While I like that the article introduces a new concept from C++17, namely the `extract()` member, I think the article is misnamed: it only deals with weird & bu

While I like that the article introduces a new concept from C++17, namely the `extract()` member, I think the article is misnamed: it only deals with weird & buggy behaviour that you get when incorrectly dealing with associative containers. This is not restricted to C++, though, and I would summarize the main message as: "Take care when changing that over which you iterate" That is something notably different than claiming that these are the 'Worst bugs' you could find...