[online] filtering entities when $filter not supported by back end

programmatic filter.m

-(void)fetchContactsWithCompletion:(void(^)(NSArray *entities))completion {
    
    NSString *resourcePath = @"ContactCollection;
    
    [self scheduleRequestForResource:resourcePath withMode:SODataRequestModeRead withEntity:nil withCompletion:^(NSArray *entities, id<SODataRequestExecution> requestExecution, NSError *error) {
        
        if (entities) {
            
            NSMutableArray *completeEntities = [[NSMutableArray alloc] init];
            
            [entities enumerateObjectsUsingBlock:^(id<SODataEntity> obj, NSUInteger idx, BOOL *stop) {
                
                NSDictionary *properties = (id<SODataEntity>)obj.properties;
                NSString *company = (NSString *)[(id<SODataProperty>)properties[@"company"] value];
                NSString *function = (NSString *)[(id<SODataProperty>)properties[@"function"] value];
                
                if (company.length > 0 && function.length > 0) {
                    [completeEntities addObject:obj];
                }
            }];
            completion(completeEntities);
            
        } else {
            
            NSLog(@"did not get any entities, with error: %@", error);
        }
    }];
}