title: deleting specific json element - mongodb
body: <p>i want to delete one specific point out of my db</p>
  
  <pre><code>// DB layout
  
  {
      id: 9243
      email: asd@asd.asd
      //stuff
      point0:{
          //stuff
          point1:{
              //stuff
              point2:{
                  //stuff (dynamic)
              }
          }
      }
  }
  </code></pre>
  
  <p>now i want to delete point2 out of my db - without! knowing whats inside of it</p>
  
  <pre><code>//actual state of dev:
  
  collection.update({'email': mail}, { $pull: elem }, function(err){
  
  //tested:
  elem = { "point0.point1" : "point2" }
  elem = "point0.point1.point2"
  elem = { "point0.point1.point2" : "" }
  pullAll
  ... etc
  </code></pre>