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@PRC_PRIV_ONLY = ( 'one string', ... foreach my $element ( @PRC_PRIV_ONLY ) { $element .= ' appended data'; }
foreach my $element ( @PRC_PRIV_ONLY ) { $element = [ $element, '2nd element' ]; }
@PRC_PRIV_ONLY = ( [ 'one string', '2nd element' ], [ 'two strings', '2nd element' ], [ 'three strings', '2nd element' ], );