Data design problem. C / pointer style is not good at this JSON-structs style of programming. I agree that algebraic (like Haskell's) datatypes could help rulin

Data design problem. C / pointer style is not good at this JSON-structs style of programming. I agree that algebraic (like Haskell's) datatypes could help ruling out some invalid objects here. On the other hand, you can reap huge benefits from data-oriented programming (basically, make a separate email table that has a "foreign key" to the customer table) to do processing in the large. This is where C is a very good fit and you have no null pointers :-)