Refactoring Imperative Code to fp-ts

This skill provides comprehensive patterns and strategies for migrating existing imperative TypeScript code to fp-ts functional programming patterns.

Table of Contents

1. Converting try-catch to Either/TaskEither
2. Converting null checks to Option
3. Converting callbacks to Task
4. Converting class-based DI to Reader
5. Converting imperative loops to functional operations
6. Migrating Promise chains to TaskEither
7. Common Pitfalls
8. Gradual Adoption Strategies
9. When NOT to Refactor

1. Converting try-catch to Either/TaskEither