桃子

```js let entry = { 'a.b.c.dd': 'abcdd', 'a.d.xx': 'adxx', 'a.e': 'ae', 'b.d.e.s.e':'bdese', 'a.v.d':'avd', 'b.d.e.b':'bdeb' } let ret = {}; //保存最终结果的对象。 function convert(option) { for(var i in option) { let value...

Below is my answer, tested and it is working fine. ``` type Flatten = T extends [infer First, ...infer Rest] ? First extends any[] ? [...Flatten, ...Flatten] : [First, ...Flatten]...