I’m a long time Yahoo Mail user. Just to illustrate how long I’ve been with them: when I joined the space available was a couple of MBs! I staid with them because I was mostly ...

While Internet Connection Sharing is a nifty tool, there are some cases where you would like to do the steps manually. One such case would be if the “primary” network is already using the 192.168.0.1/24 address space, since ICS is hardcoded (as far as I can ...

Some time ago I came over the following article: Fast CRC32 in Assembly. It claimed that the assembly implementation was faster than the one implemented in C. Performance was always something I’m interested in, so I repeated and extended the experiment.

Here are the numbers I got. This is ...

Sometimes you need to quickly start up a webserver that serves up static files (I will describe such a case in the next post). Python to the rescue ...

Some time ago I (wow, time files!) I suggested that using 0.0.0.0 for host-file based blocklists would be faster than using 127.0.0.1. Above you can see an other reason for using 0.0.0.0: some applications take up port 80 on the localhost ...

If you have multiple versions of your code in production, it is extremely useful for the log to include the version of the classes when producing a stacktrace, otherwise it is very hard to match the lines in the stacktrace with the lines of the source code (sidenote: there is ...

Sometimes you have the situation that an issue is only occurring on certain machines or only at a certain time of day. There are a couple of possible methods to investigate such an issue (like: adding extra logging), however I would like to add an other one: remote debugging trough ...

Update: this article has been crossposted to the Transylvania JUG blog.

The Java collections framework includes the concept of NavigableSets / NavigableMaps. The principle behind these interfaces is that taking a SortedSet/SortedMap you can use a subset of it. Some examples:

Given the following set:

@Before
public void ...

Update: This entry has been crossposted to the transylvania-jug blog.

Problem statement: you have some value objects for which you implemented toString() (for debugging purposes) and now you would like to test using a unit test that these implementations exist.

Possible solutions:

1. Use reflection to detect the existence of the ...

Lets say that you have the following problem: you want to write a script which processes the output of a program and writes out the modified somewere, with as little buffering as possible. One concrete example (for which I needed the script) is log rotation: you want to save the ...