I have a question about setting the target of the Add Employee button to the array controller (on page 137)
I set it to “add:” as specified. And then, on page 152, in dealing with the undo codes, it was mentioned that the add Employees
and Remove buttons would call the “insert:” and “remove:” messages.
So I looked and realized there are both “add:” and “insert:” actions that may be received by the NSArrayController.
I changed to the “insert:” but both seemed to work fine.
Are there any differences?