Latest Free Screencasts

Generating PDFs in plain Ruby can be a lot of work. Instead, consider generating PDFs from HTML using PDFKit. Watch this screencast

Every good project needs a good setup. In this episode, I set up a github repo, create a new rails application, hook in Cucumber and Rspec, write a Cucumber feature, and write the code to make it pass. Watch this screencast

Launching a new series: URLAgg updates. We upgrade URLAgg to the latest gems and migrate from using config.gem to Gem Bundler. Watch this screencast

Maintainability of your code can be measured in many different ways. Jake Scruggs has combined several of the tools that measure you code into one Ruby Gem: metric_fu. Here’s a demonstration. Go check it out! Watch this screencast

Rails 3 revolutionizes gem dependency management by including a new library called Bundler. This new system supersedes the old config.gem system that was built in to Rails 2. It provides all of the functionality of that system and a lot more — now you can be confident that the gems... Watch this screencast

RVM is a program that allows you to install and manage multiple versions of Ruby and Gems. This setup is ideal for testing your application or gem (library) against multiple versions of Ruby. Also, if you’re looking into Rails 3 on Ruby 1.9 this is a great way to try it out. Are you thinking [...] Watch this screencast

Loading multiple Ruby Gems can result in runtime errors when an incompatible version of a gem dependency is already loaded as a dependency of another gem. Gem bundler can also pre-load and cache gems for faster loading. Having two gems that require different versions of the same dependency can sometimes cause runtime errors. Yehuda Katz [...] Watch this screencast

Bundler is the way to manage gem dependencies in Rails 3.0. Learn how to install gems and lock them down in this episode. Watch this screencast

Scott Motte introduces us to the document-oriented database MongoDB and shows how to use MongoDB as an alternative to MySQL and ActiveRecord using the MongoMapper gem. This talk was part of the DjangoSD/SD Ruby mashup meeting. Bonus content: download the slides from this talk. Watch this screencast

CanCan is a simple authorization plugin that offers a lot off flexibility. See how to use it in this episode. Watch this screencast