title: NSMutableArray: count is a method or a property?
body: <p>I want to verify if I'm in the last cell of the UITable.
  Should I use a NSInteger property in my controller and store the value of the count of the data (it's an NSMutableArray) that populates the table?</p>
  
  <p>I'm asking because I don't know if count iterates over all objects of the array to count or if it only gets me a value of a count property.</p>
  
  <p>What would be better ?</p>
  
  <p>store the value: myCount = [myArray count]<br>
  use directly: [myArray count]<br>
  store numberOfRows: myCount = numberOfRowsInSection:[indexPath 0]<br>
  use numberOfRows directly: numberOfRowsInSection:[indexPath 0]  </p>