Palindrome Number

Determine whether an integer is a palindrome. Do this without extra space.

Tags

Math

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/** * @param {number} x * @return {boolean} */var isPalindrome = function (x) {    if (x < 0) {        return false;    } else if (x >= 0 && x < 10) {        return true;    }    var x_str = x.toString();    var len = x_str.length;    var start = 0, end = len - 1;    while (start <= end) {        if (x_str.charAt(start) === x_str.charAt(end)) {            start++;            end--;        } else {            return false;        }    }    return true;};