January 2017
Beginner to intermediate
550 pages
10h 6m
English
Content preview from Object-Oriented JavaScript - Third 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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Summary
In Chapter 2, Primitive Data Types, Arrays, Loops, and Conditions, you saw that there are five primitive data types (number, string, Boolean, null, and undefined), and we also said that everything that is not a primitive piece of data is an object. Now, you also know that:
- Objects are like arrays, but you specify the keys
- Objects contain properties
- Properties can be functions (functions are data; remember
var f = function () {};). Properties that are functions are also called methods - Arrays are actually objects with predefined numeric properties and an auto-incrementing
lengthproperty - Array objects have a number of convenient methods (such as
sort()orslice()) - Functions are also objects, and they have properties (such as
lengthandprototype ...
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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.