Linear Search updated to Swift 4

Author: shabirjan

Linear Search/LinearSearch.playground/Contents.swift

@@ -1,10 +1,15 @@
 //: Playground - noun: a place where people can play
 
+// last checked with Xcode 4.0b4
+#if swift(>=4.0)
+print("Hello, Swift 4!")
+#endif
+
 func linearSearch<T: Equatable>(_ array: [T], _ object: T) -> Int? {
-  for (index, obj) in array.enumerated() where obj == object {
-    return index
-  }
-  return nil
+    for (index, obj) in array.enumerated() where obj == object {
+        return index
+    }
+    return nil
 }
 
 let array = [5, 2, 4, 7]