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Promise.all

提出詳細

type Helper<T> = T extends PromiseLike<infer U> ? Helper<U> : T;

declare function PromiseAll<T extends readonly any[]>
  (values: readonly [...T]):
  Promise<{[key in keyof T]: Helper<T[key]>}>
提出日時2023-09-13 13:12:17
問題Promise.all
ユーザーsankantsu
ステータスWrong Answer
テストケース
import type { Equal, Expect } from '@type-challenges/utils'

const promiseAllTest1 = PromiseAll([1, 2, 3] as const)
const promiseAllTest2 = PromiseAll([1, 2, Promise.resolve(3)] as const)
const promiseAllTest3 = PromiseAll([1, 2, Promise.resolve(3)])

type cases = [
  Expect<Equal<typeof promiseAllTest1, Promise<[1, 2, 3]>>>,
  Expect<Equal<typeof promiseAllTest2, Promise<[1, 2, number]>>>,
  Expect<Equal<typeof promiseAllTest3, Promise<[number, number, number]>>>,
]