I have been working with fields that are similar and I have been using id's within in the fields to tell them a apart.
for example:
I have 3 fields for every route: R_{route}, R_{route}_ALT, R_{route}_BRD
I also have a list of all the routes as field that I could use to loop through, but instead I have to loop through all of the fields and see if they have the value in the field, but it would be much better if we could use. Concatenation or string formatting for selecting fields.