> So in this example, since it's a (List Any), in order to get this to work would we cast the Any to be an Int to then put it through sqrt? I wouldn't recommen

> So in this example, since it's a (List Any), in order to get this to work would we cast the Any to be an Int to then put it through sqrt? I wouldn't recommend you use casting the way it's done in C. It defeats the purpose of having a strong type system if you can change the types like that. Having a function which checks the type and gives an error if it's not the type you expect is, I think, a better approach. I'm still actively developing Full Metal Jacket. Glad you find it interesting. An interpreter for the basic language is almost complete. I'll soon add to my tutorials (http://web.onetel.com/~hibou/fmj/tutorials/TOC.html http://web.onetel.com/~hibou/fmj/tutorials/TOC.html) how to do inlining and substitution macros, and how to define new types. Then I'll make my code more robust, possibly add a compiler, and arrange a release on a shared-source licence.