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: 2026-06-25 00:08:15 UTC
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https://github.com/mmzk1526/lambda_calculus

Dart package for Lambda Calculus

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https://github.com/m-aqsam/flutter-functional-apps

Collection of Flutter Functional Apps

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Scala(-ble) recommender system architecture using functional programming (PoC)

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https://github.com/a1exwang/wtf-interp

An functional scripting language inspired by Ruby, Elixir, CoffeeScript, Python, etc

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Deferred async operation made easy in JavaScript

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Jargon from the functional programming world in simple terms! Now in Elixir!

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Algorithms and data structures implemented in Hy, a Lisp dialect for Python

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https://github.com/farbodsalimi/goulash

Goulash offers a variety of useful utility functions for everyday programming tasks by leveraging Go generics and keeping the functional programming paradigm in mind.

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A simple PHP extension with additional userland helper functions.

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Recopilación de cursos de programación funcional con Haskell.

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

A partir de la versión 8 de java la programación funcional se aplica con un estilo idiomático. Para entender la programación funcional es necesario volver a versiones anteriores.

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Lisp, but functional and parallel

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Easy to use monads (containers), with pattern matching, that improve the quality of your python code. Use Just to end checking for None, Success to end unhandled exceptions, Future for async, and Reader for dependencies.

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https://github.com/giu7d/doka-lang

DOKA Functional Programming Language

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Awesome tool for FP JS. Logging of the input and output arguments of the function on each call.

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https://github.com/timdeputter/FitEx

FitEx is a Macro-Module which provides a bit of sugar for function definitions.

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https://github.com/gregorykogan/result

result is a C++ library that provides a Result type, which can be used to return and propagate errors. It's inspired by Rust's Result type.

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🎓 Haskell problems of Programming Languages (FIB)

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🛠 Compose functions and promises

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Chris Hanson and the MIT Scheme Team. MIT/GNU Scheme reference manual. Technical report, Mas- sachusetts Institute of Technology, 2018.

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https://github.com/guillaumearm/redux-fun

:wrench: - Redux functional programming utilities

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150+ OCaml implementations: data structures, algorithms, interpreters, theorem provers, neural networks, distributed systems, and more

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https://github.com/thesephist/ittr

Small library of iterator-related utility functions for JavaScript

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https://github.com/oliverjash/simple-maybe

Simple helper functions (map, filter, flatMap, getOrElse, etc.) for transforming T | undefined types (Maybe<T>).

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Programming in a tagless-final style, naturally

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Encapsule Project Holistic App Platform runtime libraries and appgen utility.

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Functional javascript library

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Matrix applicative

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https://github.com/marcinzh/beam

Streams using Algebraic Effects and Handlers

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A proof-of-concept application to show the principles of purely functional programming

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https://github.com/ajitjha393/js-transducers

The Functional transducers that allow transformations with improved performance

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Spotify Previous Version | It's fully functional & responsive web design

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Microscopic functional programming context for TypeScript

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Java Programming Concepts

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https://github.com/bkosm/kpipe

A kotlin-native library introducing a functional-style pipe.

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https://github.com/szymon-budziak/functional_programming_course_agh

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Extra Actor functionality on top of the existing Akkling repository to create an Actor pipeline with ease.

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Elixir + Functional Programming fundamentals course, aimed for beginners. Provided by Octallium (Anil Kulkarni) through freeCodeCamp.org

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Beginner's guide to Haskell

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An easy-to-learn functional scripting language and runtime environment.

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https://github.com/rodrigoalvesvieira/if686

Documents, assignments and code from the Computational Languages Paradigms course at CIn/UFPE, in the semester of 2015.1.

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https://github.com/bredalis/js

✨ JavaScript's Files ✨

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The functional JavaScript course project will be to build a dashboard for the past and current **NASA Mars rovers**, information about each mission, and images from their excursions. You will be tasked with using all the ES6 syntax and functional programming concepts from the course to interact with a real NASA API and build the front-end logic to create the dashboard.

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https://github.com/sanwed/nonograms

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https://github.com/devkcud/salvation

💀 A generic Go wrapper for optional values, inspired by Rust's Option and Haskell's Maybe. Brings Possibly[T] to your codebase for safe, expressive nothingness.

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https://github.com/pschichtel/adventofcode-solutions

Solutions for http://adventofcode.com/ 2015 (implemented in functional Scala)

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https://github.com/codecop/fizzbuzz-with-nothing-kata

Exercise to practice working with functions.

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https://github.com/tinyj/tinyj-lazy

A thread and exception safe implementation of lazy (aka on-demand) value initialization.

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https://github.com/leostera/alonzo.js

Minimalistic Lambda Calculus Built with const and arrow functions

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https://github.com/vasilisp/pub

My academic publications

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An environment for accelerated learning of Haskell.

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Advent of Code 2023 with Scala 3 and the FP Typelevel stack.

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https://github.com/zhb2000/maybe-extension

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https://github.com/callmesalmon/kite

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Tiny utility for deeply mapping object keys

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Bring fold in functional programming to CLI.

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🐍 Typed pipes

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