Array property indexing and update

Question

I have an array from selectable editable grid . Now i want to update value in the array under a particular property and then save that to the db. For saving to the database I am using writeToDataStoreEntity but i need to update some text and then submit for database save. Here is record from a selected row in the grid. 
 [acctType:(Investment-IRA) Prevailing Rate ,ppiStatus:Open,modifiedDate:4/11/2018 7:59 PM GMT+00:00,modifiedBy:steve.busser,createdDate:4/11/2018 7:59 PM GMT+00:00,createdBy:steve.busser,deadline:4/18/2018 12:00 AM GMT+00:00,ticketNumber:31,ppId:78] 
 I am trying to change ppiStatus to "Void", modifiedBy currentuser so on and so forth for the remaining fields. 
 Thanks

Ashvin Kapur · Answer

It looks like the updatecdt() function would be helpful for your use case. You would set the fieldsAndValues parameters to include all of the fields you'd like to update. For example: {ppiStatus: "Void", modifiedBy: loggedInUser()} etc.

Ashvin Kapur · Answer

Once you have local!rowData as your cdt values, you can simply do the following: 
 
a!forEach(items: local!rowData, expression: updatecdt(cdt: cons!APP_CDT, fieldsAndValues: {ppiStatus: "Void"}))