Re^3: Iterator as a Class or Object Method

I'm hearing unsupported objections to passing coderefs to objects.

I will concede that this is not for the feint-of-heart - newbies find it difficult to fathom the concept, so, writers shouls probably provide an alternative interface for common goodies like File::Find.

The larger issue, as I see it, is that coderefs provide an elegant solution such as this one. Plenty of modules use filters as properties - either as regexen or coderefs.

To simplify caller understanding, I usually provide an alternative of pre-specifying the code-ref as an object property, then calling a method that will invoke the coderef.

Beyond personal preferences, and perceived complexity, is there a reason NOT to use coderefs ?

"Man cannot live by bread alone...
He'd better have some goat cheese and wine to go with it!"

Comment on Re^3: Iterator as a Class or Object Method

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Re^4: Iterator as a Class or Object Method by BUU (Prior) on Oct 03, 2005 at 21:26 UTC
Re: Are you looking at XML processing the right way? (merge) says it far better than I could.	[reply]
Re^5: Iterator as a Class or Object Method by Anonymous Monk on Oct 03, 2005 at 21:45 UTC
If the call-back interface is less capable than an iterator interface, then it is fundamentally broken. But it doesn't have to be that way. Towards the best collection traversal interface.	[reply]
Re^5: Iterator as a Class or Object Method by NetWallah (Canon) on Oct 04, 2005 at 00:05 UTC
That was an excellent descussion by the gods (BUU++). Point conceded. "Man cannot live by bread alone... He'd better have some goat cheese and wine to go with it!"	[reply]
Re^5: Iterator as a Class or Object Method by adrianh (Chancellor) on Oct 04, 2005 at 12:12 UTC
Re: Are you looking at XML processing the right way? (merge) says it far better than I could. That's tye (quite correctly) saying that callbacks are less flexible than iterators. That's not an argument for throwing the former away. C style for loops are more flexible that Perl style foreach loops - but I wouldn't want to do without the latter :-) If your iterating over everything in a Feed object 30 times in your code why not abstract that loop out? Iterators and callbacks are both useful interfaces. I wouldn't want to do without either.	[reply]