6 - 9. Palindrome Number

https://leetcode.com/problems/palindrome-number/

var isPalindrome = function(x) {
    if (x < 0) return false;
    
    let arr = x.toString().split('');
    let halfArr = arr.slice(0, Math.floor(arr.length / 2));
    
    return halfArr.every((item, index) => item === arr[arr.length - 1 - index]);
    
};

we can reverse number then check with given number

var isPalindrome = function(x) {
    if (x < 0) return false;
    
    let result = 0;
    for (let i = x; i >= 1; i = Math.floor(i / 10)) {
        result = result * 10 + i % 10;
    }
    
    return x === result;
};

using some api with Array

 var isPalindrome = function (x) {
  x = x.toString().split('');

  while (x.length > 1) {
    if (x.pop() !== x.shift()) {
      return false;
    }
  }

  return true;
};