Book Image

Rust Quick Start Guide

By : Daniel Arbuckle
Book Image

Rust Quick Start Guide

By: Daniel Arbuckle

Overview of this book

Rust is an emerging programming language applicable to areas such as embedded programming, network programming, system programming, and web development. This book will take you from the basics of Rust to a point where your code compiles and does what you intend it to do! This book starts with an introduction to Rust and how to get set for programming, including the rustup and cargo tools for managing a Rust installation and development work?ow. Then you'll learn about the fundamentals of structuring a Rust program, such as functions, mutability, data structures, implementing behavior for types, and many more. You will also learn about concepts that Rust handles differently from most other languages. After understanding the Basics of Rust programming, you will learn about the core ideas, such as variable ownership, scope, lifetime, and borrowing. After these key ideas, you will explore making decisions in Rust based on data types by learning about match and if let expressions. After that, you'll work with different data types in Rust, and learn about memory management and smart pointers.
Table of Contents (10 chapters)

Compiler errors involving generic type parameters

Our tree structure requires that the data type used for the key has to have the PartialOrd and PartialEq traits. The &str type happens to have those traits, so we can use an &str for the key:

let mut tree: Tree<&'static str, f32> = Tree::new();

tree.set("first key", 12.65);
tree.set("second key", 99.999);
tree.set("third key", -128.5);
tree.set("fourth key", 67.21);

println!("tree.get_ref(\"third key\") is {}", match tree.get_ref("third key") {
Err(_) => {println!("Invalid!"); &0.0},
Ok(x) => x,

Here, we've created a Tree<&'static str, f32>, or a tree that maps static strings to 32-bit floating point numbers. If we compile and run a complete program containing that snippet, everything works beautifully...