feat: solve new question

Author: arwildo

top-k-frequent-elements/main.js

@@ -0,0 +1,27 @@
+/**
+ * @param {number[]} nums
+ * @param {number} k
+ * @return {number[]}
+
+    nums = [1,1,1,2,2,3], k = 2
+
+    sum = {1: 3,2: 2, 3:1 }
+    return 
+
+ */
+var topKFrequent = function(nums, k) {
+    let map = new Map();
+
+    for (i in nums) {
+        if (map.has(nums[i])){
+            map.set(nums[i], map.get(nums[i]) + 1);
+        } else {
+            map.set(nums[i], 1);
+        }
+    }
+    return [...map.entries()]
+    .sort((a, b) => b[1] - a[1])
+    .slice(0, k)
+    .map(entry => entry[0]); 
+};
+