title: How to create custom filtering using MatTableDataSource in angular 5?
body: <p>In Angular material official website <a href="https://material.angular.io/components/table/overview" rel="noreferrer">Angular Material Table</a> it is mentioned that filterPredicate: ((data: T, filter: string) => boolean) will filter data based on a specific field. But don't know how to start. Is there any example is present for this.</p>