Code Quality terms
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Most referenced — Code Quality
Refactoring Boolean Flag Parameters 2Types of Code Duplication (Clone vs Semantic) 2Data Transfer Object (DTO) 1Fluent Builder Pattern 1Reducing Cyclomatic Complexity Techniques 1Inline Temp Variable Refactoring 1Extract Class Refactoring 1Code Readability Metrics 1
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Types of Coupling
Coupling grades from Content (worst — direct internal access) to Message (best — pure interface communication), guiding decoupling decisions.
3mo ago
Code Quality advanced
Types of Technical Debt
Technical debt is not uniform — deliberate vs inadvertent, reckless vs prudent quadrants define the nature of debt and the appropriate response to each type.
3mo ago
Code Quality intermediate
Unit of Work
A pattern that tracks all changes made to domain objects during a business transaction and coordinates writing them out as a single atomic database operation.
3mo ago
Code Quality advanced
Value Object
PHP 8.1+
6
A small immutable object defined by its value rather than its identity — two Value Objects with the same data are equal.
3mo ago
Code Quality intermediate
Visitor Pattern
PHP 5.0+
1
A behavioural pattern that separates an algorithm from the objects it operates on — adding new operations to a class hierarchy without modifying those classes.
3mo ago
Code Quality advanced
YAGNI
PHP 5.0+
2
You Aren't Gonna Need It — don't implement functionality until it's actually required.
3mo ago
Code Quality beginner
Code Smell
3
A surface indication in code that usually corresponds to a deeper design problem — not a bug, but a maintainability risk.
3mo ago
Code Quality beginner
Cognitive Complexity
7
A readability-focused complexity metric that penalises nesting more heavily than cyclomatic complexity.
3mo ago
Code Quality intermediate
Dependency Injection
PHP 5.0+
3
Passing dependencies into a class rather than creating them inside — makes classes testable and loosely coupled.
3mo ago
Code Quality intermediate
DRY Principle
PHP 5.0+
Don't Repeat Yourself — every piece of knowledge should have a single, unambiguous representation in the codebase.
3mo ago
Code Quality beginner
Immutability
PHP 8.1+
3
Objects whose state cannot change after construction — immutable objects are inherently thread-safe, predictable, and easy to reason about.
3mo ago
Code Quality intermediate
Magic Number
PHP 5.0+
1
A numeric literal with no explanation — its meaning is unclear without context, harming readability and maintainability.
3mo ago
Code Quality beginner
SOLID Principles (Overview)
PHP 5.0+
1
Five object-oriented design principles — SRP, OCP, LSP, ISP, DIP — that together guide towards maintainable, extensible code.
3mo ago
Code Quality intermediate