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: 2026-07-10 00:12:02 UTC
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https://github.com/leolanese/practical_functional_programming

Practical Functional Programming

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https://github.com/nullobject/memory

A game of memory.

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https://github.com/antononcube/raku-llm-functions

Raku package for functions and function objects to access, interact, and utilize LLMs.

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https://github.com/malinatrash/funky

Powerful library for functional programming in Go with modern generics.

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https://github.com/dominicluidold/ws21-conceptshigherprogramminglanguages

A collection of mandatory exercises in "Concepts of Higher Programming Languages" - 1st semester master @ Vorarlberg University of Applied Sciences (FHV)

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https://github.com/saksmt/f

Provides some useful (especially for method references) functional methods for Java 8

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https://github.com/offensiveedge/colors-le

Instantly extract and analyze colors from CSS, HTML, and JavaScript with precision

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https://github.com/callius/target-kt

Target - Functional domain modeling in Kotlin

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https://github.com/megabytesofrem/learn-haskell

Personal notes/repo to learn Haskell. 3rd time is the charm

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🌈 My haskell practice

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https://github.com/zhb2000/maybe-extension

Functional interfaces and useful extension methods for "Maybe types" in C++ (e.g., std::optional, pointers, and smart pointers).

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https://github.com/ouerghi01/elixir-99-functional-mastery

A personal journey to master functional programming by solving the classic L-99 problems. No tutorials, no videos—just pure problem-solving and learning.

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A set of koans for diving into the world of functional programming in Javascript

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My solutions for the Haskell MOOC course by the University of Helsinki.

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Find out the value of the cryptocurrency you want

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https://github.com/sachdevavaibhav/js-fundamentals

JavaScript Fundamentals (Notes) ft. Namaste JavaScript

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https://github.com/mikla/fpinscala

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📊 RxJS operators for reactive statistics

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https://github.com/bredalis/jsfunctionalprogramming

✨ Functional programming in js ✨

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https://github.com/alansastre/java-functional-advanced

Programación funcional en Java. Procesamiento de datos con la API Stream en Java. Interfaz funcional Comparator.

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https://github.com/rodrigoalvesvieira/if686

Documents, assignments and code from the Computational Languages Paradigms course at CIn/UFPE, in the semester of 2015.1.

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https://github.com/rxtoolkit/fs

💾 RxJS utilities for working with files and file streams locally

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https://github.com/darky/klubok

Do notation pipes for Promise-based or pure functions which easy to mock

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https://github.com/el3um4s/match

Alternative to JavaScript’s switch statement with a functional twist

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https://github.com/gallettilance/frp-counters

Functional Reactive Programming with BaconJS 🥓

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https://github.com/noyzys/fp-practice

* Basic functional programming concepts

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https://github.com/zoomoid/pymocklib

A PYthON 3.10 lib thaT will MAkE you APpEAR WEaK ANd BUTT-HUrT on THe inTeRNET

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Gentle introduction to functional programming in Java.

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https://github.com/fuyulang/fuyu

The Fuyu programming language

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https://github.com/a1exwang/adonis-lang

A functional programming language with built in NVM support

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a system that helps formally verify the correctness of concurrent programs, integrated into a toy programming language called Imp.

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🔌 RxJS operators for working with WebSockets

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https://github.com/manojpawar94/go-lang-fundamental-examples

The repository has the programs on the fundamental concept of the Go Language programming. It covers variable declaration, conditional block, loop, functions, a data structure(array and slice), goroutines, struct, pointers, error handling and file handling.

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NextJs application where you can search and view a list of users, implemented with pagination

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🐍 Typed pipes

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https://github.com/kristofkruller/algorythms-js

Note and examples for algorythms and optimalization in Javascript

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partial function application

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https://github.com/nowayhecodes/iters

Functional iterators, good to Go.

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https://github.com/aartaka/lamber

A functional scripting language compiling to pure Lambda Calculus

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🧮 validation methods of propositional logic

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An environment for accelerated learning of Haskell.

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Programación funcional y API Optional en Java

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https://github.com/tonivade/commitconf-25

código fuente de los ejemplos usados en la charla que presenté en la #commitconf

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https://github.com/vitorluizc/functional-resources

Some pure-functions to deal with everything.

