Notice also a new attribute introduced in this listing: The keyAttribute attribute, which tells XJConf which element attribute to consider when it sets the keys of the output associative array.

Listing 5 sets the target spreadsheet and worksheet and then creates an array of row data containing column-value mappings.

One way would be to create an array of booleans, one for each line of the original method, and add code that sets the appropriate flag as each line is executed.