This document is a guide to SOLID principles and clean code practices essential for all code implementations.
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Detailed SOLID Principles - Explanations and comparative examples of the 5 design principles (Single Responsibility, Open/Closed, Liskov Substitution, Interface Segregation, Dependency Inversion)
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Basics of Clean Code - Fundamentals of naming conventions, function design, reducing nesting, and eliminating magic numbers in daily implementations
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Quality Checklist - Verification of compliance with design principles, code smell detection, and refactoring decision criteria
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Quick Reference - One-line summaries for quick reference, common errors and fixes, and code review points
The document systematically explains patterns that support extensibility and maintainability, starting with the Single Responsibility Principle ("There should be only one reason to change").
Additional principles such as DRY, YAGNI, and KISS are also included, providing frameworks to enhance design effectiveness.