Free applicatives, the handle pattern, and remote systems
18 hours ago
- #Haskell
- #ERP Integration
- #Functional Programming
- Refactored code for interacting with an ERP system using free applicatives and the handle pattern.
- ERP system required lookups before creating records, necessitating batching for efficiency.
- Used free applicatives to enable static analysis of requests without execution.
- Handle pattern in Haskell allows for dependency injection-like behavior.
- Free structures provide a way to make types instances of classes with minimal boilerplate.
- Demonstrated how to build and run queries using free applicatives.
- Showed benefits like request optimization, error accumulation, and testing with saved requests.
- Discussed limitations of losing monadic interface and potential alternatives like Selective functors.