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Subsequence

提出詳細

type SubsequenceFromHead<T> = T extends [infer Head, ...infer Tail]
  ? [] | [Head, ...Subsequance<Tail>] : never
type Subsequence<T> = T extends [Head, ...infer Tail]
  ? SubsequenceFromHead<T> | Subsequence<Tail>
提出日時2022-06-24 02:36:43
問題Subsequence
ユーザーcisdur
ステータスWrong Answer
テストケース
import type { Equal, Expect } from '@type-challenges/utils'

type cases = [
  Expect<Equal<Subsequence<[1, 2]>, [] | [1] | [2] | [1, 2]>>,
  Expect<Equal<Subsequence<[1, 2, 3]>, [] | [1] | [2] | [1, 2] | [3] | [1, 3] | [2, 3] | [1, 2, 3] >>,
]