Subtract

约 130 字小于 1 分钟

2026-02-11

题目

Implement the type Subtraction that is - in Javascript by using BuildTuple.

If the minuend is less than the subtrahend, it should be never.

It's a simple version.

For example

Subtract<2, 1> // expect to be 1
Subtract<1, 2> // expect to be never

解题思路

待补充

答案

// M => minuend, S => subtrahend
type Subtract<M extends number, S extends number> = any

验证

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

type cases = [
  Expect<Equal<Subtract<1, 1>, 0>>,
  Expect<Equal<Subtract<2, 1>, 1>>,
  Expect<Equal<Subtract<1, 2>, never>>,
  // @ts-expect-error
  Expect<Equal<Subtract<1000, 999>, 1>>,
]

参考

无