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Last of Array

提出詳細

type Last<T extends ReadonlyArray<any>, U = null> = T extends [infer First, ...infer Rest] ? Last<Rest, First> : U
提出日時2023-04-30 03:10:31
問題Last of Array
ユーザーDowanna
ステータスAccepted
テストケース
import type { Equal, Expect } from '@type-challenges/utils'

type cases = [
  Expect<Equal<Last<[3, 2, 1]>, 1>>,
  Expect<Equal<Last<[() => 123, { a: string }]>, { a: string }>>,
]