2793 - Mutable

Answer TestCases

实现一个通用的类型 Mutable<T>，使类型 T 的全部属性可变（非只读）。

例如：

interface Todo {
  readonly title: string
  readonly description: string
  readonly completed: boolean
}

type MutableTodo = Mutable<Todo> // { title: string; description: string; completed: boolean; }

Solution

type Mutable<T extends Record<string, any>> = {
  -readonly [K in keyof T]: T[K]
}

-readonly 用于将属性变为非只读