gistfile1.m

int toIndex=0;
[self.tableView beginUpdates];
for (NSDictionary* reddit in sortedReddits) {
    NSString *displayName = [reddit valueForKeyPath:@"data.display_name"];
    NSUInteger fromIndex =
    [_reddits indexOfObjectPassingTest:^BOOL(NSDictionary *obj, NSUInteger idx, BOOL *stop) {
        if ([[obj valueForKeyPath:@"data.display_name"] isEqualToString:displayName] ) {
            *stop = YES;
            return YES;
        }
        return NO;
    }];
    NSAssert(fromIndex != NSNotFound, @"");
    if (fromIndex != toIndex) {
        [self.tableView moveRowAtIndexPath:[NSIndexPath indexPathForRow:fromIndex inSection:0]
                               toIndexPath:[NSIndexPath indexPathForRow:toIndex inSection:0]];
    }
    toIndex++;
}
_reddits = [sortedReddits mutableCopy];
[self.tableView endUpdates];