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- Feed Preview Teach Me To Code » Screencasts
My Podcasting Setup
My Equipment: Mackie PROFX12 12-Channel Compact Effects Mixer with USB Sony MDR7506 Professional Large Diaphragm Headphone Roland R-05 Studio WAVE/MP3 Recorder Transcend 32 GB Class 10 SDHC Flash...
Upgrading JotRod to Rails 3.1.3
When preparing to add some layout features to JotRod, I realized it was a Rails 3.0.9 application. Here's a quick rundown on upgrading to Rails 3.1.3. Download 164.7 MB Download (iPod & iPhone) 3...
Followers and Following
In order to get someone a timeline in JotRod, we need followers and following lists to compile the Jots from. This means that we need to add a new ColumnFamily called Followers and another one ca...
ActiveModel Callbacks
In the Jots (like tweets) in JotRod, I needed to generate a hash on creation as the key for the Jots. So, I determined that the easiest way to do that was to include ActiveModel Callbacks. The mo...
Model Generator
Here's an introduction to creating a Rails connector gem for an ORM with a model generator. Download 352.3 MB Download (iPod & iPhone) 84.7 MB Take the 2011 Readers Survey
Introduction to Sandra: The Cassandra ORM
When I started playing with Cassandra, I wound up writing part of an ORM to get what I needed from it. I want to build actual projects with Rails, Ruby, or other technologies for my videos rather...
Ruby Koans
I’m working on another Cassandra demo, but didn’t have time to finish, so I decided to show you Ruby Koans. It’s a very interesting test-driven approach to learning Ruby. I hope you enjoy i...
Cassandra Basic Schema and Ruby Gem
You can get cassandra at cassandra.apache.org and the ruby gem by running: gem install cassandra I did run into a problem with the trift_client gem when installing. If you get a Load Error, run t...
Create a ‘Like’ or ‘+1′ button with make_flaggable
With the recent release of the Google Plus beta (ask me for an invite if you want one), I felt it appropriate to show a simple way to create a Like or +1 button for your Rails application. The ap...
Building a Star-Rating System in Ruby on Rails with jQuery
Specification Clicking a star rating turns on the stars to the left of the star I clicked. Clicking a star submits the star rating. When I refresh the page, the star ratings should be persistent....
Capistrano: Deploying Ruby on Rails Applications to Multiple Servers
For a basic deployment recipe, check out Basic Deployment with Capistrano This episode demonstrates how to extend deployment to deploy to stage and production. Overall it’s rather simple. All i...
Polymorphism with Many-to-Many Associations – A Teach Me To Code Tutorial
Polymorphic associations are very simple, as are many-to-many associations. When you blend the two, it's not nearly as simple. Since there isn't a working build-in mechanism for many-to-many poly...
Many to Many Associations in Ruby on Rails – A Teach Me To Code Tutorial
I had several requests in UserVoice to provide a Many to Many tutorial in Rails. This is a demonstration of how to put together a "has and belongs to many" association and a "has many through" as...
Acceptance Tests with RSpec and Capybara
On the Ruby Rogues podcast I mentioned that I had moved away from Cucumber to RSpec and Capybara for my integration tests. Here's a demo on how to do some TDD with RSpec and Capybara. Download 18...
CoffeeScript: The Cool Parts
CoffeeScript offers more than nice syntax for setting and managing data and functions. It also offers Classes, Inheritance, access to a 'super' method, Ruby-style string interpolation, easy varia...
Rails 3.1 Beta – Sprockets, CoffeeScript, and JQuery – A Teach Me To Code Tutorial
Ruby on Rails 3.1 is moving to use Sprockets to compile CoffeeScript into JavaScript and include JQuery in it's JavaScript by default. This is a quick demo of how it all hangs together to mana...
CoffeeScript Basics – A Teach Me To Code Tutorial
CoffeeScript is now going to be a default installation with Ruby on Rails. So, I installed CoffeeScript and NodeJS and have been playing with it for the last hour or so. Here are the basics you n...
