How to get the columns from a Microsoft list row into an array of strings

I'm getting one row from a Microsoft list and want to loop though each column in the row, the problem I'm having is putting each into an array so I can user a loop. All i need is the column names , not the row values.

I know in can access the using the dynamic content but I need to pull a row and it can be different lists.

Does anyone know how it can be done?

Thanks.

I have tried using json and compose but I can't get it for work.

You can do this with xpath.

Create a new Select action under Data Operations, and set the following:

From:
xpath(xml(json(concat('{"body":', outputs('Get_item')?['body'], '}'))), 'body/*')
Map:
xpath(item(), 'name(/*)')

This will return a string array of the column names.

Note: in the Select action, click on the Switch map to text mode button (looks like 🅃 ).

Alternatively, you can use the following request to get the column names of a list as an array.

Method: GET
URI: /_api/web/lists/getbytitle('YOUR LIST NAME')/fields?$filter=Hidden eq false and ReadOnlyField eq false