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. Get the code at http://blog.rubyhead.com/files/mongodemo.zip

Introduction to MongoDB – Part III, MongoMapper & Rails from Joon You on Vimeo.

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/files/yasi.zip

Introduction to MongoDB – Part II, Ruby from Joon You on Vimeo.

Here it is, the first of a series on MongoDB. I decided not to go over the concepts since there are extensive coverage already on the net. I highly recommend the presentation slides from nyc.rb and also checkout Peepcode’s screencast on CouchDB.

Teach Me To Code

Introduction to MongoDB – Part I from Joon You on Vimeo.

vim makes multi-line edit a breeze as I use the feature to comment out multiple lines. Just use v->ctrl-v to select the lines. Use shift to enter i or r.

RubyHead Short – Vim & Me Part II from Joon You on Vimeo.

RubyHead Short – Vim & Me Part 1 from Joon You on Vimeo.

Notes:

for toggling NERDTree, from my .vimrc,

nmap :NERDTreeToggle


MongoDB Install from Joon You on Vimeo.

Ever wonder how Rails apps can recognize your account by subdomains? Well, here’s how.

RubyHead Short – Subdomain in Rails from Joon You on Vimeo.

Outsourcing + Fork from Joon You on Vimeo.

In this episode, I demonstrate outsourcing a function to the command line within Ruby and create asynchronous process using fork. The example takes a video file and converts it to Flash file using ffmpeg. Forking can be used with Rails, but please use Spawn plugin or do the sensible thing by using other queuing mechanism.

The code for the example used in this screencast: