Suppose you have a page at http://www.example.com/mypage.php?ab=38 but you want people or bots that access it to see this page instead: http://www.example.com/mypage.php?ab=38&cd=39 By the way, this is not some constrained example – it is from a real production site where the owner has little control over the PHP code. It took a bit of experimenting …
I’m going to make three predictions today: Cloud vs. PC: The PC is not going to fade into insignificance in the near (1-2 years) or more distant (3-10 years) future. Tablet/Mobile vs. PC: See above. Cross platform development tools are going to rise in popularity. You are welcome to come back anytime during the next …
Continue reading ‘Predicting software development platforms’ »
I once created a site that shows you interesting things that happened a round number of days ago. You can also check when you special day birthday is, for example, at what date do you turn to be 17000 days old ? Although the site even made the news once, I didn’t bother to maintain …
When I moved from Windows being my default OS to Ubuntu Linux, the thing that I missed the most was Total Commander. Over the years it got so that if I ever found myself on a computer that didn’t have it, I could immediately feel my productivity getting a hit. On Ubuntu, I used Gnome …
Continue reading ‘Changing browser associated with html files on Krusader’ »
Constraint programming can get some getting used to. In the usual programming frame of mind (whether with functional or imperative languages) you think of the algorithm and specify to the computer, via your code, exactly what steps to go through in order to solve the problem. With constraint programming, you don’t tell the computer what …
Continue reading ‘Solving a puzzle with constraint programming’ »
Constraint programming is a field that is about solving problems where you have to find a solution in a (usually large) search space given specific constraints. A classic problem of this sort is the eight queens puzzle. There are quite a few good constraint program libraries, among them are java based Choco and C++ based …
Before writing a minimal sample for some technology, I usually take the time to see if there already exist one on the net. For a simple example that illustrates how to combine Qt and OpenCV I found the following post. Just download the project at the end of that post. This post explains compiling the …
OpenCV is considered by many to be the best open source computer vision library. It has versions for Windows, Linux, Mac, iOS and Android. As Windows installation is usually easier, I’ll focus on Linux/Mac. OpenCV uses cmake (Cross Platform Make) to configure and build the library. You can download cmake for the relevant platforms here …
Being able to make and run the Qt samples is cool, but to really dig into learning a framework I prefer to have the ability to easily navigate to declarations, easily debug, auto completion, in short – an IDE. There are two options that I recommend. The first is QtCreator – the IDE that comes …
After cd’ing into ever deeper directory structures the shell prompt made my console look like a mess. A great article about prompt magic gave me all that I needed to clean this up.