/*
When you have a data set that needs to be filtered
by some criteria and you want to manipulate
each remaining item as well
------------------------------
the results of all the students that wrote a particular paper, 
but you are only interested in the full names of all the students
that had a mark of more than 80.
*/

const studentsData = [
  {
    firstName: "Albert",
    lastName: "Einstein",
    score: 53
  },
  {
    firstName: "Charles",
    lastName: "Dickens"
    score: 84
  },
  {
    firstName: "Marilyn",
    lastName: "vos Savant",
    score: 99
  },
];

const smartestStudents = studentsData.reduce(
  (result, student) => {
    // do your filtering
    if (student.score <= 80) {
      return result;
    }

    // do your mapping
    return result.concat(`${student.firstName} ${student.lastName}`);
  },
  []
);