bookshelfRepository.findById(1).get() returns a Bookshelf with non empty books, but bookshelfRepository.findById(shelf.getId()).get() does not. This API is not consistent, which may confuse programmers. — Guobiao Mo 1 min ago

It is okay to ask about homework. For one, it would be impossible to stop it all even if we wanted to. Stack Overflow exists to help programmers learn and provide a standard repository for programming problems, both simple and complex, and this includes helping students. — Eddie Keller 34 secs ago

Please do not assume your users' (and other programmers') gender. Many people on StackOverflow do not identify as males and your post might be perceived as offensive. — Jerie Wang 18 secs ago

programmersought.com/article/58963128680 — emandt 18 secs ago

Welcome to Stack Overflow. Please take the tour to learn how Stack Overflow works and read How to Ask on how to improve the quality of your question. Then edit your question to include the full source code you have as a minimal reproducible example, which can be tested by others. Please see: Why is “Is it possible to…” a poorly worded question? (don't just change your question to "How"). Please show your attempts you have tried and the problems/error messages you get from your attempts. — Progman just now

@Newline: It is not required or specified that the non-const and const instantiations should be identical, so I can't give a direct reference to something non-existing ;-) The reinterpret_cast is needed because there is no such guarantee. If you want to dive into the rabbit-hole of which optimizations can affect only the const case, I suggest looking into "constant folding" or other questions about how const is treated (e.g. link ) — olm 6 secs ago

Well, my pedantic side tells me I have to address issues On GNU/Linux terminal, when I add --help to any command Terminal is unrelated to what a command excepts. And terminal code license and OS is unrelated to what command does with its arguments. And no, not all commands print help when passed --help. And no, not all commands output a "consistent" --help page... And asking for software recommendations is offtopic for stackoverflow. And, anyway, see man sources, which uses argp — KamilCuk 51 secs ago

In particular your page object 5 points to object 6 as content stream, but object 6 is not a content stream but an image xobject! (You probably meant to point at object 7.) Furthermore, all your cross reference table offsets are wrong and the Size entry in the trailer is wrong. Then there is an /ID between trailer dictionary and startxref. And there probably are more issues, but start by fixing these. Other than that, for software recommendations you should ask on Software Recommendations instead. — mkl 26 secs ago

Please go through the intro tour, the help center and how to ask a good question to see how this site works and to help you improve your current and future questions, which can help you get better answers. Asking for software recommendations or references is specifically listed as off-topic. — Prune 43 secs ago

Welcome to Stack Overflow. Please take the tour to learn how Stack Overflow works and read How to Ask on how to improve the quality of your question. Then check the help center to see what questions you can ask. Please see: Why is “Is it possible to…” a poorly worded question? (don't just change your question to "How"). Please show your attempts you have tried and the problems/error messages you get from your attempts. — Progman 48 secs ago