typelevel/cats
View on GitHubLightweight, modular, and extensible library for functional programming.
- Stars
- 5.5k
- Forks
- 1.2k
- Open beginner issues
- 0
- Indexed issues
- 224
- Avg merge
- 2d 10h
- Merged PRs (30d)
- 5
- Dominant language
- Scala
- License
- No license data
- Last GitHub push
- Sep 15, 2026
- Latest indexed
- Sep 19, 2026
- Contributing guide
- Contributing guide
- Code of conduct
- Code of conduct
- Beginner labels
- help wanted good first issue
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good first issue
typelevel/cats#4831 · 6 comments · 1 reaction · 1 assignee ·
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Difficulty 5/5 Over a week Newbie friendliness 35/100
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Difficulty 3/5 1-2 days Newbie friendliness 45/100
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Difficulty 4/5 3-5 days Newbie friendliness 35/100
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Difficulty 4/5 3-5 days Newbie friendliness 30/100
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Difficulty 4/5 3-5 days Newbie friendliness 35/100
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Difficulty 4/5 3-5 days Newbie friendliness 42/100
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Difficulty 4/5 3-5 days Newbie friendliness 35/100
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algebra.ring.Semiring conflicts with Wikipedia Semiring definition in that it lacks a `one` element Open
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testing
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behind-the-scenes Source Breaking
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`Eval` thread safety Open
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.splitWhen Open
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Difficulty 4/5 3-5 days Newbie friendliness 35/100
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Difficulty 5/5 Over a week Newbie friendliness 25/100
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Difficulty 1/5 Under an hour Newbie friendliness 72/100
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Difficulty 4/5 3-5 days Newbie friendliness 35/100
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typelevel/cats#4444 · 8 comments · 1 reaction · 1 assignee ·
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Difficulty 5/5 Over a week Newbie friendliness 35/100
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documentation
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Difficulty 5/5 Over a week Newbie friendliness 35/100
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Difficulty 3/5 1-2 days Newbie friendliness 35/100
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Difficulty 4/5 3-5 days Newbie friendliness 30/100
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Difficulty 4/5 3-5 days Newbie friendliness 35/100