Blog

I just updated the rgviz-rails gem to work with Rails 3. It was pretty easy, following the instructions of this site. I also moved the code from Google Code to github, so i can have all my projects under a single tree, and to start using git more...

In our development team we want our testers to start writing cucumber features. I know, BDD, the features should be written before the code, but a tester could later add scenarios which we haven’t previously thought or regression features for bugs...

The Gettext C# Utilities GNU project, containing convenient classes, templates, scripts and tools for easily implementing gettext i18n support for C# and ASP NET applications, has been polished up and version 1.0 is ready for download. I’ve written...

This past weekend, together with Emmanuel Oga, we’ve been coding a Ruby on Rails application for this year’s Rails Rumble. The idea: in github you can watch some repositories, but later you can’t make a search over those watches. The only search github...

In previous posts I have presented separately the graph coloring problem, as well as its generalization, the partitioned graph coloring problem, and linear programming. It is time to put both of them toghether, by modelling an instance of graph coloring...

Ok, now you can easily implement a Google Visualization API data source on rails. But… are you still using javascript to render them? Well, you don’t need to do that anymore. Now rgviz-rails supports a pretty simple and powerful way to do it. In your...

Careful when using mutable types as default arguments in Python

So we have this project in Ruby on Rails where we keep track of several reports. Now we need to do some visualizations with all those reports. We analyzed several solutions. One was using Google Fusion Tables but we soon realized it was not an easy...

Partitioned Graph Coloring

What is Linear Programming