The simple and obvious way to walk through a graph

At some point in your programming career you may have to go through a graph of items and process them all exactly once. If you keep following neighbours, the path might loop back on itself, so you need to keep track of which ones have been processed already.

UMA and free long distance

What's to stop me from travelling to another continent, and then making free long distance calls to local numbers back home? Technically, nothing.

Usability Nightmare: Xfce Settings Manager

Rant: Why can't anyone make a good settings screen?

Cell Phones on Airplanes

Much ink has been spilled about the use of cell phones on airplanes. Here's the truth, which will be disappointing to conspiracy theorists: Cell phone signals most definately have an effect on other electronic equipment. Read on for more.

Regular Expression Matching can be Ugly and Slow

If you open the first few pages of O'Reilly's Beautiful Code, you will find a well written chapter by Brian Kernighan (Personal motto: "No, I didn't invent C. Who told you that?"). The non-C inventing professor describes how a limited form of regular expressions can be implemented elegantly in only a few lines of C code.

The Curious Complexity of Being Turned On

In software, the simplest things can turn into a nightmare, especially at a large company.

I didn't know you could mix and match (comic)

How wide should you make your web page?

Based on 22500 unique IP addresses over the past week.

Exploiting perceptual colour difference for edge detection

Think colour isn't important in image processing algorithms? Let's try it both ways, and see for yourself.

Game Theory, Salary Negotiation, and Programmers

When you get a new job, you can breathe a sigh of relief, but not for long. You have an offer letter in your hand, and it is easy to miss one of the most important opportunities of your life: the starting salary. Here's what to do to increase your chances.