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 a palindrome while 123 is not.
정수 x가 주어지면 x가 회문 정수이면 true를 반환합니다. 정수는 정방향과 역방향이 같을 때 회문입니다. 예를 들어, 121은 회문이지만 123은 그렇지 않습니다.
Example
Example 1:
Input: x = 121
Output: true
Explanation: 121 reads as 121 from left to right and from right to left.
Example 2:
Input: x = -121
Output: false
Explanation: From left to right, it reads -121. From right to left, it becomes 121-. Therefore it is not a palindrome.
Example 3:
Input: x = 10
Output: false
Explanation: Reads 01 from right to left. Therefore it is not a palindrome.
Constraints:
-231 <= x <= 231 - 1
풀이
/**
* @param {number} x
* @return {boolean}
*/
var isPalindrome = function(x) {
return x === +((x + '').split('').reverse().join(''));
};
