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Length of String

提出詳細

type LengthOfString<S extends string, Acc extends readonly unknown[]=[]> =
  S extends `${infer Head}${infer Tail}`
  ? LengthOfString<Tail,[...Acc, unknown]>
  : Acc["length"]
提出日時2023-09-14 02:27:51
問題Length of String
ユーザーsankantsu
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>>,
]