ApplyMap functions on two different fields

[cliff_clayman]

I have two ApplyMaps that I am using to create a new field. The two ApplyMaps check for a value in the Supplier Number and Supplier Name field. Sometimes I do not always have a value in the number field, so I want to check the name field. I want to create a new field using these ApplyMaps, but I am not sure how to write it so that each ApplyMap checks against the proper field. 

The first ApplyMap looks like this:

ApplyMap('Supplier_NumberMapping'),[Supplier Number]

The second one looks like this:

ApplyMap('Supplier_NameMapping'),[Supplier Name]

I want to do something like this...

ApplyMap('Supplier_NumberMapping',[Supplier Number),ApplyMap('Supplier_NameMapping'),[Supplier Name] as ExceptionName

How do I format the above expression to work properly to create the new field?

[devan9876 · Accepted solution]

I would try

ApplyMap('Supplier_NumberMapping',[Supplier Number],ApplyMap('Supplier_NameMapping',[Supplier Name])) as ExceptionName,

OR

if(Not IsNull([Supplier Number]),
ApplyMap('Supplier_NumberMapping',[Supplier Number]),
ApplyMap('Supplier_NameMapping',[Supplier Name])
) as ExceptionName