SharePoint List Form: Multi Select Column Detection

[sperry1625]

I have a multi-select Person column, but this would likely apply to any multi select column in SharePoint. When retrieving data from a SharePoint list, and a column is multi select, in my case a Person column, what is returned varies based on whether the column has 1 or multiple selections.  If there are multiple selections it returns a table of those entries, if it's a single it returns a record.  When working with that column the functions available will vary.  In my example I want to check if the current user is selected in the column. The test conditions I have are as follows:

Set( gblUser = User().Email );
Set( gblApp, LookUp( Applications, 'Name (Title)' = gblAppName ) );

// Test if only a single person is selected in column
Set( gblIsAdmin, If( gblUser in gblApp.Admins.Email, true, false ) );

// Test if multiple users are selected in the column
Set( gblIsAdmin, If( IsBlank( LookUp( gblApp.Admins, Email = gblUser ) ), false, true ) );

The problem is how to test when to use one over the other. Currently the value only has a single selection, which flags the second test condition as an error because gblApp.Admins is an incorrect type for a Lookup. The flag goes away if Admins has multiple selections.  The first test only works if there is a single selection otherwise always returns false if multiple selections. 

What can I use to test the condition regardless of whether there is one or more selections in the column?

Thanks.

[sperry1625 · Accepted solution]

I solved this issue.  There maybe a better way but the below worked for me.

Set( gblApp, LookUp( Applications, 'Name (Title)' = gblAppName ) );

Set( gblUser, User().Email );

// The values for Admins and Owners is copied into a Collection.
// *****************************************************************************
// This is done because the Type of these columns will be different depending on 
//  whether there is one or multiple Persons selected. If only one the data type
//  is Record, if multiple the data type is Table. Collection Creation will take
//  either as a parameter to create the collection. So in the end you have the
//  same data type regardless of what is in the column.  This allows the tests
//  that follow to be the same.
Collect( gblAdmins, gblApp.Admins );
Collect( gblOwners, gblApp.Owners );

Set( gblMembership,
    {
        IsAdmin: If( IsBlank( LookUp( gblAdmins, gblUser in Email ) ), false, true ),
        IsOwner: If( IsBlank( LookUp( gblOwners, gblUser in Email ) ), false, true ),
        IsSubmitter: false
    }
);

// This is optional, I clear the collections as they are no longer needed.
Clear(gblAdmins);
Clear(gblOwners);

I hope this helps someone else.