if you've ever written a for loop like this, you'd see the exact same issue. for (i = 0, total = arr.length; i < total; i++) { item = arr[i]; }

if you've ever written a for loop like this, you'd see the exact same issue. for (i = 0, total = arr.length; i < total; i++) { item = arr[i]; } This will also iterate over gaps in the array. Is this a bug?