4 {{ items|merge({'bar': 'foo'})|join }}
5 {{ items|merge({'bar': 'foo'})|keys|join }}
6 {{ {'bar': 'foo'}|merge(items)|join }}
7 {{ {'bar': 'foo'}|merge(items)|keys|join }}
8 {{ numerics|merge([4, 5, 6])|join }}
10 return array('items' => array('foo' => 'bar'), 'numerics' => array(1, 2, 3))