title: NSMutableArray enumerating objects
body: <p>How can I enumerate the values of the instances in this code through fast enumeration, It's returning addresses of the arrays, and also I feel like there is a short way for doing this. </p>
  
  <pre><code>BNRStockHolding *stockHolding = [[BNRStockHolding alloc] init];
  [stockHolding setPurchasedSharePrice:2.30];
  [stockHolding setCurrentSharePrice:4.50];
  [stockHolding setNumberOfShares:40];
  float p = [stockHolding purchasedSharePrice];
  float c = [stockHolding currentSharePrice];
  int n = [stockHolding numberOfShares];
  float cost = [stockHolding costInDollars];
  float val = [stockHolding valueInDollars];
  
  BNRStockHolding *stockHolding1 = [[BNRStockHolding alloc] init];
  [stockHolding setPurchasedSharePrice:12.19];
  [stockHolding setCurrentSharePrice:10.56];
  [stockHolding setNumberOfShares:90];
  float p1 = [stockHolding purchasedSharePrice];
  float c1 = [stockHolding currentSharePrice];
  int n1 = [stockHolding numberOfShares];
  float cost1 = [stockHolding costInDollars];
  float val1 = [stockHolding valueInDollars];
  
  BNRStockHolding *stockHolding2 = [[BNRStockHolding alloc] init];
  [stockHolding setPurchasedSharePrice:45.10];
  [stockHolding setCurrentSharePrice:49.51];
  [stockHolding setNumberOfShares:210];
  float p2 = [stockHolding purchasedSharePrice];
  float c2 = [stockHolding currentSharePrice];
  int n2 = [stockHolding numberOfShares];
  float cost2 = [stockHolding costInDollars];
  float val2 = [stockHolding valueInDollars];
  
  NSMutableArray *threeInstances = [NSMutableArray arrayWithObjects:
      stockHolding, stockHolding1, stockHolding2, nil];
  
  for(BNRStockHolding *d in threeInstances) {
      NSLog(@"%@", d);
  }
  </code></pre>