April 2006
Intermediate to advanced
480 pages
8h 32m
English
Content preview from Design Patterns in Java™, Second Edition
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28 Iterator
WHEN YOU EXTEND a codebase by adding a new type of collection, you may find that you need to extend your extension by adding an iterator. This chapter examines the particular case of iterating over a composite. In addition to iterating over new types of collections, the topic of iterating in a multithreaded environment brings up a number of interesting problems that warrant review. Simple as it seems, iteration is not a completely solved problem.
The intent of the ITERATOR pattern is to provide a way to access the elements of a collection sequentially.
Ordinary Iteration
Java has several approaches to iteration:
• For, while, and repeat loops, typically using integer indexes
• The Enumeration class (in java.util ...
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I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.