Leetcode-JavaScript/Reverse Integer.js at master · parshva45/Leetcode-JavaScript · GitHub

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/*Given a 32-bit signed integer, reverse digits of an integer.

Example 1:

Input: 123

Output: 321

Example 2:

Input: -123

Output: -321

Example 3:

Input: 120

Output: 21

Note:

Assume we are dealing with an environment which could only hold integers within

the 32-bit signed integer range. For the purpose of this problem,

assume that your function returns 0 when the reversed integer overflows.*/

/**

* @param {number} x

* @return {number}

var reverse = function(x) {

var isNeg = x>0 ? false : true

x = Math.abs(x)

var str = x.toString()

str = str.split('').reverse()

ans = Number.parseInt((isNeg?'-':'')+str.join(''))

return ans <= Math.pow(2,31)-1 && ans > -Math.pow(2,31) ? ans : 0

};

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