Re: NSDictionaryController with NSTableView and sorting of numeric data

FROM : jonathan@mugginsoft.com
DATE : Fri May 16 14:03:38 2008

Thanks For the reply Kyle

On 16 May 2008, at 06:43, Kyle Sluder wrote:

> On Thu, May 15, 2008 at 5:30 PM,  <<email_removed>> wrote:

>> It would seem that NSDictionaryController keys have to be strings.

>
> Yes.  It is very common that, despite NSDictionary accepting any
> object as a key, you must use NSString keys.
>

>> So the sorting of numeric string keys is always going to be 
>> alphabetic.

>
> Not true.  See -[NSString compare:options:] with the NSNumericSearch 
> option.


Good to be directed towards this method. I had missed the 
NSNumericSearch option.

>
>

>> My solution was to discard NSDictionaryController and create a 
>> proxy object
>> containing two properties:

>
> I would instead suggest subclassing NSDictionaryController and
> overriding -arrangedObjects.  The naive implementation would call
> super's implementation and return a sorted version of the result.  The
> published interface says that -arrangedObjects returns id, but the
> documentation says that it returns an array, so I would feel
> reasonably safe treating the return value as an NSArray.


That's a much more classy solution than my proxy object array kludge.

> --Kyle Sluder