js get sum by key
var array = [
{name: "Peter", age: 43},
{name: "John", age: 32},
{name: "Jake", age: 21}
];
array.reduce(function(sum, current) {
return sum + current.age;
}, 0); // 43 + 32 + 21 = 96
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2
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') // 9
Thank you!
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