When a text-list is the input, a text-list of the field values is the output.
fields := "subject" : "com_unique" : "relation";
@Implode( @GetField( fields ) ; "|" )
The above code gives me a pipe-separated string of the values in the subject, com_unique and relation-field.
Not the most useful tip I've blogged about, but probably nice to know.. :)