Learn the basics of SQL using the PostgreSQL database

Learn how to use a PMS5003 air quality sensor with Ruby on the Raspberry Pi. We'll use this to monitor air quality and gather data.

Learn about the ActionController Parameters with_defaults method to clean up your params in your Rails applications

Overriding the Confirm method in Turbolinks and Hotwire has been pretty tricky until now. Using promises, Turbo can now wait until the user has submitted the confirm modal.

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.

A command palette is a common feature for power users. Learn how to add a command palette to your Ruby on Rails app using the Ninja Keys web component.

In this video, we will take a look at how to use a few association declaration options to build a couple of has_one associations off of a has_many association in Rails.

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.

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

CSS Variables or CSS custom properties allow you to define variables that can be used throughout your CSS to change properties and their values dynamically. It's a wonderful feature for allowing users to customize the look of your website.