Majority element [https://leetcode.com/problems/majority-element]

majority_element.js

/**
 * @param {number[]} nums
 * @return {number}
 */
var majorityElement = function(nums) {
    let occurrences = 1;
    let majorityNumber = nums[0];

    for (let i = 1; i < nums.length; i++) {
        if (nums[i] === majorityNumber) {
            occurrences++;
            continue;
        }

        occurrences--;

        if (!occurrences) {
            occurrences = 1;
            majorityNumber = nums[i];
        }
    }

    return majorityNumber;
};