But it only covers the very basics. Disclaimer: I've only scrolled through it, but the code snippets are all small. It does show an admirable amount of Rust's syntax, but it's not very discoverable, whereas the book is reasonably well structured (although not for novices, who have forgotten a specific term). The link also doesn't deal with larger programs: there's not an Rc<T> on the page, let alone something like an Arena and unsafe code, and it's really necessary for complex programs.
So, IMO: not better than the Rust book. It gives a first glance of Rust, something to accustom the eyes to a different syntax, but sidesteps the difficult bits, which can make transitioning so frustrating.
I have a lot of Rust articles[1] that go into a lot more depth. They're mostly adventures though, we learn about ICMP, ELF, file systems etc.
Some love that style (the detours, the stream of consciousness) and some can't stand it. The Rust book is excellent, and a completely different style — they're complementary!
I've favourited the article. It's a good complement to the Rust Book, which has more detail. This kind of summary doc is great for discovery, you skim it and you find something that you could have written differently, or you realise there's an idiom you weren't using.
It's your opinion and I'm not arguing: a lot of people love the Rust book, but some (including me) simply can’t read it because of the style of writing and cases when you discover some interesting and deep topic but the author just gives 1 example in 5-10 lines of code and that's all. I think that things like Mutexes or Boxes are deep enough to have 30-50 pages dedicated to them, and I can say this not only about Mutexes and Boxes. When explaining some powerful things, one need not only explain how they work, but also what kinds of real tasks they can solve - ways of usage are obvious for you when you know it and have experience of usage them, but absolutely opaque and not obvious when you reading about them for the first time.
I highly recommend Jon Gjenset's streams for more advanced Rust concepts like lifetimes or interior mutability. He goes into depth explaining how they work, what kinds of problems they solve, and gives tons of great examples.
So, IMO: not better than the Rust book. It gives a first glance of Rust, something to accustom the eyes to a different syntax, but sidesteps the difficult bits, which can make transitioning so frustrating.