Single Table Inheritance – Ruby on Rails Tutorial
Single Table Inheritance is a great way to handle related models that descend from the same class. The classic example is a Car class with Ford, Chevy, and Honda subclasses. This Ruby on Rails...
Compass, SASS, and the 960 Grid System – Delicious Clone
In preparing to show off SASS, I found the Compass system, which uses SASS and organizes your stylesheets in a unique way. In this tutorial, I walk you though installing compass, installing the 9...
Creating a Rake Task to Convert ERB to HAML
This is a basic demonstration of adding a rake task to Ruby on Rails. Some of the same principles apply to Rake in general. You also see how to call out to the command line and how to convert ERB...
Creating Bookmarks – Delicious Clone
This is a basic implementation of creating bookmarks for our delicious clone using the Rails built in REST. I also found out that you need the haml-rails gem in order to get your views to gene...
CanCan: Setting Permissions – Delicious Clone
In this installment in the Delicious Clone, we use CanCan to set some permissions on the Bookmarks Controller. Next week, we'll finish the bookmark creation process and the following, we'll add s...
Faster Testing with Parallel Tests
Run your tests faster with parallel_tests gem using all the cores you have on your computer. Download Download (iPhone & iPod)
Switching to HAML – Delicious Clone
This is a quick demonstration of how to switch your Rails 3 application to HAML from ERB.
Setting Up And Testing Devise – Delicious Clone
Because I'm going to be testing in cucumber sections of the site that require a user to be logged in, I decided to get it out of the way. So, in this video, I write a cucumber feature to test log...
Rails 3.0.3 Setup – Delicious Clone
Here is what I've done to create this application: Use the 'rails new' command to create a rails application Set up the Gemfile Configure the Database Install Cucumber Install Rspec Install Devis...
How to Create a Countdown Timer with Javascript
This video demonstrates how to build a countdown timer with the setInterval function in Javascript, a text field, and jQuery to update your text field. Download 70.8 MB Download (iPhone & iPod) 4...
Basic Deployment with Capistrano
Capistrano has been the most popular way to deploy Ruby and Rails applications for a long time. This video provides a quick demonstration of a basic recipe for deploying a Rails 3 application. I ...
Managing Branches with Git
I'm trying something new and using the YouTube player. Let me know if you see any differences. In this video, I demonstrate how to create, merge, and delete local and remote branches in Git. Git ...
OAuth with the Twitter Gem
Twitter just turned off Basic Auth and is forcing application developer to use OAuth. Here is a demonstration of how to add Twitter OAuth to your Ruby on Rails Application. Download 90.9 MB Downl...
Faking Sinatra with Rack and Metaprogramming
Sinatra has a really nice DSL. You can fake the basics of the DSL with some simple Rack middleware created by metaprogramming. If you like the screencasts, please give $5 to help me get to RubyCo...
Rack Basics
Rack is the basis for most major web frameworks in Ruby (like Ruby on Rails.) This video gives a basic overview on how it is used and what features make it a powerful component for Ruby Web Frame...
Rails 3 – Build a Blog – Part 3: Edit and Delete CRUD
This is the continuation of the Rails 3 Build a Blog series. This episode includes implementation of the Edit and Destroy methods on the Posts Controller. There are a lot of things left to cover ...
Rails 3 Documentation: Generate Your Own
In this screencast, I show you how to generate the api and guides for offline viewing. Download 28MB Download iPhone/iPod 7MB
Upgrading Rails 3.0 Beta4 to Rails 3.0 Release Candidate
This video goes over some issues that popped up while upgrading a Rails 3 application to the Release Candidate This video goes over some issues that popped up while upgrading a Rails 3 applicatio...
Ruby’s Enumerable Module: The Inject Method
Quick Ruby Tip: The inject method is useful for aggregating data across a dataset. For example a summation could be done with inject (by aggregating each number into the sum.) Download 49.1 MB Do...
Rails 3 – Building a Blog – Part 2: CRUD Show and Create
The second part of the tutorial for building a blog with Ruby on Rails version 3. We demonstrate how to set up some basic routes, manage the controller and views, and create a basic form for crea...
