Cheatsheet recap

One line per idea, in order. The pause-for-questions slide.

Idea	Remember
A function that remembers	a closure remembers where it was born.
From function to closure	\|args\| body. that's the whole shape.
Three ways to capture	how you use a capture picks the trait.
Fn, FnMut, FnOnce	every fn is an fnmut is an fnonce.
An iterator is one method	a for loop is next() until none.
iter, iter_mut, into_iter	the same three modes as closures.
Adapters take closures	adapters return iterators. chain as many as you like.
Iterators are lazy	nothing runs until a consumer asks.
A real pipeline	describe the pipeline. rust runs it as one tight loop.
Consumers end the chain	a consumer is the thing that asks.
Zero-cost abstractions	high-level to read. low-level to run.

All slides