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外观

CheckRepeatedChars

约 92 字小于 1 分钟

2026-02-11

题目

判断一个string类型中是否有相同的字符

type CheckRepeatedChars<'abc'>   // false
type CheckRepeatedChars<'aba'>   // true

解题思路

待补充

答案

type CheckRepeatedChars<T extends string> = any

验证

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

type cases = [
  Expect<Equal<CheckRepeatedChars<'abc'>, false>>,
  Expect<Equal<CheckRepeatedChars<'abb'>, true>>,
  Expect<Equal<CheckRepeatedChars<'cbc'>, true>>,
  Expect<Equal<CheckRepeatedChars<''>, false>>,
]

参考

无