ts Exclude and Extract

TypeScript:

interface Worker {
  name: string;
  age: string;
}

interface student {
  name: string;
  addr: string;
}

export type ExcludeKeys = Exclude<keyof Worker, keyof student>;

export type ExtractKeys = Extract<keyof Worker, keyof student>;

Exclude:  在Worker中找不存于student中的key。

Extract:   在Worker中找存在于student中的key。