Storing data in ArrayDataProviders (rather than SDP) is useful whenever you want to further modify the data on the client side — for example, if you are looking to create updatable tables in your UI. A common follow up question is, "how can I do additional processing/updates on all the records I'm storing in the ADP?" This is what this post is about.
Since the records are now stored on the client-side, you can access them through JavaScript. You can, for example, write a page level module function to loop over the set of records and modify them. For example, in the video below I'm using this little function to raise the salary of all the employees: