Question 1

How do I use futil-js lenses with React hooks?

Accepted Answer

Pass React's useState array pair directly to lens functions, or use domLens.value for input binding, as shown in the README example where domLens.value(state) returns {value, onChange} props for two-way binding.

Question 2

What's the benefit of flowAsync over using async/await directly?

Accepted Answer

flowAsync allows composing multiple async and sync functions in a pipeline, automatically resolving promises in arrays and objects, which simplifies complex workflows compared to manual await chains or Promise.all wrappers.

Question 3

Futil-js vs Ramda: which is better for functional programming?

Accepted Answer

Futil-js extends lodash/fp, so it's ideal if you're already using lodash and need async utilities or lenses; Ramda is more pure and immutable, but futil-js offers practical enhancements like mutable variants and aspect-oriented programming.

Question 4

How can I handle errors in async functions with futil-js?

Accepted Answer

Use the aspect utility with onError to wrap functions for error handling, or tapError to rethrow errors after processing, providing a functional way to manage exceptions without breaking pipelines.

Question 5

Is futil-js compatible with TypeScript?

Accepted Answer

The library is written in JavaScript, and while it may work with TypeScript, there are no official type definitions included, so you might need to add them manually or rely on community contributions for full type safety.

Question 6

How do I flatten a nested object using futil-js?

Accepted Answer

Use flattenObject to convert nested keys to dot notation paths, or for more complex structures, use flattenTree with a custom traversal function to create a flat representation based on node properties.

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