Finding highest count by sum up of an attribute in an Json array in javascript

Question

I'm looking for clean and efficient way to get highest value count by sum up of all attributes in following json array.

[{ "id":1, "material":2, "noMaterial":3, "negative":1 }, { "id":2, "material":4, "noMaterial":3, "negative":3}, { "id":3, "material":0, "noMaterial":1, "negative":1}]

Expected Output:

{ "noMaterial": 7 }

You can use map() method like yourArray.map(v=>{ ... }). — Raeesh Alam
– Raeesh Alam, Commented Feb 16, 2022 at 9:11

Raeesh Alam · Accepted Answer · 2022-02-16 09:49:39Z

1

This is not perfect way but may be it can be help to you.

var data = [{ 
    "id": 1, 
    "material": 2, 
    "noMaterial": 3, 
    "negative": 1
}, { 
    "id": 2, 
    "material": 4, 
    "noMaterial": 3, 
    "negative": 3
}, {
    "id": 3, 
    "material": 0, 
    "noMaterial": 1, 
    "negative": 1
}];


let keyName = ['material', 'noMaterial', 'negative'];
let [material, noMaterial, negative] = [0, 0, 0];

data.map((v,i)=>{
    material += v.material;
    noMaterial += v.noMaterial;
    negative += v.negative;
});

const max = Math.max(material, noMaterial, negative);
const index = [material, noMaterial, negative].indexOf(max);

console.log(keyName[index]+':'+max)

answered Feb 16, 2022 at 9:49

Raeesh Alam

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1 Comment

Raeesh Alam Over a year ago

I rewrite this code with more reliable so there is not need to write manually key name. check here...

Ibrahim Banat · Accepted Answer · 2022-02-16 08:31:48Z

0

I defined a reusable hook that you can use on other attributes of your array as follows:

function getSum(keyName, data) {
  return {[keyName]: 
    data.reduce((acc, current) => {
      return acc + current[keyName]; 
    }, 0)
  };
}

and then call apply it on your data as follows:

getSum("noMaterial", data);

here is link for the code

answered Feb 16, 2022 at 8:31

Ibrahim Banat

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2 Comments

Ibrahim Banat Over a year ago

sorry, I miss reading your question that you want the highest value.

Priyanka Over a year ago

output should be the key and value of highest count.

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