Fp-filters – A curated collection of TS/JS array filter functions
Hello HN, I wanted to share a library I've been working on called: fp-filters - A curated collection of 130+ common-use filter functions that are written (and can be used) in a functional programming style. Why I built this: I have noticed in several codebases the tendency to keep writing the same or similar filter functions over and over again. Often inlined, taxing readability. And realized that most of them do pretty much the same N things. Therefore they could be isolated, curated, and maintained separately. fp-filters provides 130+ composable, point-free filtering functions that make…
Fp-filters – A curated collection of TS/JS array filter functions launched on April 17, 2025 with 11 votes, #2,830 of 7,818 launches that month and more than 75% of that year's launches. The site was not reachable when checked in September 2026.
In plain words
fp-filters is a TypeScript/JavaScript library containing over 130 reusable filter functions designed for functional programming. It addresses the problem of filter logic being repeatedly written inline across codebases by providing composable, point-free predicates that can be combined and chained. The library targets developers who want more readable and maintainable data transformation pipelines. Functions are pure with no side effects and work as both predicates and filters.
written from the facts on this page · September 2026
From the sources
In the maker’s words, at launch
Hello HN, I wanted to share a library I've been working on called: fp-filters - A curated collection of 130+ common-use filter functions that are written (and can be used) in a functional programming style. Why I built this: I have noticed in several codebases the tendency to keep writing the same or similar filter…
Does a similar job
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fp-filters (JavaScript / TypeScript)Dec 2025 · github.com · ▲1A curated list of JS/TS ready-to-use array filters
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