> the code examples are given in a language everyday programmers will probably not recognize

The code examples are given assuming the reader already knows the language and runtime -- not once in the article does it say what this language is or explain the syntax/grammar rules. I would take it to mean this isn't meant for a broad audience, or the author has made a common curse of knowledge[0] mistake.

[0]: "The curse of knowledge is a cognitive bias that occurs when an individual, communicating with other individuals, unknowingly assumes that the others have the background to understand." https://en.wikipedia.org/wiki/Curse_of_knowledge