Normal:
$array = [
           {
             'A' => 'B',
             'C' => 'D',
             'E' => 'F'
           },
           'foo',
           $array->[0]
         ];

Deepcopy:
$array = [
           {
             'A' => 'B',
             'C' => 'D',
             'E' => 'F'
           },
           'foo',
           {
             'A' => 'B',
             'C' => 'D',
             'E' => 'F'
           }
         ];

Purity:
$array = [
           {
             'A' => 'B',
             'C' => 'D',
             'E' => 'F'
           },
           'foo',
           {}
         ];
$array->[2] = $array->[0];

Terse:
[
  {
    'A' => 'B',
    'C' => 'D',
    'E' => 'F'
  },
  'foo',
  $array->[0]
]