I thought this was the point of vec.drain(..).collect().

Cement is highly alkaline. If wet cement comes in contact with your skin, it can cause third degree chemical burns. So don’t write your name in wet cement like Bart Simpson.

I used to think “euthanasia” was a country.

I like this, but I would appreciate a definition of “the web environment” somewhere near the top.

I feel the same. I don’t like how people always recommend starter kits to Vim/Emacs beginners, for example. I think they’d actually learn something, if, at first, they did things the intended way.