我有一个程序，它在CSV文件中生成报告。问题是，时间戳是Unix时间戳格式。所以我需要在forEach循环中访问特定的时间戳元素并修改它。我是JavaScript新手。如果是Python，那就没问题了。
代码如下所示：

for (let electronicRecord of result.Values) {
      fields.forEach((f, i) => csvData += electronicRecord[f] + (i == fields.length -1 ? "\n" : delimiter));
    }

我知道我想要更改的值是“ElectronicRecord[“TimeStamp”]，但是我如何在forEach循环中访问它呢？

for (let i in fields) {
        if (i == "TimeStamp") {
          csvData += electronicRecord[i]
        } else if (fields.indexOf(i) == fields.length - 1) {
        csvData += electronicRecord[i] + "\n";
      } else {
        csvData += electronicRecord[i] + delimiter;
      }
    }

这是我的主意，但似乎不起作用。fields是一个数组，其中包含CSV文件的“headlines”。
我的系统中的原始函数是：

// Please note, the format of a file path is device and operating system specific 
// You need to adapt the given path to your environment 
// Example for a Unified Comfort  device (Linux OS): /home/user1/data.dat 
// Example for a Unified PC-based device (MS Windows OS): C:\\Users\\Public\\data.dat 

const startDate = "2020-09-01 08:00:00.000";
const endDate = "2020-10-01 08:00:00.000";

let moreFollows = false;
let page = 0;

let fields = ["TimeStamp", "AuditProviderType", "AuditProvider", "ObjectReference","ObjectName", "OperationType", "OperatorStation", "User", "OldValue", "NewValue", "Reason", "Language", "Signature", "Integrity"];
let delimiter = ",";
let csvData = "";
fields.forEach((f, i) => csvData += f + (i == fields.length - 1 ? "\n" : delimiter));

do {
  try {
    const result = await HMIRuntime.Audit.SysFct.ReadElectronicRecord(startDate, endDate, page);
    moreFollows = result.More;
    for (let electronicRecord of result.Values) {
      fields.forEach((f, i) => csvData += electronicRecord[f] + (i == fields.length -1 ? "\n" : delimiter));
    }
    page++;
  } catch(ex) {
    HMIRuntime.Trace("Error reading electronic record. Error: " + ex.message);
    return;
  }
} while (moreFollows);

try {
  let fileName = "C:\\Users\\Public\\AuditFile.csv";
  await HMIRuntime.FileSystem.WriteFile(fileName, csvData, "utf8");
  HMIRuntime.Trace("Write file finished successfully");
} catch(ex) {
  HMIRuntime.Trace("Error writing file. Error: " + ex.message);
}