[Dev] collections and notifications meetup

[John Anderson]

I misunderstood you, I did know the order changes when the index is 
added, but I thought you said it changes after the index is added. We 
ran into that problem in 0.6 when the order of items in the summary view 
randomly changed when an index was added. I agree it would be nice if 
the order of a numeric index matched the order of the ref collection.

John


Morgen Sagen wrote:
> Morgen Sagen wrote:
>> A small detail we need to fix:  ListCollection doesn't maintain its 
>> intrinsic sort order after an index has been added.
>
> On Feb 9, 2006, at 6:33 AM, John Anderson wrote:
>> I haven't seen this. The summary view's use numeric indexes and they 
>> maintain intrinsic order. What situations are you seeing this not work?
>
> Create a ListCollection (with no index) and add items to it.  Iterate 
> that collection and you will happen to get the items back in the order 
> in which they were added.  Add an index to the collection.  Iterate 
> the collection again and you will get back the items not in the 
> original as-added order, but in the order they appear in the index.  
> Andi explained exactly why this happens -- since ListCollection is 
> based on a Set it really has no intrinsic order, and you can't count 
> on getting items back in the as-added order.  I think it would be nice 
> if ListCollections did maintain their order.
>
> ~morgen
> _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
>
> Open Source Applications Foundation "Dev" mailing list
> http://lists.osafoundation.org/mailman/listinfo/dev