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Powerful Google Visualizations for Ruby on Rails

Partitioned Graph Coloring

Despite being able to simply provide a link to wikipedia’s already excellent article on Linear Programming, I wanted to provide a short introduction in order to present what I am doing exactly on my thesis in a future article. Linear Programming...

Making a thesis 2.0

Whenever one of our team member travels to another country we tell her to track expenses like food, transportation and accomodation so that later that money can be refunded. Each of us does it in a different way: we write it in a notes application...

Install the RMagick gem in the painless way with Homebrew

Many times we end up having similar tests: same logic but different inputs and expected outputs. For example, suppose we need to test our brand new sqrt function: test "sqrt 1" do assert_equals 1, sqrt(1) end test "sqrt 4" do assert_equals 2,

On the previous post I wrote a few lines on the basic usage of the accepts_nested_attributes_for method in rails models. I strongly recommend reading that post before this one if you haven’t. Although there is a standard way for deleting items, there...

It’s been a while since the last time I wrote something here. I realize I’ve promised several posts which never got written, such as some experiments with bizarre random number generators, the architecture of the silverlight DynamicDeepZoom app we...

Handling children with accepts_nested_attributes_for in Rails