Learn the implementation of built-in Ruby classes and explore key features like Ruby strings, Ruby arrays, and Ruby hash to build efficient and organized Ruby applications.

Become a Ruby Developer

The Ruby programming language offers a wide range of built-in classes that provide methods and functionalities to perform various tasks. This module focuses on essential Ruby classes like Ruby strings, Ruby arrays, and Ruby hash, and demonstrates their application in real-world scenarios. Through this practical guide, you'll learn how to use these built-in classes to manipulate data effectively. The module begins with an introduction to each class and its methods, followed by hands-on examples showcasing their usage in solving common programming tasks.

Ruby Classes

## Quiz scenario

Consider a hash named `dictionary` that’s defined as follows:


```ruby
dictionary = {
:one => 'uno',
:two => 'dos',
:three => 'tres'
}
```


Answer the following questions about this hash.



# Quiz scenario

Consider a hash named `dictionary` that’s defined as follows:


```ruby
dictionary = {
:one => 'uno',
:two => 'dos',
:three => 'tres'
}
```


Answer the following questions about this hash.



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

Conclusion

Quiz on Hashes

Quiz scenario