Book Image

Hands-On Functional Programming in Rust

By : Andrew Johnson
Book Image

Hands-On Functional Programming in Rust

By: Andrew Johnson

Overview of this book

Functional programming allows developers to divide programs into smaller, reusable components that ease the creation, testing, and maintenance of software as a whole. Combined with the power of Rust, you can develop robust and scalable applications that fulfill modern day software requirements. This book will help you discover all the Rust features that can be used to build software in a functional way. We begin with a brief comparison of the functional and object-oriented approach to different problems and patterns. We then quickly look at the patterns of control flow, data the abstractions of these unique to functional programming. The next part covers how to create functional apps in Rust; mutability and ownership, which are exclusive to Rust, are also discussed. Pure functions are examined next and you'll master closures, their various types, and currying. We also look at implementing concurrency through functional design principles and metaprogramming using macros. Finally, we look at best practices for debugging and optimization. By the end of the book, you will be familiar with the functional approach of programming and will be able to use these techniques on a daily basis.
Table of Contents (12 chapters)

Functional Control Flow

The control flow is the most basic building block of programming. Early languages had no concept of data structures or functions, only program flow. These control flow structures have evolved over time, from simple branches and loops to the complex value expressions available in Rust.

In this chapter, we will start developing the project that will form the basis of all code examples in this book. The first project's requirements are introduced immediately. Then, we will provide you with actionable steps to transform project requirements into a code outline with tests. Lastly, we will develop code for the full deliverable.

Learning outcomes:

  • Gathering project requirements
  • Architecting a solution based on project requirements
  • Using and recognizing expressions in functional style
  • Testing the solution with integration and unit tests
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