Environment Variables in Json file
<p>Can system environment variables be used inside <code>json</code> file?</p>

<p>My <code>json</code> file looks as follows</p>

<pre><code>{
      "db_host":"localhost",
      "db_user":"root",
      "db_pwd" :"password"
}
</code></pre>

<p>Currently I set all these values as environment variables.</p>

<p>Can I directly read the enironment variables inside json file, rather than directly hard-coding?</p>