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: 2026-06-29 00:11:58 UTC
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https://github.com/arc-hugo/debt_calculator

Implementation project of an algorithm computing the max-flow of a flow graph and apply it in a debt calculator app.

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https://github.com/albertllousas/auctions-microservice

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https://github.com/helton/labs

:mag_right: My experiments

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

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https://github.com/gummif/endocpp

Modern C++ functional programming concepts library

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https://github.com/fitter0happier/lambda_parser

Lambda Calculus parser

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https://github.com/foyez/fp

Functional Programming

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functional programming library for Python

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👂 RxJS operator for realtime speech-to-text (STT/S2T) using AWS Transcribe

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https://github.com/atomicptr/php-functional

A set of tools to enable a more functional style of programming in PHP, inspired by OCaml

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https://github.com/antoniomdk/hashcode2018

Hash Code 2018 Problem Solution

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My fun super interesting blog take a read

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Generate random chess position/perft

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A pure functional Scala client for Openstack Keystone implemented using Http4s client.

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A set of flexible, type-safe functions to manipulate arrays of models

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Ports and adapter implementation of a restaurant reservation

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https://github.com/john-cd/deduplicator

a tool to identify duplicate files

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https://github.com/kaliv0/fumus

Functional musings in Python

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https://github.com/rcdilorenzo/tictactoe

A reinforcement learning algorithm with a touch of functional programming

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🚰 RxJS operators for working with Socket.io (v4 or lower) servers

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https://github.com/mohamad-shosha/function-programming

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https://github.com/rcardin/fp-scala

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MIDI messages for Python

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https://github.com/lenguyenthanh/scalachess-tests

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https://github.com/javanile/boor

🐮 Use only if you hate good manners

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snake game built with just react hooks

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[O]Caml compiler

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https://github.com/robertdp/education-reports-frontend

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https://github.com/lebrancconvas/typescript-functional-programming

Using TypeScript to clarify the concept about "Functional Programming".

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https://github.com/kalongn/cse-216

Programming Abstraction (College Class).

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https://github.com/matbesancon/pagerank

A functional, parallel PageRank implementation in Scala

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https://github.com/dyalog/presentations

Presentation materials

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ZIO, One Monad to rule them all !!!

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Compile-to-JS language built in Gleam.

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

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https://github.com/svozza/functionalish-refactor

A non-trivial asynchronous code example that interacts with multiple AWS services implemented in imperative, promise-based and purely functional style.

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https://github.com/mattdean1/functional-programming

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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/eilvelia/contravariant

Contravariant functors in JavaScript + Flow with correct type inference

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

A functional programming PHP framework.

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https://github.com/fantiga/github-query-react-ts

This is a demo of implementing GitHub repository search functionality with React and the GitHub REST API.

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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/cicovic-andrija/scala-image-editor

Image editing desktop application written in Scala

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https://github.com/patrixr/capacitor.js

Functional utility method: a capacitor concept

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https://github.com/helins/fn.cpp

Pass around c++ fns and methods, get performance

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https://github.com/n1nj4t4nuk1/storable-functions.js

λ Storable and executable functions using array based simple syntax and functional programming.

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https://github.com/joaocarvoli/scala-course

A 6-week course from École Polytechnique Fédérale de Lausanne (EPFL) about the fundamentals of scala functional programming language

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https://github.com/joao-coimbra/failcraft

Functional error handling for TypeScript — Either-based error handling with full type inference, chainable transforms, and async support

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https://github.com/mehmet-github06/find-country

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

LocalStorage CRUD

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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/web-pacotes/foundation-types

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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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QR generator working with API. It is a practice to improve my skills in JavaScript

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JSON Web token server with GraphQL API

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https://github.com/jvmakine/shine

LLVM frontend for Shine

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

A simple implementation of the Reader monad

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https://github.com/p0lunin/vglang

????

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

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https://github.com/smachave/some

`unless var.nil?` as a block

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

My solutions for Advent of Code starting from 2015

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Finds the best (cheapest) route from a starting point towards a destination

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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/davidmarne/functional_flutter

Tools for composing flutter widget trees in a functional manner.

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https://github.com/michalzalecki/monadsjs

Ready to use monads in examples

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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/itemconsulting/enonic-wizardry

Functional utility library for Enonic XP

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https://github.com/rxtoolkit/utils

🛠️ RxJS operators for very common data transformation tasks

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https://github.com/devmahmud/javascript-from-fundamentals-to-functional-js

Learn higher-order functions, closures, scope and the fundamentals necessary to use modern frameworks like React, Angular and Vue. You'll master key functional methods like map, reduce and filter ...plus promises and ES6+ asynchronous JavaScript!

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