Don’t blindly prefer emplace_back to push_back

I’ve personally never encountered the particular misunderstanding the author dispels here, but I’m sure the post is written from bitter experience. On the one hand, I shouldn’t be that surprised: Unfortunately, programming in C++ is really brutal for people who would rather learn by example than by carefully reading documentation.

But on the other hand, my instinctive reaction is: Come on, is this really something that confuses people? emplace_back is all about constructing something in-place, which is exactly the opposite of moving it there! How can any professional programmer be 180 degrees wrong about the purpose of a function they use regularly?

What I want to say here is that C++ is really hard, and that there are a million subtle things that one simply has to look up instead of making educated guesses. I don’t think people appreciate this difficulty enough.

> Unfortunately, programming in C++ is really brutal for people who would rather learn by example than by carefully reading documentation.

This is a great observation! There's probably a ton of this that feeds the "$lang/api/framework is garbage"/"no it's not" schisms. "Well do you prefer documentation or a REPL?"