News Feed

News Archive
Looking for more information on how to do PHP the right way? Check out PHP: The Right Way

Fabien Potencier's Blog:
Iterator or IteratorAggregate?
June 25, 2010 @ 12:09:44

Following up on two previous posts about iterators, Fabien Potencier is back with one more quick shot on iterator aggregation - a look what using iterator versus iteratoraggregate.

If you have ever used iterators in your code, you have probably implemented the Iterator interface. Objects of a class that implements Iterator can be iterated over with the foreach loop. [...] The IteratorAggregate interface is quite similar [to Iterator] (both interfaces implement Traversable) but creates an external Iterator. But when the iterator is based on an array, creating an external Iterator for this array gives you a more concise and more readable code.

His example code shows how, in implementing and IteratorAggregate, you can grab the instance of the Iterator even if it's based on an array.

1 comment voice your opinion now!
iterator iteratoraggregate comparison traversable interface

blog comments powered by Disqus

Similar Posts

Christian Schaefer's Blog: Simply iterate over XML with plain PHP using little memory and CPU

Mike\'s Blog: s/fluent/decorated

Ibuildings Blog: Implementing Iterators

Soledad Penades' Blog: Signs your PHP needs refactoring

Fabien Potencier's Blog: Iterator or IteratorAggregate?

Community Events

Don't see your event here?
Let us know!

deployment framework library podcast bugfix release package introduction voicesoftheelephpant opinion symfony language laravel series tips community install api list interview

All content copyright, 2014 :: - Powered by the Solar PHP Framework