Web Programming with HTML5, CSS, and JavaScript

11.13 Arrays

Overview

Normal objects have different names for each of the object’s different data items. For example, a dog object has name, sound, and trick properties for its different data items. Now we’ll look at a special type of object that holds multiple data items and uses a common name for all of them. That special type of object is an array.

In the past, we’ve used the term collection to describe a group of items with a common name. An array is not only a special type of object; it’s also a special type of collection. Remember in the last chapter how we retrieved a collection of t-shirt color radio buttons using the following code?

tshirtRBs = form.elements["color"];

And then later, we used the tshirtRBs name to access individual ...