Return field names using Arcade function in ArcGIS Online

Question

I'm trying to write an expression for a pop up in ArcGIS Online that will display the name of the fields if there is a specific value under those fields for each feature. I adapted the following script that I found online.

var i = 0
var features = [];

function addvalue(feat) {
    if (!IsEmpty(feat)) {
        features[i++] = feat;
    }
}

addvalue($feature.schoolCommGardenQuarter);
addvalue($feature.smarterLunchQUARTER);
addvalue($feature.schoolWellnessQuarter);
addvalue($feature.keysNAPSACCquarter);
addvalue($feature.healthConcessionsQuarter);
addvalue($feature.foodPantryBackpackQuarter);
addvalue($feature.farmMarketorPopUpQuarter);
addvalue($feature.rydQUARTER);
addvalue($feature.directEd);
addvalue($feature.onetimeRYDEventQuarter);

return Concatenate(features, ";")

This runs without issue but it returns the values as a concatenated list (such as [YES;NO;YES;YES]). I want to edit the above script so that it returns a text string of the field names that have YES as a value.

I have since edited my script so that the if statement evaluates for the 'yes' value. I still am having trouble figuring out how to access and return the field names rather than the 'yes' values.

var i = 0
var features = [];

function addvalue(feat) {
    if (feat == 'Yes') {
        features [i++] = feat;
    }
}

addvalue($feature.schoolCommGardenQuarter);
addvalue($feature.smarterLunchQUARTER);
addvalue($feature.schoolWellnessQuarter);
addvalue($feature.keysNAPSACCquarter);
addvalue($feature.healthConcessionsQuarter);
addvalue($feature.foodPantryBackpackQuarter);
addvalue($feature.farmMarketorPopUpQuarter);
addvalue($feature.rydQUARTER);
addvalue($feature.directEd);
addvalue($feature.onetimeRYDEventQuarter);

return Concatenate(features, ";")

Answer 1

The only way I could see doing it is to add an argument in your function for the field name. You have to add it manually to each addvalue call

function addvalue(feat, field) {
    if (feat == 'Yes') {
        features[i++] = field;
    }
}

addvalue($feature.schoolCommGardenQuarter, "schoolCommGardenQuarter");

Answer 2

I just had to do this, came across your question and have a solution.

Iterate $feature as below. Drop this into the Arcade playground and see:

var returnstring = "AllValues"
for (var i in $feature) {
    returnstring = returnstring + ":" + i + ":" + $feature[i]
}
return returnstring