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- Union_type abstract "In computer science, a union is a value that may have any of several representations or formats; or it is a data structure that consists of a variable that may hold such a value. Some programming languages support special data types, called union types, to describe such values and variables. In other words, a union type definition will specify which of a number of permitted primitive types may be stored in its instances, e.g., \"float or long integer\". Contrast with a record (or structure), which could be defined to contain a float and an integer; in a union, there is only one value at any given time.A union can be pictured as a chunk of memory that is used to store variables of different data types. Once a new value is assigned to a field, the existing data is overwritten with the new data. The memory area storing the value has no intrinsic type (other than just bytes or words of memory), but the value can be treated as one of several abstract data types, having the type of the value that was last written to the memory area.In type theory, a union has a sum type; this corresponds to disjoint union in mathematics.Depending on the language and type, a union value may be used in some operations, such as assignment and comparison for equality, without knowing its specific type. Other operations may require that knowledge, either by some external information, or by the use of a tagged union.".
- Union_type wikiPageExternalLink c-difference-between-struct-and-union.
- Union_type wikiPageExternalLink variant.html.
- Union_type wikiPageExternalLink 4a1hcx0y(v=VS.80).aspx.
- Union_type wikiPageExternalLink 346541.
- Union_type wikiPageID "492281".
- Union_type wikiPageLength "11898".
- Union_type wikiPageOutDegree "34".
- Union_type wikiPageRevisionID "699132325".
- Union_type wikiPageWikiLink Assignment_(computer_science).
- Union_type wikiPageWikiLink Byte.
- Union_type wikiPageWikiLink C++.
- Union_type wikiPageWikiLink C++11.
- Union_type wikiPageWikiLink C++_string_handling.
- Union_type wikiPageWikiLink C11_(C_standard_revision).
- Union_type wikiPageWikiLink COBOL.
- Union_type wikiPageWikiLink C_(programming_language).
- Union_type wikiPageWikiLink Category:C_(programming_language).
- Union_type wikiPageWikiLink Category:Composite_data_types.
- Union_type wikiPageWikiLink Category:Data_types.
- Union_type wikiPageWikiLink Computer_science.
- Union_type wikiPageWikiLink Data_structure.
- Union_type wikiPageWikiLink Data_type.
- Union_type wikiPageWikiLink Disjoint_union.
- Union_type wikiPageWikiLink GNU_Compiler_Collection.
- Union_type wikiPageWikiLink Methods_of_computing_square_roots.
- Union_type wikiPageWikiLink Object_(computer_science).
- Union_type wikiPageWikiLink Polymorphism_(computer_science).
- Union_type wikiPageWikiLink Programming_language.
- Union_type wikiPageWikiLink Record_(computer_science).
- Union_type wikiPageWikiLink Set_(mathematics).
- Union_type wikiPageWikiLink Set_operations_(SQL).
- Union_type wikiPageWikiLink Struct_(C_programming_language).
- Union_type wikiPageWikiLink Tagged_union.
- Union_type wikiPageWikiLink Type_conversion.
- Union_type wikiPageWikiLink Type_theory.
- Union_type wikiPageWikiLink Union_(set_theory).
- Union_type wikiPageWikiLink Value_(computer_science).
- Union_type wikiPageWikiLink Variable_(computer_science).
- Union_type wikiPageWikiLink Word_(computer_architecture).
- Union_type wikiPageWikiLinkText "Union type".
- Union_type wikiPageWikiLinkText "union type".
- Union_type wikiPageWikiLinkText "union".
- Union_type wikiPageWikiLinkText "unions".
- Union_type wikiPageWikiLinkText "untagged unions".
- Union_type wikiPageUsesTemplate Template:Data_structures.
- Union_type wikiPageUsesTemplate Template:Data_types.
- Union_type wikiPageUsesTemplate Template:Quote.
- Union_type wikiPageUsesTemplate Template:Unreferenced.
- Union_type subject Category:C_(programming_language).
- Union_type subject Category:Composite_data_types.
- Union_type subject Category:Data_types.
- Union_type hypernym Value.
- Union_type type Company.
- Union_type type Type.
- Union_type type Structure.
- Union_type type Type.
- Union_type comment "In computer science, a union is a value that may have any of several representations or formats; or it is a data structure that consists of a variable that may hold such a value. Some programming languages support special data types, called union types, to describe such values and variables. In other words, a union type definition will specify which of a number of permitted primitive types may be stored in its instances, e.g., \"float or long integer\".".
- Union_type label "Union type".
- Union_type sameAs Q893290.
- Union_type sameAs Unión_de_datos.
- Union_type sameAs 共用体.
- Union_type sameAs Unia_(programowanie).
- Union_type sameAs m.02gzn3.
- Union_type sameAs Объединение_(структура_данных).
- Union_type sameAs Q893290.
- Union_type sameAs 联合体.
- Union_type wasDerivedFrom Union_type?oldid=699132325.
- Union_type isPrimaryTopicOf Union_type.