Re: Sorting problem

OK, I think I've solved this.

The problem is not that the sortArrayUsingKeyOrderArray() doesn't call
my method - it's that it doesn't necessarily sort in-place, which is
what it's supposed to do.  It sometimes creates a new list and updates
the fed-in ref to point to this.

This threw me off as I also used a cached reference to the array
(assuming it would be valid post-sort i.e. sorted in place!), which
didn't point to the sorted list after the sort.  Solved by updating
this cached ref just after sorting.

I've not fully investigated this, but it looks like using a derived
attribute can cause this - I've not found this to happen using normal
attribs.  So far I've found that if the derived method returns an
'int', this problem occurs, while a 'String' works as it should.

Has anyone else found this 'feature'?

John




--- In [email protected], "jbs_mailuk"
<jbs_mailuk@y...> wrote:
> Hi!
> 
> I'm trying to sort an array of objects (in an NSMutableArray) by
using
> EOSortOrdering.sortArrayUsingKeyOrderArray().
> 
> I can do this easily on normal attributes.  However, I need to sort
on
> a derived attribute, i.e. a method.  In this case, myValue().
> 
> Where do I put this method?  I've tried putting it in the myObject
> class as public, but it's not being called by the sort.  I've tried
> variations such as getMyValue() and private _myValue() and
> _getMyValue(), but so far no joy.  The docs say it should be
possible,
> but I'm clearly missing out something necessary.
> 
> Any ideas?
> 
> TIA,
> John




 
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