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In 2007, Bennett Haselton revealed a minor hack with major implications: querying ranges of numbers on Google would return pages of sensitive information, including Credit Card numbers, Social Security numbers, and more. While Haselton’s hack was addressed and patched, I was able to tweak his original technique to bypass Google’s filter and return the same old dangerous results.

If you haven’t tried AngularJS yet, you’re missing out. The framework consists of a tightly integrated toolset that will help you build well structured, rich client-side applications in a modular fashion—with less code and more flexibility.

One of the reasons I love working with AngularJS is because of its flexibility regarding server communication. Like most JavaScript MVC frameworks, it lets you work with any server-side technology as long as it can serve your app through a RESTful web API. But Angular also provides services on top of XHR that dramatically simplify your code and allow you to abstract API calls into reusable services. As a result, you can move your model and business logic to the front-end and build back-end agnostic web apps. In this AngularJS tutorial, we’ll do just that, one step at a time.

RWD allows a site to adapt for optimal viewing on a variety of devices that range in size based on a media query for mobile and other screen widths. Nowadays, your website will be visited by a wide variety of devices: desktops with large monitors, mid-sized laptops, tablets, smartphones, and more. To achieve an optimal user experience, your site should be adjusting its layout in response to these varied devices (i.e., to their varied screen resolutions and dimensions).

If you’re an experienced developer, you’ve probably progressed from being a humble tester to a senior developer, and if you’re a freelancer, you’ve made another leap, perhaps the biggest of them all, when you started working with clients directly.

Some clients aren’t in the software business; they’re in an entirely different industry that needs a piece of software, and they don’t have a clear and precise vision of what they want from you. This is a far greater challenge than it appears, and here’s what you can do to improve client communication and project documentation.

Inexperienced programmers often think that Java’s automatic garbage collection frees them from the burden of memory management. This is a common misperception: while the garbage collector does its best, it’s entirely possible for even the best programmer to fall prey to crippling memory leaks.

In this post, I’ll explain how and why memory leaks occur in Java and outline an approach for detecting such leaks with the help of a visual interface.

Python is amazing.

Surprisingly, that’s a fairly ambiguous statement. What do I mean by ‘Python’? Do I mean Python the abstract interface? Do I mean CPython, the common Python implementation? Or do I mean something else entirely? Maybe I’m obliquely referring to Jython, or IronPython, or PyPy. Or maybe I’ve really gone off the deep end and I’m talking about RPython or RubyPython (which are very, very different things).

While the technologies mentioned above are commonly-named and commonly-referenced, some of them serve completely different purposes (or at least operate in completely different ways). In this post, I’ll start from scratch and move through the various Python implementations, concluding with a thorough introduction to PyPy, which I believe is the future of the language.

Building games for the iOS platform can be an enriching experience in terms of both financial and personal growth. Recently, I deployed a Cocos2D-based game to the App Store. In this post, I’ll explain the process behind developing games for iOS, from Cocos2D through to publishing.

From the very first days in our lives as programmers, we’ve all dealt with data structures: Arrays, linked lists, trees, sets, stacks and queues are our everyday companions, and the experienced programmer knows when and why to use them.

In this article we’ll see how an oft-neglected data structure, the trie, really shines in application domains with specific features, like word games.

Web Developers often fail to consider the consequences of thousands of users accessing our applications at the same time. Perhaps it’s because we love to rapidly prototype; perhaps it’s because testing such scenarios is simply hard.

Regardless, I’m going to argue that ignoring scalability is not as bad as it sounds—if you use the proper set of tools and follow good development practices. In this case: the Play! framework and the Scala language.

The foreign exchange (forex) market is the most liquid market in the world. Learn from a software developer’s firsthand experience creating forex algorithmic trading strategies—and more—in this trading tutorial.

Sometimes I hear people complaining about their clients, saying that they insist on using Rails, that they’ve had too much Kool Aid. If they are recruiters, they almost feel sick in the stomach from the perspective of having to find yet another ROR prima donna. From the programmer’s point of view, it sometimes looks like clients don’t have a clue. However, I believe most clients know their options just fine and they still decide to go with Rails.