Understanding the Benefits of Iterators in Code

Iterators have plenty of usages, and this chapter describes them all in detail. Before studying the many ways iterators can be useful, though, a better idea is understanding why they allow you to write better and more responsive code. Imagine that you have a collection of items of type Person and a method that iterates through the collection the way you know. Listing 16.1 demonstrates how to reproduce this simple scenario in code.

LISTING 16.1 Iterating Through a Collection the Usual Way

Public Class Person    Public Property FirstName As String    Public Property LastName As String    Public Property Age As IntegerEnd ClassPublic Class People    Inherits List(Of Person) ...

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