CODEWITHSUNDEEP
javascriptobjectpropertiessum
manju k
manju k

Reputation: 21

Way to get the sum property values of an object

I'd like to get the sum of object properties

Here is my Input

{
    "Obj1": {
        "1": 50,
        "2": 45.5,
        "3": 15,
        "4": 10,
        "5": 20
    },   
    "Obj2": {
        "1": 12.5,
        "2": 0,
        "3": 0,
        "4": 12.5,
        "5": 0
    }
}

Want my output to be

Obj1 = 140.5          
Obj2 = 25

Let me know if there is a way to get the output as mentioned above in javascript

Thanks in advance!!!

Upvotes: 0

Views: 58

Answers (2)

Kelvin Schoofs
Kelvin Schoofs

Reputation: 8718

This should work for your use case:

const data = {
    "Obj1": { "1": 50, "2": 45.5, "3": 15, "4": 10, "5": 20 },
    "Obj2": { "1": 12.5, "2": 0, "3": 0, "4": 12.5, "5": 0 },
};

const sums = {};
for (const key in data) {
    sums[key] = Object.values(data[key]).reduce((tot, v) => tot + v, 0);
}
console.log(sums);
// {
//     "Obj1": 140.5,
//     "Obj2": 25
// }

Mind that with your sequential keys for your sub-objects, it might be better to use arrays.

Upvotes: 1

Kinglish
Kinglish

Reputation: 23664

Here's a method using Object.assign and reduce to create one object with the key/value pairs that correspond with your desired result.

const data = {
  "Obj1": { "1": 50, "2": 45.5, "3": 15, "4": 10, "5": 20 },
  "Obj2": { "1": 12.5, "2": 0, "3": 0, "4": 12.5, "5": 0 },
};
const result = Object.assign({}, ...Object.entries(data).map(e => ({[e[0]]: Object.entries(e[1]).reduce((b,a) => b+a[1],0)})))
console.log(result)

Upvotes: 1

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