my $array = TieVariable(); ### Pos1
print "### Initialization finished\n";
for (0..$#$array) {
   print "$_: $array->[$_]\n";
} # for
$array->[6] = 1000;

untie $array;
# ------------------------------------------------------------
sub TieVariable {
   tie my @array, 'Tie::Excel::Array';
   $array[$_] = 5 * $_ for 0..5;

   return \@array; ### Pos2
} # TieVariable

# ============================================================
package Tie::Excel::Array;

sub TIEARRAY {
   my( $class ) = @_;
   return bless [], $class;
} # TIEARRAY
# ------------------------------------------------------------
sub STORE {
   my( $self, $index, $value ) = @_;
   warn "STORE: \$self->[$index] = $value;\n";
   $self->[$index] = $value;
} # STORE
# ------------------------------------------------------------
sub FETCH {
   my( $self, $index ) = @_;
   warn "FETCH: \$self->[$index] = $self->[$index];\n";
   return $self->[$index];
} # STORE
# ------------------------------------------------------------
sub FETCHSIZE {
   my( $self ) = @_;
   return $#$self;
} # FETCHSIZE
# ------------------------------------------------------------
sub UNTIE {
   my( $self ) = @_;
   warn "UNTIE\n";
} # UNTIE
# ...