Indexing Arrays
So far we've only seen arrays indexed by integers, but it is also permissible to use strings.
Sometimes these are called associative arrays, or hashes. They are helpful in situations
where you are collecting different types of information into one array. You could build
into your code a system where element zero is a name, element one is a location, and
element two is an occupation. Listing 5.3 is a more elegant way to accomplish this.
Listing 5.2 Adding to an Array