js 计算对象数组中某个属性合计
js 计算对象数组中某个属性合计
countTotal调用示例:
let arr = [
{id: 0, price: 199.88},
{id: 1, price: 299.88},
{id: 2, price: 399.88}
];
console.log(countTotal(arr, 'price')); //899.64
//计算对象数组中某个属性合计
function countTotal(arr, keyName) {
let $total = 0;
$total = arr.reduce(function (total, currentValue, currentIndex, arr){
return currentValue[keyName] ? (total + currentValue[keyName]) : total;
}, 0);
return $total;
}