Fast and accurate: testing the same contract two ways

A Javalin-based REST server for a Gold Mine game, demonstrating a test architecture that runs the same tests both in-memory and over the network.

Why I still blog in 2026

It is 2026 and I still have a blog. Not because it is cool. Not because it is trendy. Blogging stopped being fashionable years ago. I keep writing because it is one of the best ways I know to actually learn things.

Different asserts are good in different situations

When should you use which assert? It is a question developers new to unit tests may ask themselves.

It is easy as a seasoned developer to think that this is obvious. It isn't when you are learning.

Teaching - the difference between a lecture and a conversation

There is a big difference when teaching a large group and teaching a small group. I recently had the pleasure of teaching the same material in a few different scenarios. One of them with a large audience of about 70 participants. It took me approximately 2.5 hours to go through all slides and coding an example. Two other scenarios was with small groups with less than 10 participants. The exact same material took a little over a little over 3 hours to complete.

What is the difference between i++ and ++i?

During a coaching session I got a question about a loop.

Would there be any difference in the output from a loop defined as

for (int i = 0; i < 3; i++) {
    System.out.print(i + " ");
}

and a loop defined as

for (int i = 0; i < 3; ++i) {
    System.out.print(i + " ");
}

in Java?