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IBM/fp-go

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Functional programming library for Go 1.24+, inspired by fp-ts. Uses generic type aliases for a clean, composable API. Provides Option, Either, Result, IO, IOResult, Reader, and ReaderIOResult monads, plus optics (Lens, Prism, Traversal) for immutable data manipulation. Supports Functor, Applicative, and Monad abstractions with do-notation-style

9 mentions on Hacker News by 8 people: 2 stories, 7 comments · first 2023-08-18 · latest 2026-03-13

Mentions per year 9 mentions · busiest year 2023 (7)
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  1. …Rust-like language in the future and bridge the gap between the two languages. [1] - https://github.com/IBM/fp-go
    comment by SleekoNiko · 2024-11-08 · in Functional Programming in Go
  2. …training to become productive. Here's an example of functional programming within Go taken far: https://github.com/IBM/fp-go/blob/main/samples/http/http_tes... . It basically adds a DSL on top of Go, which goes against its principles of…
    comment by Cthulhu_ · 2023-09-20 · in Fixing for loops in Go 1.22
  3. There exist at least some examples as part of the go docs, e.g. here https://pkg.go.dev/github.com/IBM/fp-go/either#pkg-examples or https://pkg.go.dev/github.com/IBM/fp-go@v1.0.19/array#pkg-ex... but there certainly could be more. Are…
    comment by cleue · 2023-08-22 · in FP-Go: Functional programming library for Golang
  4. it has no error handling. also look at the API, what a joke: https://godocs.io/github.com/IBM/fp-go/function and check out the "constants": https://godocs.io/github.com/IBM/fp-go/function#pkg-variable...
    comment by 38 · 2023-08-18 · in FP-Go: Functional programming library for Golang
  5. …CatFact]]("Log Result: %v")), ) result := data(context.Background()) fmt.Println(result()) https://github.com/IBM/fp-go/blob/main/samples/http/http_tes...
    comment by 38 · 2023-08-18 · in FP-Go: Functional programming library for Golang
  6. …A7, A8, A9, A10]) ReaderIOEither[T.Tuple10[T1, T2, T3, T4, T5, T6, T7, T8, T9, T10]] ( https://pkg.go.dev/github.com/IBM/fp-go/context/readerioeith... )
    comment by Spiwux · 2023-08-18 · in FP-Go: Functional programming library for Golang
  7. True, however the README does link to this: https://github.com/IBM/fp-go/tree/main/samples
    comment by dveeden2 · 2023-08-18 · in FP-Go: Functional programming library for Golang