Open Radar

 
There’s something of a mismatch between SBElementArray and NSArray with regards predicates. For example, on SBElementArray, in order to pass in an enum value to the predicate’s format string, I have to use NSAppleEventDescriptor like so:

	NSAppleEventDescriptor *active = [NSAppleEventDescriptor descriptorWithEnumCode:OFProjectStatusActive];
	NSAppleEventDescriptor *onHold = [NSAppleEventDescriptor descriptorWithEnumCode:OFProjectStatusOnHold];
	NSArray *filteredProjs = [ofProjs filteredArrayUsingPredicate:[NSPredicate predicateWithFormat:@"status == %@ || status == %@", active, onHold]];

However, if I’ve already turned the SBElementArray into an NSArray (perhaps by calling -get, or by filtering it previously), I would not use NSAppleEventDescriptor, and instead would just pass in the enum values as integers. This is a mismatch, the exact same predicate should be able to filter an NSArray or an SBElementArray. I suggest that you allow integers in both cases, and handle the wrapping into NSAppleEventDescriptors yourselves in the SBElementArray case.