Thanks for the recommendation. I'll keep that in mind. If you ever get the chance I'd love to read some more J related articles as I find the language weirdly fascinating even though it ain't easy. The community doesn't write a lot of marketing junk either. I've been reading through "J the Natural Language for Analytic Computing" to scratch the itch when it comes up. I'm always impressed when I find that it has things like derivatives as a native primitive.