Book Image

Haskell Cookbook

Book Image

Haskell Cookbook

Overview of this book

Haskell is a purely functional language that has the great ability to develop large and difficult, but easily maintainable software. Haskell Cookbook provides recipes that start by illustrating the principles of functional programming in Haskell, and then gradually build up your expertise in creating industrial-strength programs to accomplish any goal. The book covers topics such as Functors, Applicatives, Monads, and Transformers. You will learn various ways to handle state in your application and explore advanced topics such as Generalized Algebraic Data Types, higher kind types, existential types, and type families. The book will discuss the association of lenses with type classes such as Functor, Foldable, and Traversable to help you manage deep data structures. With the help of the wide selection of examples in this book, you will be able to upgrade your Haskell programming skills and develop scalable software idiomatically.
Table of Contents (13 chapters)

Introduction

The fact that Haskell is a pure language, that is, there are no unintended side effects, helps a lot in parallel and concurrent programming. The library and compiler both have a lot of options for optimizing and tuning the performance since it can (mostly!) correctly guess the intention of the program and how a program can be tuned to run concurrently.

Haskell gives a set of primitives for concurrent programming. These primitives enable programmers to build concurrency around them. These basic primitives are IORef, MVar, and STM. In this chapter, we will start with primitives, and then also work with strategies, and monad-par libraries which are built around these primitives to provide a higher-level abstraction for specifying concurrency within a program.

With the Cloud Haskell library, we move into the distributed world. In Cloud Haskell, we create logical nodes...