Rails 3 – Building a Blog – Part 1: Test Setup & Generators
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...
RSpec Matchers
RSpec gives us many powerful tools to make our tests readable. Matchers allow us to provide custom predicates to our should statements that succinctly define the behavior of our code. Download 27...
Ruby Method Name with Spaces
This is an introduction to Ruby metaprogramming where I cover two different ways to define a method. The idea actually started as a joke, but there are valuable lessons to be learned here. Downlo...
Shoulda on Rails
Shoulda is a framework that sits on top of Test::Unit and adds a ton of nice features like macro's, nested context, and the ability to create custom tests in a block-based DSL. Download 160.2 MB ...
RSpec Subjects
RSpec provides an extremely concise way of representing simple tests to be called on new instances of a class or on explicitly defined receiver objects. You can do this by using 'subjects' either...
Code Metrics with Metric Fu
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 ...
Ruby’s Percent Functions
Ruby uses special characters to define certain data types. If you wish to use these characters in your data types, you need to escape them or use percent functions. Percent functions are much sim...
Nested Forms With JQuery
Ruby on Rails allows you to nest models within a form. Ryan Bates of Railscasts demonstrated how to set up these forms with JavaScript using the Prototype framework, which ships with Rails. In th...
RVM – Ruby Version Manager
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...
Gem Bundler
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 g...
Skinning in Grails
In this screencast, I cover how to use custom Grails configurations along with filters to enable url-based site skins. Download 98.7 MB Download (iphone & ipod) 47.8 MB
Ruby Essentials – Strings, Arrays and Hashes
Are you new to Ruby and want to get a head start? In this screencast, I discuss some of the most common methods and techniques that have to do with strings, arrays and hashes. This is also excell...
Introduction to Grails – Part 2
In this screencast, we continue on our task of creating a 'Stack Overflow' clone by adding more domain classes and relationships between them. We also cover how to test your classes using integra...
Introduction to Grails – Part 1
Are you new to Grails? Grails is an excellent alternative to Ruby on Rails, which uses Groovy / Java. In this screencast, learn how to create a simple CRUD system with Grails. Download 83 MB Down...
Creating an Admin using Nested Controllers
In this screencast, I cover how to create an admin section with a separate login, and describe how nested controllers work. Download 141.5 MB Download (iphone & ipod) 60.4 MB
Easy Rails Jukebox Application
Create a Ruby on Rails Jukebox Application and implement the "permalink" feature instead of the usage of "ID". Taking advantage of the "Counter Cache" you will be able to automatically keep track...
Essential CSS for Every Web Developer
Want to know the basics of CSS? Watch this screencast and learn everything you should know as a web developer. We'll cover the basics which include colors, borders, padding, margins, lists, fonts...
Background Processes with Ruby
Learn how to spawn background processes using Ruby and the Process class. Here we discuss the difference between 'wait' and 'detach'. Download 68.4 MB Download (iphone & ipod) 24 MB
Writing CSS with LESS – Part 2
In this screencast we'll cover using variables, mixins and operations with LESS while building the header for the our Flitter front end. In this screencast we'll cover using variables, mixins and...
Writing CSS with LESS – Part 1
In this screencast we'll cover the basics of setting up a LESS file to compile into CSS as we provide an HTML front end to Flitter, a Ruby on Rails Twitter clone. Download 55.1 MB Download (iphon...
Bash Command Line Editing
Tim Harper (tim.theenchanter.com) presents a 13 minute tour of some of his favorite bash features that he uses on a daily basis. The font size is tiny, so be sure to watch it in full screen. Down...
Introduction to MongoDB – Part III, MongoMapper & Rails
This is the third and final episode on introduction to MongDB. In this screencast, we demonstrate MongoMapper and how to use it in a Rails app. Download 21.8 MB Download (iphone & ipod) 9.5 MB
jQuery Masonry
In this screencast we'll cover aligning floated elements on an HTML page using jQuery, the jQuery Masonry plugin and CSS. Download 83 MB Download (iphone & ipod) 55 MB
Introduction to MongoDB – Part II
This is the second part of the series on MongoDB. In this screencast, we create a small Sinatra app called YASI that accesses the data using MongoDB. Get the code at http://blog.rubyhead.com/file...
