00015-medium-last.ts

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

type cases = [
  Expect<Equal<Last<[2]>, 2>>,
  Expect<Equal<Last<[3, 2, 1]>, 1>>,
  Expect<Equal<Last<[() => 123, { a: string }]>, { a: string }>>
]

// ============= Your Code Here =============
type Last<T extends any[]> = T extends [...infer _, infer Tail] ? Tail : never