result-patterns

What problem does it solve?

This Skill provides a robust, type-safe approach to error handling by using a Result type, eliminating the need for exceptions and ensuring all fallible operations are explicitly managed. It leads to more predictable and maintainable code.

Core Features & Use Cases

• Core Result Type: Defines Ok and Err variants for success and failure, making error handling explicit in type signatures and preventing unexpected runtime crashes.
• Transformation Functions: Includes map for transforming successful values, flatMap for chaining operations that might fail, and unwrapOr for providing default values in case of an error.
• Async Result Patterns: Offers tryCatch for safely wrapping asynchronous operations that might throw, converting promise rejections into explicit Err results.
• Use Case: A developer is writing a function that fetches data from an external API, which might fail. They can use this skill to wrap the API call in a Result type, then use flatMap to process the successful data or unwrapOr to provide a fallback in case of an error.

Quick Start

Refactor the 'fetchUserData' function in 'src/services/user.ts' to return a Result type instead of throwing an error, handling both success and failure cases explicitly.