00949-medium-anyof.ts

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

type cases = [
  Expect<
    Equal<AnyOf<[1, 'test', true, [1], { name: 'test' }, { 1: 'test' }]>, true>
  >,
  Expect<Equal<AnyOf<[1, '', false, [], {}]>, true>>,
  Expect<Equal<AnyOf<[0, 'test', false, [], {}]>, true>>,
  Expect<Equal<AnyOf<[0, '', true, [], {}]>, true>>,
  Expect<Equal<AnyOf<[0, '', false, [1], {}]>, true>>,
  Expect<Equal<AnyOf<[0, '', false, [], { name: 'test' }]>, true>>,
  Expect<Equal<AnyOf<[0, '', false, [], { 1: 'test' }]>, true>>,
  Expect<
    Equal<AnyOf<[0, '', false, [], { name: 'test' }, { 1: 'test' }]>, true>
  >,
  Expect<Equal<AnyOf<[0, '', false, [], {}, undefined, null]>, false>>,
  Expect<Equal<AnyOf<[]>, false>>
]

// ============= Your Code Here =============
type Falsy = { [key: string]: never } | false | 0 | '' | null | undefined | []

type AnyOf<T extends readonly any[]> = T extends [infer Head, ...infer Tail]
  ? Head extends Falsy
    ? AnyOf<Tail>
    : true
  : false