[I]nstead of focusing on one or two concepts, I'll try to go through as many Rust snippets as I can, and explain what the keywords and symbols they contain mean.
A polyfill of the JavaScript standard library, which supports: The latest ECMAScript standard; ECMAScript standard library proposals; Some WHATWG / W3C standards (cross-platform or closely related ECMAScript).
Bayesian Methods for Hackers : An intro to Bayesian methods + probabilistic programming with a computation/understanding-first, mathematics-second point of view.