title: Set NSArray value when array is contained in an NSDictionary?
body: <p>I want to SET items in an array in a dictionary.
  I have an NSDictionary below, an instance called"currentCityNode".  In that Dictionary is an array item (amongst other things).  The array item is called "TheConnections"
  The code below successfully reads the array.</p>
  
  <pre><code> NSArray *theConnectionsArray = [currentCityNode objectForKey:@"TheConnections"];
   (theConnectionsArray now contains the previously loaded values '3','7', and '9')
  </code></pre>
  
  <p>Now I want to set ONE of the values in this array.  Make the second value '7' a '5'.</p>
  
  <p>I have tried a few variations, not able to get it yet.</p>
  
  <pre><code>[currentCityNode addObject:notsurewhattoputhere forKey:@"TheConnections"];
  </code></pre>