my $x = ['a', 'b', 'c', 'd', 'e'];

my $i = $ x -> [ 4 ];
my $j = "$ x -> [ 4 ]";
my $k = "$x->[4]";
warn $i;
warn $j;
warn $k;
__END__
e at - line 6.
ARRAY(0x225f04) -> [ 4 ] at - line 7.
e at - line 8.