Javascript 对象数组根据其中某一个相同的对象属性进行重新分类

QJ.M

于 2023-09-21 09:53:01 发布

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分类专栏： js 文章标签： javascript 开发语言 ecmascript

本文链接：https://blog.youkuaiyun.com/weixin_43953503/article/details/133124753

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文章描述了对给定时间戳列表进行处理，统计每个时间点的transCount值，以便于分析和可视化时间序列数据的过程。

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var list = [
  {
    "transCount": 1,
    "time": "2023-09-15 18:05:43"
  },
  {
    "transCount": 1,
    "time": "2023-09-15 18:38:20"
  },
  {
    "transCount": 1,
    "time": "2023-09-15 18:38:35"
  },
  {
    "transCount": 1,
    "time": "2023-09-16 00:04:38"
  },
  {
    "transCount": 1,
    "time": "2023-09-16 01:27:49"
  },
  {
    "transCount": 1,
    "time": "2023-09-18 19:44:28"
  },
  {
    "transCount": 1,
    "time": "2023-09-18 22:08:46"
  },
  {
    "transCount": 1,
    "time": "2023-09-19 00:40:35"
  },
  {
    "transCount": 1,
    "time": "2023-09-19 00:46:51"
  }
]

let tempArr = []
let newArr = []
list.forEach((o) => {
  const time = o.time.substring(0, 10)
  if (tempArr.indexOf(time) === -1) {
    newArr.push({time: time, count: [o.transCount]})
    tempArr.push(time)
  } else {
    newArr[tempArr.indexOf(time)].count.push(o.transCount)
  }
})
console.log(newArr)