May 2, 2017 — In case you’re wondering what OAuth2 is, it’s the protocol that enables anyone to log in with their Facebook account. It powers the “Log in with Facebook” button in apps and on websites everywhere. This article shows you how “Log in with Facebook” works and … Read More…

November 28, 2015 — Let’s get a few things out of the way first. This isn’t your regular Smashing Magazine article. It’s not a “how to“; it won’t show you how to build a better menu or improve your project tomorrow. This article shows you how a core problem in computer science works and why … Read More…

February 18, 2015 — Hardly any line of my code comes out perfect the first time I write it. Well, most of the time… Some of the time… Um, hardly ever. The truth is that I spend more time chasing down my own stupid programming errors than I’d like to admit. That’s why I use static analyzers in … Read More…

April 18, 2013 — Static typing is great because it keeps you out of trouble. Dynamic typing is great because it gets out of your way and lets you get your work done faster. The debate between strongly and dynamically typed languages rages on. Read More…

April 16, 2013 — Animation makes games real. Movement adds excitement to a game and makes the characters more realistic. In this article, we’ll look at the Cocos2D library and how it supports programmatic animations in iPhone games. Read More…

February 13, 2013 — I love games and I’m a huge math nerd, so I made a new iPhone game based on a famous math problem called The Seven Bridges of Königsberg. I’m selling it in the App Store, but I also want to share it with everyone, so I made it open source. Read More…

December 14, 2012 — JavaScript has been called everything from great to awful to the assembly language of the Web, but we all use it. Love JavaScript or hate it: everyone admits there are serious flaws and not many other choices. Read More…

July 18, 2012 — You’ve presented the new website and everyone loves it. The design is crisp, the code is bug-free, and you’re ready to release. Then someone asks, “Does it work in Japanese?” You break out in a cold sweat: you have no idea. The website works in English, and you … Read More…

June 12, 2012 — Your website works. Now let’s make it work faster. Website performance is about two things: how fast the page loads, and how fast the code on it runs. Read More…

May 17, 2012 — E-commerce runs on secrets. Those secrets let you update your blog, shop at Amazon and share code on GitHub. Computer security is all about keeping your secrets known only to you and the people you choose to share them with. We’ve been sharing secrets for centuries, but the … Read More…