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. Open the Cargo.toml file that was generated earlier for you

  2. Under [dependencies], if you haven't done so already, add the following line:
serde_json = "1.0.8"
  1. If you want, you can go to the serde_json web page ( to check for the newest version and use that one instead
  2. In the bin folder, create a file called

  3. Add the following code and run it with cargo run --bin dynamic_json:

1    #[macro_use] 
2 extern crate serde_json;
4 use std::io::{self, BufRead};
5 use std::collections::HashMap;
7 fn main() {
8 // A HashMap is the same as a JSON without any schema
9 let mut key_value_map = HashMap::new();
10 let stdin = io::stdin();
11 println!("Enter a key and a value");
12 for input in stdin.lock().lines() {
13 let input = input.expect("Failed to read line");
14 let key_value: Vec<_> = input.split_whitespace().collect(...