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https://github.com/rxtoolkit/s3

🪣 RXJS operators for working with AWS S3

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https://github.com/fabasoad/setup-cloe-action

This GitHub action installs Cloe

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https://github.com/eckelon/functional-api-example

Safe way of starting an express server. It'll start only when express and pino dependencies are satisfied

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https://github.com/darrmirr/fp_cor

Chain of Responsibility implementation at functional way

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https://github.com/adhityaramadhanus/gope

gope (go efpe), functional programming helper in go (for learning purpose)

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함수형 프로그래밍 연습

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https://github.com/valtermro/tolb

A light and fast set of javascript utility functions

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https://github.com/asarkar/99-haskell

H-99: Ninety-Nine Haskell Problems

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https://github.com/vandalkvist/lazy-sequence

JS function which executes functions passed by arguments in sequence somewhen you want it.

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https://github.com/yurkimus/curry

Javascript curry utility

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https://github.com/bencode/code

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Learn Elixir with test-driven development

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https://github.com/zoedsoupe/functional_programming_basics

Repositório que abriga meus estudos pessoais em programação funcional, com foco em Haskell

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https://github.com/iacobson/blog_functors

Support code for blog article Functor Flavoured Pipes with Elixir

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https://github.com/earldouglas/teep

Functional programming in JavaScript

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https://github.com/henriquecbuss/ipe-compiler

A compiler for the Ipe language, as an Elm package

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https://github.com/mattlianje/enigma

CLI Tool ... A pure FP, M3 Enigma machine as used by the Germans from 1934-45.

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https://github.com/mmzk1526/haskell-tfl-status

A simple TfL tube status checker

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https://github.com/lightness/transducer-101

Some things about transducers

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https://github.com/mbivert/nix-series-code

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https://github.com/dhodgson615/lintomatic

A basic linter for Python projects written in Haskell

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https://github.com/samedfft2634/url_shortener

For shorter url, you can use this application. For fast and easy results...

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https://github.com/uchamod/flutter_fitness_tracker_application_ui

Welcome to the Fitness Tracker app! This Flutter application is designed to help you keep track of your fitness activities with a creative and intuitive user interface. The app is fully responsive and works seamlessly on mobile, web, and tablet devices, ensuring you have access to your fitness data anytime, anywhere.

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https://github.com/ibnz36/minifunc

An extremely simple, small & type-safe functional programming library for TypeScript/JavaScript.

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https://github.com/armcn/fp

Almost Practical Functional Programming in R

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https://github.com/voidwyrm-2/ana

A functional pseudo-array scripting language

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https://github.com/muhammadhassanraza25/budget-app

I added some amazing features in this Budget App like Show Total Budget, Show Expenses & Show Balance Budget. This Budget App also shows items in list and delete items from list.

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https://github.com/pfpack/pfpack-primitives

PrimeFuncPack Primitives is a core library for .NET consisting of useful extensions and predicates making work with functional pipelines, Linq, strings, the nullable feature, etc. easier.

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https://github.com/sanwed/nonograms

Популярная игра Нонограмы с возможностью добавления уровней

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https://github.com/pisces/functionalswiftkit

This kit help you can write code as functional programming.

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https://github.com/otobrglez/beyond-ruby

The code from my talk about going beyond Ruby into Scala and beyond.

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https://github.com/ismailarilik/fp-presentation-examples

Functional Programming Presentation Examples

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https://github.com/mgrinshpon/toolz-stubs

Type stubs for toolz and tlz.

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https://github.com/delonnewman/atomjs

Clojure Atoms for Javascript. Shared, synchronous, independent state. A fork of https://github.com/cjohansen/js-atom.

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https://github.com/alkiory/video-chat

This project is crafted with the latest technologies, including React for a dynamic and interactive front end, TypeScript for type-safe code, WebRTC for peer-to-peer video communication, Socket.io for real-time WebSocket connections, and Node.js powering the backend.

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https://github.com/joelburget/hazel

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https://github.com/jaalonso/examenes_de_pf_con_haskell_vol6

Exámenes de programación funcional con Haskell. Vol. 6 (Curso 2014-15)

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https://github.com/pmuens/fp

Doing some Functional Programming with Scala

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https://github.com/nem035/js-function-fun-2

Fun with functional programming in JavaScript (2)

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Derive macros for optics traits defined in photonix.

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https://github.com/barbaracalderon/coffee-machine-project

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https://github.com/modemobpsycho/python-course-s1-2

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