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In computer programming and software design, code refactoring is the process of restructuring existing source code—changing the factoring—without changing its external behavior. Refactoring is intended to improve the design, structure, and/or implementation of the software (its non-functional attributes), while preserving its functionality.
Rule of three ("Three strikes and you refactor") is a code refactoring rule of thumb to decide when similar pieces of code should be refactored to avoid duplication. 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.
A database refactoring is a simple change to a database schema that improves its design while retaining both its behavioral and informational semantics. Database refactoring does not change the way data is interpreted or used and does not fix bugs or add new functionality. Every refactoring to a database leaves the system in a working state ...
Test-driven development (TDD) is a way of writing code that involves writing an automated unit-level test case that fails, then writing just enough code to make the test pass, then refactoring both the test code and the production code, then repeating with another new test case.
Furthermore, the risks of breaking code when refactoring may outweigh any maintenance benefits. [5] A study by Wagner, Abdulkhaleq, and Kaya concluded that while additional work must be done to keep duplicates in sync, if the programmers involved are aware of the duplicate code there weren't significantly more faults caused than in unduplicated ...
Code cleanup refers to the act of writing so that it cleans up leftover and other unwanted materials from memory and the filesystem. It is sometimes treated as a synonym of refactoring code, which involves making the source code itself easier to understand, maintain, and modify.
Refactoring is not deletion—it’s an iterative process. Flagged provisions would undergo review, ensuring essential laws remain intact. Others may worry about entrusting this process to machines.
Many modern fully featured IDEs have functionality (often labeled as "Extract Class") that is capable of performing this refactoring automatically or nearly so. This can decrease the cost and improve the reliability of the refactoring, thus enabling otherwise reluctant developers to do so expediently.