title: How to check if object exists inside array of object in Angular
body: <p>I am using Angular 8. I want to check in Angular if object exists inside array of objects or not. 
  My object is :</p>
  
  <pre><code>let objVenIns = {
                  'CntNumber': 4,
                  'CntMixer': 2,
                  'DevicePositions': 'NA',
                  'AddComments': 'NA',                
              }
  </code></pre>
  
  <p>Array of object contains other columns as well:-</p>
  
  <pre><code>let arrRowData = [0: {'SrNo' : 1, 'Name' : 'ABC', 'CntNumber': 1,'CntMixer': 3,'DevicePositions': 'Right','AddComments': 'NA'},
      1: {'SrNo' : 2, 'Name' : 'DEF', 'CntNumber': 4,'CntMixer': 2,'DevicePositions': 'NA','AddComments': 'NA'},
      2: {'SrNo' : 3, 'Name' : 'XYZ', 'CntNumber': 2,'CntMixer': 5,'DevicePositions': 'Left','AddComments': 'NA'}]
  </code></pre>
  
  <p>In Angular JS I used to perform following function to check if object exists in array or not:-</p>
  
  <pre><code>var data = $filter('filter')($scope.arrRowData, objVenIns, true)[0];
  </code></pre>
  
  <p>How to achieve such object search in Angular 8?   </p>