[hozzijeong] week01 solutions

top-k-frequent-elements/hozzijeong.js

@@ -0,0 +1,25 @@
+/**
+ * @param {number[]} nums
+ * @param {number} k
+ * @return {number[]}
+ */
+var topKFrequent = function(nums, k) {
+    const numsMap = new Map();
+
+    for(const num of nums){
+        const currentNums = numsMap.get(num);
+
+        if(!currentNums){
+            numsMap.set(num, 1);
+            continue;
+        }
+
+        numsMap.set(num, currentNums + 1)
+    }
+
+    const sortedNums = [...numsMap].sort((a,b) => b[1] - a[1]);
+
+    const frequencyNums = sortedNums.map(([num])=> num);
+
+    return frequencyNums.slice(0,k);
+};