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 crate is pretty small and simple. With glob(...), you can create an iterator over all matching files by specifying a glob pattern. If you aren't familiar with them but remember the regex recipe from earlier (in the Querying with regexes section in Chapter 1Learning the Basics), think of them as very simplified regexes used primarily for filenames. Its syntax is nicely described on Wikipedia:

As with WalkDir before, the glob iterator returns a Result because the program might not have the permissions to read a filesystem entry. Inside the Result sits a Path, which we also touched on in the last recipe. If you want to read the contents of the file, refer to the first recipe in this chapter, which deals with file manipulation.

With glob_with, you can specify a MatchOptions instance to change the way glob searches for files. The most useful options you can toggle are:

  • case_sensitive: This...