type-challenges-judge

Type Challenges Judge

Problems

Progress

Ranking

PartialByKeys

提出詳細

type PartialByKeys<T, K = string> = Omit<{ [P in keyof T as P extends K ? P : never]?: T[P] } & { [P in keyof T as P extends K ? never : P]: T[P] }, never>

提出日時	2024-09-11 11:03:13
問題	PartialByKeys
ユーザー	ookkoouu
ステータス	Accepted

テストケース

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

interface User {
  name: string
  age: number
  address: string
}

interface UserPartialName {
  name?: string
  age: number
  address: string
}

interface UserPartialNameAndAge {
  name?: string
  age?: number
  address: string
}

type cases = [
  Expect<Equal<PartialByKeys<User, 'name'>, UserPartialName>>,
  Expect<Equal<PartialByKeys<User, 'name' | 'unknown'>, UserPartialName>>,
  Expect<Equal<PartialByKeys<User, 'name' | 'age'>, UserPartialNameAndAge>>,
  Expect<Equal<PartialByKeys<User>, Partial<User>>>,
]