11 — Generics

Core Concepts

• Generic functions — function fn<T>(arg: T): T
• Generic interfaces — interface Box<T> { value: T }
• Generic classes — class Stack<T> { ... }
• Constraints — <T extends SomeType> restricts what T can be
• Default type params — <T = string> fallback if not specified
• Multiple type params — <K, V> for key-value patterns
• Generic utility patterns — creating reusable type-safe abstractions

When to Use Generics