Writing Purely Functional Code in C#

By Zoran Horvat
Learn where .NET development is heading and what mindset you'll need in the future to master multi-paradigm programming with C#.
Course info
Level
Advanced
Updated
May 23, 2018
Duration
4h 15m
Table of contents
Understanding the Need for Discriminated Unions
Introducing Functional Concepts to C# 5m What Follows in This Course 5m Understanding Object-style Inheritance 5m Understanding Discriminated Unions 5m Until Discriminated Unions Arrive 5m Summary 2m
Treating Functions as Objects, Big Time
Working with First-order Functions Only 5m Understanding the Limitations of First-order Functions 3m Hiding Dependencies Behind Higher-order Functions 7m Building Larger Features with Function Composition 6m Completing the Implementation 2m Hiding Implementation Behind Partial Function Application 7m Summary 3m
Attaining Truly Functional Functions
Reworking the Example in F# 7m Understanding Partial Function Application 5m Understanding Delegates and Closures 6m Understanding How Closures Operate 7m Summary 2m
Treating All Objects as Values
Introducing Values to Functions 7m Understanding the Hashing Principle 6m Implementing Generic Hashing 4m GetHashCode Must Produce a Stable Result 3m Understanding the Equivalence Relation 3m Implementing the Equivalence Relation in .NET 5m Implementing the Value Typed Semantic 2m Summary 2m
Controlling Execution Flow with Pattern Matching
Understanding Functional Control Flow 6m Preparing Ground for Pattern Matching 6m Matching Patterns with Chained Ternary Operators 4m Making the Data Model Support Pattern Matching 6m Pattern Matching with the Switch Instruction 6m Demonstrating the Power and Limitations of Switch 4m Summary 2m
Working with Sequences in a Functional Way
What Kind of List Are You? 6m List Comprehension in C# 5m Mapping Sequences in Functional Way 8m The Downside of Lazy Evaluation 4m Manually Forcing Eager IEnumerable<T> 5m Designing the Eager IEnumerable<T> 7m Summary 3m
Treating Sequences as Immutable Objects
Consuming Sequences 6m Reviewing Sequence Optimizations 3m Understanding Performance Penalties on Sequences 4m Introducing Immutable Collections 8m Introducing Single-element Operations on Sequences 6m Summary 2m Applying an Immutable Collection 4m
Composing Functions into Larger Behavior
Life Beyond Polymorphic Execution 4m Understanding Composition in Functional Languages 4m Life Beyond Object Composition 6m Function Composition in Object-oriented Code 4m Function Composition at Its Finest 6m Summary 4m Designing Composable Functions in C# 5m
Course Overview
Course Overview 2m
Description
Course info
Level
Advanced
Updated
May 23, 2018
Duration
4h 15m
Description

At the core of the latest C# language enhancements is a thorough knowledge of functional concepts applied to an object-oriented framework. In this course, Writing Purely Functional Code in C#, you’ll learn how to blend principles of functional programming into the plain C# code. First, you’ll learn what makes the distinction between pure functional and object-oriented code. Next, you’ll explore syntax and coding practices that will allow you to write pure functional code in C#. Finally, you’ll discover what makes this coding style better when compared to traditional object-oriented programming. When you’re finished with this course, you’ll have a foundational knowledge of functional programming in native object-oriented languages, which will help you as you move forward to writing shorter and cleaner business applications which are easier to maintain in the long run.

About the author
Zoran Horvat
About the author

Zoran Horvat is Principal consultant at Coding Helmet Consultancy, speaker and author of 100+ articles, and independent trainer on .NET technology stack.

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Section Introduction Transcripts
Section Introduction Transcripts

Course Overview
Hi, everyone. My name is Zoran Horvat and welcome to my course, Writing Purely Functional Code in C#. I'm a principal consultant at Coding Helmet with nearly two decades of experience developing business applications. During that time my coding and software design style has been constantly evolving, driven by the desire to produce short, readable, extendable, and above all, correct and maintainable code. In this course we are going to cover the latest advances in C# programming language syntax and practices. We will show how neatly functional programming style can fit into a modern object-oriented language, which C# definitely is. Some of the major topics that we will cover include: discriminated unions as opposed to class hierarchies, functions as opposed to class methods, pattern matching as opposed to flow control, immutable lists as opposed to data collections. By the end of this course you will know how to design composable domain models which are still easy and safe to extend and maintain in the long run. Before beginning this course you should be familiar with basic functional concepts. You can learn them from my previous course, Making Your C# Code More Functional. I hope you will join me on this journey to learn functional programming with the Writing Purely Functional Code in C# course at Pluralsight.

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