title: How to represent an array with empty elements in JSON?
body: <p>I have an array in JavaScript that looks like this:</p>
  
  <pre><code>var pattern = [ ["C5", 3], , , , , , , , ["C5", 3], , , ] 
  </code></pre>
  
  <p>I want to store it in a json file like this:</p>
  
  <pre><code>{
    "pattern": [
                 ["C5", 3], , , , , , , , ["C5", 3], , ,
               ]
  }
  </code></pre>
  
  <p>JSONLint tells me this:</p>
  
  <pre><code>Parse error on line 6:
  ...        ],        ,        ,        
  ---------------------^
  Expecting 'STRING', 'NUMBER', 'NULL', 'TRUE', 'FALSE', '{', '['
  </code></pre>
  
  <p>So I understand I can't let the space between commas empty. What's similar to empty, but is accepted by JSON standards?</p>
  
  <p>This pattern file is part of a Javascript Music Tracker I'm making that's similar to impulse tracker, and I want the json file to be as clean as possible.</p>