May 2012
Intermediate to advanced
768 pages
14h 39m
English
Content preview from Sams Teach Yourself C++ in One Hour a Day, Seventh 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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Lesson 21. Understanding Function Objects
Function objects or functors might sound exotic or intimidating, but they are entities of C++ that you have probably seen, if not also used, without having realized it. In this lesson, you learn
• The concept of function objects
• The usage of function objects as predicates
• How unary and binary predicates are implemented using function objects
The Concept of Function Objects and Predicates
On a conceptual level, function objects are objects that work as functions. On an implementation level, however, function objects are objects of a class that implement operator(). Although functions and function-pointers can also be classified as function objects, it is the capability of an object of a class that ...
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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.