Search icon CANCEL
Subscription
0
Cart icon
Your Cart (0 item)
Close icon
You have no products in your basket yet
Arrow left icon
Explore Products
Best Sellers
New Releases
Books
Videos
Audiobooks
Learning Hub
Conferences
Free Learning
Arrow right icon
Arrow up icon
GO TO TOP
Functional C#

You're reading from   Functional C# Uncover the secrets of functional programming using C# and change the way you approach your applications

Arrow left icon
Product type Paperback
Published in Dec 2016
Publisher Packt
ISBN-13 9781785282225
Length 370 pages
Edition 1st Edition
Languages
Arrow right icon
Author (1):
Arrow left icon
Wisnu Anggoro Wisnu Anggoro
Author Profile Icon Wisnu Anggoro
Wisnu Anggoro
Arrow right icon
View More author details
Toc

Table of Contents (12) Chapters Close

Preface 1. Tasting Functional Style in C# 2. Walkthrough Delegates FREE CHAPTER 3. Expressing Anonymous Methods with Lambda Expressions 4. Extending Object Functionality with Extension Methods 5. Querying Any Collection Easily with LINQ 6. Enhancing the Responsiveness of the Functional Program with Asynchronous Programming 7. Learning Recursion 8. Optimizing the Code using Laziness and Caching Techniques 9. Working with Pattern 10. Taking an Action in C# Functional Programming 11. Coding Best Practice and Testing the Functional Code

Choosing between fluent syntax and query expression syntax


From our preceding discussion, we found two types of querying syntaxes so far. Let's discuss this further by distinguishing these two syntaxes.

IEnumerable<int> queryInt = 
  intList.Select(i => i * 2); 
int queryIntCount = queryInt.Count(); 

The preceding code snippet is the fluent syntax type. We invoke the Select and Count operators by invoking their extension method in the Enumerable class. Using the fluent syntax, we can also chain the method so it will approach functional programming as follows:

IEnumerable<int> queryInt = 
  intList 
    .Select(i => i * 2); 
    .Count(); 

Another syntax type we can use in querying data in LINQ is query expression syntax. We applied this syntax type when we discussed deferred execution in the previous topic. The code snippet of the query expression syntax is as follows:

IEnumerable<Member> memberQuery = 
  from m in memberList ...
lock icon The rest of the chapter is locked
Register for a free Packt account to unlock a world of extra content!
A free Packt account unlocks extra newsletters, articles, discounted offers, and much more. Start advancing your knowledge today.
Unlock this book and the full library FREE for 7 days
Get unlimited access to 7000+ expert-authored eBooks and videos courses covering every tech area you can think of
Renews at $19.99/month. Cancel anytime
Banner background image