Disclaimer This card is a collection of guides and things to have in mind when upgrading to a specific version...
Besides Plotting graphs in Ruby with Gruff, which comes handy for many uses cases, you sometimes might need configuration for...
Both knapsack and parallel_tests have the option to split groups by historic execution time. The required logs for this...
For my computer science bachelor's thesis I programmed and evaluated a CLI Test Case Prioritization (TCP) tool for makandra...
The git doc states on the difference of these two commands: git-restore[1] is about restoring files in the...
Rails' url_for is useful for generating routes from a Hash, but can lead to an open redirect vulnerability.
An introduction to mangling When you minify ("compress", "optimize") your JavaScript for production, the names of your functions and variables...
In CI test runs I noticed that string sorting order changed after switching from a debian-based PostgreSQL docker image...
Rails offers several methods to manage three types of different cookies along with a session storage for cookies. These...
Git log offers useful options for filtering. This card provides a short overview. By message Only commits that include a...
Sometimes you'll find yourself with a set of tasks that require similar code for different models. For example, if...
When you write your next CarrierWave uploader, consider processing your images with libvips instead of ImageMagick. Reasons for libvips
We have a long-standing checklist for merge requests. However, it hardly matches the intricate requirements for design. This checklist...
It most cases it's not necessary to add a version constraint next to your packages in the package.json. Since...
It most cases it's not necessary to add a version constraint next to your gems in the Gemfile. Since...
If you have a fully functional CI pipeline but no CD, you might find yourself frequently waiting for CI (with...
Git commands like diff use the less binary for their output representation. I often find myself searching for strings like...
Code splitting is a feature of esbuild that can keep huge libraries out of the main bundle. How code splitting...
Context and further resources Even though you can get 90% of debugging done with up to 5 basic byebug commands...
I recently noticed that better_errors allows you to to open files from within your favorite editor. However it was...
Debugging your integration tests, that run a headless Chrome inside a docker image, is tricky. In many cases you can...
The rubocop binary has a few interesting flags: rubocop (using the --parallel default ) scans the current repository for linting issues...
When you allow file uploads in your app, a user might upload content that hurts other users. Our primary concern...
Rack::SteadyETag was a Rack middleware that generates the same default ETag for responses that only differ in XOR-masked...