🎉 feat: initial commit for leetcode 215 using Swift

Author: liuchuo

Swift/215. Kth Largest Element in an Array.swift

@@ -0,0 +1,7 @@
+// 215. Kth Largest Element in an Array
+// 20 ms, 97.33%
+func findKthLargest(_ nums: [Int], _ k: Int) -> Int {
+    if nums.isEmpty { return 0 }
+    let sn = nums.sorted(by: >)
+    return (k <= sn.count && k > 0) ? sn[k-1] : sn[0]
+}