An open API service indexing awesome lists of open source software.

Functional programming

In computer science, functional programming is a programming paradigm where programs are constructed by applying and composing functions. It is a declarative programming paradigm in which function definitions are trees of expressions that map values to other values, rather than a sequence of imperative statements which update the running state of the program.

https://github.com/sophiecollard/twitter-clone

Simple Twitter clone to demo building REST and GraphQL APIs using the Scala 2.13 and the Typelevel stack as well as single-page frontend applications with Elm 0.19.

api backend cats cats-effect circe doobie elm elm-lang fp functional-programming graphql http4s rest rest-api sangria sangria-graphql scala tapir twitter typelevel

Last synced: 10 Apr 2025

https://github.com/d-plaindoux/alda

Intuitive and simple to use OCaml parsec

functional-programming parser-combinators

Last synced: 13 Aug 2025

https://github.com/jmlweb/mochila

Your Lightweight Travel Companion for TypeScript Programming

functional-programming typescript utils

Last synced: 27 Jan 2026

https://github.com/tonivade/purejson

Pure functional Json parser library

experimental functional-programming java json

Last synced: 03 Oct 2025

https://github.com/minikin/tagged

🏷️ Tagged: A Newtype Pattern, a Safe & Type-Restricted Wrapper for Dart.

dart flutter functional-programming

Last synced: 17 Mar 2025

https://github.com/thebutlah/batlcaml

BatlCaml - An OCaml AI Programming Game

artificial-intelligence functional-programming game

Last synced: 19 Sep 2025

https://github.com/facaiy/dag-lite

An experimental DAG library with functional programming technology.

dag functional-programming scala-library

Last synced: 10 Jul 2025

https://github.com/higordiego/tester-lap3d

Teste de Seleção para desenvolver Back-end

functional-programming mongodb mongoose nodejs

Last synced: 21 Aug 2025

https://github.com/theangrydev/business-flows

A combination of the Try monad and the Either monad, to help tame complex business flows

either functional-programming happy-path java-8 monad railway-oriented-programming sad-path try-catch validation

Last synced: 06 Nov 2025

https://github.com/richie-south/fp-lib

Plura: Super simple functional programming library

functional-programming npm

Last synced: 24 Oct 2025

https://github.com/davidvujic/functional-python

Exploring how to use functional concepts in Python

functional-programming python railway-oriented-programming toolz

Last synced: 04 Jan 2026

https://github.com/arthurxavierx/ebook-category-theory

Bartosz Milewski's Category Theory for Programmers as an eBook

book category-theory ebook functional-programming haskell types

Last synced: 09 May 2025

https://github.com/samirsilwal/structures

A library of data structure with extended features for each structures.

functional-programming linked-list queue stack tail-recursion

Last synced: 01 Aug 2025

https://github.com/ciavash/curry

Curry is a Raku module for currying functions plus partially applying them

curried curry currying functional-programming functions module partial partial-application raku rakulang trait

Last synced: 01 Oct 2025

https://github.com/jeffgbutler/practical-functional-java

Practical Functional Java Workshop Materials

functional-programming java

Last synced: 25 Jul 2025

https://github.com/karimaziev/fp

A collection of combinators for Elisp

combinatorics emacs emacs-lisp functional-programming

Last synced: 11 Jul 2025

https://github.com/alseinx/extensions

Some commonly used basic utilities for .NET programming.

csharp dotnet-standard functional-programming linq

Last synced: 11 Apr 2025

https://github.com/ronanyeah/rotools-js

npm package for functional utilities

async functional-programming futures

Last synced: 15 May 2026

https://github.com/uncledave/simplefunctionalextensions

Simple functional extensions for C#. Lightweight and doesn't hold your hand.

csharp functional-programming result

Last synced: 17 Aug 2025

https://github.com/ucsd-progsys/yunounderstand-data

A collection of novice interactions with the OCaml top-level.

functional-programming homework homework-problem ocaml user-study

Last synced: 12 Apr 2025

https://github.com/amarshall/boiga

Type-safe functional programming for Python

functional-programming mypy python type-safe

Last synced: 03 Aug 2025

https://github.com/crabby-lang/crabby

Crabby, the new programming language of the modern programming era.

functional-programming modern programming-language project pythonic rust

Last synced: 05 Apr 2025

https://github.com/jub0bs/iterutil

an experimental collection of utility functions (sources, combinators, sinks) for working with Go iterators

combinators functional-programming functions generics generics-in-golang go golang iterator

