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: 2026-07-06 00:11:57 UTC
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https://github.com/franciscomsm/fp-in-js

Functional programming in JS - talk assets

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

Rewritten React redux library [functional principles].

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https://github.com/liitfr/sort-my-items

Sort an array's (or anything else's) items by defining a hierarchical set of criterias, à la FP

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https://github.com/james-p-d/lambda

A simple Lambda expression interpreter in Java

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https://github.com/skippia/meta-playground

Aggregated playground: all my learning repos as git submodules — algorithms, Node.js, TypeScript, DevOps, databases, patterns & more

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Scala-based Haskell monoid implementation

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Objects to support checked exception in lambda

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Functional-style error handling in C# using a simple Either implementation.

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Escher's Square Limit in R with funcgeo.

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🚀 Explore programming with this guide for kids. Discover languages like Python and JavaScript, and start your journey in IT careers today.

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Generative or property based testing for Ruby

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https://github.com/asarkar/scala-with-cats

Scala with Cats

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Thread-safe immutable objects that provide delegation and basic validation to hashes.

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Advent of Code 2017 with ReasonML

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https://github.com/jottenlips/functionalobjc

λ Example project for using higher order functions in objective c

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https://github.com/ythecombinator/jaspion

Practical java 8 utility belt for you projects.

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https://github.com/rosewood69/javascript-html-css-telephone-number-validator

This is freeCodeCamp "JAVASCRIPT ALGORITHM & DATA STRUCTURE" Certification Project (TELEPHONE NUMBER VALIDATOR).

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https://github.com/hfagerlund/hey-haskell

An introduction to Haskell

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https://github.com/catseye/sally

MIRROR of https://codeberg.org/catseye/Sally : A cute but naïve functional language - "upside-down Forth cake".

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https://github.com/endou-mame/php-monad

📦 Implemented the concept of monads in functional programming in PHP.

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https://github.com/Btylrob/btylrob.github.io

My personal blog built with Ocaml and Soupault.

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https://github.com/catseye/deturgenchry

MIRROR of https://codeberg.org/catseye/Deturgenchry : An OO language where `self` is a continuation (sort of)

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https://github.com/saber2pr/ts-monad

TS-Monad inspired from Haskell-Monad.

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https://github.com/pjiwm/functional-rust

A Rust library for functional programming, providing function composition, currying, and higher-order functions. This crate can be compiled on nightly Rust.

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https://github.com/exiahuang/lwc-ramda

Ramda js for salesforce lwc developer

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https://github.com/exiahuang/lwc-lodash

Lodash js for salesforce lwc developer

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https://github.com/umesh-timalsina/ts-monads

Monads Playground in TypeScript

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https://github.com/wdalmut/kata-example-3

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https://github.com/abualiyousef/string-calculator-task

This project is a String Calculator implemented in F#. It processes strings of numbers with various delimiters, handles new lines, and ignores numbers over 1000. It adheres to clean code principles and SOLID design, ensuring robust and maintainable code. Comprehensive unit tests are included to verify functionality.

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https://github.com/tr-yasuda/kitsunejs

Type-safe Result and Option utilities for TypeScript, inspired by Rust. Safer error handling with a lightweight functional style.

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https://github.com/stevenchen3/ragdoll

Learning Typelevel's Cats library

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https://github.com/heitorgandolfi/elm-todo-list

Simple ToDo list application built in Elm for study purposes

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https://github.com/appsweet-co/ts-utils

Utility functions for TypeScript

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https://github.com/gabrielgiussi/scala-cats

Exercises from Scala with Cats

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https://github.com/devkiloton/java-ft

Code used in my workshop at UNICAMP university to show the benefits of the functional programming on Java, and compare imperative & declarative code.

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https://github.com/mrbrunelli/my-first-elm-app

My Fist App using Elm Lang

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https://github.com/yoyolicoris/qmul-ecs713-fp-final

My individual coursework of the module ECS713P Functional Programming, QMUL.

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https://github.com/reubano/pyconza-tutorial

Jupyter notebooks and data for "Data Mining and Processing for fun and profit" PyConZA16 tutorial

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https://github.com/jwhittle933/funked

A Functional Library for Go

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https://github.com/aryanpillai2007/computer-science-3-labs

All of the Advanced Computer Science 3 Labs I have completed over the 2024-2025 school year.

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Statically typed Python utilities for functional programming.

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https://github.com/gailo22/hello-scala

sample scala sbt project

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https://github.com/inblack67/elixir-fundamentals---udemy-course

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https://github.com/monban/fp

Collection of functional programming constructs for Go

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https://github.com/raboro/sorting-algorithms-in-haskell

Most common sorting algorithms implemented in Haskell (Quicksort, InsertionSort, MergeSort, BubbleSort, HeapSort, SelectionSort, Radixsort, Bucketsort and Shellsort)

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https://github.com/asarkar/book-of-monads

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https://github.com/nihadamirov/holbertonschool-low_level_programming

C - Programming Language

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https://github.com/joshuaganter/go-functional

Iterative functions for functional programming in Go.

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https://github.com/badeend/nothing

If you want to use `void` as a type parameter, but C# won't let you...

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https://github.com/raiyanu/bug-tracked

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https://github.com/mtumilowicz/scala-optics-monocle-quicklens-workshop

Introduction to Optics (Lenses, Prisms etc) in Scala.

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https://github.com/robertdp/engineering-test-api

Minimalistic API made for an engineering test

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https://github.com/jcaromiq/functional-programming-in-java

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https://github.com/francisbarton/adventofcode_2023

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https://github.com/matheusphalves/functional-programming-paradigm

This repository will show to you how functional paradigm works in a feel examples: implementation of Data structures, high order functions and other functional functions.

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https://github.com/primeeagle/sonata

A modern scripting language with an advanced type system, supporting both object-oriented and functional programming paradigms.

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https://github.com/eminencegrs/fp-in-fs

Exercises to the book "Functional Programming Using F#" written by Michael R. Hansen and Hans Rischel

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https://github.com/dirtsimple/fun-factory

Fluently (and efficiently) compose PHP functions, methods, and lambda-expression strings

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https://github.com/aaronlelevier/programming-in-erlang-2nd-ed-book-code

Programming in Erlang 2nd Ed. Book code and practice

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https://github.com/chihaya-yuka/hackchat-haskell-bot

Hack.Chat's functional bot.

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https://github.com/albertllousas/flight-booking-microservice

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https://github.com/nohomey/prolog-interpreter

Basic Prolog interpreter written in Haskell for the Functional programming course in univeristy (FMI at SU)

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

Rewritten React router library [functional principles].

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https://github.com/williamlsh/js-pandora

Practical challenging cases involved with algorithm, functional programming and interviews implemented with JavaScript

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https://github.com/ashr123/exceptional-functions

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https://github.com/tmartins11/progfuncional

Repositório para armazenar todos os projetos desenvolvidos na disciplina de Programação Funcional - BCC | UNIFAL.

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https://github.com/noyzys/nautchkafe-scylladb

Lightweight, functional, modular, and flexible way to interact system built with ScyllaDB

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https://github.com/vasilvelikov00/effective-ui

Composable, effect-based UI framework built on Effect.ts

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https://github.com/asllop/calf

Programming language for parallel maths and vector processing in Rust.

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https://github.com/papilo-cloud/pony-express

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