fowler's]] ''Refactoring''<ref>{{cite book
| first = Martin
| last = Fowler