如何將新的計算數組對象添加到現有數組

Question

我有一個數組

data = [
        {location: "Phnom Penh", sale: 1000 },
        {location: "Kandal", sale: 500 },
        {location: "Takeo", sale: 300 },
        {location: "Kompot", sale: 700 },
        {location: "Prey Veng", sale: 100 },
        {location: "Seam Reap", sale: 800 }
      ];

新計算對象：

Total1 = Phnom Penh + Takeo

Total 2 = Prey Veng + Seam Reap

然后我想將這兩個對象添加到現有數組（數據）

data = [
        {location: "Phnom Penh", sale: 1000 },
        {location: "Kandal", sale: 500 },
        {location: "Takeo", sale: 300 },
        {location: "Kompot", sale: 700 },
        {location: "Prey Veng", sale: 100 },
        {location: "Seam Reap", sale: 800 },
        {location: "Total1", sale: 1300 },
        {location: "Total2", sale: 900 }
      ];

有人請幫助我這樣做嗎？ 謝謝

Answer 1

您可以使用定制函數過濾出相關對象，然后計算它們的總銷售額。

此處將數據和位置數組傳遞給getSales 。 過濾掉需要的對象，然后使用reduce來求和它們的銷售額。 然后，您可以使用舊對象中的數據構建新對象，並添加新數據。

 const data = [ {location: "Phnom Penh", sale: 1000 }, {location: "Kandal", sale: 500 }, {location: "Takeo", sale: 300 }, {location: "Kompot", sale: 700 }, {location: "Prey Veng", sale: 100 }, {location: "Seam Reap", sale: 800 } ]; function getSales(data, arr) { return data // Return the current object where the arr // includes the current object location .filter(el => arr.includes(el.location)) // Iterate over those returned objects and sum their sales .reduce((acc, { sale }) => acc += sale, 0); } const out = [ ...data, { location: 'Total1', sale: getSales(data, ['Phnom Penh', 'Takeo']) }, { location: 'Total2', sale: getSales(data, ['Prey Veng', 'Seam Reap']) } ]; console.log(out);

Answer 2

您應該添加來自4位置的銷售額，然后推送數組中的對象。 像這樣的事情應該有效。

data.push({location: "Total1", sale: data["Phnom Penh"].sale + data["Takeo"].sale})
data.push({location: "Total2", sale: data["Prey Veng"].sale + data["Seam Reap"].sale})

另請注意， sale可能不是整數， +可能不會將它們相加，因此您應該使用parseInt 。