w01: 347. Top K Frequent Elements

Author: Heeseung Koo

top-k-frequent-elements/nrudev.ts

@@ -0,0 +1,13 @@
+function topKFrequent(nums: number[], k: number): number[] {
+  const map: Map<number, number> = new Map();
+
+  nums.forEach((val) => {
+    if (map.has(val)) map.set(val, map.get(val)!! + 1);
+    else map.set(val, 1);
+  });
+
+  return Array.from(map)
+    .sort((a, b) => b[1] - a[1])
+    .slice(0, k)
+    .map((item) => item[0]);
+}