title: How to export JSON data that has dynamic key value pairs with no specific properties into an excel file using Angular 7 and PrimeNg?
body: <p>I have a table that contains a collection of files.
  My use case is that when a user clicks on a row in that table, an event will be fired that will make a call to the service and get the JSON data. the JSON data is going to change whenever user clicks on a different row in a table. So I am not going to have specific properties or let's say keys (in key value pair). I am just gonna get JSON data in the form of a 2D string array. 
  Now my task is to grab this data and export it into excel document. </p>