Re: Iterators?

Harry Fuecks wrote:

In case anyone is wondering, took my shot at explaining Iterators here: http://www.phppatterns.com/index.php/article/articleview/50/1/1/

Site was down at the moment.. - considering the example below, It's pretty clear that classic iterators are not that usefull. as they are provided by the language. It would be vaugely useful to define Iterator (and a few other) 'interfaces' as abstract standards - for PHP5. eg. abstract class Interfaces_Iterator { abstract function next(); ..... } Downside is that it does add an extra dependancy with no real 'runtime' value.. - I guess in PHP5 we could do something like.. function __autoload($x) { if ($in_production && substr($x,0,8) == 'Interface') { class $x extends StdClass {} return; } .. otherwise load the interface... } Regards Alan

On a side note, seems Java is borrowing from PHP's foreach{} (OK - no proof that they got the idea from PHP but interesting anyway). There's an interesting interview (http://java.sun.com/features/2003/05/bloch_qa.html) about Java 1.5. The queston about "enhanced for"... The old Java way; void cancelAll(Collection c) { for (Iterator i = c.iterator(); i.hasNext(); ) {

       TimerTask tt = (TimerTask) i.next();
       tt.cancel();

} } With 1.5 Java way; void cancelAll(Collection c) { for (Object o : c)

       ((TimerTask)o).cancel();

}

Looks like a foreach...

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