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What is the expected Cocoa API behavior in an incomplete object traversal?
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What is the expected Cocoa API behavior in an incomplete object traversal?


  • Subject: What is the expected Cocoa API behavior in an incomplete object traversal?
  • From: Tito Ciuro <email@hidden>
  • Date: Fri, 15 Oct 2010 16:42:32 -0300

Hello,

I'm implementing a method and I'm not sure what the behavior should be when detecting an anomaly.

Case in point: I have a method that iterates through an array of objects. As I traverse the array, I'm, checking whether the object in the array conforms to a custom protocol. If it does, everything is fine and I process it. However, if at some point I detect that the array contains a non-conforming object, what should the method do?:

a) skip the non-conforming object and continue processing and return a BOOL or fill an NSError?
b) stop processing and return a BOOL or fill an NSError?
c) throw an exception?

Since the method would end up processing less objects that the developer intended, I wonder what Cocoa developers would expect in this case...

Thanks,

-- Tito
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