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: 2026-06-30 00:12:00 UTC
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https://github.com/leovido/fp-casestudy-swift

Swift version of the original 13 ways of looking at a turtle in F# by Scott Wlaschin

dependency-injection functional functional-programming functional-programming-examples ios-swift refactoring swift swift5

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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/zhongzc/gparser

A naive parser combinator library

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

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

functional-programming haskell

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https://github.com/plave0/pp

Programming paradigms course material.

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https://github.com/kaierikniermann/result-py

Small functional library with strict typing in python 3.14

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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/euler-b/firts_steps_with_elm

Repositorio destinado a ser la guia de inicio para entender este lenguaje

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https://github.com/erikmueller/slackoverflow

Private blog & cv

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https://github.com/mp81ss/apply

apply function implementation for C language

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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/drmarjanovic/msc

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

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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

functional-programming http4k kotlin tdd web

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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/divyanshu-rawat/a-react-game

A kuch bhi (Game) built using react.js

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

A collection of monads implemented in javascript

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https://github.com/int64ago/mutate

Modify object and return immutable object.

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https://github.com/fullstackjavadevelopercommunity/java8program

Core Java 8 Programs

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https://github.com/didierfranc/sweetch

Switch as a function

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https://github.com/jtberglund/snowballr

A simple library for composing error messages

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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/faylina/witching_hour_chronicles

A witchy blog that utilizes PHP

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https://github.com/nerac/keyu

Key utilities that will simplify your work with Javascript

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https://github.com/min-thway-htut/programming-with-javascript

Lessons from Meta certification

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https://github.com/scmorrison/perl6-fp-notes

Notes on functional programing techniques with Perl 6

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https://github.com/gekomad/fpinscala

Exercise solutions for "Functional Programming in Scala"

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https://github.com/nathaniyell/meta-js-course

A repository with details of the different Javascript concepts learnt in Meta's Javascript course on Coursera

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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/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/asarkar/thinking-functionally-with-haskell

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

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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/ghivert/papers

All articles published both on Medium or on my blog!

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https://github.com/jumpn/utils-composite

Composite Utilities

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https://github.com/guibrandt/higher-kt

Some experiments with annotation processors, code generation, higher kinded types (sort of) and typeclasses (sort of) in Kotlin

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https://github.com/santymendez/tp-tadp-hibrido-objetos-funcional

Desarrollo de un Parser para interpretar imágenes realizado en la materia Técnicas Avanzadas de Programación en UTN FRBA

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https://github.com/civilizeddev/functional-design-and-architecture-in-scala

Functional Design and Architecture in Scala

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https://github.com/jonaskromer/blackjack

Blackjack implemented using scala providing a tui and gui

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https://github.com/v-spassky/drainage

🚿 Implementation of pipe expressions for Python.

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https://github.com/mrcfps/functional-programming-in-scala

Scala course programming exercises from Coursera.

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https://github.com/lordgoatius/comonad_rust

Attempt at encoding comonadic effects in Rust (inspired by @SheafificationOfG )

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https://github.com/qrailibs/functir

✨ Functional programming library for JavaScript. Fully type-safe.

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https://github.com/ronanyeah/ramda-workshop

FAC Workshop - March 2017

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https://github.com/asterinos1/movie-preference-analyzer

INF424 Project 2025: Movie Preference Analyzer. Big Data analytics tool using Apache Spark, developed in Scala. adhering to functional programming rules.

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https://github.com/firestone82/mazelib-gui

VŠB-TUO - School project in SKJ

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https://github.com/birdmod/acreader

A tool to browse anime by season and year based on Anilist API.

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https://github.com/NashTech-Labs/fp-scala

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https://github.com/kattulib/yay

[IN DEVELOPMENT] Yay is a functional simple http server

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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/sekky61/rust-iterator-aoc

Advent of Code challanges solved using Rust's iterators and functional programming

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https://github.com/mathemage/fup-programming-exam

Programming exams for B4B36FUP Functional Programming

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https://github.com/upi20/php_oop

OOP PHP Fundamental

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https://github.com/courses-at-nju-by-hfwei/learning-haskell

Learn Haskell and Generally Functional Programming

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

Haskell, Erlang, Reactive functional programming

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https://github.com/subhashchandra-birajdar/java-8-guides

Java 8 Programs, All java features practice

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https://github.com/turbaszek/ct4cs

Challenges from Category Theory for Programmers

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

My functional math studies with Haskell

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https://github.com/juliencrn/chessgame

F# functional domain-driven design CLI Chess Game made for learning purpose

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https://github.com/ghillairet/frdomain-kt

Kotlin version of code from the book Functional and Reactive Domain Modeling

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https://github.com/luizcalaca/ts-node-joi-api

Typescript API with Joi validations, Express.js and MySQL. The project has the main branch to show the solutions with functions and the change-oop-api-ts to show with Object oriented programming.

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https://github.com/cianidos/simple_search_engine

HyperSkill/JetBrains Academy project

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https://github.com/numq/fn

Golang functional components

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https://github.com/hillaryjude/python-from-scratch-part-3-func-prog

Concepts on Sets, functional programing and its inbuilt functions

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

Taking a stab at doing the AoC in Haskell (at least Day01 :))

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https://github.com/danyst/iosfunctionaltable

Keepcoding Master Mobile Engineering Bootcamp - iOS Advanced - Functional programming exercise

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https://github.com/akotronis/dit280

Advanced Languages and Programming Techniques

functional-programming haskell

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https://github.com/eckelon/sanctuarycustomtypesexample

Easy example of how to define custom types with Sanctuary and using them in safe functions

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https://github.com/harmim/vut-flp-labs

Funkcionální a logické programování - Cvičení

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https://github.com/mehmet-github06/pokemon-app

If you want to revive your memories, you can look at the pokemon application.

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https://github.com/niuiic/fx-flow

A functional library for TypeScript/JavaScript.

functional-programming typescript

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https://github.com/fblupi/grado_informatica-ntp

Prácticas de la asignatura Nuevas Tecnologías de la Programación de la UGR

functional-programming java-8 scala

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https://github.com/ntwilson/linqed

LINQ Extended Design. Additional C# extension methods (inspired by LINQ) and F# collection functions

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https://github.com/athrocks/java-8-stream-api

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https://github.com/arufonsekun/nukes

Repository to host clojure study codes

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https://github.com/sandwwraith/fp-homework

Homework for FP ITMO course

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

Haskell Functional Programming Course

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https://github.com/ahlusar1989/java-workshop-materials

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https://github.com/paudirac/fsharp-introduction-slides

Introductory F# presentation for workmates (kind of trying to conquer the world)

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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/wlgs/functional-programming-course

Functional Programming Course 2021/22 at AGH UST. The language used was Haskell.

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https://github.com/maccauhuru/modern-js-sandbox-code

Code i am writing for the modern JS from beginning course

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https://github.com/iampeterbanjo/alchemy

Elixir/Phoenix portfolio apps

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https://github.com/dirkbosman/func_with_scala

Func / Functions / Fun with Scala :)

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https://github.com/qbarrand/ensiie-iprf-quadtree

An academic project about collision detection to learn the quadtree data structure and functional programming

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https://github.com/markehost/javascript-exercises

Coding exercises in JavaScript.

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https://github.com/pfpack/pfpack-core-func

PrimeFuncPack Core.Func is a core library set for .NET consisting of functional interfaces (SAM interfaces) and the extensions targeted for use in functional programming. There are both asynchronous (Task and ValueTask based) and synchronous interfaces and the extensions in the set - IAsyncFunc/IAsyncValueFunc and IFunc.

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