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: 2026-04-02 00:07:52 UTC
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https://github.com/fonCki/functional-programming

This repository hosts the "Goodies To Go (G2G)" project, an F#-based online ordering system for a canteen, demonstrating domain modeling and basic functionalities.

fsharp functional-programming

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https://github.com/codefeathers/poly

Assisted polymorphism for JavaScript

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https://github.com/powerunit/powerunit-extensions-exceptions

Objects to support checked exception in lambda

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https://github.com/ferr0s04/feup-pfl

Repository for PFL (Functional and Logical Programming) course of LEIC FEUP, for year 2024-25

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https://github.com/dopenchills/fp-vm

Vue.js application with functional programming patterns

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https://github.com/mhenderson/squarelimit

Escher's Square Limit in R with funcgeo.

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https://github.com/ryjen/emotext

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https://github.com/cryptocraigo/programming-for-kids

🚀 Explore programming with this guide for kids. Discover languages like Python and JavaScript, and start your journey in IT careers today.

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Generative or property based testing for Ruby

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An implementation of multiple dispatch for Ruby. Also known as generic-functions or multi-methods.

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Thread-safe immutable objects that provide delegation and basic validation to hashes.

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Advent of Code 2017 with ReasonML

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https://github.com/jottenlips/functionalobjc

λ Example project for using higher order functions in objective c

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An introduction to Haskell

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

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MIRROR of https://codeberg.org/catseye/Sally : A cute but naïve functional language - "upside-down Forth cake".

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Haskell implementation of tic-tac-toe game

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📦 Implemented the concept of monads in functional programming in PHP.

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MIRROR of https://codeberg.org/catseye/Deturgenchry : An OO language where `self` is a continuation (sort of)

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https://github.com/georgiifirsov/patternmatching

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C - Programming Language

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https://github.com/zoul/elm-currency-converter

Trivial currency conversion apps showcasing the Elm architecture

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https://github.com/pjiwm/functional-rust

A Rust library for functional programming, providing function composition, currying, and higher-order functions. This crate can be compiled on nightly Rust.

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https://github.com/rcardin/functional-portfolio

A toy implementation of a portfolio application that uses functional domain modeling and functional programming

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Monads Playground in TypeScript

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https://github.com/wdalmut/kata-example-3

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https://github.com/aamisyahmi/fp

Set up and develop your FP project locally with React, Node, and PostgreSQL. Use Docker for an efficient containerized environment. 🚀🖥️

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Type-safe Result and Option utilities for TypeScript, inspired by Rust. Safer error handling with a lightweight functional style.

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Learning Typelevel's Cats library

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https://github.com/iagocarmona/functional-language-algorithms

Repositório para armazenar trabalho da matéria Aspectos de Linguagens de Programação do curso Ciência da Computação utilizando linguagens funcionais e imperativas para comparar desempenhos.

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https://github.com/heitorgandolfi/elm-todo-list

Simple ToDo list application built in Elm for study purposes

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https://github.com/gabrielgiussi/scala-cats

Exercises from Scala with Cats

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https://github.com/devkiloton/java-ft

Code used in my workshop at UNICAMP university to show the benefits of the functional programming on Java, and compare imperative & declarative code.

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https://github.com/mrbrunelli/my-first-elm-app

My Fist App using Elm Lang

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https://github.com/mrbrunelli/haskell-math

My functional math studies with Haskell

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https://github.com/shahaf-f-s/multithreading

A python module for creating multithreading processes easily, in a more Pythonic way.

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https://github.com/yoyolicoris/qmul-ecs713-fp-final

My individual coursework of the module ECS713P Functional Programming, QMUL.

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https://github.com/mrbrunelli/curso-elixir

Meus estudos da Linguagem Elixir

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https://github.com/olegalexander/oa-utils

Statically typed Python utilities for functional programming.

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https://github.com/exbotanical/goldmund-sh-ii

Personal website :: Vue 3 | Go | Postgres | GraphQL

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https://github.com/palutz/scalaexercises

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

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https://github.com/inblack67/elixir-fundamentals---udemy-course

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https://github.com/minoddein/the-vigener-cipher-and-the-feistel-network

The Vigener cipher, written as part of a laboratory work

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https://github.com/fr33m0nk/functional-programming-with-fp-ts

functional programming in typescript with fp-ts

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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/bsgbryan/pug

A game engine targeted for procedural content coded in a functional style

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https://github.com/samuellucas97/haskell-exercises

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https://github.com/rolandtritsch/kotlin-aoc-2017

Porting scala-aoc-2017 to kotlin (to learn the language)

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https://github.com/adityaathalye/slideware

Where the conference talk slides are...

