There is a bug in Unity that will infuriate you when you figure out what’s going on. Take the following code: SetXToOneAsync(); yield return new WaitUntil(() => x == 1); Assert.AreEqual(1, x) In what possible world could the assertion fail? You waited until X was 1, then asserted that X…

As your company grows, it is natural to move from Heroku to AWS. What about the reverse? Motivations: Deciding between ElasticBeanstalk and Heroku Why I switched to AWS Heroku’s cost structure is frustratingly nonlinear: once you hit certain limits, the cost skyrockets. …

A quick tutorial to get you started with a MaxBotix Ultrasonic Sensor and a Raspberry Pi. These ultrasonic sensors are an inexpensive way to detect the distance to the nearest object in the line of sight. If you’re here, you may have already tried following the MaxBotix tutorial and found…

Running a Twitter Bot on AWS Lambda is almost certainly free — the Twitter API rate limits are low enough that you’re likely not going to exceed the 3.2 million seconds of free compute time per month. To make the @realBigBoyTrump TwitterBot, I needed to read each of Trump’s tweets…

A standard election allows you to vote for one candidate. Your ballot looks like this: The results of such an election are easy to understand, too:

Overcoming the surprisingly stringent thread-unsafety of Qt — Writing parallel code is always a challenge, but there are extra precautions you must take when multithreading with the Qt framework. Failing to heed these precautions will lead to race conditions which cause random, hard-to-track and hard-to-reproduce crashes. What “thread-safe” means to Qt Most objects in Qt are not thread-safe. In other contexts, an object…