Let’s examine a refactoring to move code to follow the open/closed principle. We’ll see how the resulting calling code becomes much easier to read locally, without having to open other files or classes to understand what’s going on. Open/closed principle First, let’s do a quick recap of the open/closed principle. Classes should be open to extension, but closed to modification. What does that mean? Let’s take it a half at a time.

Ruby Reactoring

Everybody loves the SuperBowl commercials! Last year, I hacked up a script to randomly generate items to create your own bingo cards. This year, I improved the script to actually generate the cards as a PDF file based on an excel sheet of bingo items.

My Stuff Ruby