Several times I have implemented topological sorts and parsers as part of routine work in very ordinary tech jobs. I think it is absolutely incorrect to say tha

Several times I have implemented topological sorts and parsers as part of routine work in very ordinary tech jobs. I think it is absolutely incorrect to say that these tasks are tantamount to implementing your own crypto. They are not things you do every day, but they are basic informatics and to be honest if a developer told me that they could never conceive of implementing them in their job I would be inclined to regard them as someone who was working without a full toolbox, so to speak.