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  1. const getLeaderBoard = (students) => {
  2.   const leaderboard = students.map((st) => ({
  3.     ...st,
  4.     totalGrade: Object.values(st.grades).reduce((sum, grade) => sum + grade),
  5.   }));
  6.  
  7.   return leaderboard
  8.     .filter((st) => st.totalGrade >= 85)
  9.     .sort((a, b) => b.totalGrade - a.totalGrade);
  10. };
  11.  
  12. const students = [
  13.   {
  14.     name: "3bkreem",
  15.     class: "3rd",
  16.     grades: {
  17.       math: 25,
  18.       physics: 25,
  19.       programming: 25,
  20.       english: 25,
  21.     },
  22.   },
  23.  
  24.   {
  25.     name: "Samer",
  26.     class: "3rd",
  27.     grades: {
  28.       math: 10,
  29.       physics: 15,
  30.       programming: 12,
  31.       english: 19,
  32.     },
  33.   },
  34.  
  35.   {
  36.     name: "Ahmed",
  37.     class: "3rd",
  38.     grades: {
  39.       math: 20,
  40.       physics: 20,
  41.       programming: 20,
  42.       english: 20,
  43.     },
  44.   },
  45.  
  46.   {
  47.     name: "Ali",
  48.     class: "3rd",
  49.     grades: {
  50.       math: 20,
  51.       physics: 25,
  52.       programming: 19,
  53.       english: 22,
  54.     },
  55.   },
  56.  
  57.   {
  58.     name: "Elgoker",
  59.     class: "3rd",
  60.     grades: {
  61.       math: 23,
  62.       physics: 25,
  63.       programming: 19,
  64.       english: 22,
  65.     },
  66.   },
  67. ];
  68.  
  69. console.log(getLeaderBoard(students));
  70. console.log("#".repeat(50));
  71. console.log(students);
  72.  
Success #stdin #stdout 0.13s 31316KB
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[ { name: '3bkreem',
    class: '3rd',
    grades: { math: 25, physics: 25, programming: 25, english: 25 },
    totalGrade: 100 },
  { name: 'Elgoker',
    class: '3rd',
    grades: { math: 23, physics: 25, programming: 19, english: 22 },
    totalGrade: 89 },
  { name: 'Ali',
    class: '3rd',
    grades: { math: 20, physics: 25, programming: 19, english: 22 },
    totalGrade: 86 } ]
##################################################
[ { name: '3bkreem',
    class: '3rd',
    grades: { math: 25, physics: 25, programming: 25, english: 25 } },
  { name: 'Samer',
    class: '3rd',
    grades: { math: 10, physics: 15, programming: 12, english: 19 } },
  { name: 'Ahmed',
    class: '3rd',
    grades: { math: 20, physics: 20, programming: 20, english: 20 } },
  { name: 'Ali',
    class: '3rd',
    grades: { math: 20, physics: 25, programming: 19, english: 22 } },
  { name: 'Elgoker',
    class: '3rd',
    grades: { math: 23, physics: 25, programming: 19, english: 22 } } ]
https://ideone.com/qAegOU
language:
Node.js (node 11.12.0)
created:
11 days ago
visibility:
public

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