As a part of a project in university, we are making an extension to a functional programming language, made in Scala. One of my groupmates had made some fancy logic with spawning threads, but we had some issues with multiple function parameters. Me and another mate have then spent like 3 days trying to figure out the problem, only to realise he forgot a $ sign in string interpolation for naming parameter. Talk about feeling like you're wasting time 🙃