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Unique identifier. A unique identifier ( UID) is an identifier that is guaranteed to be unique among all identifiers used for those objects and for a specific purpose. [1] The concept was formalized early in the development of computer science and information systems. In general, it was associated with an atomic data type .
A namespace is a system of organizing names or identifiers to avoid ambiguity and confusion. In computer science, namespaces are used to group related entities, such as variables, functions, classes, or modules, under a common name. This article explains the concept and history of namespaces, as well as their applications and implementations in different programming languages and environments.
Universally unique identifier. A Universally Unique Identifier ( UUID) is a 128-bit label used for information in computer systems. The term Globally Unique Identifier ( GUID) is also used, mostly in Microsoft systems. [1] [2] When generated according to the standard methods, UUIDs are, for practical purposes, unique.
Uniform Resource Identifier. A Uniform Resource Identifier ( URI ), formerly Universal Resource Identifier, is a unique sequence of characters that identifies an abstract or physical resource, [1] such as resources on a webpage, mail address, phone number, [2] books, real-world objects such as people and places, concepts. [3]
Even though its name is unique, g() is still mangled: name mangling applies to all C++ symbols (except for those in an extern "C" {} block). Complex example. The mangled symbols in this example, in the comments below the respective identifier name, are those produced by the GNU GCC 3.x compilers, according to the IA-64 (Itanium) ABI:
In computer programming, a magic number is any of the following: A unique value with unexplained meaning or multiple occurrences which could (preferably) be replaced with a named constant. A constant numerical or text value used to identify a file format or protocol; for files, see List of file signatures.
Naming convention (programming) In computer programming, a naming convention is a set of rules for choosing the character sequence to be used for identifiers which denote variables, types, functions, and other entities in source code and documentation . Reasons for using a naming convention (as opposed to allowing programmers to choose any ...
Identifier (computer languages) In computer programming languages, an identifier is a lexical token (also called a symbol, but not to be confused with the symbol primitive data type) that names the language's entities. Some of the kinds of entities an identifier might denote include variables, data types, labels, subroutines, and modules .