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

Fuck, I just cleared my history.

Can somebody please tell me what history -c is?

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.