Magic Methods from method_missing

But do you actually have to write all of those methods? Not really: All you need is method_missing. Think about what method_missing does: It lets you know that someone is trying to call a method on your object, a method that does not actually exist. In the last couple of chapters we’ve seen how you can use method_missing to deal with programming errors and to help with delegation. Another thing you can do with method_missing is try to figure out what the user is asking you to do and actually do it. What if, whenever someone called a nonexistent method on one of your FormLetter objects, you looked at the method name to see whether you could make sense out of it? If you can, you do the right thing. If not, there is always NameException to raise.

Here is that idea in code: