topic Re: Popup calculations with Arcade - with null values in ArcGIS Online Questions

Popup calculations with Arcade - with null values

Jennifer_T — Wed, 11 Jun 2025 21:12:20 GMT

Hi, I'm trying to calculate the areas and lengths of intersecting layers within a selected polygon. I found a really helpful script here: Solved: Popup calculations with Arcade - Esri Community. It has gotten me to 90% to where I need to be. The problem is that this arcade script doesn't like blank or null values. I believe HasKey is the culprit. I need these "blank" values calculated in the popup (and renamed if possible). Is there a solution or workaround? maybe incorporating DefautValue or IsEmpty somehow?

Thank you

var managementareas = FeatureSetByName($map,"ManagmentAreas");

var int_ma = Intersects($feature, managementareas)

var int_dict = {}

var xs = 0

for (var i in int_ma){
    var xs = AreaGeodetic(Intersection($feature, i), 'acres')
    if(HasKey(int_dict,i.Name)){
        int_dict[i.NAME] += xs
    } else {
        int_dict[i.NAME] = xs
    }

var out_str = 'Management Area Acreage: ';

for (var d in int_dict){
    out_str += '\n' + d + '\t|\t' + Text(int_dict[d], '#,###.#')
}}

return out_str

Re: Popup calculations with Arcade - with null values

KenBuja — Thu, 12 Jun 2025 15:10:30 GMT

Create a key that uses a substitute string if i.NAME is blank (line 9) and use that key for the dictionary (lines 10, 11, and 13). Note that I moved the calculation of out_str outside the for loop. It doesn't need to be calculated for each item in the intersected FeatureSet.

Re: Popup calculations with Arcade - with null values

Jennifer_T — Thu, 12 Jun 2025 15:19:13 GMT

Amazing! this did the trick