solve: top k frequent elements

Author: JustHm

top-k-frequent-elements/JustHm.swift

@@ -0,0 +1,9 @@
+class Solution {
+    func topKFrequent(_ nums: [Int], _ k: Int) -> [Int] {
+        var dict = [Int: Int]()
+        for num in nums {
+            dict[num, default: 0] += 1
+        }
+        return [Int](dict.sorted{$0.value > $1.value}.map{$0.key}[..<k])
+    }
+}