type-challenges-judge

Type Challenges Judge

Problems

Progress

Binary to Decimal

提出詳細

type BinaryToDecimal<S extends string, Acc extends readonly unknown[]=[]> =
  S extends ""
  ? Acc["length"]
  : S extends `0${infer S2}`
    ? BinaryToDecimal<S2, [...Acc, ...Acc]>
    : S extends `1${infer S2}`
      ? BinaryToDecimal<S2, [...Acc, ...Acc, 0]>
      : never

提出日時	2023-09-19 05:14:54
問題	Binary to Decimal
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<BinaryToDecimal<'10'>, 2>>,
  Expect<Equal<BinaryToDecimal<'0011'>, 3>>,
  Expect<Equal<BinaryToDecimal<'00000000'>, 0>>,
  Expect<Equal<BinaryToDecimal<'11111111'>, 255>>,
  Expect<Equal<BinaryToDecimal<'10101010'>, 170>>,
]