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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 which 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.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 wikiPageRevisionID "585316310".
- Union_type hasPhotoCollection Union_type.
- Union_type subject Category:C_programming_language.
- Union_type subject Category:Composite_data_types.
- Union_type subject Category:Data_types.
- 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 which 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 "Unia (programowanie)".
- Union_type label "Union (programación)".
- Union_type label "Union type".
- Union_type label "Объединение (структура данных)".
- Union_type label "共用体".
- Union_type label "联合体".
- Union_type sameAs Union_(programación).
- Union_type sameAs 共用体.
- Union_type sameAs Unia_(programowanie).
- Union_type sameAs m.02gzn3.
- Union_type sameAs Q893290.
- Union_type sameAs Q893290.
- Union_type wasDerivedFrom Union_type?oldid=585316310.
- Union_type isPrimaryTopicOf Union_type.