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...

In Chapter 2, Working with Collections; Using a Vector, we learned about Vec::retain, which filters a vector in place. On the nightly toolchain, this functionality has arrived in String and works the same way, as if a String was a Vec<char>—which, if you think about it, it really is.

The functionality of filtering a String was always there, but it required going over the string as an Iterator and creating a new String with the filtered characters; or worse yet, converting a String to a newly-created Vec<char>, using retain on it, and then converting the chars back into another newly-created String.