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  2. Code refactoring - Wikipedia

    en.wikipedia.org/wiki/Code_refactoring

    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".

  3. Data clump - Wikipedia

    en.wikipedia.org/wiki/Data_clump

    This beckons as another opportunity for refactoring to be used in order to improve the quality of the code. Refactoring to eliminate data clumps does not need to be done by hand. Many modern fully featured IDEs have functionality (often labeled as "Extract Class") that is capable of performing this refactoring automatically or nearly so. This ...

  4. Rule of three (computer programming) - Wikipedia

    en.wikipedia.org/wiki/Rule_of_three_(computer...

    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 ...

  5. Software design pattern - Wikipedia

    en.wikipedia.org/wiki/Software_design_pattern

    Examples include Singleton, Factory Method, and Observer. [35] [36] [37] Software Architecture Pattern refers to a reusable, proven solution to a recurring problem at the system level, addressing concerns related to the overall structure, component interactions, and quality attributes of the system.

  6. Observer pattern - Wikipedia

    en.wikipedia.org/wiki/Observer_pattern

    The observer design pattern is a behavioural pattern listed among the 23 well-known "Gang of Four" design patterns that address recurring design challenges in order to design flexible and reusable object-oriented software, yielding objects that are easier to implement, change, test and reuse.

  7. Type generalization - Wikipedia

    en.wikipedia.org/wiki/Type_generalization

    An example of generalizing a type would be moving a method from a child to a parent class for common use by all the parent class' children, not just the original child. Another example, in the Java programming language , would be access to an object via an interface which isn't tied into a specific implementation of that interface.

  8. Adapter pattern - Wikipedia

    en.wikipedia.org/wiki/Adapter_pattern

    The adapter [2] design pattern is one of the twenty-three well-known Gang of Four design patterns that describe how to solve recurring design problems to design flexible and reusable object-oriented software, that is, objects that are easier to implement, change, test, and reuse.

  9. Flyweight pattern - Wikipedia

    en.wikipedia.org/wiki/Flyweight_pattern

    For example, the factory interface is commonly implemented as a singleton to provide global access for creating flyweights. Generally speaking, the retrieval algorithm begins with a request for a new object via the factory interface.