Top 780 functional-programming open source projects

🦋 Fantasy Land compliant (monadic) alternative to Promises

An Open Source Android Launcher built with Scala on Android

A python lens library for manipulating deeply nested immutable structures

Swift µframework with extensions for the Optional Type

A statically typed functional programming language for the web.

Linguagem Potigol - Linguagem de programação funcional moderna para iniciantes - A Functional Programming Language for Beginners

Thread-safe, persistent, immutable collections for the Crystal language

Examples with Functional JavaScript, following Professor Frisby's course

Understand and reduce your carbon footprint 🌱 iOS & Android.

Cuneiform distributed programming language

A library of Haskell-style morphisms ported to ES2015 JavaScript using Babel.

An OCaml kernel for Jupyter (IPython) notebook

Hide secrets with invisible characters in plain text securely using passwords 🧙🏻‍♂️⭐

First-class patterns for Clojure. Made with love, functions, and just the right amount of syntax.

What I Wish I Knew When Learning Haskell

Fast [co]product types with a clean syntax. For Cats & Scalaz.

Boilerplate-free syntax for computations with effects

An elegant and simple curry(f) implementation in PHP.

Quick, graphical, fun introduction to programming in Scala.

Runtime type checking for JS with Hindley Milner signatures

Functional programming toolkit for building server applications in Scala.

C++ as a Pure Functional Programming Language

函数式编程指北中文版

Design by contract for Python with static checker and tests' generation.

🏛 Functional Architecture in Swift using Bow

Random Data Generation and/or Property Testing in Scala & Scala.JS.

Monad, Functional Programming features for Golang

Manage side-effects in your javascript application cleanly with algebraic effects

A higher-order function for retrying operations that may fail.

A functional language for C99 preprocessor metaprogramming

Domain Specific Languages of Mathematics

This repo contains all c++ / haskell samples from Bartosz Milewski's book (Category Theory for Programmers) converted to csharp and fsharp

Set of extensions for Kotlin that provides Discrete math functionalities

A purely functional JSON library for Kotlin built on Λrrow

L1: Tensor Studio — The playground for tensors

Compositional, streaming I/O library for Scala

The practice of MVI + Jetpack architecture in Android.

Python library for creating data pipelines with chain functional programming

EasySequence is a powerful fundamental library to process sequcence type, such as array, set, dictionary. All type object which conforms to NSFastEnumeration protocol can be initialzed to an EZSequence instance, then you can operation with them. Finally, you can transfer them back to the original type.

A compiler from ML to C++ template language

Write Apps like Mathematical Equations!

Next Level MTL for Scala

A puzzle game inspired by functional programming

Functional JDBC layer for Scala.

c++ LINQ -like library of higher-order functions for data manipulation

Power of object-oriented programming with the elegance of functional programming in PHP.

🌳 A tiny language interpreter implemented purely in TypeScript's type-system

Extended version of Rambda

Zero-cost state-machine library for robust, testable and portable user interfaces (most machines compile ~1-2KB)

Defines immutable, safe data structures for describing IP addresses, multicast joins, socket addresses and similar IP & network related data types

Asynchronous, Reactive Programming for Scala and Scala.js.

Collection of fast and lazy operations

JavaScript parser-combinator library

A Reactive Programming library for JavaScript

Declarative concurrency in Scala - The implementation of the chemical machine

Marble.js - functional reactive Node.js framework for building server-side applications, based on TypeScript and RxJS.

🤘Utility library for functional JavaScript. With ❤️ to Ramda.

Composable, purely functional healthchecks in Scala.

Most.js based middleware for Redux. Handle async actions with monadic streams & reactive programming.

Functional Telegram Bot API for Scala