Ruby Language

Learn how to enable the experimental new Just-in-time compiler for Ruby 2.6

7

Ruby's Array() and Array.wrap

Jul 30, 2019

Learn how to remove conditionals and make your code simpler and more reliable using Ruby and ActiveSupport's Array wrap methods

3

11m

Ruby Module Include Tracking

Apr 19, 2020 Pro

Sometimes you might want to keep track of all classes a module was included in. We can do that with a couple nifty tricks to make this work with both regular Ruby modules and Rails concerns.

7

10m

Symbols vs Strings

Feb 14, 2019

Ever wondered what the difference between Symbols and Strings were? Why would we use one over the other when most languages only have strings?

16

8m

Sometimes you may need to wrap and reraise an exception. Ruby 2.1+ makes this easy by letting us raise a new error, pass in the old one, and automatically assigns the exceptions "cause" which is the original exception.

3

8m

How to use "ensure" in Ruby

Mar 14, 2022 Pro

Using ensure with blocks is extremely helpful for cleaning up things. We'll learn how to use ensure in Ruby for cleaning up open files as well as temporarily changing values for requests or test stubs.

4

19m

Flattening Scopes in Ruby

Apr 05, 2022

In this video, we will look at how to use blocks and bindings in Ruby to pass local variables across different scopes.

4

23m

Concept Application: Assert Difference Deep Dive

Apr 25, 2022

In this video, we will explore how the concepts we looked at in "Flattening Scopes in Ruby" are used in Rails by taking a look at the assert_difference method. We will walk through how the method works while taking note of where the concepts are applied.

0

15m

Eigenclasses

May 30, 2022 Pro

In this episode, we will be looking into Ruby's eigenclasses or singleton classes. We will first look at singleton methods and then how we can access the eigenclasses of objects.

11

21m

Your First Ruby Gem

Oct 24, 2022

In this episode, we will create our first Ruby Gem. It will be a very simplified gem that adds a method to the built-in Ruby Array class. The goal is to understand the core pieces of what is needed to create a gem that we can share with the community.

8

24m

Your First Ruby Gem Part 2

Nov 07, 2022

In this follow-up episode on building your first Ruby gem, we look at setting up version control, adding a basic testing setup, and adding a basic GitHub action for a CI (continuous integration) setup. With these pieces in place, we should have a solid fo

2

33m

Syncing Repositories with Ruby Scripts - Part 1

Dec 18, 2023

In this lesson, we will be looking at getting a v1 of a Ruby script that will fetch, pull, and push across several repositories and remotes to keep our code up-to-date. Hopefully, it will give you ideas for other areas in your workflow where a simple Ruby

8

21m

Building Utilities with Ruby Scripts

Dec 19, 2022

In this episode, we look at how to get started making utility programs with Ruby similar to the built in cat and grep programs.

3

8m

Debugging with Caller

Dec 12, 2022

Debugging Ruby with the Caller method

2

14m

The Ruby Subscript Operator

Jan 09, 2023 Pro

Rails uses the Ruby subscript operator to implement versioning with ActiveRecord Migrations. We'll learn how this works and implement it from scratch to see how it all ties together

6

4m

Bundler's New Ruby Version File Option

Aug 18, 2023

Bundler 2.4.19 introduces a new "file:" option for specifying the Ruby version file. This makes it easy for you to have a single point of truth for your Ruby version file.

2

13m

The Behaviors Of Super

Oct 13, 2023 Pro

In this lesson, we will look at the various ways we can use the super keyword in Ruby in regard to forwarding method arguments to the equivalent method in a parent class.

2

8m

Linux Signal Trapping in Ruby

Dec 11, 2023 Pro

Catching signals from the operating system like Ctrl-C can be very useful for safely shutting down your Ruby process. In this lesson, we'll see how the Rails server catches Ctrl-C and gracefully shuts down.

0

37m

Syncing Repositories with Ruby Scripts - Part 2

Dec 25, 2023

In this lesson, we will pick up where we left off in the last part and package up our script into a gem that we can share. Along the way, we'll look at how we can spread responsibility across a few small classes to separate concerns and hopefully make the

0

17m

What's New In Ruby 3.3

Dec 25, 2023

Ruby 3.3.0 was released today and this lesson we're diving into the goodies included in the new version.

10

12m

Modular Code Organization

Dec 26, 2022

In this episode, we will look at an option for beginning to refactor your code architecture to use modules as a first step to potentially extracting a new class.

6

11m

Solving FizzBuzz in Ruby

Jul 04, 2016

See how different approaches can affect the code you write using FizzBuzz as an example

17

5m

Limiting & Clamping Values in Ruby

May 27, 2024

Sometimes you need user input to be restricted to a certain range or limited like "greater than zero". While you can do this with conditionals, there are some useful tricks to do this better in Ruby.

1

5m

FILE, dir, and Symlinks

Aug 05, 2024 Pro

Ruby's __FILE__ and __dir__ work slightly differently with symlinks that you might not realize. Let's check see how it works.

0

18m

Parsing Markdown Code Line Highlighting with Ruby

Dec 09, 2024 Pro

We needed a feature to highlight lines in Markdown code blocks for the Rails guides. This is a fun Ruby challenge with many different solutions.

2

11m

Frozen String Literals in Ruby 3.4

Dec 16, 2024 Pro

Ruby 3.4 now raises warnings anytime you mutate a string literal. Learn how to fix our code and use frozen string literals to improve performance.

