Haskell Design Patterns - Ryan Lemmer

Haskell Design Patterns

By Ryan Lemmer

  • Release Date - Published: 2015-11-06
  • Book Genre: Programming
  • Author: Ryan Lemmer
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Haskell Design Patterns Ryan Lemmer read online review & book description:

Take your Haskell and functional programming skills to the next level by exploring new idioms and design patterns

About This Book
Explore Haskell on a higher level through idioms and patternsGet an in-depth look into the three strongholds of Haskell: higher-order functions, the Type system, and Lazy evaluationExpand your understanding of Haskell and functional programming, one line of executable code at a time
Who This Book Is For

If you're a Haskell programmer with a firm grasp of the basics and ready to move more deeply into modern idiomatic Haskell programming, then this book is for you.

What You Will Learn
Understand the relationship between the “Gang of Four” OOP Design Patterns and HaskellTry out three ways of Streaming I/O: imperative, Lazy, and Iteratee basedExplore the pervasive pattern of Composition: from function composition through to high-level composition with LensesSynthesize Functor, Applicative, Arrow and Monad in a single conceptual frameworkFollow the grand arc of Fold and Map on lists all the way to their culmination in Lenses and Generic ProgrammingGet a taste of Type-level programming in Haskell and how this relates to dependently-typed programmingRetrace the evolution, one key language extension at a time, of the Haskell Type and Kind systemsPlace the elements of modern Haskell in a historical framework
In Detail

Design patterns and idioms can widen our perspective by showing us where to look, what to look at, and ultimately how to see what we are looking at. At their best, patterns are a shorthand method of communicating better ways to code (writing less, more maintainable, and more efficient code).

This book starts with Haskell 98 and through the lens of patterns and idioms investigates the key advances and programming styles that together make "modern Haskell". Your journey begins with the three pillars of Haskell. Then you'll experience the problem with Lazy I/O, together with a solution. You'll also trace the hierarchy formed by Functor, Applicative, Arrow, and Monad. Next you'll explore how Fold and Map are generalized by Foldable and Traversable, which in turn is unified in a broader context by functional Lenses. You'll delve more deeply into the Type system, which will prepare you for an overview of Generic programming. In conclusion you go to the edge of Haskell by investigating the Kind system and how this relates to Dependently-typed programming.

Style and approach

Using short pieces of executable code, this guide gradually explores the broad pattern landscape of modern Haskell. Ideas are presented in their historical context and arrived at through intuitive derivations, always with a focus on the problems they solve.

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