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A collection of exercises to practice various aspects of Ruby

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Ruby Exercises

This is a collection of exercises to practice various aspects of Ruby.

Practicing in this manner (small, bite-sized problems that you can do repeatedly) is a fantastic way to solidify programming concepts.

Each folder in this repository is a set of related exercises. Open up the folder and read the README to learn more about them.

Structure of this repository

  • Each folder contains a
    file that provides a summary of what skills you will develop with these exercises
  • Each exercise file within the folder will begin with comments providing more detail on:
    1. How you need to manipulate or work with this file to complete the exercise.
    2. Some exercises will require you to manipulate the "current" file and run it. Other exercises will require you to create new files and then reference those files for the "current" file to work.

If you're new here, watch this getting-started video. We'll install the ruby-exercises directory, figure out how to get set up to practice some

, and then we'll work through the complete full exercises:

Intro to ruby-exercises and strings.rb (YouTube)


1. Clone this repository

You don't need to fork this repository; clone it to your laptop

in your

directory on your laptop (or whatever directory you want this repository to live inside of), run:
// using ssh keys
git clone [email protected]:turingschool/ruby-exercises.git
// using https, if the above doesn't work:
git clone

Once this command runs, you'll now have a "local" copy of this entire repository, living right on your laptop.

2. From the command line,
into the

2. Install


gem install bundler
in your terminal

3. From the command line, run
bundle install

You should see something like this:

$ bundle install
Fetching gem metadata from
Using bundler 2.1.4
Fetching coderay 1.1.2
Installing coderay 1.1.2
Fetching method_source 1.0.0
Installing method_source 1.0.0
Fetching minitest 5.2.1
Installing minitest 5.2.1
Fetching pry 0.13.1
Installing pry 0.13.1
Bundle complete! 2 Gemfile dependencies, 5 gems now installed.
Use `bundle info [gemname]` to see where a bundled gem is installed.

If you see that, great!

If you get an error like:

zsh: command not found: bundle

you need to install the

gem. Run:
$ gem install bundler

If this command throws an error, you either: 1. Don't have

installed 2. You've not yet installed a version of Ruby.

Please check that you've followed mod0 setup instructions and this guide to install rbenv and a version of ruby.

Hey, hold up. What is this

thing, and what does it do? what does
gem install bundler

Great question!

is Ruby's package manager. If you want to install extra code that works with Ruby, you'll use
to do it. Once you have the
installed, it is "used" by typing
into your terminal.

It is used in conjunction with the

files you see in this repository, to manage Ruby gems.

Here's an exhaustive amount of information about gems, if you're so inclined:


has run successfully, open up the first test!
$ cd data-types/strings
$ atom .

And read through the
for further instructions!

If you want to view the instructions in your web browser, you can view them here: data-types/strings/

Otherwise, please work through this video guide to fully understand how to run these exercises. They can be mostly self-explanitory, but even if you know exactly how to make these tests pass, you'll gain value from the video.

Suggested order

This repository of exercises is one of the best tools you've got to learn Ruby. Every minute spent here is time very well spent.

  • Week 1

  • Week 2

    • data-types/collections/hashes.rb
    • objects-and-methods/exercise-1
    • mythical-creatures
    • Hobbit video walk-through
    • Pirate
    • Wizard
    • command-query
    • leatherchairtest.rb
    • baby_test.rb
    • beers_test.rb
  • Week 3

    • datatypes/collections/advancednestedcollections.rb video walk-through
    • object-and-methods/exercise-2
    • mythical-creatures
    • Medusa
    • Werewolf
    • Centaur
    • Ogre
    • command-query
    • adult_test.rb
    • rollcalltest.rb
    • wallet_test.rb
  • Week 4+

    • Enumerables/exercises
    • Iteration
    • Command and Query
    • Complete/Redo Mythical Creatures

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