如何在javascript中对这个对象数组进行分组或合并? [英] How to group or merge this array of objects in javascript?
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问题描述
我有一个像下面这样的对象数组。
I have an array of objects like below for example.
{name: "Mc Donald", quantity: 4, maleCount: 1, femaleCount: 0}
{name: "KFC", quantity: 9, maleCount: 1, femaleCount: 0}
{name: "KFC", quantity: 9, maleCount: 1, femaleCount: 0}
{name: "Mc Donald", quantity: 4, maleCount: 0, femaleCount: 1}
{name: "KFC", quantity: 9, maleCount: 0, femaleCount: 1}
{name: "KFC", quantity: 9, maleCount: 1, femaleCount: 0}
{name: "KFC", quantity: 9, maleCount: 0, femaleCount: 1}
{name: "KFC", quantity: 9, maleCount: 0, femaleCount: 1}
我想将它们分组并将其中的所有值相加。例如,决赛将是这样的:
I want to group them up and adding up all the values in it. For example, the final would be like this:
{name: "Mc Donald", quantity: 8, maleCount: 1, femaleCount: 1}
{name: "KFC", quantity: 54, maleCount: 3, femaleCount: 3}
我如何在JavaScript中实现这一目标?
How can I achieve this in JavaScript?
我试图在网上找到一些解决方案,但它不是我想要的解决方案。例如,解决方案
I have tried to find some solution online but it is not the one I wanted. For example this solution
推荐答案
你可以使用数组减少:
var arr = [
{name: "Mc Donald", quantity: 4, maleCount: 1, femaleCount: 0},
{name: "KFC", quantity: 9, maleCount: 1, femaleCount: 0},
{name: "KFC", quantity: 9, maleCount: 1, femaleCount: 0},
{name: "Mc Donald", quantity: 4, maleCount: 0, femaleCount: 1},
{name: "KFC", quantity: 9, maleCount: 0, femaleCount: 1},
{name: "KFC", quantity: 9, maleCount: 1, femaleCount: 0},
{name: "KFC", quantity: 9, maleCount: 0, femaleCount: 1},
{name: "KFC", quantity: 9, maleCount: 0, femaleCount: 1}
];
var finalArr = arr.reduce((m, o) => {
var found = m.find(p => p.name === o.name);
if (found) {
found.quantity += o.quantity;
found.maleCount += o.maleCount;
found.femaleCount += o.femaleCount;
} else {
m.push(o);
}
return m;
}, []);
console.log(finalArr);
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