Ahh, well, it turns out that I had the code right in the first place. Here it is if anyone needs to do the same thing.
BOOL isItemPresentWithIdenticalValue = NO; NSArray *allObjects = [self.geofenceObjects allValues]; NSArray *allOccurrencesOfSourceValue = [allObjects valueForKey:@"smi" ]; isItemPresentWithIdenticalValue = [allOccurrencesOfSourceValue containsObject:thingWeAreCheckingFor] ; On Jul 13, 2015, at 10:35 AM, Alex Zavatone wrote: > Hi all. I've got a dictionary of objects that contain properties and need to > check if one object has a certain value. > > I was thinking I could use collection operators and build an array where the > value of an an object's property matches that I'm looking for. > > Then if the array contains that value, we have a match. > > If each objects in the array has a bunch of properties and one of those > properties is called "thing", how would I build an array where the contents > of thing would equal a certain value? > > I'm sure I could walk the array, but I expect there is a more efficient > method already built in to Cocoa for this. > > Thanks in advance. > > Alex Zavatone > _______________________________________________ > > Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) > > Please do not post admin requests or moderator comments to the list. > Contact the moderators at cocoa-dev-admins(at)lists.apple.com > > Help/Unsubscribe/Update your Subscription: > https://lists.apple.com/mailman/options/cocoa-dev/zav%40mac.com > > This email sent to z...@mac.com _______________________________________________ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com