【leetcode】9. Palindrome Number

Determine whether an integer is a palindrome. Do this without extra space.
主要是翻转这个数字，然后看翻转后的结果和原数字是否相同。这样空间的需求是o(l)

/** * @param {number} x * @return {boolean} */var isPalindrome = function(x) {    var num = x;    var reverse = 0;    while(num>=1){        reverse = reverse*10 + num%10;        num = Math.floor(num/10);    }    return reverse===x?true:false;};