I'm in the evaluation stage of working with the Spreadsheet. I need the ability to load a file and then read each row and send the data to an web api. The data that is returned will need to update the row. Sometimes there may be a 1000 or more rows. When I get back the api data can I update the individual cells or do I need to build a array and when I'm done load it? I would like for the end user to see the updates as they happen and have it scroll down as the rows are being updated .