gistfile1.txt

Seeing a language-specific explanation of OOP can make the abstract parts easier to grasp. We’ll therefore proceed to some Ruby code. We’ll create a new object. It won’t represent or model anything specific, like a house or a book or a teacher; it will be a generic object:

obj = Object.new

Now you have an object and a variable through which you can address it.

DEFINING AN OBJECT’S BEHAVIOR
Let’s say you’ve created an object and you want it to do something interesting: you want it to talk. To get it to talk, you have to ask it to talk. But before you ask it to talk, you have to teach it how to talk.
Specifically, and more technically, you have to define a method for your object. You do this using a special term—a keyword—namely, the keyword def.
Here’s how to define the method talk for the object obj:

def obj.talk
puts "I am an object." puts "(Do you object?)"
end