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2. Code refactoring - Wikipedia

   en.wikipedia.org/wiki/Code_refactoring

   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.

3. Design Patterns - Wikipedia

   en.wikipedia.org/wiki/Design_Patterns

   Design Patterns: Elements of Reusable Object-Oriented Software (1994) is a software engineering book describing software design patterns.The book was written by Erich Gamma, Richard Helm, Ralph Johnson, and John Vlissides, with a foreword by Grady Booch.

4. Composite pattern - Wikipedia

   en.wikipedia.org/wiki/Composite_pattern

   The Composite [2] design pattern is one of the twenty-three well-known GoF 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.

5. 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.

6. Mediator pattern - Wikipedia

   en.wikipedia.org/wiki/Mediator_pattern

   The mediator [1] design pattern is one of the twenty-three well-known 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.

7. Factory method pattern - Wikipedia

   en.wikipedia.org/wiki/Factory_method_pattern

   The factory method design pattern solves problems such as: How can an object's subclasses redefine its subsequent and distinct implementation? The pattern involves creation of a factory method within the superclass that defers the object's creation to a subclass's factory method.

8. Rule of three (computer programming) - Wikipedia

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

   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.

9. Flyweight pattern - Wikipedia

   en.wikipedia.org/wiki/Flyweight_pattern

   Text editors, such as LibreOffice Writer, often use the flyweight pattern.. In computer programming, the flyweight software design pattern refers to an object that minimizes memory usage by sharing some of its data with other similar objects.