Get position id from position table in ff

Summary:

How to get position id based on Position name in fast formula

Content (required):

We have a table Values where we have defined three position based on type. In FF, we use table values to get position name, after getting position name i want to get position id from position table and based on that psoitoin_id will be getting through assignment_id,

is there any way to get it done through Array in Fast formula.

Version (include the version you are using, if applicable):

21D

Code Snippet (add any code snippets that support your topic, if applicable):