KVO for derived attributes (was Re: CoreData - calculations in tables?)
KVO for derived attributes (was Re: CoreData - calculations in tables?)
- Subject: KVO for derived attributes (was Re: CoreData - calculations in tables?)
- From: mmalcolm crawford <email@hidden>
- Date: Wed, 6 Jul 2005 14:44:19 -0700
On Jul 6, 2005, at 2:17 PM, Alan Dail wrote:
Now I have a related issue. I have another column that sums a
field in the array instead of simply counting the number of items
in the array. The same technique works to calculate the totals,
but the notifications only come on add/delete, they don't come when
an array member is changed - is there a way to do this. For
example, suppose in your example you wanted an averageGrade, how do
I set it up so this will stay current?
<http://www.cocoabuilder.com/archive/message/cocoa/2005/2/17/128441>
mmalc
_______________________________________________
Do not post admin requests to the list. They will be ignored.
Cocoa-dev mailing list (email@hidden)
Help/Unsubscribe/Update your Subscription:
This email sent to email@hidden