Dev102.com has a few postings about interesting job interview question. His fifth challenge is this neat task:
You are asked to sort a collection of records. The records are stored in a file on the disk, and the size of the file is much bigger than available memory you can work with. Assume a record size [...]

XDCC-Fetch is a nice little application written in Ruby that is able to download from XDCC bots on IRC. I have updated it to work with fox 1.6, so this should work with the recent Ruby version.
Screenshot

Unfortunately I don’t really have the time nor the interest to continue development for XDCC-Fetch. Please contact me if [...]

I have already written about approximations of e^x, log(x) and pow(a, b) in my post Optimized Exponential Functions for Java. Now I have more In particular, the pow() function is now even faster, simpler, and more accurate. Without further ado, I proudly give you the brand new approximation:
Approximation of pow() in Java
public static double [...]

The Javadoc Search Engine now searches JDK 7 too:

Go here: javadoc.ankerl.com

It’s still a draft, so the documentation is surely subject to change. You can also use the search directly from here:

happy hacking!

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Markus Holzmann, an intern at Profactor of my fellow colleague Philipp Hartl, had the opportunity to experiment with Ajax during his job. He wrote a tutorial about how to push events from the server to the client. For example, display popup messages on all browsers at the same time (see screencast in full resolution here):

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