title: Merging two dictionaries with different index
body: <p>I want to merge this dictionary:</p>
  
  <pre><code>b = {data:[{station_id: 7000,
   name: "Ft. York / Capreol Crt."
   },
   {station_id: 7001,
    name: "Lower Jarvis St / The Esplanade"}
   ]}
  </code></pre>
  
  <p>and this one:</p>
  
  <pre><code>c = {data:[{station_id: 7000,
   num_bikes_available: 18,
   },
   {station_id: 7001,
    num_bikes_available: 4,
    },
   {station_id: 7002,
    num_bikes_available: 10}      
  ]}
  </code></pre>
  
  <p>and get one dictionary like this:</p>
  
  <pre><code>d = {data:[{station_id: 7000,
       name: "Ft. York / Capreol Crt.",
       num_bikes_available: 18
        },
      {station_id: 7001,
       name: "Lower Jarvis St / The Esplanade",                         
       num_bikes_available: 4},
      {station_id: 7002,
       num_bikes_available: 10} 
      ]}
  </code></pre>
  
  <p>How can I do that? have in mind that in c we have a station_id = 7002 which in b we don't.</p>