title: Compare and fetch objects stored in two NSDictionary
body: <p>How can i fetch objects that are not in first NSDictionary , but are in second ?  Below approach give me same object several times</p>
  
  <pre><code>  for (NSString *numCodetmp in numCodeForInsertingRow) {
                  for (NSString *numCodeInsertmp in numCode) 
                     if (![numCodetmp  isEqualToString:numCodeInsertmp])
                         NSLog(@"Equal : %@, %@ ",numCodetmp,numCodeInsertmp);
              }
  </code></pre>