Ken Muse

If you’re going to build custom images for ARC or standalone VM runners, then you probably want to take some time to preload it with the tools that matter to your builds. If you want that process to work well for the GitHub-provided tools and actions/setup- Actions, then you’ll want to know how to prepopulate the runner’s tool cache.

Understanding ARC begins with understanding what it does (and does not do) to create runners on Kubernetes. The process is surprisingly straight-forward, and understanding it is key to mastering ARC.

The world of dev containers is constantly changing. Sometimes, even with community-driven specifications, there is a bit of room for interpretation. The initializeCommand lifecycle script is a great example of this, and the specification has been updated to align with the implementations. Learn how this affects your dev containers (and why your scripts should always be idempotent).

Ever wondered why some numbers never seem to add up? Or why adding 0.1 and 0.2 doesn’t exactly equal 0.3 in JavaScript? Or why adding two numbers sometimes gives an unexpected value with floats and doubles in C# and Java? It’s time to understand floating point numbers and the magic that makes them operate.