Felix' Blog

Google uses automated translation

admin — Thu, 27 May 2010 22:36:42 +0000

Hi folks,

Google uses automated translation to German. For those who aren’t able to understand German: In the right bottom is the outstanding time. In English you would say: 1:01 left. If you translate left to German it has more meanings, similar to Englisch. Links means the left direction in English.

SVN authentication problems

admin — Fri, 21 May 2010 19:55:11 +0000

Today I got this error message while “svn info ”

Password for ‘(null)’ GNOME keyring:

After a long Google search I found a simple solution:

rm ~/.gnome2/keyrings/*

Thats it., but please be careful. All your passwords, which are stored in the keyring are lost after this fix.

How to unlock eclipse, firefox, and thunderbird?

admin — Sat, 08 May 2010 02:20:42 +0000

Hi, today I run into a huge trouble. My linux box was out of order. After a hard reset eclipse, firefox, and thunderbird were locked. Firefox and thunderbird appears with a message, that a other process, that is not runnable holds the lock. Eclipse said that another process holds the lock of this workspace.I fixed it.

Firefox: goto ~/.mozilla/firefox/ and remove lock and .parentlock. Then I got another problem. Firefox was different. I had to create a new profile.
Thunderbird: goto ~/.mozilla-thunderbird/ and remove lock and .parentlock.
Eclipse: In /.metadata there is a .lock fiel. Remove it.

Software Architecture: What is a good library?

admin — Fri, 07 May 2010 03:38:29 +0000

In my last post I told you something about parallel libraries. I will talk about some of these in further posts. First at all I have to define: What is a good library for me? There are several metrics for a good library. Here are mine:

Stable, library doesn’t crash the application
Easy to use, simple API
High performance (speed, memory consumption)
High Portability
Further support

A library should not cover all the problems in software development. I prefer to use more good libraries than one giant library. A library is a piece of code that is very specialist. Library developers should be aware of, that their library would be in use over the next 10 years. Developing a library sounds very easy. But developing a simple library that covers the most problems, for which the library is created for, is one of the hardest jobs in software development. I will show you some examples, which show both sides (good and bad) in further posts here.

So long, stay tuned

Multi threading: Make it easy as possible

admin — Thu, 06 May 2010 03:15:12 +0000

Multi threading creates a lot of new competitions in software development. Software engineering has a answer to simplify parallel programming: use a library. The library will do all the hard stuff for you. There are different parallel libraries for different languages.

Java: java.util.concurrent, especially since JDK 1.7 Java will provide a huge range of build-in solutions.
Java: other Libraries are available (Parallel Java Library, http://www.cs.rit.edu/~ark/pj.shtml)
.Net: since .Net 4.0 Microsoft released the Task Parallel Library, great interface
C++: My favorite are the Intel Threading Building Blocks, improved interface, thanks to C++0x

I will pick some of these libraries in further posts.

So long

Hello out there

admin — Thu, 06 May 2010 02:03:27 +0000

This is my new blog. I will post many all about software development. So please, stay tuned.