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https://github.com/avvessalom/itmo-functional-programming

Лабораторные работы по функциональному программированию (ИТМО, ПИиКТ-СиППО, 4 курс).

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https://github.com/mtumilowicz/scala-optics-monocle-quicklens-workshop

Introduction to Optics (Lenses, Prisms etc) in Scala.

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https://github.com/clifftech123/ts_fun_practice

Collection of small and enjoyable functional programming exercises in TypeScrip

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https://github.com/robertdp/engineering-test-api

Minimalistic API made for an engineering test

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https://github.com/francisbarton/adventofcode_2023

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https://github.com/dirtsimple/fun-factory

Fluently (and efficiently) compose PHP functions, methods, and lambda-expression strings

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https://github.com/chihaya-yuka/hackchat-haskell-bot

Hack.Chat's functional bot.

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

Rewritten React router library [functional principles].

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

Rewritten React core library [functional principles].

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https://github.com/williamlsh/js-pandora

Practical challenging cases involved with algorithm, functional programming and interviews implemented with JavaScript

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https://github.com/nikdon/15puzzle

Purely functional 15 puzzle

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https://github.com/ashr123/exceptional-functions

A collection of functions that protect against unchecked Exceptions

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https://github.com/tmartins11/progfuncional

Repositório para armazenar todos os projetos desenvolvidos na disciplina de Programação Funcional - BCC | UNIFAL.

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https://github.com/federicobruzzone/99-ocaml-problems

Implementations of the 99 problems in OCaml.

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https://github.com/vasilvelikov00/effective-ui

Composable, effect-based UI framework built on Effect.ts

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https://github.com/wilberquito/johntheartist

Template John the artist

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https://github.com/leostera/restruct

💾 Purely Functional and Compact Data Structures for ReasonML

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https://github.com/aryan02420/finite-state-machine

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https://github.com/dtsaryov/csc-haskell-fp

The repository contains lecture notes and practical task implementations from FP with Haskell course

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https://github.com/mijicd/declarative-concurrency

Talk about ZIO STM

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https://github.com/nainee99/picloom

PicLoom is a full-stack social media platform that enables users to share, discover, and organize visual content. Built with the MERN stack (MongoDB, Express.js, React, Node.js), it provides a seamless experience for users to create, curate, and engage with visual content through a modern and intuitive interface.

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https://github.com/tristanpenman/haskell-exercises

Stuff I've worked through while learning Haskell

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https://github.com/palutz/introtofunctional

Introduction to functional programming slides

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https://github.com/jcoreio/map-shape

apply mapping functions to specific properties of an object

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https://github.com/64j0/poc-cpp-functional

A POC showing how one can leverage C++ functional features to: partial application, higher order functions.

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https://github.com/erthium/primes-and-others

General tests with prime numbers

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https://github.com/gallettilance/clojure_mylib

a library of functions I built to get practice with Clojure

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https://github.com/neo-ciber94/fastlinq

LINQ for TypeScript

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https://github.com/gailo22/kotlin-arrow-practicing

Kotlin Arrow Examples

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Utilities for interoperating with Android

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https://github.com/david-lapadula/javascript-essentials

Fundamentals of JavaScript

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https://github.com/bmmunga/braincaml

An OCaml-based interpreter for the Brainf*ck esoteric programming language.

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https://github.com/khaledashrafh/petpal-simulation

The PetPal Simulation is a console-based application that simulates the experience of adopting and taking care of a pet. Users can adopt a pet, feed it, play with it, and check its status. The game tracks the pet's hunger and happiness levels, and it ends if these levels drop to critical values.

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

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https://github.com/test-bdd/test-js

A testing library for JavaScript that uses behavior-driven development and functional programming.

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https://github.com/joangq/edsl

Abordaje Funcional a los lenguajes de dominio específico embebidos - Curso de ECI 2024

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https://github.com/bcherny/mapf

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https://github.com/zyad-eltayabi/atm-system

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https://github.com/dashkite/joy

The simplicity of Lodash with the functional flair of Rambda.

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Exploring unpopular staffs of TS & JS things.

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Java implementation of Contract function

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https://github.com/bennypowers/power-functions

A wee functional library intended half for entertainment, half for personal edification.

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https://github.com/victorlga/dow25-sharpe-montecarlo

A Haskell implementation of portfolio optimization using Monte Carlo simulation to maximize the Sharpe ratio for Dow Jones stocks. This project demonstrates parallel processing in Haskell for computationally intensive financial modeling.

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