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https://github.com/arrow-kt/arrow

Λrrow - Functional companion to Kotlin's Standard Library
https://github.com/arrow-kt/arrow

arrow continuations coroutines delimited-continuations for-comprehension fp-types functional-data-structure functional-programming hacktoberfest kotlin kotlin-dsl kotlin-libraries kotlin-library monads optics polymorphism typeclasses typed-lambda-calculus

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Λrrow - Functional companion to Kotlin's Standard Library

Host: GitHub
URL: https://github.com/arrow-kt/arrow
Owner: arrow-kt
License: other
Created: 2017-03-24T10:43:11.000Z (over 7 years ago)
Default Branch: main
Last Pushed: 2024-05-10T12:11:50.000Z (6 months ago)
Last Synced: 2024-05-10T22:04:26.978Z (6 months ago)
Topics: arrow, continuations, coroutines, delimited-continuations, for-comprehension, fp-types, functional-data-structure, functional-programming, hacktoberfest, kotlin, kotlin-dsl, kotlin-libraries, kotlin-library, monads, optics, polymorphism, typeclasses, typed-lambda-calculus
Language: Kotlin
Homepage: http://arrow-kt.io
Size: 51.1 MB
Stars: 5,975
Watchers: 95
Forks: 436
Open Issues: 43
Metadata Files:
- Readme: README.md
- Contributing: CONTRIBUTING.md
- License: LICENSE
- Code of conduct: CODE_OF_CONDUCT.md

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README

        

[![Maven Central](https://img.shields.io/maven-central/v/io.arrow-kt/arrow-core?color=4caf50&label=latest%20release)](https://central.sonatype.com/search?q=g:io.arrow-kt)

[![Kotlin version](https://img.shields.io/badge/Kotlin-1.8.10-blue)](https://kotlinlang.org/docs/whatsnew18.html)

[![License](https://img.shields.io/badge/License-Apache%202.0-blue.svg)](https://www.apache.org/licenses/LICENSE-2.0)

[![StackOverflow](https://img.shields.io/badge/arrow--kt-grey.svg?logo=stackoverflow)](https://stackoverflow.com/questions/tagged/arrow-kt)

[![Twitter](https://img.shields.io/twitter/follow/arrow_kt?color=blue&style=flat)](https://twitter.com/arrow_kt)

Λrrow is a library for Typed Functional Programming in Kotlin.

Arrow aims to provide a [*lingua franca*](https://en.wikipedia.org/wiki/Lingua_franca) of interfaces

and abstractions across Kotlin libraries. For this, it includes the most popular data types such

as `Option`, and `Either`, functional operators such as `zipOrAccumulate`, and computation

blocks to empower users to write pure FP apps and libraries built atop higher order abstractions.

## [Documentation](http://arrow-kt.io)

- [Quickstart and setup](https://arrow-kt.io/learn/quickstart/)

- [Typed errors](https://arrow-kt.io/learn/typed-errors/)

- [Coroutines and resources](https://arrow-kt.io/learn/coroutines/)

- [Resilience](https://arrow-kt.io/learn/resilience/)

- [Immutable data](https://arrow-kt.io/learn/immutable-data/)

- [Collections and functions](https://arrow-kt.io/learn/collections-functions/)

The documentation is hosted in a [separate repository](https://github.com/arrow-kt/arrow-website).

## Arrow 2.0

⚠️ _**Every new API has been backported to Arrow 1.2**. We strongly discourage from using Arrow 2.0

at this point, except for testing purposes, and use Arrow 1.2 instead._

The next version of Arrow is [in active development](https://github.com/arrow-kt/arrow/pull/2778).

If you want to try it, you need to add the following repository in your build file:

```

maven("https://oss.sonatype.org/content/repositories/snapshots")

```

and depend on the `2.0.0-SNAPSHOT` version of the desired library.

## Join Us

Arrow is an inclusive community powered by awesome individuals like you. As an actively growing

ecosystem, Arrow and its associated libraries and toolsets are in need of new contributors! We have

issues suited for all levels, from entry to advanced, and our maintainers are happy to provide 1:1

mentoring. All are welcome in Arrow.

If you’re looking to contribute, have questions, or want to keep up-to-date about what’s happening,

please follow us here and say hello!

- [Arrow on Twitter](https://twitter.com/arrow_kt)

- [#arrow on Kotlin Slack](https://kotlinlang.slack.com/messages/C5UPMM0A0)

- [#arrow-contributors on Kotlin Slack](https://kotlinlang.slack.com/archives/C8UK6RTHU)

- [Arrow on Gitter](https://gitter.im/arrow-kt/Lobby)

Find more details in [CONTRIBUTING](CONTRIBUTING.md).

## License

    Copyright (C) 2017 The Λrrow Authors

    Licensed under the Apache License, Version 2.0 (the "License");

    you may not use this file except in compliance with the License.

    You may obtain a copy of the License at

       http://www.apache.org/licenses/LICENSE-2.0

    Unless required by applicable law or agreed to in writing, software

    distributed under the License is distributed on an "AS IS" BASIS,

    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

    See the License for the specific language governing permissions and

    limitations under the License.