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: 2026-06-24 00:08:05 UTC
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https://github.com/fullstackjavadevelopercommunity/java8program

Core Java 8 Programs

functional-programming java8 lambda-expressions streams

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https://github.com/costineest/rpu

Reactive programming for UI (ReactJS mostly)

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https://github.com/mariankapisinsky/FIT-VUT-NNET

Some of the school assignments from my master's degree study.

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https://github.com/thomasevano/tic-tac-toe-tdd-fp

A simple tic-tac-toe chore concept developed using test-driven-development and fonctional programming

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Help AI coding agents use Java Optional well in new code and cleanup, without replacing one antipattern with another.

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https://github.com/jvz/musigma.blog

A blog about programming.

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https://github.com/imdarshangk/functions

This repository contains various Python programs that demonstrate the use of functions with and without return values and arguments. The programs cover different mathematical operations and concepts.

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A Clojure webhook handler for processing and validating payment events with SQLite persistence and HTTP callbacks for confirmation/cancellation.

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https://github.com/mahi97/numex-lang

~ The pure functional Interpreter for NUMEX Language Based on Racket

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https://github.com/rcardin/raise4s

Porting of the Raise DSL from the Arrow Kt Kotlin library

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https://github.com/blutorange/js-elbe

Utility for working with streams (iterables).

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Solutions to the exercises proposed during the courses on RockTheJvm site

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Examples of some use cases of the doobie library

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Online paintings retailer platform implemented in functional Scala 3

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Repository containing solutions for problems in "Joy of Kotlin" book

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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/justdvnsh/func.py

A practical functional library for Python Lovers.

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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/hyperifyio/gnd

Gendo Lang

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https://github.com/kubepay/java-cs-to-enterprise

This repository acts as standalone or upcoming book for educating interested Computer Science students to Data Structures, Algoritms, Design Pattersn on Java 8.

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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/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/joaom00/js-funcional-reativo

Repositório para o curso JavaScript Funcional e Reativo - PENSE como um Dev JS da Cod3r

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https://github.com/i-walker/fp-ts-slides

Slides for Typed FP in TS

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

A collection of monads implemented in javascript

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https://github.com/darren277/lisp-music-gen

A very basic melody generation tool written in Lisp. There is also Postgres interactivity.

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https://github.com/int64ago/mutate

Modify object and return immutable object.

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Homework repo for functional programming

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Examples and exercises from "Functional Programming in Lean" - David Thrane Christiansen

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https://github.com/denieler/angular-sequence-events

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https://github.com/kathleenwest/advancedconsoleapplicationi

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Turin Machine simulation to add one bit to a binary number

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https://github.com/paulpdaniels/streamish

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Option pricing application written in F# and C#.

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Programación funcional en Java con Lambdas y Streams

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Playground for functional programming with Scala

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https://github.com/dashkite/joy

The simplicity of Lodash with the functional flair of Rambda.

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Trabajo práctico de asignatura técnicas avanzadas de programación de UTN donde el objetivo sumergirse en el paradigma hibrido de objetos y funcional

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Learn fxjs based on functional-programming concept

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https://github.com/sgon4arov/plato

🤖 Enhance coding with Plato, a CLI-compatible AI assistant that streamlines coding tasks while integrating seamlessly with GitHub Copilot.

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Key utilities that will simplify your work with Javascript

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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/simonwjackson/tetris.js

Tetris in pure JavaScript

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https://github.com/otbivnoe/haskell-time

Functional programming seems really interesting. Change your imperative mind and take over the world!

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https://github.com/palutz/calculateseries

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https://github.com/matt-mcmahon/functional

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https://github.com/kiwamizamurai/miso-numeron

A Bulls and Cows number guessing game built with Haskell and Miso framework, compiled to WebAssembly

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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/phantie/pipe-forward

A tiny functional composition utility for Python. It allows you to create pipelines of functions using the | operator. Similar to |> (pipe forward) operator in F#.

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https://github.com/priontoabdullah/simple-calculator-vanilla-js

🔢 A simple vanilla js Calculator. 🌎 Live demo: https://priontoabdullah.github.io/Simple-Calculator-Vanilla-JS/ 🙌

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https://github.com/jferard/yamft

YAMFT (Yet another `more-functools`) is another functional library for Python

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https://github.com/moonfloof/CMP6090

Functional Programming - University Coursework/Homework

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https://github.com/tsheporamantso/oop-projects

These are practice projects on JavaScript Object Oriented Programming

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https://github.com/zeucxb/alura-functional-js

Curso de javascript funcional da Alura.

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https://github.com/saidali-ibn-zafar/hard-parts-of-functional-js-fundamentals

Explore the increasingly popular paradigm of functional programming in JavaScript! You’ll learn how to wield and manipulate functions to develop more readable, maintainable and manageable codebases. You’ll go under the hood of powerful techniques like: Higher Order Functions, Function Composition, Pure Functions, and Immutability of State.

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