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.

GitHub: https://github.com/topics/functional-programming
Wikipedia: https://en.wikipedia.org/wiki/Functional_programming
Related Topics: oop, declarative-programming, procedural-programming, event-driven-programming,
Last updated: 2026-07-08 00:12:18 UTC
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https://github.com/gregros/z.ahk

Obsolete utility library for AHKv2

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https://github.com/genropy/smartswitch

Intelligent rule-based function dispatch for Python

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https://github.com/rurumimic/lisp

List Processor

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https://github.com/emilydaykin/gifter

🎁 A full-stack, tested & responsive e-commerce site to browse and buy gifts for any occasion

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https://github.com/pavelannin/monadic-kotlin

Monadic is a distributed multiplatform Kotlin framework that provides a way to write code from functional programming

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https://github.com/aditya-k93/fpinscala

Functional programming in Scala

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https://github.com/iain-s/wizards-within

Working through SICP, one chapter at a time.

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https://github.com/nesalia-inc/core

Zero-dependency monads for bulletproof TypeScript applications

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https://github.com/blackwakhu/introduction-to-functional-programming

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It's the Windows calculator made with pure HTML, CSS and JavaScript. I tried to apply some functional programming concepts.

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https://github.com/SanTiepi/benoit

Benoît — A programming language where functions are algebra and modules are messages between machines.. Built for human-AI collaboration.

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https://github.com/mqtth3w/paradigmilinguaggianalisidati-unipr

Paradigms and languages for data analysis (Haskell, Python, Rust). 2024.

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Clojure's transducers in Scala.

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https://github.com/dominicegginton/functional-reader

A purely functional, dependency-free dependency injection library for TypeScript based on the Reader Monad.

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Notes, code and worksheets from scala-exercises training (scala-exercises.org)

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My attempts for the Programming Languages Lab (CS 431 Course) Assignments at IITG

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A lighweight programming language mixing JSON and functional features together

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https://github.com/slava0135/stg-example

Example Haskell program translated to STG and compiled to C

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A collection of modular libraries tailor-made for Kotlin enthusiasts.

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https://github.com/wanjinyoo/csc330

Functional programming

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https://github.com/martianoff/rules-gala

Bazel rules, a bzlmod extension, and a gazelle plugin for building, testing, and transpiling the GALA language — plus a Bazel module registry that publishes rules_gala.

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https://github.com/anicolaspp/nsource

A composable library for collections

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https://github.com/oelin/hyper-reducer

A generalization of reduce() to arbitrary arity.

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Hakyll site for danieljharvey.github.io about mostly Haskell shit at the moment.

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Compute Levenshtein distance using dynamic programming in Elm

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https://github.com/rackspace/maybe-result

Safe handling of null and undefined in Typescript and Javascript

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https://github.com/kamranikramofficial/portfolio

A clean and responsive personal portfolio website built using HTML, CSS, and JavaScript. It showcases my skills, projects, education, and contact information.

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https://github.com/martianoff/gala-acp

Transport-neutral Agent Communication Protocol for GALA: content-hash message identity, idempotent dedup, a delivery/liveness FSM, and a generic agent-run contract — with a Claude backend.

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some haskell-wannabe functions in JS (typescript)

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https://github.com/jyothsnasrinivas/eta-android-interop

Utilities for interoperating with Android

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https://github.com/codeconscious/unique-file-generator-fsharp

Create an arbitrary number of random, unique (by name and content) files.

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https://github.com/recursivelogic/haskell-bot

Haskell Discord bot for the FP Discord server

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https://github.com/ahlusar1989/spark2sfoverflow

StackOverFlow K-Means Analysis

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https://github.com/sash-ua/gen_drift_monad-ts_a4

The simple web application Modeling Genetic drift. Used: Angular4 + Angust+ TypeScript, Angular material, Rollup, D3, HammerJS, SCSS, Gulp, HTML5, CSS3.

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https://github.com/joebobmiles/joebobmiles

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https://github.com/imrafaelmerino/vertx-mongo-effect

Vertx-MongoDB-Effect enables interaction with MongoDB in a purely functional and reactive style, seamlessly integrating with Vertx-effect. This library requires familiarity with Vertx-effect, as both frameworks share a foundational reliance on immutability and persistent data structures provided by json-values.

