03057-easy-push.ts

// ============= Test Cases =============
import type { Equal, Expect } from './test-utils';

type cases = [
  Expect<Equal<Push<[], 1>, [1]>>,
  Expect<Equal<Push<[1, 2], '3'>, [1, 2, '3']>>,
  Expect<Equal<Push<['1', 2, '3'], boolean>, ['1', 2, '3', boolean]>>
];

// ============= Your Code Here =============
type Push<T extends any[], U> = [...T, U];