Solution Two Sum

Author: doitduri

two-sum/doitduri.swift

@@ -0,0 +1,16 @@
+class Solution {
+    func twoSum(_ nums: [Int], _ target: Int) -> [Int] {
+        let dict = nums.enumerated().reduce(into: [Int: Int]()) { initialValue, num in
+            initialValue[num.element] = num.offset
+        }
+        
+        for startIndex in 0..<nums.count {
+            let findValue = target - nums[startIndex]
+            if let endIndex = dict[findValue], startIndex != endIndex {
+                return [startIndex, endIndex]
+            }
+        }
+        
+        return []
+    }
+}