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 it works...

This recipe is going to be a bit longer than the others, because:

  • The vector is the most important collection
  • Many of its core principles, like preallocation, apply to other collections as well
  • It includes methods used on slices, which are also usable by many other collections

Let's start at the beginning.

A vector can be created [9] by using the constructor pattern we mentioned earlier (Chapter 1, Learning the Basics, Using the Constructor Pattern), and filled by calling push on it for every element we want to store [10]. Because this is such a common pattern, Rust provides you with a convenient macro called vec![3]. While its end effect is the same, the macro is implemented with some nice performance optimizations.

Because of the convenience vec! provides, other Rustacians have implemented similar macros for the other collections, which you can find here:

If you want to initialize a vector by repeating an element over and over...