Railway-Oriented Programming (ROP)

Steve was intrigued by the Result type, but he still had questions.

Steve: This is great for individual operations, but what about when I have a series of steps that all need to succeed?

Julia: I’m glad you asked. Let me introduce you to Railway-Oriented Programming.

At the heart of functional programming is the drive for predictability and clarity. Although traditional error-handling techniques are powerful, they often scatter the error-handling logic across the codebase. ROP, inspired by this railway track-switching analogy, offers a cohesive, structured approach to error handling, keeping your code both expressive and streamlined.

ROP provides a systematic way to manage errors in a sequence of operations. Think of it as managing two parallel tracks: the success track (happy path) and the error track. Operations run sequentially on the happy path. However, as soon as an error is encountered, the flow is diverted to the error track...