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. In the folder src/bin, create a file called
  2. Add the following code, and run it with cargo run --bin hashmap:
1   use std::collections::HashMap; 
3 fn main() {
4 // The HashMap can map any hashable type to any other
5 // The first type is called the "key"
6 // and the second one the "value"
7 let mut tv_ratings = HashMap::new();
8 // Here, we are mapping &str to i32
9 tv_ratings.insert("The IT Crowd", 8);
10 tv_ratings.insert("13 Reasons Why", 7);
11 tv_ratings.insert("House of Cards", 9);
12 tv_ratings.insert("Stranger Things", 8);
13 tv_ratings.insert("Breaking Bad", 10);
15 // Does a key exist?
16 let contains_tv_show = tv_ratings.contains_key("House of
17 println!("Did we rate House of Cards? {}", contains_tv_show);
18 let contains_tv_show = tv_ratings.contains_key("House");
19 println!(&quot...