JavaScript Absolute Beginner’s Guide

17. Extending Built-in Objects

In This Chapter

• Extend your objects’ functionality

• Learn more about the prototype chain

As you know very well by now, JavaScript comes from the factory with a good supply of built-in objects. These objects provide some of the core functionality for working with text, numbers, collections of data, dates, and a whole lot more. As you become more familiar with JavaScript and start doing interesting-er and cleverer things, you’ll often find that you want to do more and go farther than what the built-in objects allow.

Let’s take a look at an example of when something like this might occur. Below is an example of how you can shuffle the contents of an array:

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function shuffle(input) ...