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Martin Fowler (18 December 1963) is a British software developer, [2] author and international public speaker on software development, specialising in object-oriented analysis and design, UML, patterns, and agile software development methodologies, including extreme programming. His 1999 book Refactoring popularised the practice of code ...
It states that two instances of similar code do not require refactoring, but when similar code is used three times, it should be extracted into a new procedure. The rule was popularised by Martin Fowler in Refactoring [1] and attributed to Don Roberts. Duplication is considered a bad practice in programming because it makes the code harder to ...
Martin Fowler's book Refactoring: Improving the Design of Existing Code is the canonical reference. [according to whom?] The terms "factoring" and "factoring out" have been used in this way in the Forth community since at least the early 1980s. Chapter Six of Leo Brodie's book Thinking Forth (1984) [28] is dedicated to the subject.
Thus, a code smell is a driver for refactoring. Factors such as the understandability of code, how easy it is to be modified, the ease in which it can be enhanced to support functional changes, the code's ability to be reused in different settings, how testable the code is, and code reliability are factors that can be used to identify code smells.
Coined by Martin Fowler, [1] its name derives from the strangler fig plant, which tends to grow on trees and eventually kill them. It has also been called Ship of Theseus pattern, named after a philosophical paradox. [2] The pattern can be used at the method level or the class level. [3]
R. C. Martin: "Design smells are the odors of rotting software." [4] Fowler: "Smells are certain structures in the code that suggest (sometimes they scream for) the possibility of refactoring." [2] Design smells indicate the accumulated design debt (one of the prominent dimensions of technical debt). Bugs or unimplemented features are not ...
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Fowler calls such external classes transaction scripts. This pattern is a common approach in Java applications, possibly encouraged by technologies such as early versions of EJB 's Entity Beans , [ 1 ] as well as in .NET applications following the Three-Layered Services Application architecture where such objects fall into the category of ...
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