Chapter 5. Functions, Arrays, and Objects
In This Chapter
Making code manageable with functions
Passing parameters into functions
Returning values from functions
Examining functions and variable scope
Producing basic arrays
Retrieving data from arrays
Building a multi-dimensional array
Creating custom objects with properties and methods
Building object constructors
Building JSON data structures
It doesn't take long for your code to become complex. Soon enough, you'll find yourself wanting to write more sophisticated programs. When things get larger, you need new kinds of organizational structures to handle the added complexity.
You can bundle several lines of code into one container and give this new chunk of code a name. That's called a function. You can also take a whole bunch of variables, put them into a container, and give it a name. That's called an array.
This chapter shows you how to work with more code and more data — in the form of functions and arrays — without going crazy.
Breaking Code into Functions
It doesn't take long for code to get complicated. It would be good to have some sort of tool for managing the complexity and making code easier to handle. That's exactly what a concept called functions does for you.
Inviting ants to the picnic
Figure 5.1. Nothing reminds me of functions ...