Matt Doyle | Elated Communications
Web and WordPress Development
In previous tutorials we’ve taken a look at JavaScript array basics, manipulating arrays, and sorting arrays. So far, all the arrays we’ve dealt with have been “flat” arrays; each array element contains a single value, such as a number, string, or object.
However, like most programming languages, JavaScript lets you create arrays inside arrays, known as nested arrays. In a nested array, the elements of one array are themselves arrays. For example:
One of the key features of all good programming languages is the ability to control the order in which actions are performed. For instance, you may want to run one piece of code if the user has selected a checkbox, but run a different piece of code if they haven’t selected it. Or, you may want to run the same piece of code 10 times (for example, if you’re creating a drop-down list with 10 items).
In this tutorial you’ll learn how to write code to make decisions (e.g. “if the user has selected this checkbox, display this message”), and perform the same action many times (called “looping”).
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