Reverse

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题目

实现类型版本的数组反转 Array.reverse

例如：

type a = Reverse<["a", "b"]>; // ['b', 'a']
type b = Reverse<["a", "b", "c"]>; // ['c', 'b', 'a']

解答

type Reverse<T extends unknown[]> = T extends [...infer Rest, infer Last]
  ? [Last, ...Reverse<Rest>]
  : T;