作者:Yomon-00 | 来源:互联网 | 2023-09-25 05:02
我有一个看起来像这样的对象数组:
const users = [{name: 'John', gender: 'Male', orders: 20},
{name: 'Doe', gender: 'Male', orders: 8},
{name: 'Ada', gender: 'Female', orders: 10},
{name: 'David', gender: 'Male', orders: 30}];
我需要计算重复性别的数量,并根据对象中的性别总结订单数量。我希望最终的数组如下所示:
[{gender: 'Male', count: 3, totalOrders: 58}, {gender: 'Female', count: 1, totalOrders: 10}]
这是我到目前为止的代码:
const usersGender = users.map((user) => user.gender);
const result = Object.values(usersGender.reduce((a, b) => {
a[b] = a[b] || [b, 0];
a[b][1]++;
return a;
},{})).map(item => ({gender: item[0], count : item[1]}));
console.log(result);
我上面代码的输出是:
[{ gender: 'Male', count: 3 }, { gender: 'Female', count: 1 }]
谢谢你。
回答
您可以收集一个对象并从中获取值。
const
users = [{ name: 'John', gender: 'Male', orders: 20 }, { name: 'Doe', gender: 'Male', orders: 8 }, { name: 'Ada', gender: 'Female', orders: 10 }, { name: 'David', gender: 'Male', orders: 30 }],
result = Object.values(users.reduce((r, { gender, orders }) => {
r[gender] ??= { gender, count: 0, totalOrders: 0 };
r[gender].count++;
r[gender].totalOrders += orders;
return r;
}, {}));
console.log(result);
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