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A lot of Ruby code is "magic". We'll explain the magic and see how it works using the powerful tools Ruby gives us.

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Accept subscription and one-time payments with Stripe in your Rails apps

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Expert advice on keeping Rails apps organized and fast.

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Learn how to build fast, modern web apps with HTML over the wire.

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A few of the Open Source projects we do at GoRails.

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11m

How to use CodeMirror with ImportMaps

Apr 07, 2025

Learn how to use the CodeMirror editor in your browser using Importmaps.

0
11m

Refactoring Madmin Pagination

Mar 31, 2025 Pro

In this lesson, we dive into the Pagy source code to learn how to best refactor pagination inside of our own code.

0
17m

A Simpler Build with Broadcasts Refreshes

Mar 26, 2025 Pro

In this episode, we refactor our code to use broadcasts_refreshes to get an extremely simplified version of a chat application.

2
21m

Stimulus Autoscroll and Broadcasting Messages

Mar 10, 2025 Pro

We handle scrolling the most recent message into view upon page load along with any new messages that come through while on the page. We also broadcast new messages so everyone stays up to date.

6
23m

Message Form Handling with Stimulus

Mar 03, 2025 Pro

We take care of submitting a message without having to click the form button, and fix an issue we create in doing so around replacing the form. We end with planning our next steps.

9
24m

Handling New Messages with Turbo Streams

Feb 24, 2025 Pro

We explore the base application and create a turbo stream to append messages and reset the form. We then identify limitations in this approach, and outline necessary improvements for upcoming episodes.

8
5m

Structured Output with Gemini 2.0

Feb 17, 2025 Pro

Like many AI models, Gemini 2.0 can respond with structured output in a JSON schema that you provide in your request. This is incredibly handy for making integrations that don't have to rely on parsing a blob of text.

3
15m

AI Summaries in Rails with Gemini 2.0

Feb 10, 2025 Pro

AI summaries are in every application these days. In this lesson, we'll use Google's new Gemini 2.0 AI model and API to generate summaries of text that we can use in any Ruby or Rails app.

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
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
9m

Local SSL Certificates with Caddy

Jan 21, 2025 Pro

Ever needed SSL in your development environment? Learn how to configure SSL for local development with Caddy

12
8m

How to use params.expect in Rails 8+

Jan 14, 2025

Rails 8 introduces a new expect method for permitting parameters that fixes a few of the issues with require and permit. Let's take a look!

4
10m

How to use HTML Button Form Attributes

Jan 06, 2025 Pro

HTML provides some handy attributes for buttons to target specific forms on the page. Learn how to use them to improve your Rails application forms.

7
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
12m

Live Reloading with Hotwire Spark

Dec 23, 2024

Hotwire Spark is a new live reloading tool for Hotwire applications that uses morphing to update the page smoothly.

4
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
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
26m

Adding Sales to the black_friday gem

Dec 02, 2024 Pro

Calculating dates is helpful, but what if we took the black_friday gem a step further by adding sales?

0
26m

Creating a Ruby Gem for Black Friday sales

Nov 25, 2024

Black Friday is a popular shopping holiday every year. In this lesson, we'll build a Ruby gem to help automate our Black Friday sales each year.

5
24m

Adding Bluesky Delivery Method To The Noticed Gem

Nov 18, 2024 Pro

Adding delivery methods for notifications with Noticed is pretty easy. Today we'll look at using Bluesky's API to deliver notifications as posts on our feed.

1
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