我有一个对象数组,数组中有另一个对象数组,我想求和值。所以和是基于相同的picker_id。然后将current_capacity, process_time_in_minutes和picked_qty放在产品中,这是一个对象数组。以下是我的数据:
var arr = [
{
current_capacity: 6000,
picker_id: "icQrHPuE2fMZslceSG6liwuRar92",
process_time_in_minutes: 10,
products: [
{
product_id: 1,
picked_qty: 2
},
{
product_id: 2,
picked_qty: 3
}
]
},
{
current_capacity: 2500,
picker_id: "icQrHPuE2fMZslceSG6liwuRar92",
process_time_in_minutes: 20,
products: [
{
product_id: 1,
picked_qty: 10
}
]
},
{
current_capacity: 36000,
picker_id: "WIRzfIZALeftRk3DRGvh4nBdxQV2",
process_time_in_minutes: 15,
products: [
{
product_id: 1,
picked_qty: 2
},
{
product_id: 2,
picked_qty: 3
}
]
}
];
下面是我的代码:
var res = arr.reduce((acc, obj) => {
var existObj = acc.find((item) => item.picker_id === obj.picker_id);
if (existObj) {
let total_picked = obj.products.reduce((acc2, curr) => acc2 + curr);
// console.log("total_picked", total_picked);
existObj.current_capacity =
existObj.current_capacity + obj.current_capacity;
existObj.process_time_in_minutes =
existObj.process_time_in_minutes + obj.process_time_in_minutes;
existObj.total = existObj.total ? existObj.total : 0 + total_picked;
return acc;
}
acc.push(obj);
return acc;
}, []);
const formatted = res.map((el) => {
return {
picker_id: el.picker_id,
total_volume: el.current_capacity,
total_time: el.process_time_in_minutes,
total_products: el.total
};
});
结果如下:
[
{
picker_id: "icQrHPuE2fMZslceSG6liwuRar92"
total_volume: 8500
total_time: 30
total_products: "0[object Object]"
},
{
picker_id: "WIRzfIZALeftRk3DRGvh4nBdxQV2"
total_volume: 36000
total_time: 15
total_products: undefined
}
]
预期如下:
[
{
picker_id: "icQrHPuE2fMZslceSG6liwuRar92"
total_volume: 8500
total_time: 30
total_products: 15
},
{
picker_id: "WIRzfIZALeftRk3DRGvh4nBdxQV2"
total_volume: 36000
total_time: 15
total_products: 5
}
]
使用一点参数解构,我认为您可以在解决其他人描述的问题后做一点进一步的清理。我的版本可能像这样:
const extract = (xs) => Object .values (xs .reduce (
(acc, {current_capacity, picker_id, process_time_in_minutes, products}) => {
const curr = acc [picker_id] || (acc [picker_id] = {
picker_id, total_volume: 0, total_time: 0, total_products: 0
})
curr .total_volume += current_capacity
curr .total_time += process_time_in_minutes
curr .total_products += products .reduce ((t, p) => t + p .picked_qty, 0)
return acc
},
{}
))
const arr = [{current_capacity: 6e3, picker_id: "icQrHPuE2fMZslceSG6liwuRar92", process_time_in_minutes: 10, products: [{product_id: 1, picked_qty: 2}, {product_id: 2, picked_qty: 3}]}, {current_capacity: 2500, picker_id: "icQrHPuE2fMZslceSG6liwuRar92", process_time_in_minutes: 20, products: [{product_id: 1, picked_qty: 10}]}, {current_capacity: 36e3, picker_id: "WIRzfIZALeftRk3DRGvh4nBdxQV2", process_time_in_minutes: 15, products: [{product_id: 1, picked_qty: 2}, {product_id: 2, picked_qty: 3}]}]
console .log (extract (arr))
.as-console-wrapper {max-height: 100% !important; top: 0}
您还可以通过以下方式实现输出
function getProductQty(arr){
let total = 0;
arr.forEach(prd => {
total += prd.picked_qty
})
return total;
}
const result = arr.reduce((acc,product) => {
if(!acc.hasOwnProperty(product.picker_id)){
acc[product.picker_id] = {
picker_id: product.picker_id,
total_volume: product.current_capacity,
total_time: product.process_time_in_minutes
}
acc[product.picker_id].total_products = getProductQty(product.products);
}else{
acc[product.picker_id].total_volume = acc[product.picker_id].total_volume + product.current_capacity
acc[product.picker_id].total_time = acc[product.picker_id].total_time + product.process_time_in_minutes
acc[product.picker_id].total_products = acc[product.picker_id].total_products + getProductQty(product.products);
}
return acc
},{})
console.log(Object.values(result),'result');
您的实现的问题是,如果existObj
没有退出您的acc
,您直接推动obj
,而不是您需要首先从产品的内部数组处理total
。
我已经更新了你的代码,看起来更干净,更容易维护。
方法:
- 为每个保存计算数据的
picker_id
构建dict
- 将
dict
转换为list
var result = arr.reduce((acc, obj) => {
if (!acc[obj.picker_id]) {
acc[obj.picker_id] = {
total_volume: 0,
total_time: 0,
total_products: 0
};
}
const selectedPicker = acc[obj.picker_id];
const total_picked = obj.products.reduce((acc2, item) => acc2 + item.picked_qty, 0);
selectedPicker.total_volume = selectedPicker.total_volume + obj.current_capacity;
selectedPicker.total_time =
selectedPicker.total_time + obj.process_time_in_minutes;
selectedPicker.total_products = selectedPicker.total_products + total_picked;
return acc;
}, {});
const formatted = Object.keys(result).reduce((acc, picker_id) => {
acc.push({
picker_id,
...result[picker_id]
})
return acc;
}, [])
console.log("formmated", formatted);