title: How to store an NSArray in an NSDictionary?
body: <p>I'm trying to teach myself but am struggling with how to store something like an NSArray inside an NSDictionary.</p>
  
  <p>Let's say hypothetically you had a NSDictionary for recipes:</p>
  
  <p>Let's say the NSDictionary had keys like:</p>
  
  <p>Spaghetti,
  Fettucine Alfredo,
  Grilled Chicken Salad</p>
  
  <p>And the NSDictionary had an NSArray which was simply a list of ingredients.</p>
  
  <p>I suppose the equivalent PHP code would be something like:</p>
  
  <pre><code>$['Spaghetti'] = array('Spaghetti Pasta', 'Spaghetti Sauce', 'Meatballs');
  $['Fettucine Alfredo'] = array('Fettucine Pasta', 'Alfredo Sauce');
  $['Grilled Chicken Salad'] = array('Lettuce', 'Grilled Chicken', 'Croutons');
  </code></pre>
  
  <p>I'm struggling with how I can add an NSArray to the NSDictionary. Then what if I wanted to remove an element or add an element to the array? How is it retrieved and deleted or added to?</p>