If necessary you could use UNIVERSAL::isa() to check if the blessed ref is an array ref:

isa won't always work:

my $o = bless {}, 'ARRAY';
print "$o isa array" if UNIVERSAL::isa($o, 'ARRAY');

__END__
ARRAY=HASH(0x759c) isa array

[download]

When you want to know your implementation type you want reftype from Scalar::Util.

use Scalar::Util qw(reftype);

my $hash_object = bless {}, 'ARRAY';
my $array_ref = [1,2,3];
my $array_object = bless [], 'Foo';

foreach ($hash_object, $array_ref, $array_object) {
    print "reftype of ", $_, " is ", reftype($_), "\n";
};

__END__
reftype of ARRAY=HASH(0x759c) is HASH
reftype of ARRAY(0x7650) is ARRAY
reftype of Foo=ARRAY(0x74b8) is ARRAY

[download]

In reply to Re^2: Report on Blessing to 'tag' an object by adrianh
in thread Report on Blessing to 'tag' an object by John M. Dlugosz

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