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HC15-15. Haskell Chapter 15 Practical Tasks: Handling-Errors |
This lesson dives into error handling in Haskell, focusing on two main categories: Compile-time errors Compile-time errors are a developer’s best friend! They help catch mistakes before the program runs, ensuring that incorrect code doesn’t reach end users. Haskells strong type system and purity significantly reduce runtime errors by enforcing correctness at compile time. This is why many say, "In Haskell, if it compiles, it works." Runtime errors While Haskell minimizes runtime errors, they can still occur due to unpredictable real-world conditions—such as out-of-memory issues, missing files, network failures, or unexpected user behavior. Unlike compile-time errors, these happen when the program is already running, potentially frustrating users. The lesson covers how to handle runtime errors gracefully while leveraging Haskells type system to push as many errors as possible to compile time. By doing so, developers can build more reliable software, ensuring a smoother experience for both users and maintainers. |