Introduction to MongoDB – Part I
In this screencast, you will see the basic CRUD operation using MongoDB shell. This is the first installment of a series on MongoDB. Download 36 MB Download (iphone & ipod) 17 MB
Creating a Twitter Clone in Rails – Part 6
In this concluding episode, we go over how to add search functionality to our Flitter application, and add a 'follow / unfollow' button which uses AJAX. This is the last of the 6-part series on h...
Monitor Twitter with Ruby and Growl
As I run the final stretch to see if I can get a RubyConf ticket, I decided to create a little tool to help me out. If you visit http://search.twitter.com, you will see that they have a search pa...
Creating a Twitter Clone in Rails – Part 5
The saga continues. Here we learn how to add the friends list to your application and we use AJAX to add/remove friends. Download 251.4 Download (iphone & ipod) 111.4
Creating a Twitter Clone in Rails – Part 4
We're almost done! The remaining screencasts are already recorded, but not edited yet. To speed things up, I split it up into 3 or 4 screencasts. This one shows how to make the site look and feel...
Styleize your Rails App with Themes
Don't want to take the time to create a layout for your new Ruby on Rails application? Don't worry. Use the Themes plugin! In this screencast, I show you how to easily add a layout with built-in ...
Easy Rails Runner Application
Have you ever wanted to run a script or command from the command line and insert data into your rails application?, watch this this screencast and you will see the basics of how to interact with ...
Creating a Twitter Clone in Rails – Part 3
In this screencast, we continue our challenge of creating a Twitter clone called 'Flitter' using Ruby on Rails. We learn how to use jQuery to create a countdown for the text area box. We also set...
Creating a Twitter Clone in Rails – Part 2
Now that we have a backbone to our 'Flitter' application, we learn how to create the front end and tie it all together. In this screencast, I cover a lot of CSS and getting your site to look good...
Rails Shell Application in 10 easy steps
In this screencast you will see how to make a rails application capable of parse and execute shell commands using the ruby function %x The screencast start with basic shell commands, creation of ...
Storing Encrypted Data Securely using Active Record
Learn how to save data such as bank information, social security number, or other sensitive information in your Rails application securely by encrypting the data. By using spikex's gem Strongbox,...
Basic Ruby on Rails Routing
Ruby on Rails gives you some simple but powerful tools for mapping URL's and HTTP Verbs to your Controllers and Views. Here is a simple walkthrough of 4 of these 'Routes': default routes, regular...
Getting Connected to Twitter with OAuth
In this screencast, I show you how to use the Twitter gem to connect to Twitter, and we clarify some of the difficulties that comes with learning OAuth. Download 67 MB Download (iphone & ipod) 23...
Ruby Essentials – Blocks
This is a screen-cast explaining how to use blocks in ruby. Download 99.9 MB Download (iphone & ipod) 24.5 MB
Create HD Video for Vimeo with iShowU HD
Quick demonstration on how to create a HD Video that looks sharp on Vimeo.com. I just go over the settings required for creating and exporting the video. Download 18 MB Download (iphone & ipod) 5...
Creating a Twitter Clone in Rails – Part 1
In this series, I attempt to recreate a twitter style application called 'Flitter'. In this installment, I show you how to create an authenticated system easily using existing tools. I also show ...
Getting started with GitHub
An introduction to GitHub, which includes how to create new repositories, set up your account, push and pull, clone and send pull requests. Download 85.4 MB Download (iphone & ipod) 30.4 MB
Introduction to Outside-in Development with Cucumber
This is a basic introduction to integration testing with cucumber. In it, I describe how to use cucumber and rspec to implement a feature in a web application, emphasizing the importance of writi...
Creating a Simple Plugin
Learn how to create a simple plugin using Ruby on Rails. This video will teach you how to turn a view helper into it's own plugin, and extend the ActionView::Base. Download 13 MB Download (iphone...