Railway Pattern

The Railway Pattern enables fault-tolerant function composition by chaining operations that can either succeed or fail gracefully. Using Ruby gems like Dry Monads and Pipeable, developers can build robust pipelines where each step produces either a Success or Failure result, allowing errors to bubble up without breaking the entire flow. The pattern is demonstrated through building an API client that handles HTTP requests, JSON parsing, validation, and data modeling as a single composable pipeline, making code more resilient to network issues and data problems.