topic Re: ARCED expression for PopUp in ArcGIS Online Questions

ARCED expression for PopUp

HarishMuni — Wed, 17 Nov 2021 14:26:25 GMT

I want to configure a Popup in a webmap in AGOL
I have data fields that define purposes in a particular area.
 for Example: Purpose A field  - if the purpose exists the field value will be- Purpose A, and so on

I want only the fields that have a value to appear in the popup
Purpose A-Butterfly Garden
Purpose B-Null
Purpose C-Null
Purpose D-Dog Garden
Purpose E-Null
the Wonted end result - 
Butterfly Garden, Dog Garden

and not
Butterfly Garden, , , Dog Garden,
 
I was thinking of writing an expression in ARCED that would create the list

How do I write in ARCED an expression that asks first if there is a value in the field before it  plants the value in the POPUP  to avoid empty spaces

Thanks
Ori

Re: ARCED expression for PopUp

JasonGlidewell — Wed, 17 Nov 2021 14:30:37 GMT

If I understand correctly, it sounds like an simple if/else will get it done for you.

Happy to help iif you need assitance setting up the argument.

if ( IsEmpty($feature["OCC_ELUM"] )) {
return "A"
}
else {
return "B"
}

Re: ARCED expression for PopUp

JohannesLindner — Thu, 18 Nov 2021 06:48:31 GMT

// build an array of the purpose field values var purposes = [ $feature.PurposeA, $feature.PurposeB, $feature.PurposeC, $feature.PurposeD, $feature.PurposeE ] // use that to build an array of non-empty purpose values var non_empty_purposes = [] // empty array for(var p in purposes) { // loop through purposes if(!IsEmpty(purposes[p])) { // if purpose is not empty (null or "") Push(non_empty_purposes, purposes[p]) // append to array } } // return the concatenated array as string return Concatenate(non_empty_purposes, ", ")

Re: ARCED expression for PopUp

JohannesLindner — Thu, 18 Nov 2021 06:54:32 GMT

A simple if/else is not going to work here, because any number of purpose fields can have values. If you do a simple if/else chain like below, only the first purpose will be returned, completely ignoring possible other purposes.

// THIS IS WRONG, DON'T DO THIS if(!IsEmpty($feature.PurposeA)) { // if PurposeA is filled ("Butterfly Garden" in the example), the expression will end here. // Other purpose fields (PurposeD - "Dog Garden") will be ignored! return $feature.PurposeA } if(!IsEmpty($feature.PurposeB)) { return $feature.PurposeB } if(!IsEmpty($feature.PurposeC)) { return $feature.PurposeC } if(!IsEmpty($feature.PurposeD)) { return $feature.PurposeD }

Re: ARCED expression for PopUp

JasonGlidewell — Thu, 18 Nov 2021 13:39:33 GMT

Maybe I am misunderstanding, but the way I've done this in the past is to use nested arguements in the if expression.

EX. if(IsEmpty($feature.Field_A)) && (IsEmpty($feature.Field_B)) == false){

return $feature.Field_B