Why Clean Code Matters

Clean code isn't about following rigid rules — it's about communication. Code is read far more often than it's written.

Naming Conventions

Bad:

const d = new Date();
const fn = (a: number, b: number) => a + b;

Good:

const currentDate = new Date();
const calculateTotal = (price: number, tax: number) => price + tax;

Functions Should Do One Thing

Each function should have a single responsibility:

// Bad: does too many things
function processUser(user: User) {
  validateUser(user);
  saveToDatabase(user);
  sendEmail(user);
  logActivity(user);
}

// Good: each function does one thing
function validateUser(user: User): ValidationResult { ... }
function saveUser(user: User): Promise<User> { ... }
function sendWelcomeEmail(user: User): Promise<void> { ... }

Keep It Simple

"Any fool can write code that a computer can understand. Good programmers write code that humans can understand." — Martin Fowler

Conclusion

Clean code is a practice, not a destination. Continuously refactor and improve.