javascript - 如何根据时间戳过滤对象数组

Question

我有超过 1000 个对象数组，数组中的每个对象都包含日期和时间字段。该记录每秒插入到数据库中，如下所示。在这里，我想要获取过去 7 天的记录，包括基于当前日期+小时+秒的分钟和秒。

示例:

[{
    "date": "11/25/2016 08:45:58",
    "energy": 29940913188,
    "power": 6783,
    "time": 217781102
}, {
    "date": "11/25/2016 08:46:01",
    "energy": 29940913267,
    "power": 6792,
    "time": 217781105
}, {
    "date": "11/25/2016 08:46:02",
    "energy": 29940913318,
    "power": 6791,
    "time": 217781107
}, {
    "date": "11/25/2016 08:46:04",
    "energy": 29940913344,
    "power": 6797,
    "time": 217781108
}, {
    "date": "11/25/2016 08:46:05",
    "energy": 29940913396,
    "power": 6816,
    "time": 217781110
}, {
    "date": "11/25/2016 08:46:07",
    "energy": 29940913421,
    "power": 6798,
    "time": 217781111
}, {
    "date": "11/25/2016 08:46:08",
    "energy": 29940913473,
    "power": 6804,
    "time": 217781113
}]

请告诉我如何使用 JS 或 jquery 来做到这一点

Answer 1

您可以使用如下过滤器来实现此目的。

data.filter((d) => {
  return new Date(d.date).getTime() >= seventhDay.getTime();
});

这里，如果您的date数据类型已经是Date，则无需再次转换为日期new Date(d.date).

此外，它也可以在没有 getTime() 的情况下工作，如下所示。

return new Date(d.date) >= seventhDay;

var data=[{"date":"11/20/2016 08:45:58","energy":29940913188,"power":6783,"time":217781102},{"date":"11/25/2016 08:46:01","energy":29940913267,"power":6792,"time":217781105},{"date":"11/25/2016 08:46:02","energy":29940913318,"power":6791,"time":217781107},{"date":"11/25/2016 08:46:04","energy":29940913344,"power":6797,"time":217781108},{"date":"11/25/2016 08:46:05","energy":29940913396,"power":6816,"time":217781110},{"date":"11/25/2016 08:46:07","energy":29940913421,"power":6798,"time":217781111},{"date":"11/21/2016 08:46:08","energy":29940913473,"power":6804,"time":217781113}]

var seventhDay = new Date();
seventhDay.setDate(seventhDay.getDate() - 7);

var filteredData = data.filter((d) => {
  return new Date(d.date).getTime() >= seventhDay.getTime();
});

console.log(filteredData);