title: NSDictionary VS NSArray+NSPredicate: which is faster/recommented
body: <p>What is faster getting to an object from a collection?</p>
  
  <p>a. Searching in an NSDictionary with <code>[dictionary objectForKey:key];</code>
  or</p>
  
  <p>b. Searching in an NSArray with <code>[NSPredicate predicateWithFormat:@"someKey like %@",someKeyValue];</code></p>
  
  <p>In both cases  I create the collections.</p>
  
  <p>Regards!</p>