Type Challenges Judge

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Length of String

提出詳細

type LengthOfString<T extends string, Length extends string[] = []> = T extends `${infer Head}${infer Rest}` ? LengthOfString<Rest, [Head, ...Length]> : Length['length']
提出日時2023-05-08 01:44:09
問題Length of String
ユーザーDowanna
ステータスAccepted
テストケース
import type { Equal, Expect } from '@type-challenges/utils'

type cases = [
  Expect<Equal<LengthOfString<''>, 0>>,
  Expect<Equal<LengthOfString<'kumiko'>, 6>>,
  Expect<Equal<LengthOfString<'reina'>, 5>>,
  Expect<Equal<LengthOfString<'Sound! Euphonium'>, 16>>,
]