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Readonly 2

提出詳細

type MyReadonly2<T, K extends keyof T = keyof T> = Omit<T, K> & {
  readonly [Key in K]: T[Key];
};
提出日時2023-05-25 03:56:05
問題Readonly 2
ユーザーmrsekut
ステータスAccepted
テストケース
import type { Alike, Expect } from '@type-challenges/utils'

type cases = [
  Expect<Alike<MyReadonly2<Todo1>, Readonly<Todo1>>>,
  Expect<Alike<MyReadonly2<Todo1, 'title' | 'description'>, Expected>>,
  Expect<Alike<MyReadonly2<Todo2, 'title' | 'description'>, Expected>>,
]

interface Todo1 {
  title: string
  description?: string
  completed: boolean
}

interface Todo2 {
  readonly title: string
  description?: string
  completed: boolean
}

interface Expected {
  readonly title: string
  readonly description?: string
  completed: boolean
}