Type Challenges Judge

Problems

Progress

PickByType

提出詳細

type PickByType<T, U> = {
  [K in keyof T as T[K] extends U ? K : never]: T[K]
}
提出日時2023-08-12 13:11:37
問題PickByType
ユーザーtekihei2317
ステータスAccepted
テストケース
import type { Equal, Expect } from '@type-challenges/utils'

interface Model {
  name: string
  count: number
  isReadonly: boolean
  isEnable: boolean
}

type cases = [
  Expect<Equal<PickByType<Model, boolean>, { isReadonly: boolean; isEnable: boolean }>>,
  Expect<Equal<PickByType<Model, string>, { name: string }>>,
  Expect<Equal<PickByType<Model, number>, { count: number }>>,
]