Finally, the days where a novice programmer can know all of a language are gone, at least for the languages in widespread industrial use. Few people know “all of C” or “all of Java” either and none of those are novices. It follows that nobody should have to apologize for the fact that novices do not know all of C++. What you must do—in any language—is to pick a subset, get working writing code, and gradually learn more of the language, its libraries, and its tools.
Bjarne Stroustrup
Software Freethinker 