Javascript 1.7 in Thingworx Server-side script

[jyoo1]

Hello,

I'm trying to use server-side script more effectively, but I got some troubles on that.

First, As I have known, Thingworx Server-side script uses Rhino 1.7R4 which is based on Javascript 1.7. Then the script should support the functions of Javascript 1.7 such as "let".

But when I use the "let" statement in the script, it comes out "Sytanx Error". I think Rhino has no problem on that, then is this problem of javascript syntax checker of Thingworx?

Second, This is similar problem with above. If I use "for ~ in" statement on Array, then It makes the output weird.

Example codes is below.

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1) Syntax Error of "let"

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2) Error of "for each ~ in". it outputs unknown sentence starts with "_function".

If anybody knows this kind of problems and reasons, please reply. Thanks.

[CarlesColl · Accepted solution]

On TW services there isn't much difference between var and let, as there "isn't" global scope ( it's just the service context which starts and ends on service calls ), then the difference between booth are minimum on a service scope.

To iterate arrays as far as I know:

// -- Calls myFunction(item,index) for each array item

myArray.forEach(myFunction);

// -- Iterates over each array item and sets item with it's value

for each(item in myArray) {}

// -- Iterates over each array item and sets index with the item's index on the array

for (index in myArray) {}

// -- Of course the "length" way

for (var i=0;i<myArray.length;i++) { }

* On all this samples the only one which can "simulate" let behaviour it's the first one, as all variables in myFunction will be local to myFunction, all the other ( the item, index and i samples ) you will have the variables defined out of for loop scope.

[jyoo1]

Thanks for your quick reply.

So as I understand, Thingworx script language doesn't follow ECMA-262 standard not completely. It has own customized version of Rhino. Am I right?

And for "for each" statement, I think it has a bug on that as I wrote at first.

If I log the length of the array lilke:

It makes the length of 'ar' as 5 which originally 4.

And If I output the elements of array.

It includes weird value on last index such as:

[CarlesColl]

Hi,

I've tested your exact code and I get 4 not 5, I've tested it on 6.5.13 and 7.3.9, on which version are you testing it?

And yes it's a customized version of Rhino

[jyoo1]

I am using ThingWorx 8.0.1. Actually this morning I retry the situation but the bug has gone. Now it gets 4.

I'm not sure what is happening in my ThingWorx. Anyway thanks for your help!