Hi forum. I have two arrays array1 = {1;2;2;3} array2

Look into displayValue function. This might be of use to you in such scenario.

What exactly is your intended outcome?

You can also try something like index({"A", "B", "C", "D"}, wherecontains(2,{1,2,2,3})) or index(array2, wherecontains(array3[i],array1)) with an apply() on array3.

To make it as simple as possible shelzle, in my situation array1 is a list of customers {customer1;customer2;customer2;customer3} and array2 is the data associated with these customers.

So in this case, customer1 is associated with A, customer2 is associated with B and C and customer3 is associated with D. I have to send each customer an email with their specific data. If I sent out these emails based on array1, then customer2 will get two emails, when I actually want to send customer2 one email with B and C.

This is why I created array3, but unfortunately if I send these emails based on array3, the customer2 will get one email with B.

My intended outcome is for customer1 to receive an email with A, customer2 to receive an email with B and C and customer3 to receive an email with D. I hope this all makes sense. And obviously all three of these arrays will be of variable length.

Did you think about building a loop in your model that iterates on array3. For each item using wherecontains and index to build a temp list of data to be sent by mail.

Please be aware that wherecontains() is only fully supported on 7.3.

you can use array1 and array2 as is in displayvalue() function. I still don't know the use of array3. Can you please post what is the actual requirement and your proposed solution ?