Better Form Model Validation
Earlier this month, I wrote about validating temporary models for forms. The validation returned .complete or .incomplete, which doesn't help much when you want to show what did go wrong. So I came up with a richer validation syntax.
Validate Temporary Form Models
Ian Keen posted an article about type-safe temporary models. You would use them like scratch pad contexts in Core Data: in forms, you collect information into these temporary models and then generate your real objects from them.