Finding Intersection of NSMutableArrays

Question

I have three NSMutableArray containing names that are added to the lists according to different criterieas.

Here are my arrays pseudocode:

NSMutableA         


        

Answer 1

Here is a working variant from links above

NSPredicate *intersectPredicate = [NSPredicate predicateWithFormat:@"SELF IN %@", @[@500, @400, @600]];
NSArray *intersect = [@[@200, @300, @400] filteredArrayUsingPredicate:intersectPredicate];