Enum vs Lambda as a function argument

I have two functions, the first function adds elements to a database, the second deletes the same elements.

To reduce duplicate code, I can implement a generic function in two ways:

// First solution void UpdateDatabase(list, enum operation_type) { for element in list: for properties in element.all_properties(): if properties.valid(): switch (operation_type): case ADD: AddToDatabase(properties); case DELETE: DeleteFromDatabase(properties); // Second solution void UpdateDatabase(list, lambda L) { for element in list: for properties in element.all_properties(): if properties.valid(): L(properties); } 

To use the first solution, I would write:

UpdateDatabase(list, OperationType::ADD); UpdateDatabase(list, OperationType::DELETE); 

To use the second solution, I would write

UpdateDatabase(list, p -> AddToDatabase(p)); UpdateDatabase(list, p -> DeleteFromDatabase(p)); 

which solution is better from the code cleanliness/maintainability point of view? Is there an alternative third solution?