top-k-frequent-elements solution

Author: Jaehyeon Robert Han

top-k-frequent-elements/Zioq.js

@@ -0,0 +1,30 @@
+/**
+ * @param {number[]} nums
+ * @param {number} k
+ * @return {number[]}
+ */
+var topKFrequent = function(nums, k) {
+	
+	const map = new Map();
+	let arr = []
+
+	nums.forEach( e => {
+		if(map.has(e)) {
+			let current_value = map.get(e)
+			map.set(e, current_value +1)
+		} else {
+			map.set(e, 1)
+		}
+	})
+	const store = [...map.entries()].sort((a,b) => b[1] - a[1])
+	for( let i = 0 ; i < k && i < store.length ; i++ ) {
+		arr.push(store[i][0])
+	}
+	return arr
+ 
+};
+
+
+/* Test code */
+console.log(topKFrequent([1,1,1,2,2,3],2)); // true
+console.log(topKFrequent([1,2],1)); // true