More Index Tricks

• You can "wrap around:"

$sides[0] = 'sweet potatoes';
$sides[1] = 'mac & cheese';
$sides[2] = 'apples';
print $sides[ -1 ];

• But you can't assign with negative indexes:

$sides[-4] = 'this will asplode';

• $#name gives you the last index used of the array:

print $#sides, "\n"; # prints 2