type-challenges-judge

Type Challenges Judge

Problems

Progress

ObjectEntries

提出詳細

type ObjectEntries<T> = {
  [K in keyof T]-?: [K, T[K] extends undefined ? undefined : Required<T>[K]]
}[keyof T]

提出日時	2025-09-15 07:39:13
問題	ObjectEntries
ユーザー	balckowl
ステータス	Accepted

テストケース

import type { Equal, Expect } from '@type-challenges/utils'

interface Model {
  name: string
  age: number
  locations: string[] | null
}

type ModelEntries = ['name', string] | ['age', number] | ['locations', string[] | null]

type cases = [
  Expect<Equal<ObjectEntries<Model>, ModelEntries>>,
  Expect<Equal<ObjectEntries<Partial<Model>>, ModelEntries>>,
  Expect<Equal<ObjectEntries<{ key?: undefined }>, ['key', undefined]>>,
  Expect<Equal<ObjectEntries<{ key: undefined }>, ['key', undefined]>>,
]