topic arcade calculation - once() or only when null in ArcGIS Field Maps Questions

arcade calculation - once() or only when null

PaulPetersen1 — Fri, 23 Sep 2022 22:05:07 GMT

I've been using Arcade calcuation expressions with good success in Field Maps. However, I'd like to know if it's possible to trigger the calculation only when the associated field is null. This would be similar to the once() operator, of the Survey123 whenEmpty calculation mode. Basically I want to make sure the calculation (the inspection date) doesn't get overwritten if the Smartform is opened at a later time after initial collection.

Re: arcade calculation - once() or only when null

KenBuja — Fri, 23 Sep 2022 22:13:47 GMT

The IsEmpty function returns "true" if the value is null or empty ('').

If (!IsEmpty($feature.InspectionDate)){ //save a new Inspection Date }

Re: arcade calculation - once() or only when null

PaulPetersen1 — Fri, 23 Sep 2022 23:06:31 GMT

Thanks, that helps.