如何按公共属性对对象数组进行分组并将其他属性放在一起

如何解决如何按公共属性对对象数组进行分组并将其他属性放在一起

我有一个这样的对象数组

const statuses = [
  {time: '21/1/1990','Status.sold': 8848},{time: '21/1/1990','Status.reserved': 8804},{time: '21/1/1991','Status.reserved': 8756},'Status.sold': 8732},{time: '21/1/1992','Status.killed': 8691},'Status.sold': 8620},{time: '21/1/1993','Status.held': 8511},'Status.killed': 8511},{time: '21/1/1994','Status.sold': 8498},];

而我想要实现的是将所有 Status. 属性放在一起并按 time 属性分组，这对所有对象都是通用的。所以最后的结果会是这样

const statuses = [
  {time: '21/1/1990',sold: 8848,killed: 0,reserved: 8804,held: 0},sold: 8732,reserved: 8756,sold: 8620,killed: 8691,reserved: 0,sold: 0,killed: 8511,held: 8511},sold: 8498,];

我试过这样的事情

const result = statuses.map((obj) => {
   return { ...obj,sold: obj['Status.sold'] ? obj['Status.sold'] : 0,reserved: obj['Status.reserved'] ? obj['Status.reserved'] : 0,killed: obj['Status.killed'] ? obj['Status.killed'] : 0,held: obj['Status.held'] ? obj['Status.held'] : 0
   };
});

但我不确定如何按 time 将它们分组。如何将 reduce 方法与此代码结合使用？提前致谢！

解决方法

您可以将对象按 time 分组。

const
    statuses = [{ time: '21/1/1990','Status.sold': 8848 },{ time: '21/1/1990','Status.reserved': 8804 },{ time: '21/1/1991','Status.reserved': 8756 },'Status.sold': 8732 },{ time: '21/1/1992','Status.killed': 8691 },'Status.sold': 8620 },{ time: '21/1/1993','Status.held': 8511 },'Status.killed': 8511 },{ time: '21/1/1994','Status.sold': 8498 }],result = Object.values(statuses.reduce((r,{ time,...o }) => {
        r[time] ??= { time,sold: 0,killed: 0,reserved: 0,held: 0 };
        Object.entries(o).forEach(([k,v]) => r[time][k.slice(7)] += v);
        return r;
    },{}));

console.log(result);

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,

试试这个：

const statuses = [
  {time: '21/1/1990','Status.sold': 8848},{time: '21/1/1990','Status.reserved': 8804},{time: '21/1/1991','Status.reserved': 8756},'Status.sold': 8732},{time: '21/1/1992','Status.killed': 8691},'Status.sold': 8620},{time: '21/1/1993','Status.held': 8511},'Status.killed': 8511},{time: '21/1/1994','Status.sold': 8498},];

const result = [];

let obj = {};
for (let i = 0; i < statuses.length; i++) {
  const status = statuses[i];
  if (status.time != obj.time) {
    if (i != 0) result.push(obj); 
    obj = {
      time: status.time,held: 0,}
  }
  if (status['Status.sold']) obj.sold += status['Status.sold'];
  if (status['Status.reserved']) obj.reserved += status['Status.reserved'];
  if (status['Status.killed']) obj.killed += status['Status.killed'];
  if (status['Status.held']) obj.held += status['Status.held'];
}
result.push(obj);
console.log(result);