You have a solid grasp of Rust. You know about ownership, traits, and maybe even a few lifetimes. But now you want to ship something real. A command line tool that people actually install and use. Bui…

Caching is one of those concepts that sounds simple until it breaks your production system at 3 AM. You add a cache layer to speed things up, and for a while everything feels great. Then users start r…

You wrote a unit test for a function that adds items to a shopping cart. You tested adding one item. You tested adding a duplicate. You tested removing an item. Everything passed. Then a user added 10…