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DRY: Don't Repeat Yourself

· programmmer

The Don't Repeat Yourself (DRY) principle, coined by Andy Hunt and Dave Thomas in The Pragmatic Programmer, is a fundamental concept in programming that emphasizes the importance of reducing duplication in code to achieve cleaner and more efficient software development.

🚮 Duplication is waste

1. Code duplication is wasteful.

2. It leads to increased maintenance.

3. It results in potential bugs.

4. It adds complexity to the code.

5. Adhering to DRY (Don't Repeat Yourself) ensures a single, authoritative representation of knowledge within a system.

🤖 Automate process

1. Automating repetitive processes in software development is crucial.

2. This automation should cover not only the code but also testing, integration, and build procedures.

3. The goal is to reduce errors and standardize workflows.

4. This approach ensures a streamlined and efficient software development process.

📐 Use abstraction

1. Abstraction techniques, like design patterns such as Abstract Factory, Factory Method, and Strategy, play a key role.

2. They help in the elimination of repetitive logic.

3. This leads to a more efficient and maintainable codebase.

4. These techniques reduce duplicated effort in solving common problems.

5. They also promote better structuring of the code.

6. The benefits of abstraction can extend to areas like database schema normalization.

☝️ Fundamental principle

1. DRY (Don't Repeat Yourself) is a fundamental software development principle.

2. It influences and complements other principles, such as Once and Only Once, Open/Closed, and Single Responsibility.

3. When DRY is applied to structure, logic, process, and function, it fosters the creation of simpler, maintainable, and higher-quality applications.

4. Repetition should only be used when it directly addresses actual, rather than imagined, problems.

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