Arcade expression to decode values

[AndrewL]

I am trying to use an Arcade expression to display coded values in a popup in ArcGIS Online, but it is not working. I am using the code from the decode example. It does not display in the popup. No error message is given in the popup.

var code = $feature.dn;
var decodedValue = Decode(code, 2, 'Non-Severe', 3, 'Marginal', 4, 'Slight', 'Other');

I am not the author of the map service. The dn field is an esriFieldTypeDouble. Thank you.

[KenBuja]

What are the values that are possible for dn? Can you share that service or provide a list of some of the values?

[AndrewL]

Sure it is a public service from NWS: Layer: Day 1 Convective Outlook (ID: 1) 

Possible values are 2, 3, 4, 5, 6, and 7.

[KenBuja · Accepted solution]

You needed to state what value to return. See the documentation about this.

var code = $feature.dn;
var decodedValue = Decode(code, 2, 'Non-Severe', 3, 'Marginal', 4, 'Slight', 'Other');
decodedValue;‍‍‍‍‍‍‍‍‍‍‍‍‍‍  //return decodedValue; also works‍‍‍‍‍‍

or it could be a single line expression.

Decode($feature.dn, 2, 'Non-Severe', 3, 'Marginal', 4, 'Slight', 'Other');‍‍‍‍
// return Decode($feature.dn, 2, 'Non-Severe', 3, 'Marginal', 4, 'Slight', 'Other');‍‍‍‍ to be more explicit‍‍

[AndrewL]

Great! Thanks, that worked.