#9 - Palindrome Number

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Problem Description

Given an integer `x`, return `true` if `x` is palindrome integer.

An integer is a palindrome when it reads the same backward as forward.

For example, `121` is palindrome while `123` is not.

Solution

/**
 * @param {number} x
 * @return {boolean}
 */
var isPalindrome = function(x) {
  if (x < 0) return false;
  return +String(x).split('').reverse().join('') === x;
};