Advanced ActionScript 3 with Design Patterns

Chapter 7. Iterator Pattern

<feature><title>In This Chapter</title>

• Understanding the Problems with Iteration 95

• Understanding Iterator Elements 97

• Using Iterators 101

• Using Null Iterators 102

• Summary 102

</feature>

Nearly every application uses collections. A collection is simply a group of organized data. ActionScript has lots of collections including standard types such as arrays and associative arrays as well as more sophisticated collections such as multidimensional arrays and custom collection data types. When working with collections, you will naturally need to access the elements of that collection. The Iterator pattern described in this chapter does all that while avoiding some of the pitfalls that other approaches to data access might present. ...