Sort an array of objects by multiple properties in JavaScript

JavascriptWeb DevelopmentFront End TechnologyObject Oriented Programming

Suppose, we have an array of objects like this −

const arr = [
   { id: 1, score: 1, isCut: false, dnf: false },
   { id: 2, score: 2, isCut: false, dnf: false },
   { id: 3, score: 3, isCut: false, dnf: false },
   { id: 4, score: 4, isCut: false, dnf: false },
   { id: 5, score: 5, isCut: true, dnf: true },
   { id: 6, score: 6, isCut: true, dnf: false },
   { id: 7, score: 7, isCut: true, dnf: false },
   { id: 8, score: 8, isCut: true, dnf: false },
   { id: 9, score: 9, isCut: true, dnf: false },
   { id: 10, score: 0, isCut: false, dnf: false },
   { id: 11, score: -1, isCut: false, dnf: false },
   { id: 12, score: -2, isCut: false, dnf: true },
   { 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 }
];

We are required to sort the above array on the following criteria −

If dnf is true,

object goes to bottom; all dnf-objects should be sorted by score

If issue is true,

object goes to bottom, but above dnfs; all isCut-objects should be sorted by score

Rest should be sorted by score, and if the scores are equal, by id

Example

The code for this will be −

const arr = [
   { id: 1, score: 1, isCut: false, dnf: false },
   { id: 2, score: 2, isCut: false, dnf: false },
   { id: 3, score: 3, isCut: false, dnf: false },
   { id: 4, score: 4, isCut: false, dnf: false },
   { id: 5, score: 5, isCut: true, dnf: true },
   { id: 6, score: 6, isCut: true, dnf: false },
   { id: 7, score: 7, isCut: true, dnf: false },
   { id: 8, score: 8, isCut: true, dnf: false },
   { id: 9, score: 9, isCut: true, dnf: false },
   { id: 10, score: 0, isCut: false, dnf: false },
   { id: 11, score: -1, isCut: false, dnf: false },
   { id: 12, score: -2, isCut: false, dnf: true },
   { 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 }
];
const sortComplex = (arr = []) => {
   arr.sort(function (a, b) {
      const order = (dnf, isCut) => {
         return [0, 1, 3, 2][dnf * 2 + isCut];
      }
      return order(a.dnf, a.isCut) - order(b.dnf, b.isCut) || b.score - a.score;
   });
};
sortComplex(arr);
console.log(arr);

Output

And the output in the console will be −

[
   { id: 4, score: 4, isCut: false, dnf: false },
   { 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 },
   { 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 },
   { id: 12, score: -2, isCut: false, dnf: true }
]
raja
Published on 24-Nov-2020 09:49:07
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