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Last of Array

提出詳細

type Last<T extends any[]> = T extends [infer First, ...infer Rest]
  ? Rest['length'] extends 0
    ? First
    : Last<Rest>
  : never;
提出日時2023-08-10 02:21:49
問題Last of Array
ユーザーtekihei2317
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 }>>,
]