title: NSDictionary inside NSMutableArray (iOS)
body: <p>I need the following as a result:</p>
  
  <pre><code>(
  
      "some_key" = {
          "another_key" = "another_value";
      };
  
  );
  </code></pre>
  
  <p>In order to do so, I have this code, but it doesn't work:</p>
  
  <pre><code>NSDictionary *dictionary = [[NSDictionary alloc] initWithObjectsAndKeys:@"another_value", @"another_key", nil];
  NSMutableArray *array = [[NSMutableArray alloc] init];
  [array setValue:dictionary forKey:@"some_key"];
  </code></pre>
  
  <p>Any Idea? Thanks!</p>