- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section{
    return [courses count];
}

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath{
    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:@"cell"];
    if (nil==cell){
        cell = [[UITableViewCell alloc]
                                 initWithStyle:UITableViewCellStyleDefault reuseIdentifier:@"cell"];
    }

    NSString *currentCourseName=[courseKeys objectAtIndex:[indexPath row]];
    [[cell textLabel] setText:currentCourseName];
    NSLog(currentCourseName);
    CGSize size = [cell.textLabel.text sizeWithFont:cell.textLabel.font];
    CGFloat y = cell.contentView.frame.size.height / 2;

    UIView *line = [[UIView alloc] initWithFrame:CGRectMake(5,y,size.width, 3)];
    line.backgroundColor = [UIColor redColor];
    [cell.textLabel addSubview:line];

    return cell;

}