There are some code snippets and patterns of thought that prove time and again to be the bread and butter of a certain programming language. We will start this book by looking at a handful of such techniques in Rust. They are so quintessential for elegant and flexible code that you will use at least some of them in just about any project you tackle.

The next chapters will then build on this foundation and work hand in hand with Rust's zero costs abstractions, which are as powerful as the ones in higher-level languages. We are also going to look at the intricate inner aspects of the standard library and implement our own similar constructs with the help of fearless concurrency and careful use of unsafe blocks, which enable us to work at the same low level that some system languages, such as C, operate at.