October 2012
Beginner
471 pages
10h 50m
English
Content preview from Programming F# 3.0, 2nd EditionBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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Chapter 8. Applied Object-Oriented Programming
This chapter could also be called “being functional in an object-oriented world.” By now you’ve mastered the F# syntax and style, but there is still plenty to be said about using F# in the object-oriented landscape of the .NET platform.
In this chapter, you learn how to create F# types that integrate better with other object-oriented languages like C#. For example, with operator overloading, you can allow your types to be used with symbolic code. Also, events enable your classes to notify consumers to receive notifications when certain actions occur. This not only enables you to be more expressive in your F# code, but also reduces the friction with non-F# developers when sharing your code.
Operators
A symbolic notation for manipulating objects can simplify your code by
eliminating methods like Add and
Remove, and instead using more
intuitive counterparts like + and
-. Also, if an object represents a
collection of data, being able to index directly into it with the .[ ] or .[expr .. expr] notation can make it much easier to access the
data an object holds.
Operator Overloading
Operator overloading is a term used for adding new meaning to an existing operator,
like + or -. Instead of only working on primitive types,
you can overload those operators to accept custom
types you create. Operator overloading in F# can be done by simply
adding a static method to a type. After that, you can use the operator as if it natively supported the type. The ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.