top-k-frequent-elements solution

Author: JangAyeon

top-k-frequent-elements/JangAyeon.js

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+/**
+ * @param {number[]} nums
+ * @param {number} k
+ * @return {number[]}
+ */
+var topKFrequent = function (nums, k) {
+  nums = nums.sort((a, b) => a - b);
+  const counter = new Map();
+  for (let num of nums) {
+    const value = counter.has(num) ? counter.get(num) + 1 : 1;
+    counter.set(num, value);
+  }
+  const sorted = [...counter.entries()].sort((a, b) => b[1] - a[1]);
+  const answer = sorted.slice(0, k).map((item) => item[0]);
+  // console.log(counter, sorted, answer)
+
+  return answer;
+};