Author here. The purpose of the post was not to be a tutorial for the language. Just like any other powerful tool, you have to learn it, and this article was not the right place to put a language tutorial.
I thank you for your feedback and I've updated the post to explain that the intent is to writeba separate blog post explaining how this code works.
I thank you for your feedback and I've updated the post to explain that the intent is to writeba separate blog post explaining how this code works.