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

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.

I had that once. I think it used to be much more secret than it is now, and was actually used to hire people for Google. Nowadays it’s more of a fun easter egg. I didn’t bother with any of it, because I couldn’t be bothered with Python or Java.