Apply Today to our Software Engineering Program & check out our scholarships!

Back to Setup Page

Build Your Own Class

Now that we have an understanding of OOP and have used some Ruby syntax to write classes and create objects from them, we are ready to write a program that generates many instances of a class!

For this final section, you will choose the pace at which you want to work and the level of support you get. Read through the three options below and select the one you feel most comfortable and excited about:

Mild 🔥

You will get starter code and some step-by-step directions that walk you through what to do and why you're doing it.

This is your starter kit.

Medium 🔥🔥

You will get some starter code and some direction on what to add to it, but will be pushed to apply all of today's learning without explicit direction at times.

This is your starter kit.

Spicy 🔥🔥🔥

You will not have any starter code for this option. Choose your own topic to make a class and instances of that class.

There is no starter kit; create a new on your own!


In Ruby (and other proramming languages), we have ways to store a collection of data. One way is by using what we call an array. We can think of it like a list!

Here’s an example of an array of numbers:

numbers = [1, 3, 5, 7, 9]
p numbers

If you’d like to print out all your sentences with one line of code, one way to do that is by storing them in an array. A couple changes were made from our original code in order to write this solution.

class Message
  def initialize(recipient)
    @recipient = recipient

  def create_message
    "To #{@recipient}: Hello!"

mom ="Mom")
bff ="BFF")

messages = [

puts messages

In OOP, it is common to store instances in a list, or array, like the one above.

Wrap Up