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/y2k2mt/grouping-n

A tiny API: Just shuffles the given names.

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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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https://github.com/a248/jdbcaesar

Conquer the verbosity of plain JDBC.

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https://github.com/zhibirc/dev-random

:notes: notes/code/thoughts

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https://github.com/abengl/ntt-project2-customerms

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https://github.com/thma/clean-architecture-with-functions

Clean Architecture in Haskell. Using higher order functions for 'dependency injection'

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https://github.com/michalzalecki/monadsjs

Ready to use monads in examples

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https://github.com/vickvey/complex_numbers

I have implemented Complex Numbers and some of the basic operations on them.

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https://github.com/seb-bizeul/fp-flow

Collection of algebraic data types to use with Flow

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https://github.com/fresult/task-mgmt

My Reactive Programming learning using Spring Boot Webflux, and Kotlin.

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https://github.com/paudirac/cassiopeia

A turtle, what else?

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Elixir implementation of Identicon

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Supercharge Terraform with functional programming. 🚀

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https://github.com/mnikander/cpp_sequence

Sequence pipelines in C++. A functional programming-inspired approach to processing data with map, filter, reduce, and more.

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https://github.com/joelburget/hazel

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https://github.com/mariomarton/racket-sudoku-solver

Sudoku solver in Racket for any board size (including hexadoku & larger), built without constraint solvers or mutations. It solves any legal puzzle and detects invalid ones.

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https://github.com/marcosh/effector

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https://github.com/karmakaze/monadts

Fun with flatMap - Now I know My ADTs (or How to Learn Monads by Accident)

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https://github.com/mstniy/computed.dart

A performant and flexible reactive programming framework for Dart

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https://github.com/05st/project-euler

My Haskell solutions for Project Euler problems.

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https://github.com/critocrito/curry

Named curry functions for fixed arities.

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https://github.com/kavalcante/array-into-subarrays

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https://github.com/drag13/whendo

Small function that can be used instead if-then statement in functional style programming with JavaScript

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https://github.com/jordanblakey/ffjs

Lightweight, modular utility functions for arrays, browser, dates, strings, math, and more.

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https://github.com/mrdimosthenis/creative-elm

Drawing creation in Elm

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https://github.com/jaalonso/logica-en-haskell

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https://github.com/filipbolt/hackerrank_functional

Haskell solutions hackerrank functional challenges

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https://github.com/dnlowman/result-ts

A minimal Result type for TypeScript.

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Differentiable Programming: Lisp deep learning by hylang

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https://github.com/yurkimus/functions

JavaScript-oriented utilities for functional programming

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https://github.com/yurrriq/vfp-in-agda

:book: Verified Functional Programming in Agda

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https://github.com/manuelelucchi/functional.jl

A simple Julia library to boost your functional code

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:mag_right: My experiments

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https://github.com/tosun-si/bees-demo-fp

This project shows some legacy code and patterns and a refactoring for each of them with Functional Programming, lambda and functions composition

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https://github.com/steventimes/fpstreams

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

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https://github.com/perkss/perkss.github.io

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https://github.com/kaliv0/fumus

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https://github.com/rxtoolkit/socketio

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

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https://github.com/tomsquest/mediathequeroubaix.py

Python CLI for the library of Roubaix (Médiathèque Roubaix)

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https://github.com/lucasbotang/made_up_programming_language

MUPL language interpreter implemented by Racket

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https://github.com/rieselhilfe/sofunlang

An Interpreter for my language "Sofun" (Stack-Oriented FUNctional programming language) written in haskell. Now with a basic type system.

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https://github.com/javanile/boor

🐮 Use only if you hate good manners

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https://github.com/dyalog/presentations

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https://github.com/abengl/ntt-project1

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

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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/jin-sungdae/javastream

Functional Programming in Java && Stream

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https://github.com/unacorbatanegra/tie_fp

FP opinionated in Flutter & Dart

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Church encoding to represent typical programming structures on Javascript

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https://github.com/baransu/sugar

Experimental, fuctional language for creating webapps

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https://github.com/maximkrouk/swift-udf-tutorial

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https://github.com/atticuskuhn/typescript-lens

lens library in typescript

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https://github.com/lazywithclass/project-lamp

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

Functional Programming Practice.

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https://github.com/tbhvishal/js-toolbox

Lightweight JavaScript utilities toolkit: helpers, snippets, and productivity tools. ESM, Node.js, TypeScript-friendly, zero dependencies. Arrays, strings, dates, async, functional programming - perfect for beginners and pros

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