L0v3ch4n

外观

Sum

约 167 字小于 1 分钟

2026-02-11

题目

Implement a type Sum<A, B> that summing two non-negative integers and returns the sum as a string. Numbers can be specified as a string, number, or bigint.

For example,

type T0 = Sum<2, 3> // '5'
type T1 = Sum<'13', '21'> // '34'
type T2 = Sum<'328', 7> // '335'
type T3 = Sum<1_000_000_000_000n, '123'> // '1000000000123'

解题思路

待补充

答案

type Sum<A extends string | number | bigint, B extends string | number | bigint> = string

验证

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

type cases = [
  Expect<Equal<Sum<2, 3>, '5'>>,
  Expect<Equal<Sum<'13', '21'>, '34'>>,
  Expect<Equal<Sum<'328', 7>, '335'>>,
  Expect<Equal<Sum<1_000_000_000_000n, '123'>, '1000000000123'>>,
  Expect<Equal<Sum<9999, 1>, '10000'>>,
  Expect<Equal<Sum<4325234, '39532'>, '4364766'>>,
  Expect<Equal<Sum<728, 0>, '728'>>,
  Expect<Equal<Sum<'0', 213>, '213'>>,
  Expect<Equal<Sum<0, '0'>, '0'>>,
]

参考

无