Problem Description:
Given a 32-bit signed integer, reverse digits of an integer in JavaScript.
Example 1:
- Input: 123
- Output: 321
Example 2:
Input: -123
Output: -321
Example 3:
Input: 120
Output: 21
Note: It should return zero when it reaches out of limit [−2 ^31, 2 ^31 − 1]
My implementation
var reverse = function (x) {
var minRange = Math.pow(-2, 31)
var maxRange = Math.pow(2, 31) - 1
var isNegative = false;
if (x < 0) {
isNegative = true;
x = (x - x - x);
}
var result = Number(x.toString().split('').reverse().join(''));
(isNegative) ? result = (result - result - result) : result;
if (result < minRange || result > maxRange) {
return 0
} else {
return result;
}
};
Please help to improve.
