分组，求和，并为每个数组生成一个对象javascript [英] group by, and sum, and generate a object for each array javascript

问题描述

我需要这方面的帮助，我需要按 id 和 sum 分组，但我需要为每个结果创建一个新对象

让数据=[{"id":"2018", "name":"test", "total":1200},{"id":"2019", "name":"wath", "total":1500},{"id":"2019", "name":"wath", "total":1800},{"id":"2020", "name":"zooi", "total":1000},]

我有这段代码只返回一个带有结果的对象

let result = data.reduce(function (r, o) {(r[o.id])?r[o.id] += o.total:r[o.id] = o.total;返回 r;});

但我需要这样的

<预><代码>[{"id":"2018", "name":"test", "total":1200},{"id":"2019", "name":"wath", "total":2300},{"id":"2020", "name":"zooi", "total":1000},]

有什么建议吗，谢谢

解决方案

你可以试试这个:

const 结果 = Object.values(data.reduce((r, o) => (r[o.id]?(r[o.id].total += o.total): (r[o.id] = {...o}), r), {}));

i need help with this, i need group by id and sum, but i need a new object for each result

let data =[
    {"id":"2018", "name":"test", "total":1200},
    {"id":"2019", "name":"wath", "total":1500},
    {"id":"2019", "name":"wath", "total":1800},
    {"id":"2020", "name":"zooi", "total":1000},
]

i have this code that return just one object with the result

let result = data.reduce(function (r, o) {
    (r[o.id])?
        r[o.id] += o.total:
        r[o.id] = o.total; 
    return r;
});

but i need some like this

[
    {"id":"2018", "name":"test", "total":1200},
    {"id":"2019", "name":"wath", "total":2300},
    {"id":"2020", "name":"zooi", "total":1000},
]

any suggestion?, thanks

解决方案

You can try this:

const result = Object.values(data.reduce((r, o) => (r[o.id]
  ? (r[o.id].total += o.total)
  : (r[o.id] = {...o}), r), {}));

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