sort an object in an array which has string key

Question

I have this array of objects, I need to sort the 'list' by 'score' in descending order by score.

var list =[{ '440684023463804938': { score: 6, bonuscount: 2 },
  '533932209300832266': { score: 20, bonuscount: 0 },
  '448746017987231756': { score: 9, bonuscount: 0 },
  '492585498561216513': { score: 14, bonuscount: 0 } }]

I usually do with .sort function, but this time it gives me list.sort is not a function

Any help is appreciated.

if that's really how `list` is declared, it would definitely have a `.sort()` method. It doesn't much matter because there's only one item in the array, so it's already sorted. — Pointy, Jan 25 '19 at 16:40
If you're trying to do `list[0].sort(...)` well that won't work; there's no `.sort()` method on objects because you can't impose your own ordering on object property names. — Pointy, Jan 25 '19 at 16:42
Possible duplicate of [Sorting JavaScript Object by property value](https://stackoverflow.com/questions/1069666/sorting-javascript-object-by-property-value) — inorganik, Jan 25 '19 at 19:38

score 2 · Answer 1 · answered Jan 25 '19 at 16:46

You can convert the object to an array and then apply a regular sorting:

const list = [
    {
        '440684023463804938': {score: 6, bonuscount: 2},
        '533932209300832266': {score: 20, bonuscount: 0},
        '448746017987231756': {score: 9, bonuscount: 0},
        '492585498561216513': {score: 14, bonuscount: 0}
    }
];

const result = Object.entries(list[0]).sort((a, b) => b[1].score - a[1].score);

console.log(result);

score 1 · Answer 2 · answered Jan 25 '19 at 17:00

If you want to preserve you JSON architecture, starting with your input:

const input = [{ '440684023463804938': { score: 6, bonuscount: 2 },
  '533932209300832266': { score: 20, bonuscount: 0 },
  '448746017987231756': { score: 9, bonuscount: 0 },
  '492585498561216513': { score: 14, bonuscount: 0 } }];
  

const output = Object.keys(input[0]).sort((a,b) => b-a)
      .reduce( (acc , curr) => { 
                acc[curr] = input[0][curr];
                return acc; 
                },
                {});

console.log([output]);

sort an object in an array which has string key

2 Answers2