Last synced: 01 May 2025

https://github.com/mokeyish/pyiter

PyIter is a Python package for iterative operations inspired by the Kotlin、CSharp(linq)、TypeSrcipt and Rust . Enables strong **typing** and type inference for iterative operations.

chain-operation functional-programming linq typing

Last synced: 17 Mar 2025

https://github.com/qbixxx/lambdacalculusengine

Lambda interpreter built in Scala. Supports CbN, CbV and Free Variables calculations.

functional functional-programming lambda lambda-calculus lambda-function lambda-functions sbt scala scala3

Last synced: 07 May 2025

https://github.com/ScalaMath/VecMatLib

Open source Scala library that provides data structures for vectors and matrices

3d-graphics algebra functional-programming java linear-algebra math mathematics maths matrix-math scala vector-math

Last synced: 18 Sep 2025

https://github.com/adzz/keyword_lens

A WIP utility library for working with nested data structures

elixir fp functional-programming keyword lens lenses zipper

Last synced: 22 Aug 2025

https://github.com/bjoernloetters/noocleus-one

A minimal functional programming language with type inference, algebraic data types and pattern matching

algebraic-data-types functional-programming hindley-milner let-polymorphism pattern-matching polymorphism scala type-check type-inference type-system

Last synced: 18 Mar 2025

https://github.com/rlepigre/ocaml-timed

Timed references for imperative state

functional-programming imperative-programming references rollback

Last synced: 09 Jul 2025

https://github.com/christianparpart/compose

Functional Programming in C++14

cpp cpp11 cpp14 functional-programming library

Last synced: 29 Jun 2026

https://github.com/d-plaindoux/hpas

Functional ADT And Asynchronous stuff in Java

asynchronous functional-programming monadic-interface

Last synced: 02 Apr 2025

https://github.com/endle/ironcamel

The "most functional" imperative programming language and a toy intepreter.

functional-programming programming-language

Last synced: 23 Jun 2026

https://github.com/philihp/pcg

A functional implementation of the PCG family random number generators, written in TypeScript.

functional-programming random-generation

Last synced: 08 May 2025

https://github.com/fluture-js/callgebra

The little algebra of callbacks

algebraic-data-types callbacks functional-programming

Last synced: 10 Apr 2025

https://github.com/timfennis/apply

Functional Programming in PHP

arrow functional-programming monad php php-library php74

Last synced: 07 Mar 2026

https://github.com/mmzk1526/haskell-while-code

Implement the WHILE language introduced in the Imperial College Course Models of Computation

functional-programming haskell interpreter simulator

Last synced: 14 Dec 2025

https://github.com/francomelandri/pipeline-fp

pipeline pattern using functional programming approach

desing-patterns functional-programming noif

Last synced: 23 Aug 2025

https://github.com/masipcat/invars

Single assignment variables in Python

functional-programming python single-assignment

Last synced: 12 Apr 2025

https://github.com/danisancas/tallerscalapeum

Temario de talleres de Scala impartidos para la comunidad PEUM

functional-programming scala spanish workshop workshop-series

Last synced: 05 May 2025

https://github.com/raviqqe/stg

STG Machine in Go

functional-programming go lazy-evaluation

Last synced: 28 Mar 2025

https://github.com/ethanabrooks/dollar-lambda

An argument parsing library based on function first principles

argument-parser functional-programming parser parser-combinators python

Last synced: 11 Apr 2025

https://github.com/sandromaglione/ocaml-getting-started-advent-of-code-23

Getting started with OCaml and Functional Programming by solving puzzles from Advent of Code 23・Newsletter sandromaglione.com

advent-of-code advent-of-code-2023 advent-of-code-2023-ocaml functional-programming learn-ocaml learn-ocaml-language ocaml

Last synced: 10 Jun 2026

https://github.com/yxw007/es6_functional_programming

函数式编程学习,包含实现代码和大量实践应用demo

functional-programming js

Last synced: 08 Nov 2025

https://github.com/kioviensis/fuzion

shortcut fu⚡️ion for TypeScript

fp functional-programming javascript shortcut-fusion typescript

Last synced: 21 Jun 2025

https://github.com/xavkearney/fsharp-arm-emulator

ARM Assembly Language Emulator implemented in F#

arm emulator fsharp functional-programming

Last synced: 15 Dec 2025

https://github.com/nengo/nengo-gyrus

Recursively generate large-scale Nengo models using NumPy semantics.

functional-programming nengo neural-networks numpy python

Last synced: 18 May 2026

https://github.com/ilyasyoy/python-streamer

Simple lazy python Stream API-like wrapper.

