对具有相同键的javascript对象值求和

如果日期相同，我会尝试添加喜欢的数量。根据我的代码，我有相同的日期，但不同的时间一天。我想加上那天所有喜欢的东西。这是日期数组对象

var date = [{text: "b", len: 1, Date: "Fri May 01 2020 10:49:01 GMT+0100 (West Africa Standard 
Time)", Source: "Twitter for Android", Likes: 1},
{text: "b", len: 1, Date: "Fri May 01 2020 10:50:03 GMT+0100 (West Africa Standard Time)", Likes: 1},
{text: "b", len: 1, Date: "Fri May 02 2020 10:55:03 GMT+0100 (West Africa Standard Time)",Likes: 4},
 {text: "b", len: 1, Date: "Fri May 02 2020 10:56:03 GMT+0100 (West Africa Standard Time)",Likes: 3},
 {text: "b they will neither comment not like this tweet", len: 47, Date: "Fri May 01 2020 11:35:49 
GMT+0100 (West Africa Standard Time)", Likes: 0}]

我想要

 `[{Date: May 01 2020, Likes:3}, {Date: May 02 2020, Likes:7}]`

---

您可以使用下面的代码生成所需的结果

const makeDateString = dateString => {
  const date = new Date(dateString);
  return date.toLocaleString("default", {
    year: "numeric",
    month: "long",
    day: "numeric"
  });
};

const resultObject = date.reduce((likes, item) => {
  const newDateString = makeDateString(item.Date);
  if (likes[newDateString]) {
    likes[newDateString] = likes[newDateString] + item.Likes;
  } else {
    likes[newDateString] = item.Likes;
  }
  return likes;
}, {});

const result = Object.entries(resultObject).map(item => {
  return {
    Date: item[0],
    Likes: item[1]
  };
});

---

使用moment和lodash，您可以通过以下代码实现这一点：

var moment = require('moment')
var _ = require('lodash')
var dates = [{text: "b", len: 1, Date: "Fri May 01 2020 10:49:01 GMT+0100 (West Africa Standard Time)", Source: "Twitter for Android", Likes: 1}, {text: "b", len: 1, Date: "Fri May 01 2020 10:50:03 GMT+0100 (West Africa Standard Time)", Likes: 1}, {text: "b", len: 1, Date: "Fri May 02 2020 10:55:03 GMT+0100 (West Africa Standard Time)",Likes: 4}, {text: "b", len: 1, Date: "Fri May 02 2020 10:56:03 GMT+0100 (West Africa Standard Time)",Likes: 3}, {text: "b they will neither comment not like this tweet", len: 47, Date: "Fri May 01 2020 11:35:49 GMT+0100 (West Africa Standard Time)", Likes: 0}];

var datesFormatted = dates.map(d => ({ date: moment(new Date(d.Date)).format("MMM DD YYYY"), likes: d.Likes }));
const result = _(datesFormatted)
  .groupBy('date')
  .map((dateValue, date) => ({
    date: date,
    likes: _.sumBy(dateValue, "likes")
  }))
  .value()
console.log(result)

结果如下：

[ { date: 'May 01 2020', likes: 2 },
  { date: 'May 02 2020', likes: 7 } ]

---

检查此链接是否有用：如果已将其签出，则解决方案是将同一日期分组。我正在尝试在我的date对象中添加所有喜欢的对象，如果它们具有相同的日期，您将必须实现类似的功能，按日期分组（丢弃时间值），然后对每个组的

喜欢数进行求和，这是您的结果。请告诉我，我的JS知识不是很强，谢谢。谢谢您的帮助，我已经实现了它，它很有效。太好了，谢谢！！