title: Write in file using Rapidjson
body: <p>How can i write some data into file using rapidjson document :</p>
  
  <p>Here is what i need to write :</p>
  
  <pre><code>"Big Node ": [   
                {    "Big Key": "Key Value 1",    "Child Key": "Key Value 1",    "Values": [     1,     3,     4,     1,     2,     3    ]   },
                {    "Big Key": "Key Value 2",    "Child Key": "Key Value 2",    "Values": [     17,     18,     5,     4,     17]   }
               ]
  </code></pre>