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https://github.com/rtorr/ts-fp

Typescript, eslint-plugin-fp, and vscode example

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https://github.com/ethern-myth/javascript

OOP, Arrays and Objects and more

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https://github.com/al-ghaly/ruleengineusingscala

A Rule-Based discount calculating engine for a retail store. The engine reads transaction data, applies various discount rules based on the product, date, and other criteria, and writes the results back to a database.

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https://github.com/nshkrdotcom/gemini_cli_sdk

An Elixir SDK for the Gemini CLI — Build AI-powered applications with Google Gemini via a robust, idiomatic wrapper around the Gemini CLI. Features streaming, structured output, session management, model selection, and OTP supervision tree integration for production-grade Gemini-powered Elixir apps.

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https://github.com/tricinel/cuddy

An aggregation pipeline built in a functional programming style that lets you search, group, order and transform a collection.

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https://github.com/ardywsptr/phpdasar

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https://github.com/running-grass/grass-js

自用的js库

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https://github.com/lechindianer/fp-talk

Intro talk on functional programming

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https://github.com/stuartdaniells/portfolio-website

React

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https://github.com/arodriguezfontana/functional-programming-unq

Prácticas realizadas para Programación Funcional de la UNQ.

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https://github.com/armadacore/essentials

TypeScript essentials for explicit error and absence handling - Option, Result, typed Exceptions and optional Callbacks the compiler actually enforces.

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https://github.com/lpld/real-world-haskell

Assignments from the book "Real World Haskell" (http://book.realworldhaskell.org/)

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https://github.com/ethern-myth/spring-postgres

Java SpringBoot PostgreSQL RestAPI

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https://github.com/ildella/pipelean

A pragmatic library for sequential async operations with first-class error handling.

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https://github.com/sseffa/functional-programming

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https://github.com/azuobs/naive-workflow-manager

Naive-workflow-manager microservice with akka-http and akka-actors

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https://github.com/roxtra1/citytowers

Проект для тестового задания

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https://github.com/aayushyadavz/todo-app-react

Built a ToDo App using React JS.

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https://github.com/rbaltrusch/stream.lua

A lazy iterator-chaining library for Lua similar to the Java Stream API

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https://github.com/carlosvinimsouza/projeto-livro-python

Primeiro trabalho de extensão com Python

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https://github.com/rjdestigter/lazy-reducers-example

An example of using the IO Monad to lazily inject reducers into the Redux store

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https://github.com/dragos-tudor/frontend-rendering

Rewritten React core library [functional principles].

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https://github.com/agapas/react-carousel

Image carousel made with React and TypeScript

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https://github.com/alex-aralis/yank-down

Yank a curried parameter down to be the first argument passed.

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https://github.com/brunomontezano/r-workshop-intermediario

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https://github.com/f-z/functional_programming

Haskell, Erlang, Reactive functional programming

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https://github.com/dboyliao/learnhaskell

Notes and codes for learning Haskell.

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https://github.com/uriegel/uwebserver

A web server based on F# and .NET Core

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https://github.com/lichaojacobs/my_util_lib

工作中总结的公共类库、小工具，用来提高工作效率以及代码整洁度

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https://github.com/meragix/calx

⏱️ A lightweight, immutable, and fully tree-shakeable date manipulation library for Dart & Flutter. Functional-first core with zero-allocation opt-in extensions.

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https://github.com/kiquetal/fsharp-workout

Hands-on F# training — 6 hyperfocus sessions covering type-driven design, pipelines, pattern matching, domain modeling, async, and integration

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https://github.com/asarkar/hackerrank-fp-haskell

Functional Programming code challenges on HackerRank

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https://github.com/yonatan-reicher/functionality

Rust |> functional programing = 💖

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https://github.com/sorja/haskell-2018-ifp

Introduction to Functional Programming (Haskell). Repository for University of Helsinki course TKT21014.

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https://github.com/saber2pr/fp

:heavy_minus_sign: A library for Javascript in functional programing in async | sync | lazy.

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https://github.com/guiromao/some-functional-programming-java

Some functional programming (main Java interfaces for such)

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https://github.com/deepcloudlabs/dcl235-2022-aug-09

DCL-235: Effective Java Programming

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Wang Tiles generator in Ocaml

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https://github.com/marinaa13/pairing-heaps-racket

Functional implementation of pairing heaps and their applications in Racket, including sorting, movie ranking, and stream-based median computation, using recursion, higher-order functions, and pure functional design

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https://github.com/jccampagne/stuff

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https://github.com/dictybase-docker/crusher

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