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: 2026-07-05 00:08:24 UTC
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https://github.com/attack-monkey/react-fn

A simple, functional approach to React

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https://github.com/zalbia/zio-structure

Just learning how to structure ZIO programs

functional-programming scala zio

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

Promise Utilities

deferred functional-programming promise promise-utilities utilities utils

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https://github.com/barbixxxa/functional-programming-language

Disciplina de Linguagem de Programação Funcional com o Professor Luis Menezes - POLI/UPE 2016.2

functional-programming haskell

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https://github.com/benoid/rejoice-in-the-lambda

A repository of useful Scheme procedures.

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https://github.com/rom-chik/kma_fp

Functional programming course on Haskell.

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https://github.com/tsnobip/best-practices-and-fp

Programmations fonctionnelle et bonnes pratiques de développement logiciel

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https://github.com/nzrsky/funkobjc

Functional and typed extensions for ObjC 🚀

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https://github.com/hoishing/pipable

pipe operation in python

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https://github.com/seakayone/vavr-learning

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https://github.com/jwalsh/simulacra-scheme

Implementation of Jean Baudrillard's simulacra concepts in Guile Scheme, with social media simulation example and visual representations

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https://github.com/appsweet-co/ts-utils

Utility functions for TypeScript

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https://github.com/amillert/camodular

Ocaml interpreter (Sedlex tokenizer + Menhir parser) of modularized classes with two means of inheritance.

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https://github.com/davidlee18/minihaskell

a little, functional, and lazy language

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https://github.com/geekeast/intro-to-lodash-fp

Introduction to Lodash/fp

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https://github.com/kekyo/funcity

A functional language interpreter with text processing, easy embeddable! 📜

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https://github.com/aygp-dr/fixed-point-explorer

Y combinator and fixed-point recursion exploration across Scheme dialects with formal verification

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https://github.com/scarf005/ifexpr

please use ts-pattern instead

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https://github.com/leonardonicola/fp

Utility library for functional programming in Typescript

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

Implementations of the 99 problems in Erlang.

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https://github.com/primeeagle/concerto

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https://github.com/sigurd4/fn_zip

Provides a zip trait for functions, allowing two functions to be combined at compile-time before being called.

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https://github.com/th3n0m4d/functional-programming-meetup

Basic functional programming ideas illustrated with (the awesome) Ramda library.

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https://github.com/surjoyday/functional-procedural-objectoriented-programming

Code examples illustrating different programming paradigms: Object-Oriented Programming (OOP), Procedural Programming (PP), and Functional Programming (FP).

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https://github.com/mehmet-github06/shopping-card

Bu depo, basit bir alışveriş sepeti uygulamasını içerir. JavaScript, HTML, ve CSS kullanılarak geliştirilmiştir. Ayrıca, harici bir API'den rastgele ürün verilerini çeker.

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https://github.com/wdalmut/kata-example-1

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https://github.com/leobenkel/laeta

Agnostic service registry with fully typed retrieval

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https://github.com/laszlokorte/recursion-schemes

Introduction to recursion schemes (WIP)

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My first steps in Common Lisp. Code from the lectures on YouTube with my comments

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https://github.com/twilkinson3421/flec-pipe

Brings support for piping to JavaScript, with full TypeScript integration

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https://github.com/manoelcampos/fp-projeto-1-poligonos-flatmap

Um projeto base em OpenJFX para desenhar polígonos na tela e permitir a implementação de algumas funções para descobrir o tipo de cada polígono e calcular seu perímetro usando Stream.map() e flatMap()

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https://github.com/rvarago/cpp_optional_extras

*EXPERIMENTAL* A handful of C++ utilities I wish std::optional<T> had

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https://github.com/zerone0x/haskell99

Haskell 99 to help me learn functional promgramming

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https://github.com/fantiga/ticf-ic.com

Welcome in Christ. This project is a website for the Tokyo International Christian Fellowship (TICF). It is built using React, TypeScript, Vite, and Tailwind CSS, and supports multiple languages including English, Chinese, and Japanese.

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This project has to do with NUMEX (Number-Expression Programming Language). NUMEX programs are written directly in Racket by using the constructors defined by the structs defined

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NPM module to perform object to object mapping using reusable, composable filter functions (https://www.npmjs.com/package/object-to-object-mapper)

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https://github.com/bsgbryan/madul

Mädūl is the fun way to write functional code in TypeScript!

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Obsolete utility library for AHKv2

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https://github.com/rurumimic/lisp

List Processor

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https://github.com/giljr/turbo-todos

Turbo Todos is a simple To-Do List application built with Rails 8 and Tailwind CSS. This app demonstrates the use of Turbo Streams for dynamic, real-time updates without requiring full-page reloads.

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https://github.com/milaziabchenko/minimo-website

Stylish photodiary | lifestyle | travel multi-page website created with modern features of HTML5, CSS3, and JavaScript, combining functional programming and OOP approaches

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https://github.com/kevindasilvas/comments-kanban

Haskell microservice to add comments to a task in mini kanban project

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https://github.com/zhangchiqing/nnmap

Map a function over nullable value

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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/unisay/freer

Reading "Freer Monads, More Extensible Effects" paper by Oleg Kiselev and translating it to 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/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/blackwakhu/introduction-to-functional-programming

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https://github.com/zaikoxander/discover

Programa Discover da Rocketseat

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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/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

Production-ready set of templates for smooth DX (Typescript / FP-TS / Nest.js)

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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/dzangfan/evason

A lighweight programming language mixing JSON and functional features together

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https://github.com/mearns/fp-try

A Try encapsulates the result of an operation that may have failed.

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

Elm rebuild of my mondrian idea

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https://github.com/lorenzleutgeb/fp

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

Example Haskell program translated to STG and compiled to C

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https://github.com/bee-produced/bee-built

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https://github.com/ethowitz/sruby

An increasingly less miniature implementation of Ruby in Scala

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https://github.com/team846/code-2017

Code base for our 2017 robot - Punk Monkey

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

Multi-agent Claude CLI orchestrator -- a Team Lead delegates to Engineers and QAs, reviews their work, and hands you a PR for sign-off. Written in GALA with gala_tui.

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https://github.com/beyondnetperu/js-functional

A simple samples applying functional programming with JS

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https://github.com/danieljharvey/website-face

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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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https://github.com/gregros/naff

Client-side DOM swiss army knife and switchblade.

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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/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/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/deepcloudlabs/dcl165-2020-jan-02

Lab Projects studied in the training: DCL-165: Fundamentals of Scala Programming

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https://github.com/alvarogarcia7/2048-kotlin

Practiced OOP+FP creating a clone of the 2048 game

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https://github.com/thautwarm/xylearn

the way to fewer tasks and more convincing products.

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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

Implements the Either declaration in Elm.

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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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