2011.12.13 in #21When slower is better: Secure your passwords
Sebastian Willing (Sewi) explains how to store passwords in a very secure way and how to maintain or even increase the security level while cracking passwords is getting faster and faster.
2012.01.05 in #24Hunting down a memory leak
Sebastian Willing (Sewi) takes us on a tour of a simple looking Perl code that had a memory leak and shows us how to eliminate that.
2012.02.24 in #31Think looping
Frequent updates to a database and frequent opening of a file can be very time consuming. Sebastian Willing (Sewi) shows how he made his code much faster by some caching and by trading accuracy in the database, for speed.
2012.04.30 in #41Creating a crossword puzzle
Using Perl and some other glue Sebastian Willing explains how to create a crossword puzzle in German. I guess you could apply the same method in other languages as well.
2013.07.09 in #103Retry failed Gearman jobs
Gearman manages your computational tasks and hands them out to available workers. It can do it in a fault tolerant way. Sebastian Willing is showing us how to retry failed jobs.
2013.07.15 in #104Converting a WordPress theme to MovableType
WordPress has tons of plugins and themes and what not. Many of these are open source, so if you have some other blogging engine, for example Movable Type, or even a simple, static 'blog engine', you could convert the nice WordPress themes to one of your own. This is what Sebastian Willing has been describing in his recent blog entry.