Although I find the order of topics questionable, at least they talk about undefined behavior instead of saying blatantly wrong outdated stuff like "a read out

Although I find the order of topics questionable, at least they talk about undefined behavior instead of saying blatantly wrong outdated stuff like "a read out of array range will just result in some garbage value being read". I've read some random pages and nothing stood out as blatantly wrong, which is already a high bar for a C++ course. C++ is awful for beginners exactly because of undefined behavior, no good book can fix that, IMHO. As for topics covered, talking in details about linkage, functions, constexpr, bit manipulation before if/for statements is, uhm, questionable, if this is aimed at beginners. Then the site talks about type conversions, function overloading, structs, and arrays only appear somewhere in the middle. Moreover, much simpler std::vector is introduced _after_ C-style arrays. Wild ride for a reader, but one can argue such order is more "academic", whatever that means.