One of the awesome things about Ruby is that you can over-ride methods you define, or even over-write methods that are built into Ruby.
This may not be unique with Ruby, but you can also over-ride super class methods in your defined subclass and use ‘super’ to execute the logic defined in the super class version of that method.
class ScumbagSteve
def hello
puts "Hey, can I borrow $5."
end
end
class GoodGuyGreg < ScumbagSteve
def hello
super
puts "...I'll pay you back tomorrow with interest."
end
end
>> guy = GoodGuyGreg.new
=> #<GoodGuyGreg:0x100346e70>
>> guy.hello
Hey, can I borrow $5.
...I'll pay you back tomorrow with interest.
=> nil