but what don't usually write in books
What are you in the books just is and write. Here, for example, your question about storing password hashes, not plain-text representation, certainly well discussed in the book https://www.amazon.com/Web-Application-Security-Be...
. This is the first that I came across in the search, but the index and contents, where it will be 100%.
reading the textbook, starting to write something and then accidentally finds out
Yeah, maybe is tutorial's not one you want to read.
You probably want to say - and if I read at least one book for every an example of you? No, in General I have not read so many books. At some point, I: a) started to do finished working things (apps/scripts/etc); b) job; C) even before all of this learned in time to ask yourself the question "what am I doing?". The number of information sources increased: to books and lecturers were added, and then added a sense of "something I write bad code, you can't do better." Then Google and improve every day.
You by and large ask - where can I find a website to pass this way for N days/weeks. You are not alone - everyone wanted it. Moreover, many think that "the dude" when I found this site and so this fellow now.
If there was a "website", seniors with 10 years of experience 15 years (10 years full experience PLUS 5 years of training and part-time jobs) collected information from thousands historickou and experienced firsthand, I would not suggest salaries in the hundreds of thousands of rubles.