Найти учеников с максимальной и минимальной средней оценкой?

Question

[ChampionII]

Ниже функция которая выводит список учеников и среднюю оценку каждого учеика.
Вопрос: Как вывести учеников с максимальной и минимальной средней оценкой?
let students = [
{ name: "One", marks: [8, 10, 7, 5, 4] },
{ name: "Two", marks: [5, 2, 8, 5, 3] },
{ name: "Three", marks: [6, 9, 3, 6, 7] },
{ name: "Fore", marks: [1, 7, 8, 4, 10] },
{ name: "Five", marks: [5, 8, 6, 9, 3] },
]
function getNoteMinMax() {
let averageNote;
for (let key in students) {
for (let mark in students[key].marks) {
averageNote = students[key].marks.reduce((a, b) => a + b, 0) / students[key].marks.length;
}
console.log("Student: " + students[key].name + "; Average note: " + averageNote);
}
}
getNoteMinMax(students)

Answer 1

[Сергей Соловьев]

function getNoteMinMax() {
    let min = null, max = null;
    for (const item of students.map(s => ({
        student: s,
        average: (s.marks.reduce((a, b) => a + b, 0) / s.marks.length)
    })) {
        if (min === null || item.average < min.average) {
            min = item;
        }
        if (max === null || item.average > max.average) {
            max = item;
        }
    } 
    return {
        min: min.student,
        max: max.student
    }
}

Answer 2

[WAR_VIK]

Можно так:

let print = s => console.log(s);
let stud = [
{ name: "One", marks: [8, 10, 7, 5, 4] },
{ name: "Two", marks: [5, 2, 8, 5, 3] },
{ name: "Three", marks: [6, 9, 3, 6, 7] },
{ name: "Fore", marks: [1, 7, 8, 4, 10] },
{ name: "Five", marks: [5, 8, 6, 9, 3] },
];
let st_min = {...stud[0]}, st_max = {...stud[0]};
let av_min = av_max = st_min.marks.reduce((a, c) => a + c, 0) / st_min.marks.length;
for(let ob of stud) {
    let av = ob.marks.reduce((a, c) => a + c, 0) / ob.marks.length;
    if(av_min > av) {
        st_min = {...ob}; av_min = av;
    }
    if(av_max < av) {
        st_max = {...ob}; av_max = av;
    }
}
print(st_min);
print(st_max);

Answer 3

[Сергей Соколов]

const students = [
  { name: 'One', marks: [8, 10, 7, 5, 4] },
  { name: 'Two', marks: [5, 2, 8, 5, 3] },
  { name: 'Three', marks: [6, 9, 3, 6, 7] },
  { name: 'Fore', marks: [1, 7, 8, 4, 10] },
  { name: 'Five', marks: [5, 8, 6, 9, 3] },
];

const min = { student: null, avg: Number.POSITIVE_INFINITY };
const max = { student: null, avg: Number.NEGATIVE_INFINITY };

students.forEach(student => {
  const { marks } = student;
  const avg = marks.reduce((acc, c) => acc + c) / marks.length;
  if (avg > max.avg) {
    max.avg = avg;
    max.student = student;
  } else if (avg < min.avg) {
    min.avg = avg;
    min.student = student;
  }
});

console.log('Student with mininal average mark', min.student);
console.log('Student with best average mark', max.student);