I have a data that type is object and I want to sum the value1 + value 2 as totalValue per each name by using for
//this is my object
{
111:{name:'a', value1: 2 , value2: 2},
222:{name:'b', value1: 3 , value2: 3},
333:{name:'c', value1: 4 , value2: 4},
}
// this is the result that I expected
{
{name:'a' , totalValue:4},
{name:'b' , totalValue:6},
{name:'c' , totalValue:8},
}
Transform the object into an array of key value pairs using Object.entries
Then map over the entries and calculate the totalValue property.
Finally transform the array back to an object using Object.fromEntries.
const obj = {
111: { name: "a", value1: 2, value2: 2 },
222: { name: "b", value1: 3, value2: 3 },
333: { name: "c", value1: 4, value2: 4 },
};
const result = Object.fromEntries(
Object.entries(obj).map(([k, v]) => [k, { name: v.name, totalValue: v.value1 + v.value2 }])
);
console.log(result);If there are multiple value properties that you wish to add, then refer to the solution below:
const obj = {
111: { name: "a", value1: 2, value2: 2 },
222: { name: "b", value1: 3, value2: 3 },
333: { name: "c", value1: 4, value2: 4 },
};
const result = Object.fromEntries(
Object.entries(obj).map(([k, v]) => [
k,
{
name: v.name,
totalValue: Object.keys(v)
.filter((k) => k.includes("value"))
.reduce((s, k) => s + v[k], 0),
},
])
);
console.log(result);You can do something like this
const obj = {
111: {
name: 'a',
value1: 2,
value2: 2,
value3: 4
},
222: {
name: 'b',
value1: 3,
value2: 3
},
333: {
name: 'c',
value1: 4,
value2: 4
},
};
const result = [];
for (const key in obj) {
const item = obj[key];
let total = 0;
const final = {};
Object.keys(item).forEach(key => {
if (key.startsWith('value')) {
total += item[key];
} else {
final[key] = item[key];
}
})
final.totalValue = total;
result.push(final);
}
console.log(result);Your expected result is not a valid object.
Here is some possible codes.
const obj = {
111:{name:'a', value1: 2 , value2: 2},
222:{name:'b', value1: 3 , value2: 3},
333:{name:'c', value1: 4 , value2: 4},
};
const arrResult = Object.values(obj)
.map(({ name, value1, value2 }) => ({ name, totalValue: value1 + value2 }));
const objResult = Object.entries(obj)
.map(([key, { name, value1, value2 }]) => ({ key, value: { name, totalValue: value1 + value2 } }))
.reduce((acc, cur) => { acc[cur.key] = cur.value; return acc; }, {});