Mutable
题目
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:
typescript
interface Todo {
readonly title: string;
readonly description: string;
readonly completed: boolean;
}
type MutableTodo = Mutable<Todo>; // { title: string; description: string; completed: boolean; }
解答
ts
type Mutable<T extends object> = {
-readonly [K in keyof T]: T[K];
};