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

  1. What is the ternary operator?

The if condition is the ternary operator but has the unique Rust syntax of if a { b } else { c }.

  1. What is another name for unit tests?

Unit tests are also called whitebox testing.

  1. What is another name for integration tests?

Integration tests are also called blackbox testing.

  1. What is declarative programming?

Declarative programming avoids implementation details when describing a program.

  1. What is imperative programming?

Imperative programming focuses on implementation details when describing a program.

  1. What is defined in the iterator trait?

The iterator trait is defined by an associated Item type, and the required next method.

  1. In which direction will fold traverse the iterator sequence?

fold will traverse an iterator from left to right, or more specifically, from first to last.

  1. What is a dependency graph?

A dependency...