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: 2026-07-02 00:11:57 UTC
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https://github.com/ayrtonbsouza/elixir-fundamentals-list-length-challenge

This is an application developed as a challenge for Elixir Ignite Bootcamp, proposed by RocketSeat.

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https://github.com/carlosrberto/lazy-list

LazyList implements map, filter and reduce in JavaScript Arrays with lazy evaluation.

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https://github.com/rabestro/dicechess-engine-scala

High-performance parallelized Expectimax game engine and probability calculator for Dice Chess, written in Scala 3.

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https://github.com/top-submissions/foundations-calculator

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https://github.com/wojwozniak/functional-programming-course

[uni] Functional Programming Course

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https://github.com/b-gran/promise-plumbing

Functional, Promise-based control flow primitives inspired by async

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https://github.com/wislertt/functional-programming-with-python

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https://github.com/junaidzm13/sigma-calculus-interpreter

A sigma calculus based interpreter implemented using Haskell and related underlying programming concepts.

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

My solutions for Advent of Code starting from 2015

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https://github.com/jin-sungdae/javastream

Functional Programming in Java && Stream

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https://github.com/davidgfolch/shop

Customer & order management

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https://github.com/afsalthaj/fp-generator

The library that solves all your data generation problem !

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https://github.com/jakubgrobelny/databases-project

final project for databases course

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https://github.com/unacorbatanegra/tie_fp

FP opinionated in Flutter & Dart

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https://github.com/yuan-kuan/zasa

Offline web application to keep track of household food stock. Demo project for fp-svelte

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https://github.com/y2k2mt/grouping-n

A tiny API: Just shuffles the given names.

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https://github.com/brunonavarrooficial/crud-localstorage-js

LocalStorage CRUD

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https://github.com/a248/jdbcaesar

Conquer the verbosity of plain JDBC.

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https://github.com/davidmarne/functional_flutter

Tools for composing flutter widget trees in a functional manner.

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https://github.com/zkfmapf123/go-js-utils

Using js method in golang

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https://github.com/palutz/functionalscala_coursera

Functional programming in Scala Certification path (EPFL)

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https://github.com/customcommander/functionaut

General purpose library for the functional programming hobbyist.

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https://github.com/0xspringtime/catsys

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https://github.com/wahyukmr/javascript-programming

Repository ini adalah sumber daya yang lengkap dan mendalam untuk mempelajari JavaScript dari tingkat pemula hingga tingkat lanjutan. Panduan yang mencakup semua aspek fundamental JavaScript serta konsep yang lebih kompleks.

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https://github.com/zhibirc/dev-random

:notes: notes/code/thoughts

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https://github.com/kshirish/reactivexio

Learning functional programming concepts from `http://reactivex.io/learnrx/`

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https://github.com/alejogs4/church-encoding-javascript

Church encoding to represent typical programming structures on Javascript

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https://github.com/abengl/ntt-project2-customerms

This microservice is part of the second project deliverable for the NTT Data Tech Girls program. It provides a CRUD API for managing customer banking management.

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https://github.com/thma/clean-architecture-with-functions

Clean Architecture in Haskell. Using higher order functions for 'dependency injection'

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https://github.com/sword-smith/hfasto

Implementing a compiler for the fuctional programming language fasto in Haskell

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https://github.com/mollybeach/apetalie

Apetalie Javscript Web3 Application Function Methods Solidity

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https://github.com/bredalis/functionalprogrammingpython

💻 Programación Funcional en Python

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https://github.com/aganglada/reswitcher

🍭 Functional switch case for redux reducers

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https://github.com/d-plaindoux/promiseme.js

Monadic promise built on top of Promise/A+ specification

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https://github.com/dhruvsrikanth/climbingeverestgame

Climb the treacherous Mount Everest in this exciting text-based adventure game! A game through which you can experience a pure (Haskell) climb!

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https://github.com/emanuelcasco/research-haskell-practise

Repositorio creado para hacer seguimiento y backup de los temas vistos sobre el paradigma funcional (en Haskell) de la materia "Paradigmas de programación" de la UTN

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

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https://github.com/plmuninn/scala-simple-validation

Scala simple validation library

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

Functional Programming code challenges on HackerRank

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Lessons from Meta certification

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https://github.com/teixdavide/FEUP_PFL_Parser

λ | Low-level machine interpreter and compiler project, including stack management, parsing, and compiling imperative programs

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https://github.com/olivier-boudeville/ceylan-curry

Curry: a Haskell Cookbook

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https://github.com/rakibhhridoy/predictingsequence-timeseriesanalysis

Time series data easy handling purposes in TensorFlow and python functional programming. Time Series data is handled and pre-processed by different steps,like making window of the data,splitting data for model purpose is also different than other processing methods. All has combined for easy access.

