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Refactoring is the process of rewriting a computer program or other material to improve its structure or readability, while explicitly keeping its meaning or behavior. Rewriting in mathematics, computer science and logic covers a wide range of non-deterministic methods of replacing subterms of a formula with other terms. ...
Readability is a measure of the accessibility of a piece of writing. ...
The introduction to this article provides insufficient context for those unfamiliar with the subject matter. ...
Behavior (or behaviour in Commonwealth English) refers to the actions or reactions of an object or organism, usually in relation to the environment. ...
Refactoring code
In software engineering, the term refactoring means modifying source code without changing its external behavior, and is sometimes informally referred to as "cleaning it up". In extreme programming and other agile methodologies refactoring is an integral part of the software development cycle: developers alternate between adding new tests and functionality and refactoring the code to improve its internal consistency and clarity. Automated unit testing ensures that refactoring does not make the code stop working. Software engineering (SE) is the practice of creating and maintaining software applications by applying technologies and practices from computer science, project management, engineering, application domains and other fields. ...
Source code (commonly just source or code) is any series of statements written in some human-readable computer programming language. ...
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Agile software development is a conceptual framework for undertaking software engineering projects. ...
It has been suggested that this article or section be merged into Software development process. ...
baba salisu home work Software testing is the process used to help identify the correctness, completeness, security and quality of developed computer software. ...
Refactoring does not fix bugs or add new functionality. Rather it is designed to improve the understandability of the code or change its structure and design, and remove dead code, to make it easier for human maintenance in the future. In particular, adding new behavior to a program might be difficult with the program's given structure, so a developer might refactor it first to make it easy, and then add the new behavior. A computer bug is an error, flaw, mistake, failure, or fault in a computer program that prevents it from working as intended, or produces an incorrect result. ...
Look up Function in Wiktionary, the free dictionary The word function may mean: In common parlance, a role of a component in an assembly, or of an element in a systemic aggregate (such as a person within a group). ...
Readability is a measure of the comprehensibility or understandability of written text. ...
The structure of a thing is how the parts of it relate to each other, how it is put together. This contrast with process, which is how the thing works; but process requires a viable structure. ...
Usually considered in the context of the applied arts, engineering, architecture, and other such creative endeavours, design is used as both a noun and a verb. ...
In computer programming, dead code typically consists of blocks of programming instructions or entire routines that will never be accessed because all calls to them have been removed, or code that cannot be reached because it is guarded by a control structure that must always transfer control somewhere else. ...
An example of a trivial refactoring is to change a variable name into something more meaningful, such as from a single letter 'i' to 'interestRate'. A more complex refactoring is to turn the code within an if block into a subroutine. An even more complex refactoring is to replace an if conditional with polymorphism. While "cleaning up" code has happened for decades, the key insight in refactoring is to intentionally "clean up" code separately from adding new functionality, using a known catalogue of common useful refactoring methods, and then separately testing the code (knowing that any behavioral changes indicate a bug). The new aspect is explicitly wanting to improve an existing design without altering its intent or behavior. In computer science, a subroutine (function, procedure, or subprogram) is a sequence of code which performs a specific task, as part of a larger program, and is grouped as one or more statement blocks; such code is sometimes collected into software libraries. ...
The term conditional is used in linguistics and logic to refer to related concepts about sentences of the form If X, then Y (ie. ...
In computer science, polymorphism means allowing a single definition to be used with different types of data (specifically, different classes of objects). ...
The term is by analogy with the factorization of numbers and polynomials. For example, x2 − 1 can be factored as (x + 1)(x − 1), revealing an internal structure that was previously not visible (such as the two roots at −1 and +1). Similarly, in software refactoring, the change in visible structure can often reveal the "hidden" internal structure of the original code. In mathematics, factorization or factoring is the decomposition of an object (for example, a number, a polynomial, or a matrix) into a product of other objects, or factors, which when multiplied together give the original. ...
Number is the current mathematics collaboration of the week! Please help improve it to featured article standard. ...
In mathematics, a polynomial is an expression in which constants and powers of variables are combined using (only) addition, subtraction, and multiplication. ...
Refactoring is done as a separate step, to simplify testing. At the end of the refactoring, any change in behavior is clearly a bug and can be fixed separately from the problem of debugging the new behavior. A computer bug is an error, flaw, mistake, failure, or fault in a computer program that prevents it from working as intended, or produces an incorrect result. ...
Debugging is a methodical process of finding and reducing the number of bugs, or defects, in a computer program or a piece of electronic hardware thus making it behave as expected. ...
Martin Fowler's book Refactoring is the classic reference. Although refactoring code has been done informally for years, William Opdyke's 1993 PhD dissertation [1] is the first known paper to specifically examine refactoring. All of these resources provide a catalog of common methods for refactoring; a refactoring method has a description of how to apply the method and indicators for when you should (or should not) apply the method. Martin Fowler is an author and a famous speaker on software architecture, specialized on Object-Oriented analysis and design, UML, Patterns, and agile software development methodologies. ...
William Opdyke is a professor of computer science and a co-author of Refactoring (book). ...
1993 (MCMXCIII) was a common year starting on Friday of the Gregorian calendar and marked the Beginning of the International Decade to Combat Racism and Racial Discrimination (1993-2003). ...
A description consists of an enumeration of the quantitative and qualitative parameters which define something, that is, what something looks like, sounds like, feels like. ...
method (from Greek methodos, met hodos literally way across). The word entered English in 1541 via French and Latin. ...
