Learn the basics of Ruby with hands-on practice.

Become a Ruby Professional

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!
This introductory module 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!

Learn Ruby from Scratch

## Problem statement
We have a nested hash called `dictionary` that contains other hashes as stored values. We also have a symbol called `key`. Your task is to return the keys stored in the hash that’s stored against the `key`.


### Example
```ruby
dictionary = {  :de => { :one => 'eins', :two => 'zwei', :three => 'drei' },  :en => { :one => 'one', :two => 'two', :three => 'three' },  :es => { :one => 'uno', :two => 'dos', :three => 'tres' }}

Input key = :en

Expected Output: [:one, :two, :three]

```


# Problem statement
We have a nested hash called `dictionary` that contains other hashes as stored values. We also have a symbol called `key`. Your task is to return the keys stored in the hash that’s stored against the `key`.


## Example
```ruby
dictionary = {  :de => { :one => 'eins', :two => 'zwei', :three => 'drei' },  :en => { :one => 'one', :two => 'two', :three => 'three' },  :es => { :one => 'uno', :two => 'dos', :three => 'tres' }}

Input key = :en

Expected Output: [:one, :two, :three]

```


Practice retrieving hash data stored inside another hash.


Exercise 3: Nested Hash

Practice retrieving hash data stored inside another hash.

The Big Picture

Variables

Built-in Class: Numeric

Built-in Class: String

Built-in Classes: TrueClass, FalseClass and NILClass

Built-in Class: Symbol

Built-in Class: Array

Built-in Class: Hash

Objects

Methods

Operators are Methods

Blocks

Get Ready for some more Drill!

Conditionals

Coding Challenge: Truthiness and Equivalence

Lets run another lap with hashes

Writing Classes

Mini project 1

Spotlight on Things Unremarked

Advanced Topics

Your Toolkit!

Appendix: Mailbox Project Prerequisite

Conclusion

Exercise 2: Nested Hash

Problem statement