实际上，我有一个对象列表，输出如下：

[
    {
      "eventDate": "August 15, 2022 at 9:00 AM",
      "title":        "Dr.",
      "first_name":   "Jane",
      "last_name":    "Doe"
    },
    {
      "eventDate": "August 15, 2022 at 1:00 AM",
      "title":        "Dr.",
      "first_name":   "Jane",
      "last_name":    "Doe"
    }
  ]

从本质上说，正如您在上面看到的，结果几乎相同，除了eventDate中列出的时间。时间对我来说没有区别，我想消除基本相同的重复条目，就像上面一样，唯一可以不必匹配的是时间。
数据以字符串形式保存在数据库中，因此不像更改日期格式那么简单。因此，到目前为止，我所做的如下（对于第一个条目）：

var fullDate = res.items[0].sessionStartTime
console.log(fullDate);

var month = fullDate.split(' ')[0];
var day = fullDate.split(' ')[1];
var year = fullDate.split(' ')[2];
var newDate = month + " " + day + " " + year

var formattedDate = new Date(newDate).toDateString();
console.log(formattedDate);

其输出formattedDate如下：Mon Aug 15 2022
我想要做的是将数组中的每个eventDate条目转换为新的日期格式输出，因此它看起来如下所示：

newArray = 
  [
    {
      "eventDate": "Mon Aug 15 2022",
      "title":        "Dr.",
      "first_name":   "Jane",
      "last_name":    "Doe"
    },
    {
      "eventDate": "Mon Aug 15 2022",
      "title":        "Dr.",
      "first_name":   "Jane",
      "last_name":    "Doe"
    }
  ]

因此，这样我就可以通过使用以下函数找到eventDate的不同值：

const unique = [...new Map(newArray.map((m) => [m.eventDate, m])).values()];

其应输出：

unique = 
  [
    {
      "eventDate": "Mon Aug 15 2022",
      "title":        "Dr.",
      "first_name":   "Jane",
      "last_name":    "Doe"
    }
  ]

谢谢！
编辑：
我的实际对象列表是：

[
    {
      formField7: "Test",
      amountDue: "Test",
      serviceType: "Course",
      staffMember: "Test",
      formField2: "Test",
      formResponse2: "-",
      formResponse7: "Test",
      formField6: "Test",
      formField10: "Test",
      paymentStatus: "Test",
      formField1: "Test",
      dateOfBooking: "Test",
      _id: "Test",
      _owner: "Test",
      _createdDate: "Test",
      serviceName: "Test",
      formField8: "Test",
      paymentMethod: "Test",
      groupSize: "1",
      formField4: "Test",
      formResponse1: "Test",
      formField5: "Test",
      _updatedDate: "Test",
      formResponse5: "Test",
      eventDate: "August 15, 2022 at 9:00 AM",
      formResponse8: "Test",
      couponName: "Test",
      formResponse0: "Test",
      formResponse11: "Test",
      clientEmail: "Test",
      formField9: "Test",
      attendanceStatus: "Test",
      sessionDuration: "Test",
      formField3: "Test",
      formResponse4: "-",
      clientAddress: "-",
      formResponse9: "Test",
      clientName: "Jane Doe",
      formField11: "Test",
      formResponse6: "Test",
      formField0: "Test",
      bookingStatus: "Test",
      clientPhoneNumber: "Test",
      amountPaid: "Test",
      formResponse10: "Test",
      formResponse3: "Test"
    },
    {
      formField7: "Test",
      amountDue: "Test",
      serviceType: "Course",
      staffMember: "Test",
      formField2: "Test",
      formResponse2: "-",
      formResponse7: "Test",
      formField6: "Test",
      formField10: "Test",
      paymentStatus: "Test",
      formField1: "Test",
      dateOfBooking: "Test",
      _id: "Test",
      _owner: "Test",
      _createdDate: "Test",
      serviceName: "Test",
      formField8: "Test",
      paymentMethod: "Test",
      groupSize: "1",
      formField4: "Test",
      formResponse1: "Test",
      formField5: "Test",
      _updatedDate: "Test",
      formResponse5: "Test",
      eventDate: "August 15, 2022 at 1:00 AM",
      formResponse8: "Test",
      couponName: "Test",
      formResponse0: "Test",
      formResponse11: "Test",
      clientEmail: "Test",
      formField9: "Test",
      attendanceStatus: "Test",
      sessionDuration: "Test",
      formField3: "Test",
      formResponse4: "-",
      clientAddress: "-",
      formResponse9: "Test",
      clientName: "Jane Doe",
      formField11: "Test",
      formResponse6: "Test",
      formField0: "Test",
      bookingStatus: "Test",
      clientPhoneNumber: "Test",
      amountPaid: "Test",
      formResponse10: "Test",
      formResponse3: "Test"
    }
]

在数据库上运行查询后，将其输出为JSON。