thank you but its still not clear, so @{$row} contains that data structure and @{$sheet2} is pushed $row the reference . i was reading into undefined and reference but still am confused ..refrences are declared like this i saw . could you take out time and give clarity to the undefined $row ,@$row , and what $row being pushed to @$sheet2 means

 my @array = (1, 2, 3, 'four');
    my $reference = \@array;

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In reply to Re^2: what is @$varname in perl by sandy105
in thread what is @$varname in perl by sandy105

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