typelevel / typelevel/cats-effect
Add FAQ entry about IO missing `withFilter`
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Description
Errors like error: value withFilter is not a member of cats.effect.IO are very confusing for newcomers
Add a FAQ entry which:
- explains what the error means (why it happened)
- why IO doesn't have the method (tldr: unsound. Link to the discussion ticket)
- what to do about it (2-line tuple workaround or bm4)
Contributor guide
First steps
- Read the whole issue, then the project's contributing guide.
- Comment on the issue to say you are picking it up — it saves two people doing the same work.
- Fork the repository and make your change on a branch.
- Open a pull request that references the issue number.
Research direction
Locate the project's FAQ documentation and use the reported cats.effect.IO withFilter error as the entry point. Add the requested explanation, discussion-ticket link, and two-line tuple or bm4 workarounds; done means the FAQ covers why the error occurs, why IO lacks the method, and what newcomers should do.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- scala
- Domain
- documentation
- Issue type
- Documentation
- Difficulty
- 2/5
- Estimated time
- 1-3 hours
- Activity status
- Stale
- Clarity
- Mostly clear
- Newbie friendliness
- 55/100