Are you using UML? The Unified Modeling language is a very useful notation, especially when it comes to explaining the structure and behavior of object-oriented systems. It is language-independent and offers a wide range of models/diagrams that cover the different aspects (static, dynamic, …

I like Prolog. I think that it’s a brilliant tool. And not purely educational, unlike what many people think. You can actually use it to build real, useful, and practical applications: sudoku solvers, adventure games, formal logical systems, and a lot more. It might not be the best tool for …

When writing code, we need to handle errors. What happens if you are trying to read a corrupt file? Or if the network goes down while receiving data? The programming language runtime will try to give you an error message that makes sense, but that doesn’t mean that this is what you want to …

The problem: You have an unsorted array of strings (product codes, area codes, etc.) containing both letters and numbers (for example 'A28', 'A3', 'A1', etc.) and you want to sort them numerically (that is, 'A1', 'A2', ..., 'An'). Ruby offers a sort method, so let's see what it does...

Nope, that's …