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- Null_pointer abstract "In computing, a null pointer has a value reserved for indicating that the pointer does not refer to a valid object. Programs routinely use null pointers to represent conditions such as the end of a list of unknown length or the failure to perform some action; this use of null pointers can be compared to nullable types and to the Nothing value in an option type.A null pointer should not be confused with an uninitialized pointer: A null pointer is guaranteed to compare unequal to any pointer that points to a valid object. However, depending on the language and implementation, an uninitialized pointer may not have any such guarantee. It might compare equal to other, valid pointers; or it might compare equal to null pointers. It might do both at different times.Null pointers have different semantics than null values. A null pointer in most programming languages means "no value", while a null value in a relational database means "unknown value". This leads to important differences in practice: most programming languages will treat two null pointers as equal, but a relational database engine does not regard two null values as equal (since they represent unknown values, it is unknown whether they are equal).".
- Null_pointer wikiPageExternalLink n1256.pdf.
- Null_pointer wikiPageExternalLink what-every-c-programmer-should-know.html.
- Null_pointer wikiPageID "1175028".
- Null_pointer wikiPageLength "8283".
- Null_pointer wikiPageOutDegree "18".
- Null_pointer wikiPageRevisionID "674901924".
- Null_pointer wikiPageWikiLink ALGOL_W.
- Null_pointer wikiPageWikiLink Algol_W.
- Null_pointer wikiPageWikiLink C++11.
- Null_pointer wikiPageWikiLink C.A.R._Hoare.
- Null_pointer wikiPageWikiLink Category:Data_types.
- Null_pointer wikiPageWikiLink Category:Nothing.
- Null_pointer wikiPageWikiLink Computing.
- Null_pointer wikiPageWikiLink Lisp_(programming_language).
- Null_pointer wikiPageWikiLink List_(abstract_data_type).
- Null_pointer wikiPageWikiLink List_(computing).
- Null_pointer wikiPageWikiLink Nullable_type.
- Null_pointer wikiPageWikiLink Objective-C.
- Null_pointer wikiPageWikiLink Option_type.
- Null_pointer wikiPageWikiLink Pointer_(computer_programming).
- Null_pointer wikiPageWikiLink Segmentation_fault.
- Null_pointer wikiPageWikiLink Tagged_architecture.
- Null_pointer wikiPageWikiLink Tagged_pointer.
- Null_pointer wikiPageWikiLink Tagged_union.
- Null_pointer wikiPageWikiLink Tony_Hoare.
- Null_pointer wikiPageWikiLinkText "".
- Null_pointer wikiPageWikiLinkText "''null'' or ''void''".
- Null_pointer wikiPageWikiLinkText "NIL".
- Null_pointer wikiPageWikiLinkText "NULL pointers".
- Null_pointer wikiPageWikiLinkText "NULL".
- Null_pointer wikiPageWikiLinkText "Nil".
- Null_pointer wikiPageWikiLinkText "Null pointer".
- Null_pointer wikiPageWikiLinkText "Null pointer#Dereferencing".
- Null_pointer wikiPageWikiLinkText "Null pointers".
- Null_pointer wikiPageWikiLinkText "NullPointerException".
- Null_pointer wikiPageWikiLinkText "Null_pointer".
- Null_pointer wikiPageWikiLinkText "Nulls".
- Null_pointer wikiPageWikiLinkText "null dereferences".
- Null_pointer wikiPageWikiLinkText "null pointer".
- Null_pointer wikiPageWikiLinkText "null reference".
- Null_pointer wikiPageWikiLinkText "null".
- Null_pointer wikiPageWikiLinkText "null-pointer".
- Null_pointer wikiPageWikiLinkText "pointer".
- Null_pointer hasPhotoCollection Null_pointer.
- Null_pointer wikiPageUsesTemplate Template:Citation_needed.
- Null_pointer wikiPageUsesTemplate Template:Cite_book.
- Null_pointer wikiPageUsesTemplate Template:Nulls.
- Null_pointer wikiPageUsesTemplate Template:Quote.
- Null_pointer wikiPageUsesTemplate Template:Reflist.
- Null_pointer wikiPageUsesTemplate Template:Sections.
- Null_pointer subject Category:Data_types.
- Null_pointer subject Category:Nothing.
- Null_pointer comment "In computing, a null pointer has a value reserved for indicating that the pointer does not refer to a valid object.".
- Null_pointer label "Null pointer".
- Null_pointer sameAs m.012wkzmt.
- Null_pointer sameAs Нульовий_покажчик.
- Null_pointer sameAs Q19848926.
- Null_pointer sameAs Q19848926.
- Null_pointer wasDerivedFrom Null_pointer?oldid=674901924.
- Null_pointer isPrimaryTopicOf Null_pointer.