IT Sky Consulting GmbH
The PDF format has experienced a success story on its way from being a quasi proprietary format that could only be dealt with using Adobe tools to a format that is specified and standardized and can be dealt with using open source tools and tools from different vendors. It has become accepted that PDF is …
„PDF and PDF/A formats“ weiterlesen
Any useful databases with non trivial amounts of data have some indexing mechanism in place that helps finding data based on some key values, because a full table scane or something like that is too expensive and too slow to do it often. The most typical situation is having a key and one or more …
„Indexing of Database Tables I (Primary Keys)“ weiterlesen
Deutsch It looks like Stephen Elop’s und Steve Ballmer’s idea to take over the mobile phone branch of Nokia in order to bring MS-Windows as mobile operating system on the success road has failed and will be stopped now. For the mobile phone branch that is now part of Microsoft, Microsoft-CEO Satya Nadella announced, that …
„Microsoft laying off 18000 employees after announced loss“ weiterlesen
Images are usually some obscure binary files. Their most common formats, PNG, SVG, JPEG and GIF are well documented and supported by many software tools. Libraries and APIs exist for accessing these formats, but also a phantastic free interactive software like Gimp. The compression rate that can reasonably be achieved when using these format is …
„Conversion of ASCII-graphics to PNG or JPG“ weiterlesen
Quite honestly I admit that I really love the Posix-APIs for system programming and even some Linux specific extensions to it. I/O, Locking, Semaphores, Shared Memory, Message Queues, Signals, named and anonymous pipes, Unix Domain Sockets, TCP/IP programming, Terminal I/O, pthreads and a lot more are very powerful and fun to program. I do discover …
„System Programming on Linux and MS-Windows“ weiterlesen
Deutsch Some of us are working in IT. And there you can finde some working models. You can work directly as employee of the company whose work you are doing. You can work as contractor (freelancer), with one of several slightly different setups, depending on the country. Or you can work as an employee of …
„Future for IT-Contractors“ weiterlesen
I have visited Scala Days 2015 in Amsterdam. As usual, I took the night train to get there and back. Creative Scala Prior to the conference we did a training session for Scala beginners together with underscore. Some volunteers, including myself, joined the effort and so we were actually more teachers than students. It was …
Deutsch The update of WordPress and its Plugins did not really work. A small change helped a lot: In .htaccess put the following line to the beginning of the file: AddHandler php56-cgi .php … Then all updates seemed to work fine. Maybe this helps others observing the same problem.
In Facebook, Xing, Google+, Vk.com, Linkedin and other of these social media networks we are often encountered with a trivial question like this: 1->2 2->8 3->18 4->32 5->50 6->72 7->? There are some easy patterns. Either it is some polynomial formula or some trick with the digits. But the point is, that any such sequence …
„Find the next entry in a sequence“ weiterlesen
The idea of threads is to share almost all information between the threads of the same process. This implies more effort to avoid creating inconsistencies by simultaneous access to the same data. But sometimes it is necessary to have data private to one thread. This is usually easily accomplished by just using local variables and …
„Thread local variables“ weiterlesen