Coldfusion: Perks of iterating through structures and arrays using .each()

using-each-instead.cfc

   json = getPayload();
   courses = deserializeJson(json); //this returns an array of structs
   maxCourseId = getMaxId();

   courses.each(function(course, index)) {
       importClass(course, maxCourseId + index);
   }

   function importClass(required struct course, required numeric index) {
       queryObject = new query();
       arguments.course.each(function(key, value) {
           queryObject.addParam(name=key, value=value);
       });
      
       //build and execute insert/update query. Here is where we use arguments.index
   }