https://github.com/spebbe/dartz

Functional programming in Dart
https://github.com/spebbe/dartz

dart functional-programming

Last synced: about 2 months ago
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Functional programming in Dart

• Host: GitHub
• URL: https://github.com/spebbe/dartz
• Owner: spebbe
• License: mit
• Created: 2016-02-11T18:43:17.000Z (almost 9 years ago)
• Default Branch: master
• Last Pushed: 2023-09-20T08:11:40.000Z (over 1 year ago)
• Last Synced: 2024-08-01T12:19:26.442Z (5 months ago)
• Topics: dart, functional-programming
• Language: Dart
• Size: 1.38 MB
• Stars: 748
• Watchers: 20
• Forks: 60
• Open Issues: 30
• Metadata Files:
  • Readme: README.md
  • Changelog: CHANGELOG.md
  • License: LICENSE

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README

        
dartz

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[![License](https://img.shields.io/github/license/spebbe/dartz?style=flat-square&logo=github)](https://github.com/spebbe/dartz/blob/master/LICENSE) [![Pub.dev](https://img.shields.io/pub/v/dartz.svg?style=flat-square&logo=data:image/png;base64,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)](https://pub.dartlang.org/packages/dartz) [![Github Stars](https://img.shields.io/github/stars/spebbe/dartz?style=flat-square&logo=github)](https://github.com/spebbe/dartz) 

Functional programming in Dart

* Type class hierarchy in the spirit of [cats](https://typelevel.org/cats/), [scalaz](https://github.com/scalaz/scalaz) and [the standard Haskell libraries](https://wiki.haskell.org/Typeclassopedia)

* Immutable, persistent collections, including IVector, IList, IMap, IHashMap, ISet and AVLTree

* Option, Either, State, Tuple, Free, Lens and other tools for programming in a functional style

* Evaluation, a Reader+Writer+State+Either+Future swiss army knife monad

* Type class instances (Monoids, Traversable Functors, Monads and so on) for included types, as well as for several standard Dart types

* Conveyor, an implementation of pure functional streaming

* [Examples](https://github.com/spebbe/dartz/tree/master/example), showcasing core concepts

##### New to functional programming?

A good place to start learning is the excellent [Functional Programming in Scala](https://www.manning.com/books/functional-programming-in-scala) by Paul Chiusano and Rúnar Bjarnason. I can not recommend this book highly enough.  

You can also take a look at [Category Theory for Programmers](https://github.com/hmemcpy/milewski-ctfp-pdf) by Bartosz Milewski.

##### Status

* Starting with version 0.10.0, Dart 2.12+ is required

* 0.9.x supports Dart 1 and older Dart 2 versions

* Basic type class structure and collection classes are relatively stable, but might see restructuring in future releases

* Optimized for dart2js/node/v8, with performance on the dart vm being of distant secondary concern

* Most things are stack safe and reasonably efficient, but there are a couple of exceptions and plenty of room for further optimizations

* The streaming/conveyor stuff is highly experimental

* The lens implementation is experimental and very bare bones

##### License/Disclaimer

See [LICENSE](https://github.com/spebbe/dartz/blob/master/LICENSE)