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

## Iterators are chainable

Methods on arrays and hashes that take a block are also called **iterators**.
We say they iterate over the array, meaning that these methods take each element of the array and do something with it. In Ruby, iterators are chainable, adding functionality on top of each other.

That means that if we don’t pass a block to an iterator method, such as `each`, `collect`, or `select`, then we’ll get an iterator object back. We can then call more methods on these iterator objects and finally pass a block, like so:

# Iterators are chainable

Methods on arrays and hashes that take a block are also called **iterators**.
We say they iterate over the array, meaning that these methods take each element of the array and do something with it. In Ruby, iterators are chainable, adding functionality on top of each other.

That means that if we don’t pass a block to an iterator method, such as `each`, `collect`, or `select`, then we’ll get an iterator object back. We can then call more methods on these iterator objects and finally pass a block, like so:

Learn about iterators in Ruby and how they can be chainable.

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

Iterators

Iterators are chainable