title: Copy NSMutablearray to another
body: <p>I am trying to copy <code>NSMutableArray</code> to another but it does not show me anything at the <code>UITableView</code>:</p>
  
  <pre><code>NSMutableArray *objectsToAdd= [[NSMutableArray alloc] initWithObjects:@"one",@"two"];
  
  NSMutableArray *myArray = [[NSMutableArray alloc] initWithObjects:objectsToAdd,nil];
  
  NSMutableArray *list = [[NSMutableArray alloc] init];
  
  [self.list addObjectsFromArray:myArray];
  </code></pre>
  
  <p>Nothing show up! What is wrong?</p>
  
  <p>It crashes my app because I do not have nil at my <code>NSMutableArray</code> how can I add nil to it? <code>addobject:nil</code> does not work it crashes the app:</p>
  
  <pre><code>static NSString * DisclosureButtonCellIdentifier = 
  @"DisclosureButtonCellIdentifier";
  
  UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier: 
                           DisclosureButtonCellIdentifier];
  if (cell == nil) {
      cell = [[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault 
                                     reuseIdentifier: DisclosureButtonCellIdentifier]
              autorelease];
  }
  NSUInteger row = [indexPath row];
  
  NSString *rowString =nil;
  
  rowString = [list objectAtIndex:row];
  
  
  cell.textLabel.text = rowString;
  
  cell.accessoryType = UITableViewCellAccessoryDetailDisclosureButton;
  [rowString release];
  return cell;
  </code></pre>