Nothing related specifically to mobile development today but a small script that is probably of interest for those that are using Subversion on a Debian Linux powered server and recently upgraded it to the Lenny release (which is obviously our case!)

I am always missing a table which list all SymbianSigned capabilities and option I do have to use them. Such table of course exit in SymbianSigned documentation but it is just too well hidden in a middle of a document.... So here is a short reminder for you too.

Most of the Nokia 5800 Express Music phones that you can buy today come with a nice (!) firmware bug that prevents you from installing any application on them: each try fails with a "Certificate Expired" error message. Here is how to solve the problem.

This article explains how to flash Nitdroid - the port of Google Android on Nokia Internet Tablet - on a N770 (or for the lazy ones watch the related video).

This article presents a mechanism for using active objects for implementing message passing between (equal) threads. This is not a new idea by any standards, but having come across a working implementation for it some time ago, I found it elegant and useful enough to improve it further and present it here. Now, the explicit use of threads is often discouraged in Symbian, and even if they should be used, the client-server framework wrapped around the server thread is in most cases more than enough to provide inter-thread communication. However here I try to present a solution to a problem where there are 2 equal producer/consumer threads that require two-way communication not easily available via client-server framework.

When I started understanding ECom architecture of Symbian, I tried to map it with some design pattern from the GoF book. This way I found out that the Strategy Pattern described as one of the Behavioral Patterns is the closest match. Let me share my understanding with you.

A small tip to control the visibility of a listbox highlight. This allow you to use a listbox for the layout of some information while you don't need to handle any specific selection.

When I started understanding Active Object framework in Symbian, it was difficult for me to grasp the idea how the front end UI is not frozen, in the event of long running task, even when we don't use multiple threads. But when i started understanding the active object framework in conjunction with the client-server architecture of symbian, I got the idea. I would like to share it with you.