Gain insights into Ruby development with 78 tasks tailored for beginners and experienced coders. Explore object-oriented concepts, debug programs, and advance your freelance coding career.

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This self-study course written as a book is your first step towards making money by coding and programming from home, and having fun doing it. You will understand how the Ruby language works, and establish a foundation for being a successful freelance developer. This course gives you not only technical detail, but presents knowledge in a friendly format, understandable by all ages, providing a thorough explanation of modern concepts for absolute beginners.

In this course you will find 78 easy to follow tasks, so even people without any programming skill can solve them. Beginners will learn how to create, debug, and understand programs in Ruby. Those who are already familiar with the language will rediscover object-oriented concepts, memory organization, find career advice, and save the planet from a nuclear apocalypse.

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

The Handbook for Ruby Developers

# Initialization
Let’s recall how we initialized arrays and hashes.

**Array:** `arr = []`

**Hash:** `hh = {}`

# Iteration
Let’s see how the iteration works in arrays and hashes.

Here’s an array:

**Array:**
```ruby
arr.each do |element| 
  # ...
end
```
Here’s a hash:
**Hash:**
```ruby
hh.each do |key, value|
  # ...
end
```
Or, here’s a second option for hashes:
```ruby
hh.each_key do |key| 
  # ...
end
```

Learn the differences between hashes and arrays.

Before We Begin

First Steps

Fundamentals of Ruby

Conditional Statements

Operators and Methods

Arrays

Hash

Fun with Object Oriented Programming

Debugging in Ruby

Ruby Version Manager

Testing Ruby Programs

Wrap Up!

Appendix

Comparison of Hashes and Arrays

Initialization

Iteration