Search

Lessons (3)

• Code Smells & Refactoring

  … this.currency }).format(this.cents / 100); } } Switch statements → Polymorphism js // ❌ This switch is repeated in area(), perimeter(), draw …

• O — Open/Closed Principle

  … classes, functions, config), not editing tested code. - Use polymorphism, strategy maps, plugins or middleware to create extension points …

• L — Liskov Substitution Principle

  … Prefer composition or separate types. - LSP is what makes polymorphism (and the Open/Closed Principle ) safe.