🔨 Refactoring & Technical Debt
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# 🔨 Refactoring & Technical Debt ## 1. 🎯 Learning Objectives - Identify common code smells - Apply refactoring techniques: extract method, rename, move - Manage technical debt effectively ## 2.
🔨 Refactoring & Technical Debt
1. 🎯 Learning Objectives
- Identify common code smells
- Apply refactoring techniques: extract method, rename, move
- Manage technical debt effectively
2. 📖 Core Content
3.1 Code Smells
| Smell | Description | Fix |
|---|---|---|
| Long Method | Method does too much | Extract methods |
| Large Class | Too many responsibilities | Extract class |
| Duplicate Code | Same logic in multiple places | Extract method, pull up |
| Feature Envy | Method uses another class's data too much | Move method |
| Primitive Obsession | Using primitives instead of objects | Create value objects |
3.2 Technical Debt
Technical debt = cost of rework from choosing quick/easy solutions instead of better approaches.
| Type | Description | Example |
|---|---|---|
| Prudent/Deliberate | "We know this isn't ideal, but speed matters now" | Shipping MVP |
| Reckless/Inadvertent | "We didn't know any better" | No tests, copy-paste code |
Managing debt: Track in backlog, allocate 20% capacity for refactoring, pay down highest-interest debt first.
4. 📝 Practice Questions
Q1: A 500-line function handles input validation, business logic, database access, and formatting. What refactoring is needed?Answer: Extract Method — separate into validation(), processBusinessLogic(), saveToDatabase(), and formatOutput(). Each has single responsibility. Join Discord PreviousArchitectural StylesNextProject Management