Yes, it's a reference to an array. For instance: 
$hash{$1}->[0] = $2;
$ref = $hash{$1};
print @$ref[0];

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$ref points to the array. @$ref is the array that $ref points to.

In reply to Re^3: How can I merge data using a hash? by TedPride
in thread How can I merge data using a hash? by Anonymous Monk

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