rubytarball.tar.gz

Do you want to be an interpreted language geek? Are you tired of getting entangled in the dense syntaxes? Does it irritate you to compile your code to machine language first? Are you looking for an easy-to-use scripting language? Well, Ruby is the best pick for you then!

Ruby is a smart, easy-to-use, functional, Object-Oriented programming language, which comes as a wondrous mix of Perl's scripting power, Pythonic capabilities and much more! As Matsumoto, creator of Ruby, implies: "I hope to see Ruby help every programmer in the world to be productive, and to enjoy programming, and to be happy. That is the primary purpose of Ruby language."

This introductory course will be providing you with hands-on practice with the support of a bunch of interactive illustrations, exercises and the integral topics of variables, built-in classes, objects, conditionals, blocks and much more!

Cool, right? Ready to dive into one of the most influential and demanding third generation programming language? Let's tune in!

Ruby: An Amateur's Pitch

Remember how we said that **instance variables store data that is "private" to
the object?** 
>▶️ Instance variables are only made accessible to the outside world
(we say "it is exposed") if we add attribute accessors to the class.

In the same way, classes sometimes want to keep certain methods private: methods
that aren't supposed to be called from outside of the object. Only the object
itself is supposed to use them internally, from other methods.

Imagine I am an instance of a class `ItalianRestaurant`, and I have a method
`pizza`, which is supposed to return an instance of the class `Pizza`.

| 🍕 | When you approach me and call the method `pizza` (i.e. ask me to bring a pizza) then I'll know what to do, and how to do it. I'll get some prepared pizza dough from somewhere, some tomato sauce, vegetables and other stuff from somewhere else, prepare the pizza, bake it, put it on a nice plate, and finally give (return) it to you. |
| --- | --- |

| 👣 | However, you don't really care about any of these details. You are hungry and just want the pizza. All the exact steps involved are something that I keep private to me, and maybe they've been our family's best-kept secret for generations. |
| --- | --- |



# This is pretty much how objects work, too! 
The Italian restaurant object
exposes some stuff to the outer world (you), and keeps other things private.
They'll let you order a pizza, and other things. But they won't tell you the
exact ingredients of their tomato sauce, or how they manage to make this
great pizza dough.

In our `Person` example it makes sense to make the method `encrypt` private.

Currently, if you run the following code it will execute just fine, even though
it makes little sense:

```ruby

```

This lesson briefs on why and how to make methods private.

Private Methods