javascript - jQuery 添加数组值

Question

下面给出了一个 json

0 : {car_rental_id: "6007", sharing_schedule: "9:00 AM", booked_cars: '1', woo_order_id: "6421", woo_status: "on-hold" }
1 : {car_rental_id: "6007", sharing_schedule: "9:00 AM", booked_cars: '3', woo_order_id: "6424", woo_status: "pending" }
2 : {car_rental_id: "6007", sharing_schedule: "10:00 AM", booked_cars: '5', woo_order_id: "6427", woo_status: "pending"}

这里的目标是获取一次booked_cars的总数。所以根据这个json。我应该得到

上午 9:00 有 4 个预订，上午 10:00 有 5 个预订。

我如何实现这一目标？

Answer 1

var test = [{
  car_rental_id: "6007",
  sharing_schedule: "9:00 AM",
  woo_order_id: "6421",
  woo_status: "on-hold",
  booked_cars: '1'
}, {
  car_rental_id: "6007",
  sharing_schedule: "9:00 AM",
  woo_order_id: "6424",
  woo_status: "pending",
  booked_cars: '3'
}, {
  car_rental_id: "6007",
  sharing_schedule: "10:00 AM",
  woo_order_id: "6427",
  woo_status: "pending",
  booked_cars: '5'
}];

var carsBookedByTime = test.reduce(function(collection, element){
  var bookedCars = parseInt(element.booked_cars);
  //initialize total in the collection if it does not exist
  if (!collection[element.sharing_schedule]) collection[element.sharing_schedule] = 0;
  
  collection[element.sharing_schedule] += bookedCars;

return collection;
}, {});

console.log(carsBookedByTime);