How to fix this “TypeError: Cannot find function g

问题:

I'm using this function in a Google Apps Script:

function dateDiffYears() {
  var datas = [ [Date(2005, 7, 20), Date(2004, 2, 17)],
              [Date(2008, 9, 1),Date(2007, 5, 25)], 
              [Date(2010, 11, 2),Date(2010, 7, 28)], 
              [Date(2014, 0, 24),Date(2013, 1, 27)] ];

  for (var i= 0; i < datas.length; i++){
    var d1 = datas[i][0];
    var d2 = datas[i][1];
  Logger.log("d2  = " + d2 );
  Logger.log("d2 instanceof Date = " + (d2 instanceof Date) );
  Logger.log("d1  = " + d1 );
  Logger.log("d1 instanceof Date = " + (d1 instanceof Date) );
    var t2 = d2.getTime();
    var t1 = d1.getTime();
    Logger.log("d1 = " + t1);
    Logger.log("d2 = " + t2);
    var result =  parseInt( (t2-t1)/(24*3600*1000) );
    Logger.log("diff = " + result);
       }
}

As I can remember, this function worked in the past. But now, when I run it, I got this error message: TypeError: Cannot find function getTime in object Sun Jan 26 2014 10:23:10 GMT-0200 (BRST). (line 22, (line 22 is var t2 = d2.getTime();). I don't understand this error. What is wrong with the Date(yyyy, mm, dd) formate? And why the error message is talking about today date (ex:Sun Jan 26 2014 10:23:10 GMT-0200 (BRST)) since I'm not using New Date()?

How to fix it?

回答1:

I don't understand this error because clearly Sun Jan 26 2014 10:23:10 GMT-0200 (BRST) is a date object.

Clearly it isn't a Date object. Perhaps it's a string, or some Google Apps Script object that gets output a bit like a date but doesn't have a getTime function. Perhaps it's a Range object containing a date.

If it were a Date object, it would have the getTime method.

How to fix it?

Without knowing how you get d1 and d2, it's impossible to say. If it's a Range object, for instance, perhaps you can get the date via getValue.

The first step is to figure out what the object actually is. Perhaps setting a breakpoint on the first line of dataDiff and inspecting the arguments.

回答2:

In your code:

function dateDiffYears() {
  var datas = [ [Date(2005, 7, 20), Date(2004, 2, 17)],
              [Date(2008, 9, 1),Date(2007, 5, 25)], 
              [Date(2010, 11, 2),Date(2010, 7, 28)], 
              [Date(2014, 0, 24),Date(2013, 1, 27)] ];

creates arrays of strings representing the current date and time, it doesn't create Date objects. Further, all arguments are ignored. Date(andything in here) is equivalent to:

(new Date()).toString();

per ECMA-262:

All of the arguments are optional; any arguments supplied are accepted but are completely ignored. A String is created and returned as if by the expression (new Date()).toString()…