The other day, woot.com was selling the Cruz T301 tablet–a 7″ Android 2.2 device–for $60. The stock OS was a customized version of Android that had a lot of applications missing… For one, instead of the Android Market, it had the “Cruz Market”. I figured I’d buy two and try to root them to get a real Android device–in case I bricked one I could still use the second one as an e-Book reader (the stock OS includes the Amazon Kindle App).
Last week I took a course on projection mapping at the Center for Design and Innovation. It was 6 days, 3 hours per day, and I learned a LOT. On the last day of class work, we spent a few hours applying everything that we learned into quick videos which were projection-mapped onto a 3D surface (3 blocks painted white).
When developing a sometimes-disconnected application in .NET, you have the ability to create a “local data cache” (Sql CE file) and then synchronize this local database with a server database periodically (when connected) to keep the data relevant.
Of course to actually interact with the data from your .NET application, you will want to create a data model with Entity Framework. There are a few tricks that can make the whole process much simpler.
When I am developing against MongoDB I don’t want the server to run all the time and use up my memory. Instead, what I do is manually start/stop the server and specify config files so that it can run on various data directories.
To set it up, I downloaded MongoDB to ~/Downloads, and then extracted to a directory where I keep various apps: ~/Apps/mongodb-linux-x86_64-2.0.1.
Inside the MongoDB directory is a bin directory. I create a symbolic link to everything there from my home bin directory (~/bin).
When I log in, the ~/.bashrc file in Kubuntu adds everything in ~/bin to the $PATH. This way I can easily run mongod from the bash manually and specify a config file for mongod to use (so I can switch between database directories easily for different projects).
When the computer freezes (as has happened multiple times under Ubuntu w/Unity to me), press ALT + PrintScreen/SysRq + R + E + I + S + U + B.
AccessViolationException, EntryPointNotFoundException, and Change Tracking Error on SyncAgent.Synchronize()
Recently I was working on a data-driven application which needed to continue operating in sometimes-disconnected environments. In theory, this is a fairly simple problem to solve with .NET Sync Framework using a “Local Data Cache” implementation of SQL Server CE file and SQL Server database–a solution that I have implemented several times in the past.
Never have I had to jump through so many crazy hoops.
As many folks, I do not like the Unity interface in the latest versions of Ubuntu. In Ubuntu 11.04, I had used the “Classic” mode when logging in, but after upgrading to 11.10 I’ve had to take additional steps to avoid the Unity UI.