Diff

约 144 字小于 1 分钟

2026-02-11

题目

获取两个接口类型中的差值属性。

type Foo = {
  a: string;
  b: number;
}
type Bar = {
  a: string;
  c: boolean
}

type Result1 = Diff<Foo,Bar> // { b: number, c: boolean }
type Result2 = Diff<Bar,Foo> // { b: number, c: boolean }

解题思路

待补充

答案

type Diff<O, O1> = any

验证

import type { Equal, Expect } from '@type-challenges/utils'

type Foo = {
  name: string
  age: string
}
type Bar = {
  name: string
  age: string
  gender: number
}
type Coo = {
  name: string
  gender: number
}

type cases = [
  Expect<Equal<Diff<Foo, Bar>, { gender: number }>>,
  Expect<Equal<Diff<Bar, Foo>, { gender: number }>>,
  Expect<Equal<Diff<Foo, Coo>, { age: string, gender: number }>>,
  Expect<Equal<Diff<Coo, Foo>, { age: string, gender: number }>>,
]

参考

无