title: how to define 2x2 array in ios?
body: <p>how to define 2x2 or 3X.. array in ios?
  like this</p>
  
  <pre><code>[name=john , age=21 , num=1]
  [name=max , age=25 , num=2]
  [name=petter , age=22 , num=3]
  </code></pre>
  
  <p>with columns
  in NSMutableArray you can only add rows with objects;
  i want this array[][]</p>