How to sort objects based on their array sum ? React.js

Question

So I have data.js where I stored my JSON... It looks like this:

[
    {
        name: 'Adam Doe',
        city: 'New York',
        mark: [8,10,10,10]
    },
    {
        name: 'Catlyn Stronk',
        city: 'Las Vegas',
        mark: [2,2,2,2,2,3,3,3,4]
    },
    {
        name: 'Anna Doe',
        
        city: 'Michigan',
        mark: [10,8,8,4,3,2]
    }
]

How can I make an array and put somebody with the highest score on top? So since Adam Doe will have the highest score 9.5 he should be first on the list and so on ... I am working in React.js

(If it's in a JS file I don't think it's JSON)

evolutionxbox
– evolutionxbox

2021-01-04 14:15:11 +00:00
Commented Jan 4, 2021 at 14:15 — evolutionxbox
– evolutionxbox, Commented Jan 4, 2021 at 14:15

Nick · Accepted Answer · 2021-01-04 15:09:58Z

5

You can create an avg function and then sort the array based on that average.

const people = [
    {
        name: 'Adam Doe',
        city: 'New York',
        mark: [8,10,10,10]
    },
    {
        name: 'Catlyn Stronk',
        city: 'Las Vegas',
        mark: [2,2,2,2,2,3,3,3,4]
    },
    {
        name: 'Anna Doe',
        
        city: 'Michigan',
        mark: [10,8,8,4,3,2]
    }
]

const avg = (arr) => arr.reduce((acc, el) => acc + el, 0) / arr.length;

people.sort((a, b) => avg(b.mark) - avg(a.mark));

console.log(people);

edited Jan 4, 2021 at 15:09

answered Jan 4, 2021 at 14:16

Nick

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