Re: Finding the largest value in an NSTreeController?

FROM : Rick Mann
DATE : Sat May 31 22:12:16 2008

On May 31, 2008, at 12:05:58, I. Savant wrote:

> 1 - Create a fetch request for your desired entity.
> 2 - Create a sort descriptor for the key whose max value you're 
> interested in.
> 3 - Set the fetch request's sort descriptor to the above.
> 4 - Create any predicates needed for filtration (ie, whatever you 
> may or may not have used in the tree controller).
> 5 - Set the fetch request's predicate to the above if any.
> 6 - Execute the fetch request and get the last (or first) object of 
> the results (checking for errors, minding the set-versus-array 
> gotchas, etc.).



Wow, really? No way to just get at all the items in the tree 
controller with some key path, then use @max? It seems that this would 
be possible with an NSArray:

http://developer.apple.com/documentation/Cocoa/Conceptual/KeyValueCoding/Concepts/ArrayOperators.html#/
/apple_ref/doc/uid/20002176

TIA,

--
Rick