C lets a lot of exciting things happen inside an if statement. I once spent a couple hours cleaning up a big, ugly and unfamiliar codebase with transformations

C lets a lot of exciting things happen inside an if statement. I once spent a couple hours cleaning up a big, ugly and unfamiliar codebase with transformations like that before I realized I was ignoring some side-effects and was therefore introducing bugs willy-nilly. (Isn't version control great?)