title: Convert JSON to headed TSV
body: <p>Given a JSON file like this,</p>
  
  <pre><code>[
    {
      "h1": "x1",
      "h2": "x2"
    },
    {
      "h1": "y1",
      "h2": "y2"
    }
  ]
  </code></pre>
  
  <p>I extract it as a headed TSV using the following jq code. But I need to specify the header names twice. Is there a way to just specify the header names once? Thanks.</p>
  
  <pre><code>[
      "h1"
      , "h2"
  ], (.[] | [ 
      .h1
      , .h2
  ]) | @tsv
  </code></pre>