Book Image

F# 4.0 Design Patterns

By : Gene Belitski
Book Image

F# 4.0 Design Patterns

By: Gene Belitski

Overview of this book

Following design patterns is a well-known approach to writing better programs that captures and reuses high-level abstractions that are common in many applications. This book will encourage you to develop an idiomatic F# coding skillset by fully embracing the functional-first F# paradigm. It will also help you harness this powerful instrument to write succinct, bug-free, and cross-platform code. F# 4.0 Design Patterns will start off by helping you develop a functional way of thinking. We will show you how beneficial the functional-first paradigm is and how to use it to get the optimum results. The book will help you acquire the practical knowledge of the main functional design patterns, the relationship of which with the traditional Gang of Four set is not straightforward. We will take you through pattern matching, immutable data types, and sequences in F#. We will also uncover advanced functional patterns, look at polymorphic functions, typical data crunching techniques, adjusting code through augmentation, and generalization. Lastly, we will take a look at the advanced techniques to equip you with everything you need to write flawless code.
Table of Contents (20 chapters)
F# 4.0 Design Patterns
Credits
About the Author
Acknowledgements
About the Reviewer
www.PacktPub.com
Preface

Function composition


Function composition is perhaps the most fundamental skill to be mastered by a functional programmer. However simple it may sound, this is about combining some functions into a more powerful combination. This may sound close to the higher-order functions I have covered earlier, and it is close indeed. Function composition is just concentrating upon building chains of function applications that allow more powerful data transformations from the bunch of less complicated ones.

Combinators

How exactly does the function composition take place if, by definition, the functions considered the basis for composition are just sort of black boxes that can only consume arguments and produce results? This is correct; functions, arguments, and the single operation of an application are all that's required for composition (remember minimizing the moving parts). Still, composition is performed by functions as well. The function that somehow applies just its parameters or values (some of...