Comments on Cocoa with Love: OrderedDictionary: Subclassing a Cocoa class clust...

You can't, because allKeys implementation is e...

2010-08-04T04:00:21.000-07:00

You can't, because allKeys implementation is eventually calling the keyEnumerator method.

Bob, I was thinking the same thing. I'm using...

2010-06-27T19:44:54.000-07:00

Bob, I was thinking the same thing. I'm using an NSDictionary of NSDictionaries and using keysSortedByValueUsingSelector with various selectors (@selector(compareByAge:), @selector(compareByHeight:), etc).

I actually found some code that does exactly that (look at the last few lines)
http://svn.gna.org/svn/gnustep/apps/gworkspace/trunk/GWMetadata/Preferences/CategoriesEditor.m

@implementation NSDictionary (CategorySort)

- (NSComparisonResult)compareAccordingToIndex:(NSDictionary *)dict
{
NSNumber *p1 = [self objectForKey: @"index"];
NSNumber *p2 = [dict objectForKey: @"index"];
return [p1 compare: p2];
}

@end

You should parse the va_list and add each object t...

2010-04-25T23:58:00.000-07:00

You should parse the va_list and add each object to the dictionary individually using setObject:forKey:.

If you want information about parsing a va_list have a look here:

http://cocoawithlove.com/2009/05/variable-argument-lists-in-cocoa.html

especially at the "Implementing variable arguments for your own methods" section.

Matt, thanks for the great post. I'm particula...

2010-04-25T23:37:11.000-07:00

Matt, thanks for the great post. I'm particularly interested in overriding the function, initWithObjectsAndKeys. Unfortunately, it takes a variable number of arrays, as denoted by the ellipsis in the function definition:

- (id)initWithObjectsAndKeys:(id)firstObject, ... {

Is there any way of passing the function parameters along to [dictionary initWithObjectsAndKeys...]?