How to create a leadsheet from a collection of parts in a score

[Stan Mulder]

I would like to create a lead sheet from a 7-piece jazz score where the
melody moves between trumpet, clarinet and trombone. Is there a suggested
way to do this without creating spaghetti code? 

Is it as simple as defining various clarinet, trumpet and trombone variables
that contain notes and then concatenate those notes into a single "lead
sheet" variable? 

Thanks group.