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my @aoh1 = qw (value1 value2);
my @aoh2 = qw (value3 value4);

@aoh2 = (@aoh1, @aoh2);

@aoh2 = ('value1',
         'value2',
         'value3',
         'value4'
        );

@aoh1 = ({ 'key1' => 'value1', 
           'key2' => 'value2' });
...
           'key4' => 'value4' });

@aoh2 = (@aoh1, @aoh2);

@aoh2 = (
          {
...
            'key3' => 'value3'
          }
        );