js get sum by key
var array = [
{item: "Coffee", price: 4},
{item: "Brownie", price: 5},
];
const getSumByKey = (arr, key) => {
return arr.reduce((accumulator, current) => accumulator + Number(current[key]), 0)
}
const total = getSumByKey(array, 'price') // 9javascript sum array of objects by key
arr.reduce((total, obj) => obj.credit + total,0)
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