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/web-pacotes/foundation-types

Curated package with types I believe all packages and apps need to promote safeness and reduced side effects.

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

H-99: Ninety-Nine Haskell Problems

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https://github.com/armcn/fp

Almost Practical Functional Programming in R

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https://github.com/js-factory/router

An opinionated functional programming based routing module

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Type stubs for toolz and tlz.

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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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Note and examples for algorythms and optimalization in Javascript

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https://github.com/mollybeach/apetalie

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https://github.com/yurkimus/functions

JavaScript-oriented utilities for functional programming

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Write an application by writing its topology.

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A minimal Result type for TypeScript.

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Haskell solutions hackerrank functional challenges

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Functional utilities for elegant function composition and state management in TypeScript

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https://github.com/vgalvoso/phunctional-php

A functional programming PHP framework.

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https://github.com/ladroid/mathelogos

The Mathelogos library is designed to introduce functional programming constructs to Rust.

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https://github.com/chicio/katas

💪🏋️‍♂️ A collection of katas I did to hone my programming skills. 🏋️‍♂️💪

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https://github.com/rcardin/reader-monad

A simple implementation of the Reader monad

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Desarrollo de la lógica con Haskell.

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Drawing creation in Elm

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https://github.com/federicobruzzone/software-foundations

Solutions (in Coq) of the exercises in the software foundation books.

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https://github.com/axect/fp-lecture

2018 Functional Programming Lecture in Yonsei Univ

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https://github.com/jordanblakey/ffjs

Lightweight, modular utility functions for arrays, browser, dates, strings, math, and more.

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https://github.com/bertrand31/pandore

📦 The functional files manipulation library Scala was missing

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

[uni] Functional Programming Course

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Haskell influenced Category Theory patterns implemented in Java

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A zero-cost, effect-based state machine library for Rust.

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Premortem for your app's config—finds all the ways it would die before it ever runs.

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https://github.com/drag13/whendo

Small function that can be used instead if-then statement in functional style programming with JavaScript

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https://github.com/kavalcante/array-into-subarrays

A non destructive and simple function that divide an array into multiples subarrays

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https://github.com/critocrito/curry

Named curry functions for fixed arities.

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https://github.com/sidmishraw/fjava

FJava, Java for functional programming

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My Haskell solutions for Project Euler problems.

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https://github.com/leejss/funtional-ts

It's a functional programming playground.

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Fun with flatMap - Now I know My ADTs (or How to Learn Monads by Accident)

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ZIO, One Monad to rule them all !!!

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https://github.com/mariomarton/racket-sudoku-solver

Sudoku solver in Racket for any board size (including hexadoku & larger), built without constraint solvers or mutations. It solves any legal puzzle and detects invalid ones.

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https://github.com/joelburget/hazel

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https://github.com/mnikander/cpp_sequence

Sequence pipelines in C++. A functional programming-inspired approach to processing data with map, filter, reduce, and more.

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https://github.com/matbesancon/pagerank

A functional, parallel PageRank implementation in Scala

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https://github.com/rudini/node_ports_adapters

Ports and adapter implementation of a restaurant reservation

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https://github.com/retheviper/gotlin

Some Kotlin-like functions.

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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/federicobruzzone/setup-ocaml-project-with-dune

This repository provides a basic setup for an OCaml project with using Dune as the build system. It aims to provide a simple and straightforward structure for your OCaml project, allowing you to focus on writing code without the complexities of a build system.

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https://github.com/dracotmolver/quartz-js

QuartzJS - A set of useful small functions

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Игра "Крестики-нолики"

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https://github.com/slowli/curry-chain

Chainable function currying

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https://github.com/valentindeaconu/terraform-provider-func

Supercharge Terraform with functional programming. 🚀

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https://github.com/firaja/identicon

Elixir implementation of Identicon

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https://github.com/kdungs/go-result

Result types for Go; because (T, error) can be considered a ✨ monad ✨.

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https://github.com/paudirac/cassiopeia

A turtle, what else?

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https://github.com/pmuens/fp

Doing some Functional Programming with Scala

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https://github.com/seb-bizeul/fp-flow

Collection of algebraic data types to use with Flow

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https://github.com/vickvey/complex_numbers

I have implemented Complex Numbers and some of the basic operations on them.

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Parallel Asynchronous Particle Swarm Optimization in Clojure

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https://github.com/rousan/tulip

A Golang utility library of many commonly used functions

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https://github.com/duruii/course-ucb-cs61a-spring2021

🪁Structure and Interpretation of Computer Programs, delivered by Paul N. Hilfinger & Pamela Fox

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https://github.com/psygo/haskell_lab

An environment for accelerated learning of Haskell.

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https://github.com/gregros/kubeq

Irreponsibly powerful tool for querying your k8s cluster.

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https://github.com/marcelo-gomj/note-share

Share notes web app.

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https://github.com/mrandl/satsolver

A toy functional and parallel SAT solver implementation in Scala

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https://github.com/michalzalecki/monadsjs

Ready to use monads in examples

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https://github.com/unacorbatanegra/tie_fp

FP opinionated in Flutter & Dart

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https://github.com/arindas/lazy-prime-sieve

Lazy Sieve of Eratosthenes for infinitely generating primes lazily in Rust.

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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/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/willguimont/pipeline

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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/rsachdeva/drsearch

Simple command 'drsearch'' to search for pattern in a file - using 'Generic' vs 'Trait Objects' Style Trait Oriented Implementations

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

:notes: notes/code/thoughts

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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/gribouille/json-auth-server

JSON Web token server with GraphQL API

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https://github.com/dhruvjawalkar/ocpjavase17dev

Reference code files used during practice for newer features in Java SE 17, Lambdas, Functional Programming, Streams, Concurrency, Sealed Classes, LocalDateTime methods, Records ...

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