Generics Introduction

/*
  Generics
  - Help Write A Reusable Code
  - Allow To Pass Type As A Parameter To Another Type
  - You Will Be Able To Deal With Multiple Types Without Using ": Any Type"
  - We Can Create:
  --- Generic Classes
  --- Generic Functions
  --- Generic Methods
  --- Generic Interfaces
*/

function returnNumber(val: number) : number {
  return val;
}
function returnString(val: string) : string {
  return val;
}
function returnBoolean(val: boolean) : boolean {
  return val;
}

console.log(returnNumber(100));
console.log(returnString("Elzero"));
console.log(returnBoolean(true));

function returnType<T>(val: T) : T {
  return val;
}

console.log(returnType<number>(100));
console.log(returnType<string>("Elzero"));
console.log(returnType<boolean>(true));
console.log(returnType<number[]>([1, 2, 3, 4]));