I want to calculate sum of array data in JavaScript.
Array :
[
{
red_team: {
count: 2,
money: 3000,
},
blue_team: {
count: 10,
money: 100000,
},
},
{
red_team: {
count: 1,
money: 1000,
},
blue_team: {
count: 100,
money: 200000,
},
}
]
Expected Result :
{
red_team: {
count: 3,
money: 4000,
},
blue_team: {
count: 110,
money: 300000,
},
}
Note : red_team & blue_team is an Enum.
how can I calculate it ?
Spread the array into lodash's _.mergeWith(), and create a customizer that sums number, but returns undefined for all other types, so that lodash would handle all other cases:
const data = [{"red_team":{"count":2,"money":3000},"blue_team":{"count":10,"money":100000}},{"red_team":{"count":1,"money":1000},"blue_team":{"count":100,"money":200000}}]
const result = _.mergeWith({}, ...data, (a, b) =>
_.isNumber(a) ? a + b : undefined
)
console.log(result)<script src="https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.21/lodash.min.js" integrity="sha512-WFN04846sdKMIP5LKNphMaWzU7YpMyCU245etK3g/2ARYbPK9Ub18eG+ljU96qKRCWh+quCY7yefSmlkQw1ANQ==" crossorigin="anonymous" referrerpolicy="no-referrer"></script>Per a comment above, an infinite ways of doing this. I just came up with one (rather verbose admittedly)
const arr = [
{
red_team: {
count: 2,
money: 3000,
},
blue_team: {
count: 10,
money: 100000,
},
},
{
red_team: {
count: 1,
money: 1000,
},
blue_team: {
count: 100,
money: 200000,
},
}
];
function sumByKeyAndProperty(arr, key, property){
let sum = 0
arr.forEach((obj) => {
sum+=obj[key][property]
})
return sum
}
returnObj = {
red_team: {
count: sumByKeyAndProperty(arr, 'red_team', 'count'),
money: sumByKeyAndProperty(arr, 'red_team', 'money'),
},
blue_team: {
count: sumByKeyAndProperty(arr, 'blue_team', 'count'),
money: sumByKeyAndProperty(arr, 'blue_team', 'money'),
}
}
console.log(returnObj)