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/davidlapadula/jsfunctionalprogramming

composition currying functional-programming imperative-programming

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https://github.com/bra1l0r/iterify-rs

Iterate over anything with Iterify!

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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/mahmud035/javascript-pro-by-colt-steele

This repository provides a comprehensive guide to advanced JavaScript concepts and techniques.

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https://github.com/dirkjbosman/func_with_scala

Func / Functions / Fun with Scala :)

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https://github.com/fkoler/js-advanced-concepts

ZTM - JavaScript The Advanced Concepts

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

A collection of modular libraries tailor-made for Kotlin enthusiasts.

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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/martianoff/rules-gala

Bazel rules, a bzlmod extension, and a gazelle plugin for building, testing, and transpiling the GALA language — plus a Bazel module registry that publishes rules_gala.

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https://github.com/sandwwraith/fp-homework

Homework for FP ITMO course

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Hakyll site for danieljharvey.github.io about mostly Haskell shit at the moment.

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Compute Levenshtein distance using dynamic programming in Elm

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https://github.com/sumanjitsg/redistil

A minimalist Redis re-implementation in Elm, bringing the power of functional programming to Redis interactions.

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some haskell-wannabe functions in JS (typescript)

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https://github.com/raiondesu/if-const

New word in javascript conditionals!

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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/iamfarrokhnejad/functional-love

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https://github.com/hamidhosen42/functional-banking-website-js

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https://github.com/zhangchiqing/nnmap

Map a function over nullable value

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https://github.com/recursivelogic/haskell-bot

Haskell Discord bot for the FP Discord server

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https://github.com/ahlusar1989/spark2sfoverflow

StackOverFlow K-Means Analysis

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https://github.com/dragos-tudor/frontend-rendering

Rewritten React core library [functional principles].

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https://github.com/antoniomdk/99-scala-problems

My own solutions to 99 Scala Problems.

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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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https://github.com/packquickly/little_lambda

Function composition, the un-Pythonic way!

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https://github.com/kczulko/astar

A* algorithm

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https://github.com/hecdelatorre/programacionfuncionalagenda

Proyecto realizado en netbeans 12 con jdk 11

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https://github.com/ethern-myth/javascript

OOP, Arrays and Objects and more

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https://github.com/leovido/fp-casestudy-swift

Swift version of the original 13 ways of looking at a turtle in F# by Scott Wlaschin

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https://github.com/rafaelvicio/pokedex-rxjs

Pokedex. Projeto utilizado para aprendizado de RxJS(Programação Funcional)

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

Promise Utilities

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https://github.com/quacksouls/jaf

Adventures in functional JavaScript

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https://github.com/zhongzc/gparser

A naive parser combinator library

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https://github.com/wking-io/lemonade

Composable AJAX requests that return a Future Data Type

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https://github.com/agnivchtj/scala-interpreter

Built a definitional interpreter that parses, desugars and interprets the value of a core-language expression.

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https://github.com/tralahm/scala-by-example

Scala is a tastefully typed language: it is statically typed, but explicit types appear in just the right places. Scala takes powerful features from object-oriented and functional languages, and combines them with a few novel ideas in a beautifully coherent whole. The syntax is so lightweight, and its primitives so expressive, that APIs can be used with virtually no syntactic overhead at all. Examples can be found in standard libraries such as parser combinators and actors. In this sense Scala supports embedded domain-specific languages.

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https://github.com/tdibacco/fp

Functional Programing constructs for Go.

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https://github.com/johnnynotsolucky/fu

Ramda, but shitty and without the docs.

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https://github.com/juop12/exactas-plp-cnil

Implementaciones de trabajos prácticos para Paradigmas de Lenguajes de Programación - 2do cuatrimestre 2025. TP1: Calculadora Incierta en Haskell con manejo de incertidumbre estadística.

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https://github.com/sophiecollard/variance

Simple examples to illustrate the differences between invariance, covariance and contravariance in Scala

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https://github.com/dubzzz/scala-2048

2048 in Scala

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https://github.com/ricardorobledo/programacionfuncional-python

Recopilación de ejercicios de programación funcional en Python

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https://github.com/samuelastech/invoices

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https://github.com/arikgershman/ocaml-intro-330

An introductory OCaml project focused on functional programming fundamentals, demonstrating proficiency in recursion, pattern matching, list operations, and higher-order abstractions (map/fold).

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https://github.com/rcardin/cats-effect-playground

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

These are practice projects on JavaScript Object Oriented Programming

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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/johnanon9771/concepts-fundamentals

Repository for experiments :smile:

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https://github.com/arodriguezfontana/functional-programming-unq

Prácticas realizadas para Programación Funcional de la UNQ.

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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/garyhilares/minesweeper

Simple Minesweeper game written in ISL with lambdas (a functional programming variant of Racket).

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https://github.com/dashkite/joy

The simplicity of Lodash with the functional flair of Rambda.

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https://github.com/armadacore/essentials

TypeScript essentials for explicit error and absence handling - Option, Result, typed Exceptions and optional Callbacks the compiler actually enforces.

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https://github.com/dimasmiftah/structuring

Structuring data from .txt file to JavaScript object literal using higher-order functions.

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https://github.com/yisus82/fic-pf

Programación Funcional - Facultad de Informática de A Coruña

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https://github.com/faylina/spellbound-treasures

First project utilizing JavaScript to create a shopping cart

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https://github.com/j-christl/ocaml-utils

Some basic OCaml utility functions I will keep updating while learning functional programming

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https://github.com/miomit/jscalculator

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

Homework repo for functional programming

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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/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/aayushyadavz/keeper-app-react

Created a Keeper App using React in which we can add our notes.

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https://github.com/justdvnsh/func.py

A practical functional library for Python Lovers.

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

Utility for working with streams (iterables).

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https://github.com/costineest/rpu

Reactive programming for UI (ReactJS mostly)

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https://github.com/juthawong/jquery-oddeven.js

Simplify Even and Odd HTML DOM Element Stuff , Save Time and Make Coding Easier and Fun. Just for fun

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https://github.com/corporatepiyush/clj

Clojure examples and tutorial

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https://github.com/jack994/lambdacalculus_in_sml

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https://github.com/edwyng/ldp-haskell-draft-beers

Programa diseñado con programación funcional que permita determinar cuántos litros de cerveza deben agregarse entre los barriles para servir exactamente n vasos de cerveza desde cualquiera de las salidas.

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https://github.com/sharpmiind/erlang-1em

🛠️ Develop and test Erlang applications effortlessly with erlang-1em, simplifying deployment and enhancing productivity for developers.

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Iterative functions for functional programming in Go.

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https://github.com/eoic/adventofcode2021

Advent of Code solutions in Elixir.

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https://github.com/stackbuilders/functional-programming-patterns

Code snippets used during the presentation

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https://github.com/pfpack/pfpack-core-func

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

This is a repository with an implementation of Conway's Game of Life. The game itself is implemented using several stacks in C#, F# and TypeScript. The purpose behind it is to have a small real-world example to show functional principles and features. Moreover, the repository is organized as 3 different projects an a small book/course in markdown to describe functional programming and reactive programming.

asp-net-core aspnetcore csharp fsharp functional-programming functional-reactive-programming immutability net-core-3 pure-function reactive-extensions reactive-programming reactjs referentially-transparent rx signalr-core typescript unidirectional-dataflow