title: objective-c multi-dimensional array
body: <p>I want to use a variable-sized multi-dimensional array in my app to save data.  The data structure I want to use is as below, the first element in each  row is followed by corresponding multiple values.  </p>
  
  <pre><code> array = {   {a, a_val1, a_val2, a_val3}.  
               {b, b_val1},  
               {c, c_val1, c_val2, c_val3, c_val4, c_val5}  
           }
  </code></pre>
  
  <p>Any idea how I can implement in objective-c?</p>