$#{ $ref }

##</code><code>##

$#$ref

##</code><code>##

$array[$i]  ${ $ref }[$i]    (also $ref->[$i])
@array      @{ $ref }
$#array     $#{ $ref }

##</code><code>##

Can't use string ("0") as an ARRAY ref while "strict refs" in use.