Remove NSNull objects from NSDictionary

NSDictionary+cleanNull

#import "NSDictionary+CleanNSNull.h"

@implementation NSDictionary (CleanNSNull)

-(NSDictionary *)cleanNull {
    return [self dictionaryWithValuesForKeys:[[self keysOfEntriesPassingTest:^BOOL(id key, id obj, BOOL *stop) {
        return ![obj isEqual:[NSNull null]];
    }] allObjects]];
}

@end