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Error Handling

For a variety of reasons, including null values from your code, you want to effectively use the Option Try, and Either for handling errors.

Pure functions never throw exceptions, so in practice writing pure functions requires us to wrap exceptions in some monadic collections like Option, Try or Either

Summary of Standard Error Handlers

Base Type	Success Case	Failure Case
Option	Some	Node
Try	Success	Failure
Either	Right	Left

When to use

Option - When you don’t need the error message. Or as a replacement for null Try - Good for wrapping Exceptions Either - An alternative to Try when you need to keep the error message