top-k-frequent-elements solution

Author: 이호찬

top-k-frequent-elements/lhc0506.js

@@ -0,0 +1,14 @@
+/**
+ * @param {number[]} nums
+ * @param {number} k
+ * @return {number[]}
+ */
+var topKFrequent = function(nums, k) {
+    const numsMap = {};
+
+    nums.forEach(num => {
+        numsMap[num] ? numsMap[num] += 1 : numsMap[num] = 1;
+    });
+
+    return Object.entries(numsMap).sort((a, b) => b[1] - a[1]).slice(0, k).map(([key]) => Number(key));
+};