top-k-frequent-elements solution

Author: yuhyeon99

top-k-frequent-elements/yuhyeon99.js

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+/**
+ * @param {number[]} nums
+ * @param {number} k
+ * @return {number[]}
+ */
+var topKFrequent = function(nums, k) {
+    var dict = {};
+    var sortTable = [];
+    for(let i = 0; i < nums.length; i ++) {
+        dict[nums[i]] = dict[nums[i]] ? dict[nums[i]] + 1 : 1;
+    }
+    
+    for(let ele in dict) {
+        sortTable.push([ele, dict[ele]]);
+    }
+    sortTable.sort((a, b) => {
+        return b[1] - a[1];
+    });
+
+    return sortTable.slice(0, k).map(e => Number(e[0]))
+};