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Show HN: Common FP – A New JavaScript Utility Lib

https://common-fp.org
1•waphil•5h ago
## Who is this for?

1) Devs looking for utilities that treat data types generically. For example, `mapValues` takes an array, object, Map or Set and returns a new instance.

2) Devs interested in functional utilities without the jargon. Utilities are named in plain English, there's no currying, and its source is kept simple.

## Other features

- An in-browser playground: https://common-fp.org/try-it

- Supports TypeScript

- 100% test coverage with types tested as well.

- For every utility, I try to explain why it's useful along with a code example.

## A personal note

- I built this as a personal endeavor. I wasn't trying to solve a problem the community expressed, so I understand if people find it odd or unnecessary. Finishing a project is difficult, and I'm mostly happy just to have done that and present what I consider to be a polished product.

## Link to source

- https://github.com/common-fp/common-fp/tree/dev/pkg/common-f...

Thanks for taking a look. ~Phil

* This is a repost since the first time was over a US holiday. Original post here: https://news.ycombinator.com/item?id=45084163

At 20, Techmeme news aggregator has never been hotter

https://crazystupidtech.com/2025/09/08/at-20-techmeme-has-never-been-hotter/
1•Terretta•30s ago•0 comments

Dyson Unveiled Global Premiere [video]

https://www.youtube.com/watch?v=w9xTE2EuAt8
1•tosh•31s ago•0 comments

Spinal Tap Is Back

https://text.npr.org/nx-s1-5527051
1•mooreds•1m ago•0 comments

Silo – Private AI on your phone

https://apps.apple.com/us/app/silo-private-ai/id6749483886
1•PratyushRT•1m ago•1 comments

Deep Copy

https://developer.mozilla.org/en-US/docs/Glossary/Deep_copy
1•aanthonymax•2m ago•0 comments

The UAE Releases a Tiny but Powerful AI Model

https://www.wired.com/story/uae-releases-a-tiny-but-powerful-reasoning-model/
2•ls-a•6m ago•0 comments

Three big things we still don't know about AI's energy burden

https://www.technologyreview.com/2025/09/09/1123408/three-big-things-we-still-dont-know-about-ais...
1•rbanffy•7m ago•0 comments

Teen coder made first millennial Catholic saint at youthful Vatican event

https://www.reuters.com/world/teen-coder-made-first-millennial-catholic-saint-youthful-vatican-ev...
1•rmason•7m ago•0 comments

Please Ignore

https://www.google.com/search?q=iphone+17+pro+memory
1•ankushio•10m ago•1 comments

WaterDrop Meets Ruby's Async Ecosystem: Lightweight Concurrency Done Right

https://mensfeld.pl/2025/09/ruby-async-waterdrop-concurrency/
1•riffraff•11m ago•0 comments

Sorry, We Deprecated Your Friend

https://blog.j11y.io/2025-08-30_openai_gpt5_reckless/
1•padolsey•13m ago•0 comments

Analysis of Software-Based Restoration Techniques for Navtex Message

https://www.mdpi.com/2077-1312/13/9/1657
1•PaulHoule•15m ago•0 comments

Opencode Is Moving to Opentui

https://twitter.com/thdxr/status/1965476829701267826
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https://hothardware.com/news/amd-zen-6-tsmc-2nm-3nm-rumor
1•rbanffy•16m ago•0 comments

Ask HN: Would you pay to gain the ability to create forecasting models?

1•juanviera23•16m ago•0 comments

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https://platforms.substack.com/p/figma-the-untold-story
1•manveerc•18m ago•0 comments

Show HN: Superagents – connect spreadsheets to any database, API or MCP server

https://sourcetable.com/superagents
5•mceoin•18m ago•1 comments

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https://frontendatscale.com/blog/tanstack-db/
1•samwillis•21m ago•0 comments

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https://www.youtube.com/watch?v=M0au92yebLQ
2•HelloUsername•22m ago•0 comments

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https://www.theregister.com/2025/09/09/microsoft_return_to_work/
10•rntn•23m ago•2 comments

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https://excamera.substack.com/p/a-box-forming-mandrel
1•jamesbowman•26m ago•0 comments

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https://www.justiceformyanmar.org/stories/silk-road-of-surveillance
1•0xggus•26m ago•0 comments

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https://ninkovic.dev/blog/2025/prompt-snapshot-testing
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https://www.aiengineering.report/p/devs-cancel-claude-code-en-masse
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https://www.amnesty.org/en/documents/asa33/0206/2025/en/
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Visual Studio 2026 Insiders

https://visualstudio.microsoft.com/insiders/
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https://interseclab.org/research/the-internet-coup/
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3•oavioklein•27m ago•0 comments

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https://rishabhegde.substack.com/p/ninety-percent-done
1•vertoc•28m ago•0 comments