FirstUniqueCharIndex

约 104 字小于 1 分钟

2026-02-11

题目

Given a string s, find the first non-repeating character in it and return its index. If it does not exist, return -1. (Inspired by leetcode 387)

解题思路

待补充

答案

type FirstUniqueCharIndex<T extends string> = any

验证

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

type cases = [
  Expect<Equal<FirstUniqueCharIndex<'leetcode'>, 0>>,
  Expect<Equal<FirstUniqueCharIndex<'loveleetcode'>, 2>>,
  Expect<Equal<FirstUniqueCharIndex<'aabb'>, -1>>,
  Expect<Equal<FirstUniqueCharIndex<''>, -1>>,
  Expect<Equal<FirstUniqueCharIndex<'aaa'>, -1>>,
]

参考

无