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Refactoring is usually motivated by noticing a code smell. [2] For example, the method at hand may be very long, or it may be a near duplicate of another nearby method. Once recognized, such problems can be addressed by refactoring the source code, or transforming it into a new form that behaves the same as before but that no longer "smells".
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 ...
Examples of refactoring: moving code to where it most logically belongs; removing duplicate code; making names self-documenting; splitting methods into smaller pieces; re-arranging inheritance hierarchies; Repeat Repeat the process, starting at step 2, with each test on the list until all tests are implemented and passing.
In contrast, your tests, with more examples, become ever more specific and focused on the problem. So you start with a constant for your first test, for your next test you might change that constant to an “if” for the next step you might introduce a loop. Each time you’re moving up the priority premise.
In the previous example, all of the variables could be encapsulated into a single "Person" object, which could be passed around by itself. Additionally, the programmer may then recognize that the welcomeNew method would be better associated with the Person class, and could then come up with other relevant actions associated with the Person.
A decomposition paradigm in computer programming is a strategy for organizing a program as a number of parts, and usually implies a specific way to organize a program text. Typically the aim of using a decomposition paradigm is to optimize some metric related to program complexity, for example a program's modularity or its maintainability.
Code cleanup can also refer to the removal of all computer programming from source code, or the act of removing temporary files after a program has finished executing.. For instance, in a web browser such as Chrome browser or Maxthon, code must be written in order to clean up files such as cookies and storage. [6]
FizzBuzzEnterpriseEdition offers a humorous example of over-complexity introduced by design patterns. [33] By definition, a pattern must be programmed anew into each application that uses it. Since some authors see this as a step backward from software reuse as provided by components, researchers have worked to turn patterns into components ...