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

Chapter 8. Data Crunching – Data Transformation Patterns

After dealing with advanced patterns of the function definition and application in the previous chapter, I want to revisit the topic that was just slightly scratched in Chapter 6, Sequences - The Core of Data Processing Patterns in connection with sequences. There, I claimed that the quite bulky Collection.seq library absorbs and implements just a handful of universal data processing patterns. Then I regrouped the library members by assigning to one of these patterns.

This chapter digs deeper into these patterns of data transformation that are applicable not only to sequences, but also to other data collections. The goal of this chapter is to help you develop the skill to convey your data processing needs with functions belonging to a handful of typical polymorphic transformation categories composed of a handful of combinators, and by operating upon data collection types that are best suitable for the task at hand. This approach allows...