functional-programming python stream

Last synced: 11 Jul 2025

https://github.com/kschuetz/collection-views

Low overhead, protected views over Java collections

collections functional-programming immutable java lambda non-empty set vector

Last synced: 16 Jan 2026

https://github.com/JonasMuehlmann/optional.go

optional.go is a simple and generic wrapper around a value and a presence flag inspired by C++'s std::optional

functional functional-programming go golang optional optional-type

Last synced: 07 May 2025

https://github.com/kevin-lee/just-fp

A small functional programming library

fp functional-programming scala

Last synced: 13 Apr 2025

https://github.com/denismurphy/pythonic

Selection of naive code snippets and examples that I compiled while learning Python.

beginner collections functional-programming oop python typing zen

Last synced: 09 Feb 2026

https://github.com/huntie/stringutils

A functional string utility library for Python

case-conversion functional-programming functional-python string-utilities

Last synced: 06 May 2025

https://github.com/markomanninen/calchylus

Lambda Calculus with Hy - Docs: http://calchylus.readthedocs.io/

functional-programming hy lambda-calculus lisp logic-programming python

Last synced: 11 Jul 2025

https://github.com/mthaler/order-taking

Order taking example from the book "Domain Modeling Made Functional" converted to Kotlin

arrow arrow-kt ddd ddd-example ddd-sample domain-driven-design domain-modeling functional-programming kotlin

Last synced: 23 Jul 2025

https://github.com/stewsquared/pe-speedrun

2020 Project Euler 1-100 Speedrun in Scala #ProjectEuler100

functional-programming math projecteuler100 scala speedrun

Last synced: 11 Jul 2025

https://github.com/jderochervlk/fp-ts-remote-data

https://jderochervlk.github.io/fp-ts-remote-data/

fp fp-ts functional-programming remote-data typescript

Last synced: 13 Aug 2025

https://github.com/mrdimosthenis/scala-synapses

A plug-and play library for neural networks written in Scala 3

deep-learning dotty functional-programming machine-learning neural-network scala

Last synced: 10 Apr 2025

https://github.com/jakxz/functional-or

functional OR in js

functional-programming javascript or

Last synced: 20 Mar 2025

https://github.com/thgs/functional

(experimental) Trying to express some functional concepts in PHP

experimental functional-programming php

Last synced: 13 Dec 2025

https://github.com/vickumar1981/functional_python

Functional Programming in Python: PyCon 2022 Jupyter notebook

functional-programming jupyter-notebook pycon2022

Last synced: 11 Aug 2025

https://github.com/italomaia/lua_fun

Functional programming library for lua lang.

functional-programming lua lua53

Last synced: 11 Aug 2025

https://github.com/samyam81/anonymous-functions

A lambda expression in Java is a concise way to define an anonymous function that can be used as a method parameter or assigned to a variable.

cpp csharp functional-programming java

Last synced: 11 May 2026

https://github.com/causaly/array-fp-utils

Array utilities for functional programming in TypeScript.

array fp fp-ts functional-programming typescript

Last synced: 19 Jun 2025

https://github.com/flintinatux/squirrel

A nimble functional library for Lua.

compose curry functional-programming lua

Last synced: 20 Mar 2025

https://github.com/rubenjgarcia/commons-functional

A collection of Functional helpers for Java 8

functional functional-programming java-8 tuples

Last synced: 26 May 2026

https://github.com/crowdhailer/eyg

Explicit concurrency for intelligible parallel programing.

actors causality consistency dependent-types functional-programming immutability language

Last synced: 03 Feb 2026

https://github.com/TheAlexLichter/advent-of-code

My solutions for the Advent of Code (since 2k17)

advent-of-code advent-of-code-2017 functional-programming javascript

Last synced: 08 Aug 2025

https://github.com/unional/async-fp

Asynchronous Functional Programming Utilities

async context dependency fp functional functional-programming promise typescript

Last synced: 06 Mar 2026

https://github.com/sourceduty/signal_wave

A mathematical framework that models complex oscillatory behavior by combining multiple oscillators in a structured manner.

function functional-programming functionality math math-library math-model mathematical-modelling mathematics maths oscillatory oscillatory-process pypi python sourceduty

Last synced: 08 Aug 2025

https://github.com/kutyel/kutyel-hakyll

New personal website with Hakyll!

functional-programming hakyll-site haskell nix

Last synced: 15 Apr 2025

https://github.com/js-factory/ironhead

Functional and Declarative NodeJS Framework.

configurable express functional-programming javascript nodejs routing

Last synced: 08 May 2025