Type Challenges Judge

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Length of String

提出詳細

type LengthOfString<S extends string, T extends string[] = []> = 
  S extends `${infer First}${infer Rest}`
    ? LengthOfString<Rest, [...T, First]>
    : T['length']
提出日時2023-09-11 01:32:13
問題Length of String
ユーザーsnaka
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>>,
]