One of the best collections of well written tutorials on the web for beginners and advanced users.
Understanding Simple Harmonic Motion and Its Applications in Games
Simple harmonic motion is a type of movement commonly used to describe pendulums and springs. In this tutorial, you’ll learn the concepts behind this type of motion, and understand the many different ways you can apply this in your games: from an animated health warning, to the motion of attacking enemy ships.
How to Upload Files with Ease Using DragonFly
File uploads are generally a tricky area in web development. In this tutorial, we will learn how to use Dragonfly, a powerful Ruby gem that makes it easy and efficient to add any kind of upload functionality to a Rails project.









