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Criticism about the training #1

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@habruening

Dear Stefan!

I just did the Clojure course. Our company offers it. Sorry, but I have to give you negative feedback. For example the file petstore.clj. Nobody would work like this. This is pure spagethi code. The code is full of garbage. It does not even work as expected. When you run it in production you will get sporadically errors. These will be super hard to debug. You will never find the bugs. I could go into detail what is wrong in the course. But sorry, there is really nothing good. I would not even know where to start. Maybe paste the example 21 to ChatGPT and ask what is bad of it and what the problem with the def inside the functions is. This is not only an anti pattern or bad style. It is incorrect. It will not work. You misunderstood the concept of immutability. If you are really interested, what I mean, you can watch the video "Simple Made Easy" by Rich Hickey on Youtube. He is the author of Clojure.

And again: You cannot use def in functions! This WILL break your system. It will not work. You are teaching unsafe stuff. It is not a style question. It is very dangerous, also in Python.

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