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Unshift

提出詳細

type Unshift<T extends any[], U> = [U, ...T];
提出日時2022-10-06 13:20:03
問題Unshift
ユーザーyotarotsukada
ステータスAccepted
テストケース
import type { Equal, Expect } from '@type-challenges/utils'

type cases = [
  Expect<Equal<Unshift<[], 1>, [1]>>,
  Expect<Equal<Unshift<[1, 2], 0>, [0, 1, 2 ]>>,
  Expect<Equal<Unshift<['1', 2, '3'], boolean>, [boolean, '1', 2, '3']>>,
]