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type Trunc<N extends number | string> = `${N}` extends `${infer I}.${infer _}` ? I:`${N}`;
提出日時2022-06-30 23:39:13
問題Trunc
ユーザーwaki285
ステータスAccepted
テストケース
import type { Equal, Expect } from '@type-challenges/utils'

type cases = [
  Expect<Equal<Trunc<0.1>, '0'>>,
  Expect<Equal<Trunc<1.234>, '1'>>,
  Expect<Equal<Trunc<12.345>, '12'>>,
  Expect<Equal<Trunc<-5.1>, '-5'>>,
  Expect<Equal<Trunc<'1.234'>, '1'>>,
  Expect<Equal<Trunc<'-10.234'>, '-10'>>,
  Expect<Equal<Trunc<10>, '10'>>,
]