Get the latest tech news
Blacksmithing and Lisp
A blog about computers, functional languages, Lisp, and Scheme.
You don't want to drop a piece of hot steel, so you'd like your tongs to be a good fit on your work. When they have softened, put the hot tongs around the cold workpiece and tap them into shape with your hammer. A good part of blacksmithing is creating ad hoc tools in pursuit of the end goal.
Or read this on Hacker News