Now that you have gone through the Metaprogramming introduction section, let's see how to integrate it into a custom class in Ruby.
To start, let's create an empty Baseball class:
class Baseball
end
Now, we instantiate it and call a method using the following code:
p Baseball.new.swing
You'll get an error, and this is good because we don't have a method called swing in the Baseball class.
In a later lesson, we'll walk through the process of creating methods on the fly, but right now, let's simply open the Baseball class and add the method manually:
class Baseball
end
class Baseball
def swing
"Homerun"
end
end
p Baseball.new.swing
If you run this program, it will return the "Homerun" message. This example shows the flexibility that Ruby offers when you want to reopen...