Code-1-js

Question 1：

Reverse digits of an integer.Example1:x = 123, return 321 Example2:x = -123, return -321

Note:

The input is assumed to be a 32-bit signed integer. Your function should return 0 when the reversed integer overflows.

---

Answer：

 - method 1：

note：Math.abs, Math.pow；ps: 此方法用字符串处理，有点怪怪的~~但速度较快~~

---

- method 2 ：

note：直接数据运算，但运行速度不够快~~