Sort an array of objects by multiple properties

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(Updated) Here’s the answer of question you mentioned in comment.

a.sort(function(a, b) {
  if (a.dnf != b.dnf) {
    return a.dnf ? 1 : -1;
  }
  if (!(a.dnf && b.dnf) && a.isCut != b.isCut) {
    return a.isCut ? 1 : -1;
  }
  if (a.score != b.score) {
    return b.score - a.score; // descending
  }
  return b.id - a.id; // descending
});

Result:

[
  {"id":4,"score":4,"isCut":false,"dnf":false},   // the rest: order by score, id
  {"id":3,"score":3,"isCut":false,"dnf":false},   //
  {"id":2,"score":2,"isCut":false,"dnf":false},   //
  {"id":1,"score":1,"isCut":false,"dnf":false},   //
  {"id":10,"score":0,"isCut":false,"dnf":false},  //
  {"id":11,"score":-1,"isCut":false,"dnf":false}, //
  {"id":13,"score":-3,"isCut":false,"dnf":false}, //
  {"id":14,"score":-4,"isCut":false,"dnf":false}, //
  {"id":15,"score":-5,"isCut":false,"dnf":false}, //
  {"id":16,"score":10,"isCut":true,"dnf":false}, // isCut: order by score, id
  {"id":9,"score":9,"isCut":true,"dnf":false},   //
  {"id":8,"score":8,"isCut":true,"dnf":false},   //
  {"id":7,"score":7,"isCut":true,"dnf":false},   //
  {"id":6,"score":6,"isCut":true,"dnf":false},   //
  {"id":5,"score":5,"isCut":true,"dnf":true},   // dnf: order by score, id
  {"id":12,"score":-2,"isCut":false,"dnf":true} //
]

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