I like it, but I would make two suggestions 1) There are many memory schemas for the push_back example, maybe you want to organize them side-by-side with an ar

I like it, but I would make two suggestions 1) There are many memory schemas for the push_back example, maybe you want to organize them side-by-side with an arrow between them showing which statement caused the change. Saving some vertical space may do some good. 2) I'm not a fan of the sentence structure in many places. Needs more pith. Perhaps apply some Strunk & White and some K&R.