Get object keys with the highest value in Javascript

Question

Imagine an object like this:

var values = {
    "2": 1,
    "53": 2,
    "56": 4,
    "57": 9,
    "61": 2,
    "62": 16,
    "63": 2,
    "398": 24,
    ...
}

My goal is, to find the 10 object keys, which have the highest value. In this case: 398, then 62 and so on (= [398, 62, ...]). I know how I can put this into an array, don't know how to receive the property key though.

Important: I can't change the format because it's a server response.

I tried with a for (key in values) {} loop but have no idea how to move on. This similar question and it's answer couldn't really help me either.

Create array of keys and then sort descending based on value and get first 10 — Rajesh, Mar 10 '17 at 11:34

score 7 · Accepted Answer · answered Mar 10 '17 at 11:42

As commented before:

Create an array of keys: Object.keys(object)
Sort this array based on value: sort((a,b)=> object[b] - object[a])
Get necessary values: keys.slice(0,n)

var value = {2:1,53:2,56:4,57:9,61:2,62:16,63:2,398:24};

function getKeysWithHighestValue(o, n){
  var keys = Object.keys(o);
  keys.sort(function(a,b){
    return o[b] - o[a];
  })
  console.log(keys);
  return keys.slice(0,n);
}

console.log(getKeysWithHighestValue(value, 4))

score 3 · Answer 2 · answered Mar 10 '17 at 11:39

You could sort by the values property and slice the result.

var values = { 2: 1, 53: 2, 56: 4, 57: 9, 61: 2, 62: 16, 63: 2, 398: 24 },
    result = Object
        .keys(values)
        .sort(function (a, b) { return values[b] - values[a]; })
        .slice(0, 10)
        .map(Number);

console.log(result);

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score 1 · Answer 3 · answered Mar 10 '17 at 11:36

1

You can use Object.keys to get key values

var value = {
"2": 1,
"53": 2,
"56": 4,
"57": 9,
"61": 2,
"62": 16,
"63": 2,
"398": 24,
}
var parsedKeys = Object.keys(value).map(x => parseInt(x));
var sortedKeys = parsedKeys.sort(function (a, b) {  return b - a;  });

Now you can get highest top 10 keys by sortedKeys.slice(0, 10);

answered Mar 10 '17 at 11:36

Vikramaditya

5,444
6
34
45

What if I have array of words with count ? ex:- `[ { "text":"hello", "size":10},{ "text":"world", "size":2} ,....]` same to 100 object and find top 10 text and store it in an array ? – NoobCoder Jul 23 '20 at 18:40
See the example given [here](https://lodash.com/docs/4.17.15#sortBy) – Vikramaditya Jul 25 '20 at 09:40

score -1 · Answer 4 · answered Mar 10 '17 at 11:37

var value = {
    "2": 1,
    "53": 2,
    "56": 4,
    "57": 9,
    "61": 2,
    "62": 16,
    "63": 2,
    "398": 24
};

var sortable = [];
for (var key in value) {
    sortable.push([key, value[key]]);
}

sortable.sort(function(a, b) {
    return b[1] - a[1];
});

var result = [];
sortable.forEach(function(a) {
  result.push(a[0]);
});

console.log(result.slice(0, 10));

Get object keys with the highest value in Javascript

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