Null object pattern: Difference between revisions

Revision as of 11:01, 14 January 2022

Revision as of 11:57, 5 June 2022

Line 1:

{{Short description|Object with no referenced value or with defined neutral ("null") behavior}}

{{Redirect|Null object|the concept in category theory|Initial object}}

In [[object-oriented]] [[computer programming]], a '''null object''' is an [[Object (computer science)|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 inas the"Void [[Pattern Languages of Programs#Publications|''Pattern Languages of Program Design'' book series]].Value"<ref>{{Cite bookconference

| first = Thomas

| last = Kühne

| contribution = Void Value

| title = Proceedings of the First International Conference on Object-Oriented Technology, White Object-Oriented Nights 1996 (WOON'96), St. Petersburg, Russia

| year = 1996

}}</ref>

and later in the [[Pattern Languages of Programs#Publications|''Pattern Languages of Program Design'' book series]] as "Null Object" .<ref>{{Cite book

| first = Bobby

| last = Woolf