IT Sky Consulting GmbH
Additional indices („indexes“ in Oracle’s English) apart from the primary key are extremely important for the performance of databases. There is this magic behind it, when a complicated query with multiple joins runs slowly and magically becomes faster when adding the right index and the right hint or does not become faster at all, even …
„Indexing of Database Tables II (additional indices)“ weiterlesen
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
English Wie es aussieht, ist die Idee von Stephen Elop und Steve Ballmer, die Mobilfunksparte von Nokia auszuschlachten und damit für MS-Windows als Mobiltelefonbetriebssystem einen Fuß in die Tür zu bekommen, nicht aufgegangen und wird jetzt gestoppt. Für die durch Microsoft von Nokia übernommene Mobiltelefonsparte kündigte Microsoft-CEO Satya Nadella an, dass Milliarden abgeschrieben werden und …
„Microsoft entlässt bis zu 18000 Mitarbeiter nach Milliardenverlust“ 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
English Einige von uns arbeiten in der Informatik. Und dort gibt es doch einige Modelle. Man kann bei der Firma, der man die Arbeit erledigt, direkt angestellt sein. Man kann als Freiberufler, also entweder mit einem speziellen Freiberufler-Status oder mit einer eigenen Ein-Personen-Firma für seinen Kunden arbeiten. Oder man kann als Angestellter einer größeren Firma …
„Zukunft für IT-Freiberufler“ 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 …