lat11.js

function graduates (students) {
  var Obj={}
for (var i = 0; i < students.length; i++) {
    Obj[students[i].class]=[]
  for (var j = 0; j < students.length; j++){
  if (students[j].class===students[i].class && students[j].score>75) {
    Obj[students[i].class].push({name: students[j].name, score: students[j].score})
  }
  }
}
return Obj
}


console.log(graduates([
  {
    name: 'Dimitri',
    score: 90,
    class: 'foxes'
  },
  {
    name: 'Alexei',
    score: 85,
    class: 'wolves'
  },
  {
    name: 'Sergei',
    score: 74,
    class: 'foxes'
  },
  {
    name: 'Anastasia',
    score: 78,
    class: 'wolves'
  }
]));

// {
//   foxes: [
//     { name: 'Dimitri', score: 90 }
//   ],
//   wolves: [
//     { name: 'Alexei' , score: 85 },
//     { name: 'Anastasia', score: 78 }
//   ]
// }

console.log(graduates([
  {
    name: 'Alexander',
    score: 100,
    class: 'foxes'
  },
  {
    name: 'Alisa',
    score: 76,
    class: 'wolves'
  },
  {
    name: 'Vladimir',
    score: 92,
    class: 'foxes'
  },
  {
    name: 'Albert',
    score: 71,
    class: 'wolves'
  },
  {
    name: 'Viktor',
    score: 80,
    class: 'tigers'
  }
]));

// {
//   foxes: [
//     { name: 'Alexander', score: 100 },
//     { name: 'Vladimir', score: 92 }
//   ],
//   wolves: [
//     { name: 'Alisa', score: 76 },
//   ],
//   tigers: [
//     { name: 'Viktor', score: 80 }
//   ]
// }


console.log(graduates([])); //{}