title: seeing if an object exists at index[i] in NSMUtableArray
body: <p>People I'd like to see if an element at index[i] is not present in a different (or current ) array. 
  So for instance if my array looked somewhat like this </p>
  
  <p><code>[wer, wer4 , wer5 , werp , klo ..</code>.</p>
  
  <p>Then I would like to see if aExerciseRef.IDE ( which is "sdf" for instance ) does or does not exist at index[i].
  I assume I'd have to use some sort of iterator ..</p>
  
  <pre><code>for( int i = 0; i &lt; 20; i++ )
  {
     if([instruct objectAtIndex:index2 + i] != [instruct containsObject:aExerciseRef.IDE] )                       
     NSLog(@"object doesn't exist at this index %i, i );
     else
     NSLog(@"well does exist")
  }
  </code></pre>
  
  <p>I know this doesn't work , it's just to elaborate what I'd like to achieve.</p>
  
  <p><strong>edit:</strong></p>
  
  <p>I'm going to try to elaborate it a little more and be more specific.</p>
  
  <p><strong>1)</strong> First of all aExerciseRef.IDE changes everytime it get's called so one time it is "ret" another time it's "werd".</p>
  
  <p><strong>2)</strong> Imagine an array being filled with aExerciseRef.IDE's  then I would like to compare if the elements in this array exist in the instruct array. </p>
  
  <p>So I would like to see if the element at let's say position 2 (wtrk)</p>
  
  <pre><code>[wer, wtrk, wer , sla ... 
  </code></pre>
  
  <p>exists in the array which was being filled with the aExerciseRef.IDE's. </p>
  
  <p>I hope I've been more clear this time. </p>