TypeScript Generics Deep Dive: Constraints...

TypeScript Generics Deep Dive: Constraints, Inference, and Real-World Patterns Generics are the most powerful feature in TypeScript that most developers underuse. Here's everything you need to go from basic <T> to production-grade patterns. Why Generics Exist Without generics, you have two bad options: // Option 1: specific types (not reusable) function firstNumber(arr: number[]): number { return arr[0] } function firstString(arr: string[]): string { return arr[0] } // Option 2: any (loses type