Javascript for/in loop issue with process dataset items

[Armando Martires]

Hello,

I'm using a Run Javascript operator with the following code as an example:

var logging = true;

function log(sLogEntry) {
  if (logging) Process._DEBUG += sLogEntry + "\n";
}

typeOfStringArraySingle = typeof(Var_String_Array_Single);
log("Type of Var_String_Array_Single = " + typeOfStringArraySingle);
for (var key in Var_String_Array_Single) {
  if (true) log(key + " = " + Var_String_Array_Single[key]);
}

This gives me no errors but never enters the for loop. I also tried logging a static string value.

On the other hand if I run this:

var logging = true;

function log(sLogEntry){
  if (logging) 
	Process._DEBUG += sLogEntry + "\n";
}

var myArray = [];
myArray.push("Test 01");
myArray.push("Test 02");
for (var key in myArray)
  if (true) log(key + " = " + myArray[key]);

var myArray2 = new Object();
myArray2["foo"] = "Nin";
myArray2["bar"] = "ja!";
for (var key in myArray2)
  if (true) log(key + " = " + myArray2[key]);

This works perfectly as expected.

Certainly I'm doing something wrong or I have wrong expectations on the Process Dataset.
Can anyone explain the right approach for this?

Regards,

Armado Martires