Become a Ruby Professional

This module provides a thorough explanation of modern concepts for beginners. 
Beginners will get a refresher on Ruby. Those who’re already familiar with the language will rediscover object-oriented concepts, memory organization, find career advice, and save the planet from a nuclear apocalypse.
Let's tune in!

The Handbook for Ruby Developers

## Problem statement #1
In the code widget below, write a method to calculate the number of zeros in the array by passing a block to the `count` method.


## Example
```ruby
array1 = [0,1,1,0,0]
result = 3
```
Let’s try it for ourselves, before looking at the solution.


# Problem statement #1
In the code widget below, write a method to calculate the number of zeros in the array by passing a block to the `count` method.


# Example
```ruby
array1 = [0,1,1,0,0]
result = 3
```
Let’s try it for ourselves, before looking at the solution.


Let's solve some exercises on arrays before moving onto the next chapter.

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

Appendix

Conclusion

Exercise: Arrays

Problem statement #1

Example