ConcatenationIn formal language theory and computer programming, concatenation is the operation of joining sequential objects, such as character strings, files, lists or pieces of audio or video, end-to-end. For example, the concatenation of "snow" and "ball" is "snowball". In certain formalizations of concatenation theory, also called string theory, string concatenation is a primitive notion.
Regular expressionA regular expression (shortened as regex or regexp), sometimes referred to as a rational expression, is a sequence of characters that specifies a match pattern in text. Usually such patterns are used by string-searching algorithms for "find" or "find and replace" operations on strings, or for input validation. Regular expression techniques are developed in theoretical computer science and formal language theory.
String (computer science)In computer programming, a string is traditionally a sequence of characters, either as a literal constant or as some kind of variable. The latter may allow its elements to be mutated and the length changed, or it may be fixed (after creation). A string is often implemented as an array data structure of bytes (or words) that stores a sequence of elements, typically characters, using some character encoding.
GuillemetGuillemets are a pair of punctuation marks in the form of sideways double chevrons, « and », sometimes used as quotation marks or ditto marks. When used as quotation marks, single guillemets, ‹ and ›, are used for nested quotations. Guillemets are not conventionally used in English. TerminologyGuillemets are also called French quotes, French quotation marks, angle quotation marks, or duckfoot quotes.String literalA string literal or anonymous string is a literal for a string value in source code. Commonly, a programming language includes a string literal code construct that is a series of characters enclosed in bracket delimiters – usually quote marks. In many languages, the text "foo" is a string literal that encodes the text foo but there are many other variations.
C (programming language)General-purpose programming languageC is a general-purpose programming language created in 1972 by Dennis Ritchie. By design, C gives programmers relatively direct access to the features of typical CPU architectures, customized for the target instruction set. It has been and continues to be used to implement operating systems (especially kernels), device drivers, and protocol stacks, though its use in application software is decreasing.
Open-source softwareSoftware with publicly available source codeA screenshot of Debian Linux running the Cinnamon desktop environment, featuring Firefox (accessing Wikipedia which uses MediaWiki), LibreOffice Writer, Vim, VLC and Nemo file manager, all of which are open-source softwareOpen-source software (OSS) is computer software whose source code is publicly available, allowing users to use, study, modify, and distribute it — in contrast with proprietary (closed-source) software.
Programming languageA programming language is an engineered language for expressing computer programs, typically allowing software to be written in a human readable manner. Execution of a program requires an implementation. There are two main approaches for implementing a programming language – compilation, where programs are translated ahead-of-time to machine code, and interpretation, where programs are directly executed.
Java (programming language)Object-oriented programming languageJava is a high-level, general-purpose, memory-safe, object-orientedprogramming language. It is intended to let programmerswrite once, run anywhere (WORA), meaning that compiled Java code can run on all platforms that support Java without the need to recompile. Java applications are usually compiled to bytecode that can run on any Java virtual machine (JVM) regardless of the underlying computer architecture.
C Sharp (programming language)C# ( see SHARP) is a general-purpose high-level programming language supporting multiple paradigms. C# encompasses static typing, strong typing, lexically scoped, imperative, declarative, functional, generic, object-oriented (class-based), and component-oriented programming disciplines. The principal designers of the C# programming language were Anders Hejlsberg, Scott Wiltamuth, and Peter Golde from Microsoft.
Function (computer programming)In computer programming, a function (also procedure, method, subroutine, routine, or subprogram) is a callable unit of software logic that has a well-formed interface and behavior and can be invoked multiple times. Callable units provide a powerful programming tool. The primary purpose is to enable the decomposition of a large and/or complicated problem into chunks that have relatively low cognitive load.
Data typeIn computer science and computer programming, a data type (or simply type) is a collection or grouping of data values, usually specified by a set of possible values, a set of allowed operations on these values, and/or a representation of these values as machine types. A data type specification in a program constrains the possible values that an expression, such as a variable or a function call, might take.*As an Amazon Associate I earn from qualifying purchases.