Function leastInterval

javascript/0621-task-scheduler.js:8–13

(tasks, n)

 * @return {number}
 */
var leastInterval = function (tasks, n) {
    const frequencyMap = getFrequencyMap(tasks);
    const maxHeap = getMaxHeap(frequencyMap);

    return getMinimumCpuIntervals(maxHeap, n);
};

var getFrequencyMap = (tasks, frequencyMap = new Array(26).fill(0)) => {
    for (const task of tasks) {