leet-code/461/solution.js

/**
 * @param {number} x
 * @param {number} y
 * @return {number}
 */

function countOnesBits(x) {
    var result = 0;

    while (x > 0) {
        if (x % 2 === 1) {
            result++;
        }

        x = x >> 1;
    }

    return result;
}

function hammingDistance(x, y) {
    return countOnesBits(x ^ y);
}