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The Complete Rust Programming Reference Guide

You're reading from   The Complete Rust Programming Reference Guide Design, develop, and deploy effective software systems using the advanced constructs of Rust

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Product type Course
Published in May 2019
Publisher Packt
ISBN-13 9781838828103
Length 698 pages
Edition 1st Edition
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Concepts
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Authors (3):
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Vesa Kaihlavirta Vesa Kaihlavirta
Author Profile Icon Vesa Kaihlavirta
Vesa Kaihlavirta
Rahul Sharma Rahul Sharma
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Rahul Sharma
Claus Matzinger Claus Matzinger
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Claus Matzinger
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Table of Contents (29) Chapters Close

Title Page
Copyright
About Packt
Contributors
Preface
1. Getting Started with Rust FREE CHAPTER 2. Managing Projects with Cargo 3. Tests, Documentation, and Benchmarks 4. Types, Generics, and Traits 5. Memory Management and Safety 6. Error Handling 7. Advanced Concepts 8. Concurrency 9. Metaprogramming with Macros 10. Unsafe Rust and Foreign Function Interfaces 11. Logging 12. Network Programming in Rust 13. Building Web Applications with Rust 14. Lists, Lists, and More Lists 15. Robust Trees 16. Exploring Maps and Sets 17. Collections in Rust 18. Algorithm Evaluation 19. Ordering Things 20. Finding Stuff 21. Random and Combinatorial 22. Algorithms of the Standard Library 1. Other Books You May Enjoy Index

Strings


In Chapter 1, Getting Started with Rust, we mentioned that strings are of two types. In this section, we'll give a clearer picture on strings, their peculiarities, and how they differ from strings in other languages.

While other languages have a pretty straightforward story on string types, the String type in Rust is one of the tricky and uneasy types to handle. As we know, Rust places distinction on whether a value is allocated on the heap or on the stack. Due to that, there are two kinds of strings in Rust: owned strings (String) and borrowed strings (&str). Let's explore both of them.

 

Owned strings – String

The String type comes from the standard library and is a heap-allocated UTF-8 encoded sequence of bytes. They are simply Vec<u8> under the hood but have extra methods that are applicable to only strings. They are owned types, which means that a variable that holds a String value is its owner. You will usually find that String types can be created in multiple ways, as...

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