title: Add nested json object item to another json item
body: <p><strong>I want to add two nested objects in JSON in typescript.</strong></p>
  
  <p>In JSON given below I want to add second JSON's activityLogs item in first JSON's activityLogs.</p>
  
  <p><strong>JSON1:</strong> </p>
  
  <pre><code>[{"vehicleno":"SV028","devicE_CODE":"8505","activityLogs":
      [{"gpsdate":"01/03/2019","gpstime":"13:40:18"},
       {"gpsdate":"01/03/2019","gpstime":"13:38:18"},
       {"gpsdate":"01/03/2019","gpstime":"13:37:18"}]
  }]
  </code></pre>
  
  <p><strong>JSON2:</strong> </p>
  
  <pre><code>[{"vehicleno":"SV028","devicE_CODE":"8505","activityLogs":
      [{"gpsdate":"01/03/2019","gpstime":"13:46:18"},
      {"gpsdate":"01/03/2019","gpstime":"13:43:18"}]
  }]
  </code></pre>
  
  <p><strong>Result:</strong></p>
  
  <pre><code>[{"vehicleno":"SV028","devicE_CODE":"8505","activityLogs":
      [{"gpsdate":"01/03/2019","gpstime":"13:46:18"},
      {"gpsdate":"01/03/2019","gpstime":"13:43:18"},
       {"gpsdate":"01/03/2019","gpstime":"13:40:18"},
      {"gpsdate":"01/03/2019","gpstime":"13:38:18"},
      {"gpsdate":"01/03/2019","gpstime":"13:37:18"}]
  }]
  </code></pre>
  
  <p>How I can do this?</p>