title: Check if there are null values in an array of objects
body: <p>I have this array of objects.</p>
  
  <pre><code>[Object, Object, Object]
  0:Object
   name: "Rick"
   Contact: "Yes"
   Date:'null'
   Location:'null'
  1:Object
   name:"Anjie"
   Contact:"No"
   Date:'13/6/2016'
   Location:'LA'
  2:Object
   name:"dillan"
   Contact:"Maybe"
   Date:'17/6/2016'
   Location:'NY'
  </code></pre>
  
  <p>As you can see, there are null values for Object[0] for Date and Location. I want to check if there is a null value present in the entire array of Objects.
  If there is a null value present for 'Date' and 'Location', i should be able to display 'Null present' at the console. If no null values are present, it should display 'Data right' at the console. </p>
  
  <p>can someone please let me know how to achieve this. </p>