[yagoham]

Hi, blog post author here. As stated at the beginning, the project is still WIP, and I didn't expect it to end on HN. Sorry for the lack of documentation and convincing example for now !

The post is intended to present the ideas and let people look at the repo, but while the core language is rather complete, a lot of small but important things are still missing to make it usable right now. I sidestepped this issue to still be able to illustrate some points with simple examples.

To answer your questions:

- numToStr would be either in a standard library, or implemented here using standard library functions. It does not exist currently

- the fact that the urls are non empty could be either enforced by the contract itself (ie use a NonEmptyUrl contract). Or you could combine a NonEmptyStr and a Url contract via merging. By default, things with a contract without a default must be present.

- I'm not sure I fully understand your last point, but I don't think a configuration file could "redefine" a function in any meaningful way. Say you write a program "main.ncl", which import some external downloaded source, check it against a contract you've written, and generate a config accordingly. Since the language is pure and variable are lexically scoped, nothing from an import could redefine anything in your current scope, be it your contracts or your functions.