Indicator may mean: pH indicator, a chemical detector for protons in acid-base titrations Redox indicator, a chemical detector for redox titrations Complexometric indicator, a chemical detector for metal ions in complexometric titrations Honeyguide, a genus of birds Turn signal of an automobile Economic indicator or business indicator Indicator function...
Refactoring is thought by many to be an important concept. It has been named as one of the most important software innovations by author and commentator David A. Wheeler. A concept is an abstract, idea, notion, or entity that serves to designate a category or class of entities, events, phenomena or relations between them. ...
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Common refactorings - Change Method Signature
- Convert Local Variable to Field
- Encapsulate Field
- Extract Class
- Extract Interface
- Extract Local Variable
- Extract Method (to turn part of a larger method into a new method. By breaking down code in smaller pieces, it is more easily understandable)
- Generalize Type
- Inline
- Introduce Factory
- Introduce Parameter
- Pull Up
- Push Down
- Rename Method (changing the name of a method into a new one that better reveals its purpose).
- Break down large functions—Functions that grow in use also grow in size. After a certain point, it becomes clear that functions can benefit from using functions themselves. Your eyes probe the function looking for a likely candidate to relocate elsewhere. This candidate is chosen for being the largest stretch of code that really has nothing to do with the enclosing function. This lets us easily think up a name that explains what the new function does without having to resort to something contrived just to distinguish it from the original function. (This section is originally from Perl Design Patterns Book).
This article or section should be merged with type signature In computer programming, especially object-oriented programming, a method is commonly identified by its unique method signature. ...
Encapsulate Field Encapsulating a field involves providing methods that can be used to read/write to/from the field rather than accessing the field directly. ...
The Extract Interface refactoring can be applied to one or many classes simultaneously. ...
Used mainly in object-oriented programming, the term method refers to a piece of code that is exclusively associated either with a class (called class methods, static methods, or factory methods) or with an object (called instance methods). ...
This article needs to be cleaned up to conform to a higher standard of quality. ...
In software engineering, Pull Up refactoring involves moving a method from a Subclass into a Superclass . ...
Push Down The Push Down refatoring involves moving a method from a SuperClass into a SubClass . ...
In computer science, a subroutine (function, procedure, or subprogram) is a sequence of code which performs a specific task, as part of a larger program, and is grouped as one, or more, statement blocks; such code is sometimes collected into software libraries. ...
Perl Design Patterns Book is an online textbook about Perl style and design and analysis. ...
Forth The term "factoring" has been used in the Forth community since at least the early 1980s. Chapter Six of Leo Brodie's book Thinking Forth (1984) is dedicated to the subject. Forth is a procedural, stack-oriented, reflective programming language and programming environment. ...
1984 (MCMLXXXIV) was a leap year starting on Sunday of the Gregorian calendar. ...
In Forth, factoring has essentially the same meaning that refactoring does in extreme programming—to break down a function (a "word" in Forth) into smaller, more easily maintained functions. To meet Wikipedias quality standards, this article or section may require cleanup. ...
In computer science, a subroutine (function, procedure, or subprogram) is a sequence of code which performs a specific task, as part of a larger program, and is grouped as one, or more, statement blocks; such code is sometimes collected into software libraries. ...
Refactoring other text The term refactoring originated in computer programming, but the concept has also been applied when modifying any text. HTML and JavaScript in an IDE that uses color coding to highlight various keywords and help the developer see the function of each piece of code. ...
On Wiki websites, refactoring refers to the process of rewriting and reorganizing text to shorten it while preserving content. This particularly applies to discussions, which thus can be made accessible to people who are interested in the arguments made in the discussion, and the information to be gleaned from it, rather than the history of the discussion itself. Refactoring can be difficult to do in such a way that it makes all participants of a discussion happy. A wiki (IPA: <wee-kee> or <wick-ey>) is a type of website that allows anyone visiting the site to add, remove, or otherwise edit all content, very quickly and easily, sometimes without the need for registration. ...
Debate is a formalized system of (usually) logical argument. ...
Etymology The first known use of the term "refactoring" in the published literature was in the article, Refactoring: An Aid in Designing Application Frameworks and Evolving Object-Oriented Systems, Proceedings of the Symposium on Object Oriented Programming Emphasizing Practical Applications (SOOPPA) September, 1990, ACM by William F. Opdyke and Ralph E. Johnson [2]. William Opdyke's Ph.D. thesis on "Refactoring Object-Oriented Framework", University of Illinois, was published in 1992 [3]. The term "refactoring" was almost certainly used before then. Refactoring as a technique was definitely used before then.
As a neologism, it is clearly a reference to mathematical factoring. A neologism is a word, term, or phrase which has been recently created (coined) — often to apply to new concepts, or to reshape older terms in newer language form. ...
In mathematics, factorization or factoring is the decomposition of an object (for example, a number, a polynomial, or a matrix) into a product of other objects, or factors, which when multiplied together give the original. ...
References - Fowler, Martin (1999). Refactoring. Improving the Design of Existing Code, Addison-Wesley. ISBN 0201485672.
- Kerievsky, Joshua. Refactoring To Patterns, Addison-Wesley. ISBN 0321213351.
- Wake, William C.. Refactoring Workbook, Addison-Wesley. ISBN 0-321-10929-5.
Martin Fowler is an author and a famous speaker on software architecture, specialized on Object-Oriented analysis and design, UML, Patterns, and agile software development methodologies. ...
See also Code review is peer review of computer source code intended to find and fix mistakes overlooked in the initial development phase, improving overall code quality. ...
Peer review (known as refereeing in some academic fields) is a scholarly process used in the publication of manuscripts and in the awarding of funding for research. ...
In software engineering, a design pattern is a general repeatable solution to a commonly-occurring problem in software design. ...
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