Question 1

How to use mo for error handling instead of if err != nil?

Accepted Answer

Mo provides Result[T] types to encapsulate outcomes. Use Ok() for successes and Err() for failures, then chain operations with Map and FlatMap for expressive, type-safe error handling without nested checks, as shown in the documentation.

Question 2

Mo vs go-funk or other FP libraries for Go: which is better?

Accepted Answer

Mo is more focused on monads and pure FP abstractions like Option and Result, while go-funk offers general utility functions. Mo is better for strict FP adoption, but has a steeper curve compared to lighter utility libraries.

Question 3

How to handle async operations with mo's Future or Task?

Accepted Answer

Use Future[T] for deferred computations or Task[T] for side-effecting async ops. They provide methods like Then and Catch for composition, similar to promises, with examples in the README for chaining and error handling.

Question 4

What is the performance impact of using mo in Go?

Accepted Answer

Mo avoids reflection and uses generics, so overhead is minimal. However, the README notes benchmarks are 'TODO,' and abstraction layers might introduce slight runtime costs compared to direct Go code, especially in hot paths.

Question 5

Can I mix mo with standard Go libraries easily?

Accepted Answer

Yes, but integration often requires wrapping standard calls. For instance, use Try() to convert error-returning functions to Result, or PointerToOption() for nil pointers, adding boilerplate for seamless use.

Question 6

How to chain multiple operations with mo's Option type?

Accepted Answer

Use methods like Map and FlatMap, or leverage the option sub-package's Pipe functions (e.g., Pipe3) for composable transformations, as illustrated in the quick start example with Some and None handling.

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