A good read on vtables
I happened to find some good reading on C++'s virtual tables, their implementation (on g++) and dynamic_cast. Nothing too special, but somehow I've always managed to neglect thinking about this. The...
View ArticleHow to modify author of multiple commits in git
I needed a nifty way of changing author name/e-mail in multiple commits when someone made commits with wrong authorship details.The orig branch here contains the commits to be modified, and rewrite...
View ArticleCD/DVD tray stuck on Debian Sid
In case anyone has run into this peculiar bug, the problem seems to be devkit-disks-daemon (in devicekit-disks package). Debian bug #550316.Killing the daemon allows you to open the tray normally. Bad...
View ArticleSorting dicts by value in python
A couple of tips (read: notes to self:) using sorted() and lambda to sort dicts by values in python.Often you need to count occurrences of previously-unknown keys. The most usual way is to store these...
View Articlegit tips/tricks
I have to admit the more I use git the more I love it. Here are some random tips of commands I have found useful.===========-p is your friend$ git add -p Hand-pick what changes to add to the next...
View Articlegit status / utf-8 umlaut tip
git status and other commands display utf-8 filenames containing umlauts (äö etc) differently from the shell, eg. as escaped (\266, \303 etc). So in case you are having problems with umlauts, the...
View ArticleBlocking Facebook's web history tracking
Now that Facebook is providing a "service" for sites to allow showing an iframe that allows you to like any URL (and see friends who have liked it as well), it is coincidentally collecting data on your...
View ArticleHow to upgrade all dependencies of a debian package
Sometimes Debian Unstable users may find it useful to upgrade all dependencies of a package (missing version dependencies etc). The following command can be used to do it:$ aptitude safe-upgrade...
View ArticlePython: sort two lists - second in the same order as first
[python] labels = [ 'third', 'first', 'second' ] values = [ 30, 10, 20 ] z = sorted(zip(values,labels)) # z # [(10, 'first'), (20, 'second'), (30, 'third')] labels_sorted, values_sorted = zip(*z) #...
View ArticlePython GIL & multicore thread performance
I was linked to an interesting presentation about Python GIL (slides only) & why threads don't really work on multicore systems. The performance issues are really peculiar and unexpected, and even...
View ArticleMy firefox userContent.css tweaks
My \~/.mozilla/firefox/\<profile>/chrome/userContent.css:/* Change cursor for links that open in new window...
View ArticleDebian unstable: "PHP Fatal error: PCRE is not compiled with UTF-8 support"
After recently upgrading php5 in Debian Sid, I started getting this problem (in phpBB3 and MantisBT, etc):PHP Fatal error: PCRE is not compiled with UTF-8 support in (...)It seems the cause was wrong...
View ArticleFirefox 4 not visible on remote desktop
I can't be the first one to suffer from this problem...My bet is on hardware acceleration causing the issue, luckily there is a way to disable it.
View ArticleHow to prevent CherryPy from logging after logging.basicConfig()
For some time, I've wondered how to disable the ill effects of running this in a CherryPy application:[code language="python"]logging.basicConfig(level=logging.DEBUG, stream=sys.stdout)[/code]Finally I...
View ArticleEclipse + m2e = "Launching : Verifying launch attributes" stuck on 57%
I recently came across a really weird Eclipse + Maven problem. Whenever I launched something, the launcher was not only consuming a lot of CPU, but also stuck on "Launching : Verifying launch...
View Articledhclient + nsupdate = dynamic updating of IP to a private DNS server
For future reference: Jeff Garzik has written really good blog posts about using nsupdate:http://linux.yyz.us/nsupdate/http://linux.yyz.us/dns/ddns-server.htmlI should get around to scripting something...
View ArticleLinux: SATA disk manipulation, hot-swapping using /sys/
Linux has a nifty way of allowing disk state modification via /sys/ interface. Very useful when debugging LVM mirroring, disk disaster recovery etc.To put a SATA disk offline/running: echo offline >...
View Articlerdiff-backup: "Warning: Extended Attributes file not found"
My backup cronjobs suddenly started mailing me weird rdiff-backup warnings, like...
View ArticleHow to downgrade Google Hangouts to Google Talk
Like many other unfortunate users, I went ahead and installed Google Hangouts android app right away when it became available on Google Play. Unfortunately, I did not realize it overwrites Google Talk...
View ArticleSimplest init script ever
I ran into a problem of having to write a script with similar functionality to traditional linux init scripts, and I figured there has to be a simple "coreutils" solution for such an everyday task....
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