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https://github.com/iosialectus/haskellcipherplay

Implementations of RSA, Blum Blum Shub PRNG, affine and polyalphabetic ciphers, and supporting number theory in Haskell.

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https://github.com/scalateams/scalateams-claude-plugin

Specialist Claude Code agents for the Scala ecosystem — ZIO, Pekko, Cats Effect, build tools, codecs, HTTP, databases, and testing.

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https://github.com/ethern-myth/store-react

Shopping online store, react, .net core, postgresql

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https://github.com/marcelo-gomj/windows-10-calculator

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

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Last synced: 17 Apr 2026

https://github.com/rajasegar/effpy

My own Functional Programming utilities in Javascript

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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/minikin/github-swiftui

🦥GitHub meets SwiftUI

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https://github.com/divyanshu-rawat/a-react-game

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https://github.com/shakadak/ft_turing

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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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https://github.com/developeromarfaruk/react-authentication

Simple React Authentication Project with Firebase.

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https://github.com/skippia/starter-templates

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https://github.com/filiprd/monet

Online paintings retailer platform implemented in functional Scala 3

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https://github.com/hareeshreddi/programming-languages-lab

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

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

Rust |> functional programing = 💖

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https://github.com/asarkar/thinking-functionally-with-haskell

https://www.amazon.com/Thinking-Functionally-Haskell-Richard-Bird/dp/1107452643

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https://github.com/dhershman1/mondrian-elm

Elm rebuild of my mondrian idea

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https://github.com/rcardin/raise-scala-example

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https://github.com/wanjinyoo/csc330

Functional programming

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IO monad for Svelte

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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/rockofox/servant-miso-starter

A minimal Nix-first template for a full-stack Haskell app

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https://github.com/drmarjanovic/msc

An example of using telemetry in a system built on microservices-based architecture.

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https://github.com/tymorrow/elm-dist-demo

Compute Levenshtein distance using dynamic programming in Elm

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https://github.com/aleksandarskrbic/functional-rest-api-example

Purely Functional REST API showcase application

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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/Imtjl/fp-red-black-tree-dict

TreeDict - Implementation of Dict based on Red Black Tree in Elixir

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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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https://github.com/stephenjfox/calculator-http4k

Practicing in public 1. Kotlin 2. Web Server development 3. TDD 4. Functional-Programming Systems Design

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https://github.com/tolikpylypchuk/hs-bowling

A library which calculates a bowling score, written in Haskell

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

DCL-235: Effective Java Programming

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https://github.com/milaziabchenko/vanilla-javascript-playground

JavaScript theory and code snippets, using functional and OOP, prototypes, higher-order array methods, regular expressions, DOM, events, and asynchronous JS

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https://github.com/shybyte/rusty-13-ways-of-looking-at-a-turtle

Thirteen different ways of implementing a LOGO-style turtle in Rust

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https://github.com/lmarzocchetti/wangtiles-ml

Wang Tiles generator in Ocaml

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

Utilities for interoperating with Android

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https://github.com/kanitsharma/io

Lightweight monadic abstraction to "purely" handle side effects in javascript.

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https://github.com/bertrand31/data-structures-javascript

Collection of data structures implemented in a functional fashion in JavaScript

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https://github.com/kanitsharma/monad-fantasy

A collection of monads implemented in javascript

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https://github.com/kash1444/py_files

Here are some of my beginner codes to upskill my knowledge in python

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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/maleksandar/pure-framework

Master Thesis work

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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/constantiner/sibylla

Asynchronous Promise based functional style utilities with full TypeScript support

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https://github.com/davidboers/elmeither

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

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https://github.com/marinaa13/sat-solver-haskell

Functional SAT solver in Haskell implementing DPLL and CDCL strategies, with applications to the 3-coloring problem. Features lazy evaluation, clause learning, and non-chronological backtracking

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https://github.com/leovido/fp-casestudy-swift

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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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