top-k-frequent-elements solution

Author: froggy1014

top-k-frequent-elements/froggy1014.js

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+/**
+ * @param {number[]} nums
+ * @param {number} k
+ * @return {number[]}
+ */
+var topKFrequent = function (nums, k) {
+  const map = new Map();
+  for (let n = 0; n < nums.length; n++) {
+    map.has(nums[n])
+      ? map.set(nums[n], map.get(nums[n]) + 1)
+      : map.set(nums[n], 1);
+  }
+
+  return Array.from(map.entries())
+    .sort(([key1, value1], [key2, value2]) => value2 - value1)
+    .slice(0, k)
+    .map((v) => v[0]);
+};
+
+console.log(topKFrequent([1, 1, 1, 2, 2, 3], 2));