谷歌应用程序脚本TypeError:无法调用未定义的方法"substring"

Question

我有一个谷歌表单,提交时调用"on form submit"函数,包括javascript .substring(start,finish)方法.奇怪的是,在我的测试代码中它工作正常但是当它实际上必须使用"提交时"代码实现时,我得到一个错误:TypeError:无法调用未定义的方法"substring".(第26行,文件"代码")

这是我的测试代码工作正常(调用Browser.msgBox)

function test()
{

  var ss = SpreadsheetApp.getActiveSpreadsheet();
  var sheet = ss.getSheets()[0];  //assumes that sheet containing header columns is first sheet
  var lastRow = sheet.getLastRow();
  var lastColumn = sheet.getLastColumn();
  var values = SpreadsheetApp.getActiveSheet().getRange(1, 1, 1, lastColumn).getValues();

  //variables with form submit data would go here but not for this testing


  var dataDump = "\n\n"
  var headerValue = values[0][5];
  var headerValue5 = headerValue.substring(0,5);

  Browser.msgBox(headerValue5);
}

此代码生成错误...

function onFormSubmit(e) 
{

  var ss = SpreadsheetApp.getActiveSpreadsheet();
  var sheet = ss.getSheets()[0];  //assumes that sheet containing header columns is first sheet
  var lastRow = sheet.getLastRow();
  var lastColumn = sheet.getLastColumn();
  var values = SpreadsheetApp.getActiveSheet().getRange(1, 1, 1, lastColumn).getValues();

  //define variables
  var timeStamp = e.values[0];
  var name = e.values[1];
  var email = e.values[2];
  var emailSubject = "QMG periodic wRVU responses for ";
  emailSubject = emailSubject + timeStamp;
  var dataDump = "\n\n";

  for (var i = 3; i <= e.values.length; i++)
  {
    var headerValue = values[0][i];
    var responseValue = e.values[i];
    var responseValue5 = responseValue.substring(0,5);  //error here !!!!!!
    i++;  //increment i to get detailsValue
    var detailsValue = e.values[i];
      dataDump = dataDump + headerValue;
      dataDump = dataDump + ":\n\n";
      dataDump = dataDump + responseValue;
      dataDump = dataDump + "\n";
      dataDump = dataDump + detailsValue;
      dataDump = dataDump + "\n\n*********************\n\n";

  }

  MailApp.sendEmail(email, emailSubject, dataDump);  
}

删除注释"// error here !!!!!!" 工作正常,所以我知道它正在读取数组数据.计划是使用.substring()来确定一些格式,以便让它工作.

提前致谢...

Answer 1

这里没有专业人士,但我认为我对这个问题有所预感.

var array = ["aaa", "bbb", "ccc"];

for (var i = 0; i <= array.length; i++) {
    console.log(array[i]);
}

看看运行上面的代码时,我会在最后得到一个console.log undefined,
因为i <= array.length.

运行一个字符串的方法好像.substring上undefined引发错误.

更改<=的<,你应该是好去.