June 2016
Beginner to intermediate
292 pages
6h 8m
English
Content preview from Mastering JavaScript Object-Oriented ProgrammingBecome 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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Summary
This chapter focused on using duck typing instead of relying on type checking. We see how the dynamic nature of JavaScript and its type system do not allow us to process objects in a reliable way. The structure of an object can change dynamically and establishing the type of instance of an object that may be very difficult, for example, when multiple inheritance is applied. Therefore, we introduced the concept of a contract between objects and the support of interfaces provided by classical OOP languages.
Since JavaScript does not support interfaces, we explored the duck typing technique in order to describe and check the contract's compliance. Duck typing allows us to process objects focusing on how an object behaves instead of relying ...
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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.