Arcade expression returns nothing

[RabinSubedi]

Hello Esri Community,

I am using an array in arcade to add one additional column to attribute table in arcgis online. While testing this arcade expression, it gives correct result. However when I apply it to all features, it returns nothing in the target field. Can anyone help me with this?

Thanks!

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return names[$feature.PvtID]

[DavidPike]

What do you want to do exactly? Ensure the PvtID is an integer or coerce it to one.

[RabinSubedi]

Hello @DavidPike, thanks for your reply.

I have 1140 polyline features and I need to add their street names as a new field based on their pavement ID (here "PvtID", a unique value for each feature). I prepared an array of names in sequential order of pavement ID and I want to return a name corresponding to id of each pavement. When I test this code in arcade, it gives desired result, but when I click 'ok', it says 'all 1140 features are updated' and returns nothing in target field: 'street_names'.

Also, the PvtID value is an integer.

[DavidPike]

If there's no error messages I'm not sure what's going on without seeing the entire process.  Perhaps a table join based on the ID field would be much better in any case.

[RabinSubedi]

As per my understanding, table join creates a new feature layer rather than updating the existing one. Since I have used existing layer in many webmaps and different widgets in web appbuilders, I don't want to do that all over again. Is there any way I can update the existing layer with a new column?

[DavidPike]

I can only think of some size limitation in the code block, but that doesn't make a great deal of sense.  Can you trial the expression with a  small number of names in the names list to rule this out?   The field you're writing to is also text/string?

[RabinSubedi]

You are right @DavidPike , Seems like it works only for values less than 1000. I broke the array in two parts and it worked!

Thanks!