Add Func<> equivalent to Execute Action<> Maybe extension

CSharpFunctionalExtensions.Tests/MaybeTests/ExtensionsTests.cs

@@ -156,6 +156,15 @@ public void Execute_executes_action()
             property.Should().Be("Some value");
         }
 
+        [Fact]
+        public void Execute_returns_func_result()
+        {
+            Maybe<MyClass> maybe = new MyClass { Property = "Some value" };
+
+            string property = maybe.Execute(x => x.Property);
+
+            property.Should().Be("Some value");
+        }
 
         private static Maybe<string> GetPropertyIfExists(MyClass myClass)
         {

CSharpFunctionalExtensions/MaybeExtensions.cs

@@ -69,5 +69,14 @@ public static void Execute<T>(this Maybe<T> maybe, Action<T> action)
 
             action(maybe.Value);
         }
+
+        public static TOut Execute<T, TOut>(this Maybe<T> maybe, Func<T, TOut> func)
+            where T : class
+        {
+            if (maybe.HasNoValue)
+                return default(TOut);
+
+            return func(maybe.Value);
+        }
     }
 }