array.unshift() not working on NativeArray object

Classic Servoy
1

I want to add the item ‘%’ at the beginning of a value list so I use this code:

var arrayStatus = application.getValueListArray('status_off_acq');
arrayStatus.unshift('%');

But this code is not working, it says that “unshift is not a function”.
I noticed that the application.getValueListArray() function returns a NativeArray object (in my case is called org.mozilla.javascript.NativeArray@19f746) and not a regular Array object like [‘a’,‘b’,‘c’].

Is this a bug or should I handle NativeArray in a different way?

2

Hi Nicola,

Maybe you have to cast the variable to an Array.

var arrayStatus = application.getValueListArray('status_off_acq'); 
Array(arrayStatus).unshift('%');

Just thinking out loud :)

3

Thanks for the reply Robert, this indeed eliminates the error but .unshift() does not yet work.

Here’s the full code:

var arrayStatus = application.getValueListArray('status_off_acq')
var arrayStatus2 = arrayStatus

Array(arrayStatus).unshift('Tutti');
Array(arrayStatus2).unshift('%');

application.setValueListItems('off_acq_righe_filtro_status',arrayStatus,arrayStatus2);

What I’m trying to do is really simple: I use a popup global field with a valueList attached as a Filter for some related data and I want to show “Tutti|%” (translation: “All|%”) as the first value of the list.

4

What about the following code?

var arrayStatus = Array(application.getValueListArray('status_off_acq'));
var arrayStatus2 = arrayStatus;

arrayStatus.unshift('Tutti'); 
arrayStatus2.unshift('%'); 

application.setValueListItems('off_acq_righe_filtro_status',arrayStatus,arrayStatus2);
5

ROCLASI:
What about the following code?

var arrayStatus = Array(application.getValueListArray('status_off_acq'));

var arrayStatus2 = arrayStatus;

arrayStatus.unshift(‘Tutti’);
arrayStatus2.unshift(‘%’);

application.setValueListItems(‘off_acq_righe_filtro_status’,arrayStatus,arrayStatus2);

Nope.
The result is a list like this:

Tutti
[org.mozilla.javascript.NatveArray@87aefa]

:(

6

Well I did some quick testing (instead of guessing ;) ).

It seems that this VERY new function is not that polished.

var arrayStatus = application.getValueListArray('testvaluelist');

This results in a org.mozilla.javascript.NativeArray as shows in the debugger.
In fact in the debugger I can expand this variable and see the values inside this array.

application.output(arrayStatus.length);

This actually returns the correct count of values. 6 values in my case.

application.output(arrayStatus[0]);

However this returns NULL. (!?)

Casting the NativeArray to an Array results an array with 1 value. This is the Object itself.

My guess is that the getValueListArray() function returns a Java native array which is not compatible with JS arrays. No JavaScript Array functions can be used.
Maybe one of the Servoyans can comment on this ?

Btw this function is also not yet documented in the online help nor in the ServoyDevReferenceGuide2_2.pdf
But I know Marc Norman is working hard to catch up. :)

7

It seems we arrived to the same conclusions… :wink:
The docs and online help were my first stop, even before posting to the forum, I just hoped that someone knew how to handle NativeArrays…

Let’s wait for an official answer.