MajorityElement.js

/**
 * @param {number[]} nums
 * @return {number}
 */
var majorityElement = function(nums) {
    let count = 0;
    let candidate;
    
    nums.forEach((num) => {
        if(count === 0) candidate = num;
        count += (num === candidate) ? 1 : -1;
    });
    
    return candidate;
};