Book Image

Rust Standard Library Cookbook

By : Jan Hohenheim, Daniel Durante
Book Image

Rust Standard Library Cookbook

By: Jan Hohenheim, Daniel Durante

Overview of this book

Mozilla’s Rust is gaining much attention with amazing features and a powerful library. This book will take you through varied recipes to teach you how to leverage the Standard library to implement efficient solutions. The book begins with a brief look at the basic modules of the Standard library and collections. From here, the recipes will cover packages that support file/directory handling and interaction through parsing. You will learn about packages related to advanced data structures, error handling, and networking. You will also learn to work with futures and experimental nightly features. The book also covers the most relevant external crates in Rust. By the end of the book, you will be proficient at using the Rust Standard library.
Table of Contents (12 chapters)

How to do it...

  1. Create a Rust project to work on during this chapter with cargo new chapter-one
  2. Navigate to the newly created chapter-one folder. For the rest of this chapter, we will assume that your command line is currently in this directory
  3. Inside the src folder, create a new folder called bin
  4. Delete the generated file, as we are not creating a library
  5. In the src/bin folder, create a file called
  6. Add the following code and run it with cargo run --bin concat:
1  fn main() {
2 by_moving();
3 by_cloning();
4 by_mutating();
5 }
7 fn by_moving() {
8 let hello = "hello ".to_string();
9 let world = "world!";
11 // Moving hello into a new variable
12 let hello_world = hello + world;
13 // Hello CANNOT be used anymore
14 println!("{}", hello_world); // Prints "hello world!"
15 }
17 fn by_cloning() {
18 let hello = "hello ".to_string();
19 let world = "world!";
21 // Creating a copy of hello and moving it into a new variable
22 let hello_world = hello.clone() + world;
23 // Hello can still be used
24 println!("{}", hello_world); // Prints "hello world!"
25 }
27 fn by_mutating() {
28 let mut hello = "hello ".to_string();
29 let world = "world!";
31 // hello gets modified in place
32 hello.push_str(world);
33 // hello is both usable and modifiable
34 println!("{}", hello); // Prints "hello world!"
35 }