703.Kth_Largest_Element_in_a_Stream.js

/**
 * @param {number} k
 * @param {number[]} nums
 */
var KthLargest = function (k, nums) {
  this.sortNums = nums;
  this.k = k;
};

/**
 * @param {number} val
 * @return {number}
 */
KthLargest.prototype.add = function (val) {
  this.sortNums.push(val);
  this.sortNums.sort((x, y) => y - x);
  const index = this.k - 1;
  return this.sortNums[index];
};

/**
 * Your KthLargest object will be instantiated and called as such:
 * var obj = new KthLargest(k, nums)
 * var param_1 = obj.add(val)
 */