1

9m

What is 'it' in Ruby 3.4

Dec 30, 2024

Ruby 3.4 added 'it' to reference a block parameter with no variable name. Let's check it out!

0

7m

Hash Fetch with Default Value

Jan 27, 2025 Pro

In this screencast, we explore Ruby's Hash#fetch method and how it handles default values. We show how providing a direct default value vs a block affects performance, especially important in Rails apps where unnecessary operations can impact speed.

6

12m

Lazy Requiring Dependencies in Ruby

Feb 03, 2025 Pro

Normally, we require dependencies at the top of files, but today we'll see where and when we might want to lazily require dependencies.

8

11m

How to use Enumerable with Ruby Classes

Jun 02, 2025

Enumerable provides a suite of sorting, filtering, iterating functionality to any collection class in Ruby. It's easy to implement and use, so let's see how to use it.

2

9m

Thread Safety with Mutexes in Ruby

Jul 21, 2025 Pro

Thread safety can be tricky, so let's explore what can happen if our code isn't thread safe before diving into a real-world example where a mutex plays an important role in keeping a gem thread safe.

7

13m

Ruby Data Class

Aug 11, 2025 Pro

In this episode, we will look at Ruby's Data class which provides a way to define simple classes for value-alike objects.

3

16m

Ruby Pattern Matching

Aug 18, 2025

In this episode, we will be looking at pattern matching in Ruby which lets you check the structure of data and save parts of it into variables.

3

25m

Morse Code with Ruby - Part 1

Sep 01, 2025 Pro

In this lesson, we will start building a Ruby project to translate text to morse code and vice versa.

2

17m

Morse Code with Ruby - Part 2

Sep 08, 2025 Pro

In this lesson, we will pick up where we left off in the last video in this project and add the ability to play morse code audio.

1

6m

Ruby Module Function Method

Sep 29, 2025 Pro

In this lesson, we will look at the Module#module_function method in Ruby which allows you to call methods defined in a module with the module as a receiver.

9

20m

Parsing Ruby with Prism

Nov 03, 2025 Pro

How does Ruby run your Ruby code? In this episode we will start to dip our toes into understanding what happens along the way on your codes journey to being run.

2

4m

Module extend self

Nov 17, 2025

Using extend self inside a Ruby module makes all of its instance methods callable directly on the module itself, which is useful when you want a collection of utility-style methods without needing to instantiate an object.

4

11m

Ruby's Tap Method

Jan 05, 2026 Pro

The tap method in Ruby feels strange at first, but is one of my favorite tools for writing clean code. It can help eliminate local variables and make chaining things together super easy.

6

How to use the Ruby 2.6 Just-in-Time (JIT) Compiler

Dec 28, 2018

Ruby's Array() and Array.wrap

Jul 30, 2019

Ruby Module Include Tracking

Apr 19, 2020 Pro

Symbols vs Strings

Feb 14, 2019

Wrapping Exceptions in Ruby

Mar 31, 2021 Pro

How to use "ensure" in Ruby

Mar 14, 2022 Pro

Flattening Scopes in Ruby

Apr 05, 2022

Concept Application: Assert Difference Deep Dive

Apr 25, 2022

Eigenclasses

May 30, 2022 Pro

Your First Ruby Gem

Oct 24, 2022

Your First Ruby Gem Part 2

Nov 07, 2022

Syncing Repositories with Ruby Scripts - Part 1

Dec 18, 2023

Building Utilities with Ruby Scripts

Dec 19, 2022

Debugging with Caller

Dec 12, 2022

The Ruby Subscript Operator

Jan 09, 2023 Pro

Bundler's New Ruby Version File Option

Aug 18, 2023

The Behaviors Of Super

Oct 13, 2023 Pro

Linux Signal Trapping in Ruby

Dec 11, 2023 Pro

Syncing Repositories with Ruby Scripts - Part 2

Dec 25, 2023

What's New In Ruby 3.3

Dec 25, 2023

Modular Code Organization

Dec 26, 2022

Solving FizzBuzz in Ruby

Jul 04, 2016

Limiting & Clamping Values in Ruby

May 27, 2024

__FILE__, __dir__, and Symlinks

Aug 05, 2024 Pro

Parsing Markdown Code Line Highlighting with Ruby

Dec 09, 2024 Pro

Frozen String Literals in Ruby 3.4

Dec 16, 2024 Pro

What is 'it' in Ruby 3.4

Dec 30, 2024

Hash Fetch with Default Value

Jan 27, 2025 Pro

Lazy Requiring Dependencies in Ruby

Feb 03, 2025 Pro

How to use Enumerable with Ruby Classes

Jun 02, 2025

Thread Safety with Mutexes in Ruby

Jul 21, 2025 Pro

Ruby Data Class

Aug 11, 2025 Pro

Ruby Pattern Matching

Aug 18, 2025

Morse Code with Ruby - Part 1

Sep 01, 2025 Pro

Morse Code with Ruby - Part 2

Sep 08, 2025 Pro

Ruby Module Function Method

Sep 29, 2025 Pro

Parsing Ruby with Prism

Nov 03, 2025 Pro

Module extend self

Nov 17, 2025

Ruby's Tap Method

Jan 05, 2026 Pro

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FILE, dir, and Symlinks