title: Generate JSON in loop
body: <p>I have quite simple yet complicated question to ask. I'm developing facebook messenger bot and stuck into one issue:</p>
  
  <p>I have JSON file with structure like:</p>
  
  <pre><code>{ 
    itemname1: 'Name1',
    itemaddress1: 'Address1',
    itemtelephone1: 'Telephone1',
    services1: {
      service1name1: 'servicename1',
      service1price1: 'serviceprice2' 
      }
    itemname2: 'Name2',
    itemaddress2: 'Address2',
    itemtelephone2: 'Telephone2',
    services2: {
      service2name1: 'servicename1',
      service2price1: 'serviceprice2' 
      }, {
      service2name1: 'servicename1',
      service2price1: 'serviceprice2' 
      }
  }
  </code></pre>
  
  <p>And I read it from file.json.</p>
  
  <p>Now to message user, I have to generate JSON object in order Facebook to understand it. And the scheme is:</p>
  
  <pre><code>function sendGenericMessage(sender) {
  messageData = {
  "attachment": {
    "type": "template",
    "payload": {
      "template_type": "generic",
      "elements": [{
        "title": "First card",
        "subtitle": "Element #1 of an hscroll",
        "image_url": "http://messengerdemo.parseapp.com/img/rift.png",
        "buttons": [{
          "type": "web_url",
          "url": "https://www.messenger.com/",
          "title": "Web url"
        }, {
          "type": "postback",
          "title": "Postback",
          "payload": "Payload for first element in a generic bubble",
        }],
      },{
        "title": "Second card",
        "subtitle": "Element #2 of an hscroll",
        "image_url": "http://messengerdemo.parseapp.com/img/gearvr.png",
        "buttons": [{
          "type": "postback",
          "title": "Postback",
          "payload": "Payload for second element in a generic bubble",
        }],
      }]
    }
  }
  </code></pre>
  
  <p>};</p>
  
  <p>So what I am to achieve is to read from database and generate cards by the count of elements. For example, I have itemname1 and itemname2 in my JSON, so this should result in:</p>
  
  <pre><code>"elements": [{ 
     "name": "First card"
     blah-blah
     }, {
     "name": "Second card"
     blah-blah
     }]
  </code></pre>
  
  <p>The same goes with buttons. Any ideas how to perform it wisely? Oh yes, I'm using Node.JS with Express and LokiJS for DB implementation. (Though it's more JS algorithm question).</p>
  
  <p>Thank you for your time.</p>