gistfile1.txt

    for (BNRNerd *nerd in self.nerds) {
        [self.geocodeQueue addOperationWithBlock:^{
            NSOperationQueue *managingQueue = [NSOperationQueue currentQueue];
            [geocoder geocodeAddressString:nerd.locationStr completionHandler:^(NSArray *placemarks, NSError *error) {
                CLPlacemark *placemark = placemarks[0];
                nerd.location = placemark.location;
                [self fetchWeatherForNerd:nerd];
                [managingQueue setSuspended:NO];
            }];
            [managingQueue setSuspended:YES];
        }];
    }