Like when you send a .7z instead of a .zip or .rar to a friend or a teacher because that’s what your computer has installed and they’re like “Oh No, not one of those, now I have to install 7Zip” even though the same program that opens .rar also opens .7z I feel like people are way more annoyed when they receive a .7z
Often used internally in software development to denote things like test files.
feature.jsmight be your code, andfeature.test.jswould contain tests for that code which your testing framework would run automatically based on the filename.Oh yeah I think schemas for helm charts are another example.
values.schema.json
Why it’s not a yaml I’m not sure.