solutions/0009-palindrome-number.js

/**
 * 9. Palindrome Number
 * https://leetcode.com/problems/palindrome-number/
 * Difficulty: Easy
 *
 * 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.
 */

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